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... ... @@ -4,13 +4,8 @@
4 4  **LT-22222-L LoRa IO Controller User Manual **
5 5  
6 6  
7 -**Table of Contents:**
8 8  
9 -{{toc/}}
10 10  
11 -
12 -
13 -
14 14  = 1.Introduction =
15 15  
16 16  == 1.1 What is LT Series I/O Controller ==
... ... @@ -45,114 +45,44 @@
45 45  
46 46  == 1.2  Specifications ==
47 47  
48 -(((
49 49  **Hardware System:**
50 -)))
51 51  
52 -* (((
53 -STM32L072CZT6 MCU
54 -)))
55 -* (((
56 -SX1276/78 Wireless Chip 
57 -)))
58 -* (((
59 -(((
60 -Power Consumption:
61 -)))
45 +* STM32L072CZT6 MCU
46 +* SX1276/78 Wireless Chip 
47 +* Power Consumption:
48 +** Idle: 4mA@12v
49 +** 20dB Transmit: 34mA@12v
62 62  
63 -* (((
64 -Idle: 4mA@12v
65 -)))
66 -* (((
67 -20dB Transmit: 34mA@12v
68 -)))
69 -)))
70 -
71 -(((
72 72  **Interface for Model: LT22222-L:**
73 -)))
74 74  
75 -* (((
76 -2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
77 -)))
78 -* (((
79 -2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
80 -)))
81 -* (((
82 -2 x Relay Output (5A@250VAC / 30VDC)
83 -)))
84 -* (((
85 -2 x 0~~20mA Analog Input (res:0.01mA)
86 -)))
87 -* (((
88 -2 x 0~~30V Analog Input (res:0.01v)
89 -)))
90 -* (((
91 -Power Input 7~~ 24V DC. 
92 -)))
53 +* 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
54 +* 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
55 +* 2 x Relay Output (5A@250VAC / 30VDC)
56 +* 2 x 0~~20mA Analog Input (res:0.01mA)
57 +* 2 x 0~~30V Analog Input (res:0.01v)
58 +* Power Input 7~~ 24V DC. 
93 93  
94 -(((
95 95  **LoRa Spec:**
96 -)))
97 97  
98 -* (((
99 -(((
100 -Frequency Range:
101 -)))
62 +* Frequency Range:
63 +** Band 1 (HF): 862 ~~ 1020 Mhz
64 +** Band 2 (LF): 410 ~~ 528 Mhz
65 +* 168 dB maximum link budget.
66 +* +20 dBm - 100 mW constant RF output vs.
67 +* +14 dBm high efficiency PA.
68 +* Programmable bit rate up to 300 kbps.
69 +* High sensitivity: down to -148 dBm.
70 +* Bullet-proof front end: IIP3 = -12.5 dBm.
71 +* Excellent blocking immunity.
72 +* Low RX current of 10.3 mA, 200 nA register retention.
73 +* Fully integrated synthesizer with a resolution of 61 Hz.
74 +* FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
75 +* Built-in bit synchronizer for clock recovery.
76 +* Preamble detection.
77 +* 127 dB Dynamic Range RSSI.
78 +* Automatic RF Sense and CAD with ultra-fast AFC.
79 +* Packet engine up to 256 bytes with CRC.
102 102  
103 -* (((
104 -Band 1 (HF): 862 ~~ 1020 Mhz
105 -)))
106 -* (((
107 -Band 2 (LF): 410 ~~ 528 Mhz
108 -)))
109 -)))
110 -* (((
111 -168 dB maximum link budget.
112 -)))
113 -* (((
114 -+20 dBm - 100 mW constant RF output vs.
115 -)))
116 -* (((
117 -+14 dBm high efficiency PA.
118 -)))
119 -* (((
120 -Programmable bit rate up to 300 kbps.
121 -)))
122 -* (((
123 -High sensitivity: down to -148 dBm.
124 -)))
125 -* (((
126 -Bullet-proof front end: IIP3 = -12.5 dBm.
127 -)))
128 -* (((
129 -Excellent blocking immunity.
130 -)))
131 -* (((
132 -Low RX current of 10.3 mA, 200 nA register retention.
133 -)))
134 -* (((
135 -Fully integrated synthesizer with a resolution of 61 Hz.
136 -)))
137 -* (((
138 -FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
139 -)))
140 -* (((
141 -Built-in bit synchronizer for clock recovery.
142 -)))
143 -* (((
144 -Preamble detection.
145 -)))
146 -* (((
147 -127 dB Dynamic Range RSSI.
148 -)))
149 -* (((
150 -Automatic RF Sense and CAD with ultra-fast AFC.
151 -)))
152 -* (((
153 -Packet engine up to 256 bytes with CRC.
154 -)))
155 -
156 156  == 1.3 Features ==
157 157  
158 158  * LoRaWAN Class A & Class C protocol
... ... @@ -199,21 +199,13 @@
199 199  
200 200  == 3.1 How it works? ==
201 201  
202 -(((
203 203  The LT is configured as LoRaWAN OTAA Class C mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and power on the LT. It will auto join the network via OTAA. For LT-22222-L, the LED will show the Join status: After power on **TX LED** will fast blink 5 times, LT-22222-L will enter working mode and start to JOIN LoRaWAN network. **TX LED** will be on for 5 seconds after joined in network. When there is message from server, the **RX LED** will be on for 1 second. 
204 -)))
205 205  
206 -(((
207 -In case user can’t set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H4.UseATCommand]] to set the keys in the devices.
208 -)))
129 +In case user can’t set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>path:#AT_Command]] to set the keys in the devices.
209 209  
210 -(((
211 211  3.2 Example to join LoRaWAN network
212 -)))
213 213  
214 -(((
215 215  This chapter shows an example for how to join the TTN LoRaWAN Network. Below is the network structure, we use our LG308 as LoRaWAN gateway here. 
216 -)))
217 217  
218 218  [[image:image-20220523172350-1.png||height="266" width="864"]]
219 219  
... ... @@ -405,7 +405,7 @@
405 405  **ATZ**
406 406  )))
407 407  
408 -Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
325 +Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
409 409  
410 410  === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
411 411  
... ... @@ -413,8 +413,11 @@
413 413  
414 414  The AVI1 is also used for counting. AVI1 is used to monitor the voltage. It will check the voltage **every 60s**, if voltage is higher or lower than VOLMAX mV, the AVI1 Counting increase 1, so AVI1 counting can be used to measure a machine working hour.
415 415  
416 -[[image:image-20220523181903-8.png]]
417 417  
334 +(% border="1" style="background-color:#f7faff; width:601px" %)
335 +|(% style="width:111px" %)Size(bytes)|(% style="width:85px" %)4|(% style="width:130px" %)4|(% style="width:92px" %)1|(% style="width:94px" %)1|(% style="width:86px" %)1
336 +|(% style="width:111px" %)Value|(% style="width:85px" %)COUNT1|(% style="width:130px" %)AVI1 Counting|(% style="width:92px" %)DIDORO*|(% style="width:94px" %)Reserve|(% style="width:86px" %)MOD
337 +
418 418  (((
419 419  (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
420 420  )))
... ... @@ -425,123 +425,141 @@
425 425  * FIRST: Indicate this is the first packet after join network.
426 426  * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
427 427  
428 -(% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
348 +Note: DO3 is not valid for LT-22222-L.
429 429  
430 -**To use this mode, please run:**
431 431  
432 -(% class="box infomessage" %)
433 -(((
434 -**AT+MOD=4**
435 -)))
351 +To use this mode, please run:
436 436  
437 -(% class="box infomessage" %)
438 -(((
439 -**ATZ**
440 -)))
353 +AT+MOD=4
441 441  
355 +ATZ
442 442  
443 -Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
444 444  
445 -**Plus below command for AVI1 Counting:**
446 446  
447 -(% class="box infomessage" %)
448 -(((
449 -**AT+SETCNT=3,60   (set AVI Count to 60)**
450 -)))
359 +Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
451 451  
452 -(% class="box infomessage" %)
453 -(((
454 -**AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
455 -)))
361 +Plus below command for AVI1 Counting:
456 456  
457 -(% class="box infomessage" %)
458 -(((
459 -**AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
460 -)))
363 +AT+SETCNT=3,60   (set AVI Count to 60)
461 461  
462 -(% class="box infomessage" %)
463 -(((
464 -**AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
465 -)))
365 +AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)
466 466  
467 -=== 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
367 +AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)
468 468  
369 +AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)
370 +
371 +
372 +
373 +1.
374 +11.
375 +111. AT+MOD=5, Single DI Counting + 2 x AVI + 1 x ACI
376 +
377 +**LT33222-L**: This mode the DI3 is used as a counting pin.
378 +
469 469  **LT22222-L**: This mode the DI1 is used as a counting pin.
470 470  
471 -[[image:image-20220523182334-9.png]]
472 472  
473 -(((
474 -(% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
475 -)))
382 +(% border="1" style="background-color:#f7faff" %)
383 +|Size(bytes)|2|2|2|2|1|1|1
384 +|Value|(((
385 +AVI1
476 476  
387 +voltage
388 +)))|(((
389 +AVI2
390 +
391 +voltage
392 +)))|(((
393 +ACI1
394 +
395 +Current
396 +)))|COUNT1|DIDORO*|(((
397 +Reserve
398 +
399 +
400 +)))|MOD
401 +
402 +**DIDORO** is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
403 +
404 +(% border="1" style="background-color:#f7faff" %)
405 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
406 +|RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
407 +
477 477  * RO is for relay. ROx=1 : close，ROx=0 always open.
478 478  * FIRST: Indicate this is the first packet after join network.
479 479  * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
480 480  
481 -(% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
412 +Note: DO3 is not valid for LT-22222-L.
482 482  
483 -**To use this mode, please run:**
484 484  
485 -(% class="box infomessage" %)
486 -(((
487 -**AT+MOD=5**
488 -)))
415 +To use this mode, please run:
489 489  
490 -(% class="box infomessage" %)
491 -(((
492 -**ATZ**
493 -)))
417 +AT+MOD=5
494 494  
495 -Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
419 +ATZ
496 496  
497 -=== 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
498 498  
499 -(% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
422 +Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
500 500  
424 +
425 +
426 +
427 +
428 +1.
429 +11.
430 +111. AT+ADDMOD=6. (Trigger Mode, Optional)
431 +
432 +**This mode is an optional mode for trigger purpose. It can run together with other mode.**
433 +
501 501  For example, if user has configured below commands:
502 502  
503 -* **AT+MOD=1 ** **~-~->** The normal working mode
504 -* **AT+ADDMOD6=1**   **~-~->** Enable trigger
436 +* AT+MOD=1   à The normal working mode
437 +* AT+ADDMOD6=1    à Enable trigger
505 505  
506 506  LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
507 507  
508 -1. Periodically uplink (Base on TDC time). Payload is same as the normal MOD (MOD 1 for above command). This uplink uses LoRaWAN (% style="color:#4f81bd" %)**unconfirmed**(%%) data type
509 -1. Trigger uplink when meet the trigger condition. LT will sent two packets in this case, the first uplink use payload specify in this mod (mod=6), the second packets use the normal mod payload(MOD=1 for above settings). Both Uplinks use LoRaWAN (% style="color:#4f81bd" %)**CONFIRMED data type.**
441 +1. Periodically uplink (Base on TDC time). Payload is same as the normal MOD (MOD 1 for above command). This uplink uses LoRaWAN **unconfirmed** data type
442 +1. Trigger uplink when meet the trigger condition. LT will sent two packets in this case, the first uplink use payload specify in this mod (mod=6), the second packets use the normal mod payload(MOD=1 for above settings). Both Uplinks use LoRaWAN **CONFIRMED data type.**
510 510  
511 511  **AT Command to set Trigger Condition**:
512 512  
513 -(% style="color:#4f81bd" %)**Trigger base on voltage**:
446 +**Trigger base on voltage**:
514 514  
515 515  Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
516 516  
517 -**Example:**
450 +Example:
518 518  
519 519  AT+AVLIM=3000,6000,0,2000   (If AVI1 voltage lower than 3v or higher than 6v. or AV2 voltage is higher than 2v, LT will trigger Uplink)
520 520  
521 521  AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
522 522  
523 -(% style="color:#4f81bd" %)**Trigger base on current**:
524 524  
457 +**Trigger base on current**:
458 +
525 525  Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
526 526  
527 -**Example:**
461 +Example:
528 528  
529 529  AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
530 530  
531 -(% style="color:#4f81bd" %)**Trigger base on DI status**:
532 532  
466 +**Trigger base on DI status**:
467 +
533 533  DI status trigger Flag.
534 534  
535 535  Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
536 536  
537 -**Example:**
472 +Example:
538 538  
539 539  AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
540 540  
541 541  
477 +
478 +
479 +
542 542  **Downlink Command to set Trigger Condition**
543 543  
544 -Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
482 +Type Code: 0xAA. Downlink command same as AT Command [[AT+AVLIM, AT+ACLIM>>path:#AT_Trigger]]
545 545  
546 546  Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
547 547  
... ... @@ -557,49 +557,143 @@
557 557  
558 558   Yy4 yy4: AC2 or AV2 high limit.
559 559  
560 -**Example1**: AA 00 13 88 00 00 00 00 00 00
561 561  
499 +Example1: AA 00 13 88 00 00 00 00 00 00
500 +
562 562  Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
563 563  
564 -**Example2**: AA 02 01 00
503 +Example2: AA 02 01 00
565 565  
566 566  Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
567 567  
568 -(% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
569 569  
508 +
509 +
510 +**Trigger Settings Payload Explanation:**
511 +
570 570  MOD6 Payload : total 11 bytes payload
571 571  
572 -[[image:image-20220524085923-1.png]]
514 +(% border="1" style="background-color:#f7faff" %)
515 +|Size(bytes)|1|1|1|6|1|1
516 +|Value|(((
517 +TRI_A
573 573  
574 -(% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
519 +FLAG
520 +)))|(((
521 +TRI_A
575 575  
576 -[[image:image-20220524090106-2.png]]
523 +Status
524 +)))|(((
525 +TRI_DI
577 577  
527 +FLAG+STA
528 +)))|Reserve|Enable/Disable MOD6|(((
529 +MOD
530 +
531 +(6)
532 +)))
533 +
534 +**TRI FLAG1** is a combination to show if trigger is set for this part. Totally 1byte as below
535 +
536 +(% border="1" style="background-color:#f7faff" %)
537 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
538 +|(((
539 +AV1_
540 +
541 +LOW
542 +)))|(((
543 +AV1_
544 +
545 +HIGH
546 +)))|(((
547 +AV2_
548 +
549 +LOW
550 +)))|(((
551 +AV2_
552 +
553 +HIGH
554 +)))|(((
555 +AC1_
556 +
557 +LOW
558 +)))|(((
559 +AC1_
560 +
561 +HIGH
562 +)))|(((
563 +AC2_
564 +
565 +LOW
566 +)))|(((
567 +AC2_
568 +
569 +HIGH
570 +)))
571 +
578 578  * Each bits shows if the corresponding trigger has been configured.
579 579  
580 -**Example:**
574 +Example:
581 581  
582 582  10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
583 583  
584 584  
585 -(% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
579 +**TRI Status1** is a combination to show which condition is trigger. Totally 1byte as below
586 586  
587 -[[image:image-20220524090249-3.png]]
581 +(% border="1" style="background-color:#f7faff" %)
582 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
583 +|(((
584 +AV1_
588 588  
586 +LOW
587 +)))|(((
588 +AV1_
589 +
590 +HIGH
591 +)))|(((
592 +AV2_
593 +
594 +LOW
595 +)))|(((
596 +AV2_
597 +
598 +HIGH
599 +)))|(((
600 +AC1_
601 +
602 +LOW
603 +)))|(((
604 +AC1_
605 +
606 +HIGH
607 +)))|(((
608 +AC2_
609 +
610 +LOW
611 +)))|(((
612 +AC2_
613 +
614 +HIGH
615 +)))
616 +
589 589  * Each bits shows which status has been trigger on this uplink.
590 590  
591 -**Example:**
619 +Example:
592 592  
593 593  10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
594 594  
595 595  
596 -(% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
597 597  
598 -[[image:image-20220524090456-4.png]]
599 599  
626 +**TRI_DI FLAG+STA **is a combination to show which condition is trigger. Totally 1byte as below
627 +
628 +(% border="1" style="background-color:#f7faff" %)
629 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
630 +|N/A|N/A|N/A|N/A|DI2_STATUS|DI2_FLAG|DI1_STATUS|DI1_FLAG
631 +
600 600  * Each bits shows which status has been trigger on this uplink.
601 601  
602 -**Example:**
634 +Example:
603 603  
604 604  00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
605 605  
... ... @@ -606,117 +606,117 @@
606 606  00000101: Means both DI1 and DI2 trigger are enabled.
607 607  
608 608  
609 -(% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
641 +**Enable/Disable MOD6 **: 0x01: MOD6 is enable. 0x00: MOD6 is disable.
610 610  
643 +
611 611  Downlink command to poll MOD6 status:
612 612  
613 -**AB 06**
646 +AB 06
614 614  
615 615  When device got this command, it will send the MOD6 payload.
616 616  
617 -=== 3.3.7 Payload Decoder ===
618 618  
619 -(((
651 +1.
652 +11.
653 +111. Payload Decoder
654 +
620 620  **Decoder for TTN/loraserver/ChirpStack**: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/Payload_decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/Payload_decoder/]]
621 -)))
622 622  
623 -== 3.4 ​Configure LT via AT or Downlink ==
624 624  
625 -User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
626 626  
627 -(((
659 +
660 +
661 +
662 +
663 +1.
664 +11. ​Configure LT via AT or Downlink
665 +
666 +User can configure LT I/O Controller via [[AT Commands >>path:#_​Using_the_AT]]or LoRaWAN Downlink Commands
667 +
628 628  There are two kinds of Commands:
629 -)))
630 630  
631 -* (% style="color:#4f81bd" %)**Common Commands**(%%): They should be available for each sensor, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: http:~/~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands
670 +* **Common Commands**: They should be available for each sensor, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: http:~/~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands
632 632  
633 -* (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
672 +* **Sensor Related Commands**: These commands are special designed for LT-22222-L.  User can see these commands below:
634 634  
635 -=== 3.4.1 Common Commands ===
674 +1.
675 +11.
676 +111. Common Commands:
636 636  
637 -They should be available for each of Dragino Sensors, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: [[End Device AT Commands and Downlink Command>>http://8.211.40.43:8080/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/]]
678 +They should be available for each of Dragino Sensors, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: http:~/~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands
638 638  
639 -=== 3.4.2 Sensor related commands ===
640 640  
641 -==== 3.4.2.1 Set Transmit Interval ====
681 +1.
682 +11.
683 +111. Sensor related commands:
642 642  
685 +==== Set Transmit Interval ====
686 +
643 643  Set device uplink interval.
644 644  
645 645  * AT Command:
646 646  
647 -(% class="box infomessage" %)
648 -(((
649 -**AT+TDC=N **
650 -)))
691 +AT+TDC=N
651 651  
652 -**Example: **AT+TDC=30000. Means set interval to 30 seconds
693 +Example: AT+TDC=30000. Means set interval to 30 seconds
653 653  
695 +
654 654  * Downlink Payload (prefix 0x01):
655 655  
656 -(% class="box infomessage" %)
657 -(((
658 -**0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
659 -)))
698 +0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)
660 660  
661 -==== 3.4.2.2 Set Work Mode (AT+MOD) ====
662 662  
701 +==== Set Work Mode (AT+MOD) ====
702 +
663 663  Set work mode.
664 664  
665 665  * AT Command:
666 666  
667 -(% class="box infomessage" %)
668 -(((
669 -**AT+MOD=N  **
670 -)))
707 +AT+MOD=N 
671 671  
672 -**Example**: AT+MOD=2. Set work mode to Double DI counting mode
709 +Example: AT+MOD=2. Set work mode to Double DI counting mode
673 673  
711 +
674 674  * Downlink Payload (prefix 0x0A):
675 675  
676 -(% class="box infomessage" %)
677 -(((
678 -**0x0A aa     ~/~/ Same as AT+MOD=aa**
679 -)))
714 +0x0A aa     ~/~/ Same as AT+MOD=aa
680 680  
681 -==== 3.4.2.3 Poll an uplink ====
682 682  
717 +
718 +==== Poll an uplink ====
719 +
683 683  * AT Command:
684 684  
685 685  There is no AT Command to poll uplink
686 686  
724 +
687 687  * Downlink Payload (prefix 0x08):
688 688  
689 -(% class="box infomessage" %)
690 -(((
691 -**0x08 FF     ~/~/ Poll an uplink,**
692 -)))
727 +0x08 FF     ~/~/ Poll an uplink,
693 693  
694 -**Example**: 0x08FF, ask device to send an Uplink
729 +Example: 0x08FF, ask device to send an Uplink
695 695  
696 -==== 3.4.2.4 Enable Trigger Mode ====
697 697  
698 -Use of trigger mode, please check [[ADDMOD6>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
732 +==== Enable Trigger Mode ====
699 699  
734 +Use of trigger mode, please check [[ADDMOD6>>path:#MOD6]]
735 +
700 700  * AT Command:
701 701  
702 -(% class="box infomessage" %)
703 -(((
704 -**AT+ADDMOD6=1 or 0**
705 -)))
738 +AT+ADDMOD6=1 or 0
706 706  
707 707  1: Enable Trigger Mode
708 708  
709 709  0: Disable Trigger Mode
710 710  
744 +
711 711  * Downlink Payload (prefix 0x0A 06):
712 712  
713 -(% class="box infomessage" %)
714 -(((
715 -**0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
716 -)))
747 +0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,
717 717  
718 -==== 3.4.2.5 Poll trigger settings ====
719 719  
750 +==== Poll trigger settings ====
751 +
720 720  Poll trigger settings,
721 721  
722 722  * AT Command:
... ... @@ -723,337 +723,339 @@
723 723  
724 724  There is no AT Command for this feature.
725 725  
758 +
726 726  * Downlink Payload (prefix 0x AB 06):
727 727  
728 -(% class="box infomessage" %)
729 -(((
730 -**0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
731 -)))
761 +0xAB 06  ~/~/ Poll trigger settings, device will uplink [[trigger settings>>path:#Trigger_Settings]] once receive this command
732 732  
733 -==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
734 734  
764 +==== Enable / Disable DI1/DI2/DI3 as trigger ====
765 +
735 735  Enable Disable DI1/DI2/DI2 as trigger,
736 736  
737 737  * AT Command:
738 738  
739 -(% class="box infomessage" %)
740 -(((
741 -**Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
742 -)))
770 +Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
743 743  
744 -**Example:**
772 +Example:
745 745  
746 746  AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
747 747  
776 +
777 +
748 748  * Downlink Payload (prefix 0xAA 02):
749 749  
750 -(% class="box infomessage" %)
751 -(((
752 -**0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
753 -)))
780 +0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb
754 754  
755 -==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
756 756  
783 +
784 +==== Trigger1 – Set DI1 or DI3 as trigger ====
785 +
757 757  Set DI1 or DI3(for LT-33222-L) trigger.
758 758  
759 759  * AT Command:
760 760  
761 -(% class="box infomessage" %)
762 -(((
763 -**AT+TRIG1=a,b**
764 -)))
790 +AT+TRIG1=a,b
765 765  
766 766  a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
767 767  
768 768  b : delay timing.
769 769  
770 -**Example:**
796 +Example:
771 771  
772 772  AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
773 773  
800 +
774 774  * Downlink Payload (prefix 0x09 01 ):
775 775  
776 -(% class="box infomessage" %)
777 -(((
778 -**0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
779 -)))
803 +0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)
780 780  
781 -==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
782 782  
806 +==== Trigger2 – Set DI2 as trigger ====
807 +
783 783  Set DI2 trigger.
784 784  
785 785  * AT Command:
786 786  
787 -(% class="box infomessage" %)
788 -(((
789 -**AT+TRIG2=a,b**
790 -)))
812 +AT+TRIG2=a,b
791 791  
792 792  a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
793 793  
794 794  b : delay timing.
795 795  
796 -**Example:**
818 +Example:
797 797  
798 798  AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
799 799  
822 +
800 800  * Downlink Payload (prefix 0x09 02 ):
801 801  
802 -(% class="box infomessage" %)
803 -(((
804 -**0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
805 -)))
825 +0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)
806 806  
807 -==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
808 808  
809 -Set current trigger , base on AC port. See [[trigger mode>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
828 +==== Trigger – Set AC (current) as trigger ====
810 810  
830 +Set current trigger , base on AC port. See [[trigger mode>>path:#MOD6]]
831 +
811 811  * AT Command:
812 812  
813 -(% class="box infomessage" %)
814 -(((
815 -**AT+ACLIM. **
816 -)))
834 +AT+ACLIM. See [[trigger mode>>path:#MOD6]]
817 817  
836 +
818 818  * Downlink Payload (prefix 0xAA 01 ):
819 819  
820 -(% class="box infomessage" %)
821 -(((
822 -**0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]**
823 -)))
839 +0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>path:#MOD6]]
824 824  
825 -==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
826 826  
827 -Set current trigger , base on AV port. See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
842 +==== Trigger – Set AV (voltage) as trigger ====
828 828  
844 +Set current trigger , base on AV port. See [[trigger mode>>path:#MOD6]]
845 +
829 829  * AT Command:
830 830  
831 -(% class="box infomessage" %)
832 -(((
833 -**AT+AVLIM. See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]**
834 -)))
848 +AT+AVLIM. See [[trigger mode>>path:#MOD6]]
835 835  
850 +
836 836  * Downlink Payload (prefix 0xAA 00 ):
837 837  
838 -(% class="box infomessage" %)
839 -(((
840 -**0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]] **
841 -)))
853 +0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>path:#MOD6]]
842 842  
843 -==== 3.4.2.11 Trigger – Set minimum interval ====
855 +==== Trigger – Set minimum interval ====
844 844  
845 845  Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
846 846  
847 847  * AT Command:
848 848  
849 -(% class="box infomessage" %)
850 -(((
851 -**AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
852 -)))
861 +AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.
853 853  
863 +
854 854  * Downlink Payload (prefix 0xAC ):
855 855  
856 -(% class="box infomessage" %)
857 -(((
858 -**0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
859 -)))
866 +0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
860 860  
861 -==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
862 862  
869 +==== DO ~-~- Control Digital Output DO1/DO2/DO3 ====
870 +
863 863  * AT Command:
864 864  
865 865  There is no AT Command to control Digital Output
866 866  
875 +
867 867  * Downlink Payload (prefix 0x02):
868 868  
869 -(% class="box infomessage" %)
870 -(((
871 -**0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
872 -)))
878 +0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output
873 873  
874 -(((
875 875  If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
876 -)))
877 877  
878 -(((
879 879  01: Low,  00: High ,  11: No action
880 -)))
881 881  
882 -[[image:image-20220524092754-5.png]]
884 +(% border="1" style="background-color:#f7faff" %)
885 +|Downlink Code|DO1|DO2|DO3
886 +|02  01  00  11|Low|High|No Action
887 +|02  00  11  01|High|No Action|Low
888 +|02  11  01  00|No Action|Low|High
883 883  
884 -(((
885 -(% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
886 -)))
890 +Note: For LT-22222-L, there is no DO3, the last byte can use any value.
887 887  
888 -(((
889 -(% style="color:red" %)Device will upload a packet if downlink code executes successfully.
890 -)))
892 +Device will upload a packet if downlink code executes successfully.
891 891  
892 892  
893 -==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
894 894  
896 +
897 +
898 +==== DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
899 +
895 895  * AT Command:
896 896  
897 897  There is no AT Command to control Digital Output
898 898  
904 +
899 899  * Downlink Payload (prefix 0xA9):
900 900  
901 -(% class="box infomessage" %)
902 -(((
903 -**0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
904 -)))
907 +0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control
905 905  
906 906  This is to control the digital output time of DO pin. Include four bytes:
907 907  
908 -(% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
911 +**First Byte:** Type code (0xA9)
909 909  
910 -(% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
913 +**Second Byte**: Inverter Mode
911 911  
912 912  01: DO pins will change back to original state after timeout.
913 913  
914 914  00: DO pins will change to an inverter state after timeout 
915 915  
916 -(% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
917 917  
918 -[[image:image-20220524093238-6.png]]
920 +**Third Byte**: Control Method and Ports status:
919 919  
920 -(% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
922 +(% border="1" style="background-color:#f7faff" %)
923 +|Second Byte|Status
924 +|0x01|DO1 set to low
925 +|0x00|DO1 set to high
926 +|0x11|DO1 NO Action
921 921  
922 -[[image:image-20220524093328-7.png]]
928 +**Fourth Byte**: Control Method and Ports status:
923 923  
924 -(% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
930 +(% border="1" style="background-color:#f7faff" %)
931 +|Second Byte|Status
932 +|0x01|DO2 set to low
933 +|0x00|DO2 set to high
934 +|0x11|DO2 NO Action
925 925  
926 -[[image:image-20220524093351-8.png]]
936 +**Fifth Byte**: Control Method and Ports status:
927 927  
928 -(% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
938 +(% border="1" style="background-color:#f7faff" %)
939 +|Second Byte|Status
940 +|0x01|DO3 set to low
941 +|0x00|DO3 set to high
942 +|0x11|DO3 NO Action
929 929  
944 +**Sixth and Seventh Byte**:
945 +
930 930   Latching time. Unit: ms
931 931  
932 932  Device will upload a packet if downlink code executes successfully.
933 933  
934 -**Example payload:**
935 935  
936 -**~1. A9 01 01 01 01 07 D0**
937 937  
952 +Example payload:
953 +
954 +1. A9 01 01 01 01 07 D0
955 +
938 938  DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
939 939  
940 -**2. A9 01 00 01 11 07 D0**
941 941  
959 +1. A9 01 00 01 11 07 D0
960 +
942 942  DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
943 943  
944 -**3. A9 00 00 00 00 07 D0**
945 945  
964 +1. A9 00 00 00 00 07 D0
965 +
946 946  DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
947 947  
948 -**4. A9 00 11 01 00 07 D0**
949 949  
969 +1. A9 00 11 01 00 07 D0
970 +
950 950  DO1 pin no action, DO2 pin set low, DO3 pin set high, last 2 seconds, then DO1 pin no action, DO2 pin set high, DO3 pin set low
951 951  
952 952  
953 -=== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
954 954  
975 +
976 +==== Relay ~-~- Control Relay Output RO1/RO2 ====
977 +
955 955  * AT Command:
956 956  
957 957  There is no AT Command to control Relay Output
958 958  
982 +
959 959  * Downlink Payload (prefix 0x03):
960 960  
961 -(% class="box infomessage" %)
962 -(((
963 -**0x03 aa bb     ~/~/ Set RO1/RO2 output**
964 -)))
985 +0x03 aa bb     ~/~/ Set RO1/RO2 output
965 965  
966 -(((
967 967  If payload = 0x030100, it means set RO1 to close and RO2 to open.
968 -)))
969 969  
970 -(((
971 971  01: Close ,  00: Open , 11: No action
972 -)))
973 973  
974 -(((
975 -[[image:image-20220524093724-9.png]]
976 -)))
991 +(% border="1" style="background-color:#f7faff" %)
992 +|Downlink Code|RO1|RO2
993 +|03  00  11|Open|No Action
994 +|03  01  11|Close|No Action
995 +|03  11  00|No Action|Open
996 +|03  11  01|No Action|Close
997 +|03  00  00|Open|Open
998 +|03  01  01|Close|Close
999 +|03  01  00|Close|Open
1000 +|03  00  01|Open|Close
977 977  
978 978  Device will upload a packet if downlink code executes successfully.
979 979  
980 980  
981 -==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1005 +==== Relay ~-~- Control Relay Output RO1/RO2 with time control ====
982 982  
983 983  * AT Command:
984 984  
985 985  There is no AT Command to control Relay Output
986 986  
1011 +
987 987  * Downlink Payload (prefix 0x05):
988 988  
989 -(% class="box infomessage" %)
990 -(((
991 -**0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
992 -)))
1014 +0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:
993 993  
994 994  This is to control the relay output time of relay. Include four bytes:
995 995  
996 -(% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1018 +**First Byte:** Type code (0x05)
997 997  
998 -(% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1020 +**Second Byte(aa)**: Inverter Mode
999 999  
1000 1000  01: Relays will change back to original state after timeout.
1001 1001  
1002 1002  00: Relays will change to an inverter state after timeout
1003 1003  
1004 -(% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1005 1005  
1006 -[[image:image-20220524093831-10.png]]
1027 +**Third Byte(bb)**: Control Method and Ports status:
1007 1007  
1008 -(% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1029 +(% border="1" style="background-color:#f7faff" %)
1030 +|Value|Status
1031 +|0x11|RO1 and RO2 to NO
1032 +|0x10|RO2 to NO, RO1 to NC
1033 +|0x01|RO2 to NC, RO1 to NO
1034 +|0x00|RO1 and RO2 to NC.
1035 +|0x20|RO1 No Action, RO2 to NC
1036 +|0x21|RO1 No Action, RO2 to NO
1037 +|0x02|RO1 to NC, RO2 No Action
1038 +|0x12|RO1 to NO, RO2 No Action
1009 1009  
1040 +**Fourth / Fifth Bytes (cc)**: Latching time. Unit: ms
1041 +
1010 1010  Device will upload a packet if downlink code executes successfully.
1011 1011  
1044 +
1045 +
1012 1012  **Example payload:**
1013 1013  
1014 -**~1. 05 01 11 07 D0**
1048 +1. 05 01 11 07 D0
1015 1015  
1016 1016  Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1017 1017  
1018 -**2. 05 01 10 07 D0**
1019 1019  
1053 +1. 05 01 10 07 D0
1054 +
1020 1020  Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1021 1021  
1022 -**3. 05 00 01 07 D0**
1023 1023  
1058 +1. 05 00 01 07 D0
1059 +
1024 1024  Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1025 1025  
1026 -**4. 05 00 00 07 D0**
1027 1027  
1063 +1. 05 00 00 07 D0
1064 +
1028 1028  Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1029 1029  
1030 1030  
1031 -==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1032 1032  
1033 -When voltage exceed the threshold, count. Feature see [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]
1034 1034  
1070 +
1071 +
1072 +==== Counting ~-~- Voltage threshold counting ====
1073 +
1074 +When voltage exceed the threshold, count. Feature see [[MOD4>>path:#MOD4]]
1075 +
1035 1035  * AT Command:
1036 1036  
1037 -(% class="box infomessage" %)
1038 -(((
1039 -**AT+VOLMAX    ~/~/ See [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]**
1040 -)))
1078 +AT+VOLMAX    ~/~/ See [[MOD4>>path:#MOD4]]
1041 1041  
1080 +
1042 1042  * Downlink Payload (prefix 0xA5):
1043 1043  
1044 -(% class="box infomessage" %)
1045 -(((
1046 -**0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1047 -)))
1083 +0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc
1048 1048  
1049 -==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1050 1050  
1086 +==== Counting ~-~- Pre-configure the Count Number ====
1087 +
1051 1051  * AT Command:
1052 1052  
1053 -(% class="box infomessage" %)
1054 -(((
1055 -**AT+SETCNT=aa,(bb cc dd ee) **
1056 -)))
1090 +AT+SETCNT=aa,(bb cc dd ee)
1057 1057  
1058 1058  aa: 1: Set count1,
1059 1059  
... ... @@ -1063,109 +1063,115 @@
1063 1063  
1064 1064  Bb cc dd ee: number to be set
1065 1065  
1100 +
1066 1066  * Downlink Payload (prefix 0xA8):
1067 1067  
1068 -(% class="box infomessage" %)
1069 -(((
1070 -**0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1071 -)))
1103 +0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1072 1072  
1073 -==== 3.4.2.18 Counting ~-~- Clear Counting ====
1074 1074  
1106 +
1107 +
1108 +
1109 +==== Counting ~-~- Clear Counting ====
1110 +
1075 1075  Clear counting for counting mode
1076 1076  
1077 1077  * AT Command:
1078 1078  
1079 -(% class="box infomessage" %)
1080 -(((
1081 -**AT+CLRCOUNT ~/~/ clear all counting**
1082 -)))
1115 +AT+CLRCOUNT ~/~/ clear all counting
1083 1083  
1117 +
1084 1084  * Downlink Payload (prefix 0xA6):
1085 1085  
1086 -(% class="box infomessage" %)
1087 -(((
1088 -**0x A6 01     ~/~/ clear all counting,**
1089 -)))
1120 +0x A6 01     ~/~/ clear all counting,
1090 1090  
1091 -==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1092 1092  
1123 +
1124 +
1125 +==== Counting ~-~- Change counting mode save time ====
1126 +
1093 1093  * AT Command:
1094 1094  
1095 -(% class="box infomessage" %)
1096 -(((
1097 -**AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1098 -)))
1129 +AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)
1099 1099  
1131 +
1100 1100  * Downlink Payload (prefix 0xA7):
1101 1101  
1102 -(% class="box infomessage" %)
1103 -(((
1104 -**0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1105 -)))
1134 +0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,
1106 1106  
1107 1107  range: aa bb cc:0 to 16777215,  (unit:second)
1108 1108  
1109 -== 3.5 Integrate with Mydevice ==
1110 1110  
1139 +
1140 +
1141 +1.
1142 +11. Integrate with Mydevice
1143 +
1111 1111  Mydevices provides a human friendly interface to show the sensor data, once we have data in TTN, we can use Mydevices to connect to TTN and see the data in Mydevices. Below are the steps:
1112 1112  
1113 -**Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1114 1114  
1115 -**Step 2**: To configure the Application to forward data to Mydevices you will need to add integration. To add the Mydevices integration, perform the following steps:
1147 +Step 1: Be sure that your device is programmed and properly connected to the network at this time.
1116 1116  
1117 -[[image:1653356737703-362.png||height="232" width="732"]]
1149 +Step 2: To configure the Application to forward data to Mydevices you will need to add integration. To add the Mydevices integration, perform the following steps:
1118 1118  
1119 -[[image:image-20220524094641-11.png||height="390" width="723"]]
1120 1120  
1152 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image010.png]]
1121 1121  
1122 -[[image:image-20220524094641-12.png||height="402" width="718"]]
1123 1123  
1124 -**Step 3**: Create an account or log in Mydevices.
1155 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image011.png]]
1125 1125  
1126 -**Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1127 1127  
1158 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image012.png]]
1159 +
1160 +
1161 +
1162 +Step 3: Create an account or log in Mydevices.
1163 +
1164 +Step 4: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.
1165 +
1128 1128  Search under The things network
1129 1129  
1130 -[[image:1653356838789-523.png||height="337" width="740"]]
1168 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image013.png]]
1131 1131  
1170 +
1132 1132  After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1133 1133  
1134 -[[image:image-20220524094909-1.png||height="335" width="729"]]
1173 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image014.png]]
1135 1135  
1136 -[[image:image-20220524094909-2.png||height="337" width="729"]]
1137 1137  
1138 -[[image:image-20220524094909-3.png||height="338" width="727"]]
1176 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image015.png]]
1139 1139  
1140 -[[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1141 1141  
1142 -[[image:image-20220524094909-5.png||height="341" width="734"]]
1179 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image016.png]]
1143 1143  
1144 -== 3.6 Interface Detail ==
1145 1145  
1146 -=== 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1182 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image017.png]]
1147 1147  
1184 +
1185 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image018.png]]
1186 +
1187 +
1188 +1.
1189 +11. Interface Detail
1190 +111. Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active )
1191 +
1148 1148  Support NPN Type sensor
1149 1149  
1150 -[[image:1653356991268-289.png]]
1194 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image019.png]]
1151 1151  
1152 -=== 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1153 1153  
1154 -(((
1197 +
1198 +1.
1199 +11.
1200 +111. Digital Input Port: DI1/DI2 ( For LT-22222-L)
1201 +
1155 1155  The DI port of LT-22222-L can support NPN or PNP output sensor.
1156 -)))
1157 1157  
1158 -(((
1159 -(((
1160 1160  Internal circuit as below, the NEC2501 is a photocoupler, the Active current (from NEC2501 pin 1 to pin 2 is 1ma and the max current is 50mA. When there is active current pass NEC2501 pin1 to pin2. The DI will be active high
1161 -)))
1162 -)))
1163 1163  
1164 -[[image:1653357170703-587.png]]
1206 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image020.png]]
1165 1165  
1166 -(((
1167 1167  When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1168 -)))
1169 1169  
1170 1170  
1171 1171  **Example1**: Connect to a Low active sensor.
... ... @@ -1175,11 +1175,11 @@
1175 1175  * Connect sensor’s output to DI1-
1176 1176  * Connect sensor’s VCC to DI1+.
1177 1177  
1178 -So when sensor active, the current between NEC2501 pin1 and pin2 is： ​​
1218 +So when sensor active, the current between NEC2501 pin1 and pin2 is:
1179 1179  
1180 - //IF// = DI1+ / 1K.
1220 + //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1181 1181  
1182 -If DI1+ = 12v, the //IF// = 12mA , So the LT-22222-L will be able to detect this active signal.
1222 +If DI1+ = 12v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 12mA , So the LT-22222-L will be able to detect this active signal.
1183 1183  
1184 1184  
1185 1185  **Example2**: Connect to a High active sensor.
... ... @@ -1191,12 +1191,12 @@
1191 1191  
1192 1192  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1193 1193  
1194 -[[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]** [[image:image-20220524095628-8.png]]= DI1+ / 1K.**
1234 + //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1195 1195  
1196 -If **DI1+ = 24v**, the [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**[[image:image-20220524095628-8.png]]** = 24mA , So the LT-22222-L will be able to detect this high active signal.
1236 +If DI1+ = 24v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 24mA , So the LT-22222-L will be able to detect this high active signal.
1197 1197  
1198 1198  
1199 -**Example3**: Connect to a 220v high active sensor.
1239 +**Example3**: Connect to a 220v high active sensor.公司测试一下
1200 1200  
1201 1201  Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1202 1202  
... ... @@ -1205,24 +1205,34 @@
1205 1205  
1206 1206  So when sensor active, the current between NEC2501 pin1 and pin2 is:
1207 1207  
1208 - [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**[[image:image-20220524095628-8.png]] = DI1+ / 51K.**
1248 + //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 51K.
1209 1209  
1210 -If sensor output is 220v, the (% id="cke_bm_243359S" style="display:none" %)[[image:image-20220524095628-8.png]](%%) = DI1+ / 51K.  = 4.3mA , So the LT-22222-L will be able to detect this high active signal safely.
1250 +If sensor output is 220v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 4.3mA , So the LT-22222-L will be able to detect this high active signal safely.
1211 1211  
1212 -=== 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1213 1213  
1253 +1.
1254 +11.
1255 +111. Digital Output Port: DO1/DO2 /DO3
1256 +
1214 1214  NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1215 1215  
1216 -[[image:1653357531600-905.png]]
1259 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
1217 1217  
1218 -=== 3.6.4 Analog Input Interface ===
1219 1219  
1262 +
1263 +
1264 +1.
1265 +11.
1266 +111. Analog Input Interface
1267 +
1220 1220  The analog input interface is as below. The LT will measure the IN2 voltage so to calculate the current pass the Load. The formula is:
1221 1221  
1222 -**AC2 = (IN2 voltage )/12**
1270 +AC2 = (IN2 voltage )/12
1223 1223  
1224 -[[image:1653357592296-182.png]]
1272 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
1225 1225  
1274 +
1275 +
1226 1226  Example to connect a 4~~20mA sensor
1227 1227  
1228 1228  We take the wind speed sensor as an example for reference only.
... ... @@ -1238,579 +1238,423 @@
1238 1238  
1239 1239  Connection diagram:
1240 1240  
1241 -[[image:1653357640609-758.png]]
1291 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.jpg]]
1242 1242  
1243 -[[image:1653357648330-671.png||height="155" width="733"]]
1293 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
1244 1244  
1245 -=== 3.6.5 Relay Output ===
1246 1246  
1247 -(((
1296 +
1297 +1.
1298 +11.
1299 +111. Relay Output
1300 +
1248 1248  The LT serial controller has two relay interfaces; each interface uses two pins of the screw terminal. User can connect other device’s Power Line to in serial of RO1_1 and RO_2. Such as below:
1249 -)))
1250 1250  
1251 -[[image:image-20220524100215-9.png]]
1303 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
1252 1252  
1253 -[[image:image-20220524100215-10.png||height="382" width="723"]]
1254 1254  
1255 -== 3.7 LEDs Indicators ==
1306 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
1256 1256  
1257 -[[image:image-20220524100748-11.png]]
1258 1258  
1259 -= 4. Use AT Command =
1260 1260  
1261 -== 4.1 Access AT Command ==
1262 1262  
1311 +
1312 +1.
1313 +11. LEDs Indicators
1314 +
1315 +(% border="1" style="background-color:#f7faff" %)
1316 +|**LEDs**|**Feature**
1317 +|**PWR**|Always on if there is power
1318 +|**SYS**|After device is powered on, the SYS will **fast blink in GREEN** for 5 times, means RS485-LN start to join LoRaWAN network. If join success, SYS will be **on GREEN for 5 seconds. **SYS will **blink Blue** on every upload and **blink Green** once receive a downlink message.
1319 +|**TX**|(((
1320 +Device boot: TX blinks 5 times.
1321 +
1322 +Successful join network: TX ON for 5 seconds.
1323 +
1324 +Transmit a LoRa packet: TX blinks once
1325 +)))
1326 +|**RX**|RX blinks once when receive a packet.
1327 +|**DO1**|
1328 +|**DO2**|
1329 +|**DO3**|
1330 +|**DI2**|(((
1331 +For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1332 +
1333 +For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1334 +)))
1335 +|**DI2**|(((
1336 +For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1337 +
1338 +For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1339 +)))
1340 +|**DI3**|For LT-33222-L ONLY: ON when DI3 is low, LOW when DI3 is high
1341 +|**DI2**|(((
1342 +For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1343 +
1344 +For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1345 +)))
1346 +|**RO1**|
1347 +|**RO2**|
1348 +
1349 +1. Use AT Command
1350 +11. Access AT Command
1351 +
1263 1263  LT supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to LT for using AT command, as below.
1264 1264  
1265 -[[image:1653358238933-385.png]]
1354 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1266 1266  
1267 -In PC, User needs to set (% style="color:#4f81bd" %)**serial tool**(%%)(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600**(%%) to access to access serial console for LT. The AT commands are disable by default and need to enter password (default:(% style="color:green" %)**123456**)(%%) to active it. As shown below:
1268 1268  
1269 -[[image:1653358355238-883.png]]
1357 +In PC, User needs to set **serial tool**(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to **9600** to access to access serial console for LT. The AT commands are disable by default and need to enter password (default:**123456**) to active it. As shown below:
1270 1270  
1359 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]
1360 +
1361 +
1271 1271  More detail AT Command manual can be found at [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1272 1272  
1273 -(((
1274 1274  AT+<CMD>?        : Help on <CMD>
1275 -)))
1276 1276  
1277 -(((
1278 1278  AT+<CMD>         : Run <CMD>
1279 -)))
1280 1280  
1281 -(((
1282 1282  AT+<CMD>=<value> : Set the value
1283 -)))
1284 1284  
1285 -(((
1286 1286  AT+<CMD>=?       : Get the value
1287 -)))
1288 1288  
1289 -(((
1290 1290  ATZ: Trig a reset of the MCU
1291 -)))
1292 1292  
1293 -(((
1294 1294  AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1295 -)))
1296 1296  
1297 -(((
1298 1298  AT+DEUI: Get or Set the Device EUI
1299 -)))
1300 1300  
1301 -(((
1302 1302  AT+DADDR: Get or Set the Device Address
1303 -)))
1304 1304  
1305 -(((
1306 1306  AT+APPKEY: Get or Set the Application Key
1307 -)))
1308 1308  
1309 -(((
1310 1310  AT+NWKSKEY: Get or Set the Network Session Key
1311 -)))
1312 1312  
1313 -(((
1314 1314  AT+APPSKEY: Get or Set the Application Session Key
1315 -)))
1316 1316  
1317 -(((
1318 1318  AT+APPEUI: Get or Set the Application EUI
1319 -)))
1320 1320  
1321 -(((
1322 1322  AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1323 -)))
1324 1324  
1325 -(((
1326 1326  AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1327 -)))
1328 1328  
1329 -(((
1330 1330  AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1331 -)))
1332 1332  
1333 -(((
1334 1334  AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1335 -)))
1336 1336  
1337 -(((
1338 1338  AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1339 -)))
1340 1340  
1341 -(((
1342 1342  AT+RX2FQ: Get or Set the Rx2 window frequency
1343 -)))
1344 1344  
1345 -(((
1346 1346  AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1347 -)))
1348 1348  
1349 -(((
1350 1350  AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1351 -)))
1352 1352  
1353 -(((
1354 1354  AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1355 -)))
1356 1356  
1357 -(((
1358 1358  AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1359 -)))
1360 1360  
1361 -(((
1362 1362  AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1363 -)))
1364 1364  
1365 -(((
1366 1366  AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1367 -)))
1368 1368  
1369 -(((
1370 1370  AT+NWKID: Get or Set the Network ID
1371 -)))
1372 1372  
1373 -(((
1374 1374  AT+FCU: Get or Set the Frame Counter Uplink
1375 -)))
1376 1376  
1377 -(((
1378 1378  AT+FCD: Get or Set the Frame Counter Downlink
1379 -)))
1380 1380  
1381 -(((
1382 1382  AT+CLASS: Get or Set the Device Class
1383 -)))
1384 1384  
1385 -(((
1386 1386  AT+JOIN: Join network
1387 -)))
1388 1388  
1389 -(((
1390 1390  AT+NJS: Get OTAA Join Status
1391 -)))
1392 1392  
1393 -(((
1394 1394  AT+SENDB: Send hexadecimal data along with the application port
1395 -)))
1396 1396  
1397 -(((
1398 1398  AT+SEND: Send text data along with the application port
1399 -)))
1400 1400  
1401 -(((
1402 1402  AT+RECVB: Print last received data in binary format (with hexadecimal values)
1403 -)))
1404 1404  
1405 -(((
1406 1406  AT+RECV: Print last received data in raw format
1407 -)))
1408 1408  
1409 -(((
1410 1410  AT+VER: Get current image version and Frequency Band
1411 -)))
1412 1412  
1413 -(((
1414 1414  AT+CFM: Get or Set the confirmation mode (0-1)
1415 -)))
1416 1416  
1417 -(((
1418 1418  AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1419 -)))
1420 1420  
1421 -(((
1422 1422  AT+SNR: Get the SNR of the last received packet
1423 -)))
1424 1424  
1425 -(((
1426 1426  AT+RSSI: Get the RSSI of the last received packet
1427 -)))
1428 1428  
1429 -(((
1430 1430  AT+TDC: Get or set the application data transmission interval in ms
1431 -)))
1432 1432  
1433 -(((
1434 1434  AT+PORT: Get or set the application port
1435 -)))
1436 1436  
1437 -(((
1438 1438  AT+DISAT: Disable AT commands
1439 -)))
1440 1440  
1441 -(((
1442 1442  AT+PWORD: Set password, max 9 digits
1443 -)))
1444 1444  
1445 -(((
1446 1446  AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1447 -)))
1448 1448  
1449 -(((
1450 1450  AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1451 -)))
1452 1452  
1453 -(((
1454 1454  AT+CFG: Print all settings
1455 -)))
1456 1456  
1457 -== 4.2 Common AT Command Sequence ==
1458 1458  
1459 -=== 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1460 1460  
1461 -(((
1458 +1.
1459 +11. Common AT Command Sequence
1460 +111. Multi-channel ABP mode (Use with SX1301/LG308)
1461 +
1462 1462  If device has not joined network yet:
1463 -)))
1464 1464  
1465 -(((
1466 -(% style="background-color:#dcdcdc" %)123456
1467 -)))
1464 +123456
1468 1468  
1469 -(((
1470 -(% style="background-color:#dcdcdc" %)AT+FDR
1471 -)))
1466 +AT+FDR
1472 1472  
1473 -(((
1474 -(% style="background-color:#dcdcdc" %)123456
1475 -)))
1468 +123456
1476 1476  
1477 -(((
1478 -(% style="background-color:#dcdcdc" %)AT+NJM=0
1479 -)))
1470 +AT+NJM=0
1480 1480  
1481 -(((
1482 -(% style="background-color:#dcdcdc" %)ATZ
1483 -)))
1472 +ATZ
1484 1484  
1485 1485  
1486 -(((
1487 1487  If device already joined network:
1488 -)))
1489 1489  
1490 -(((
1491 -(% style="background-color:#dcdcdc" %)AT+NJM=0
1492 -)))
1477 +AT+NJM=0
1493 1493  
1494 -(((
1495 -(% style="background-color:#dcdcdc" %)ATZ
1496 -)))
1479 +ATZ
1497 1497  
1498 -=== 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1481 +1.
1482 +11.
1483 +111. Single-channel ABP mode (Use with LG01/LG02)
1499 1499  
1500 -(((
1501 -(% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1502 -)))
1485 +123456   Enter Password to have AT access.
1503 1503  
1504 -(((
1505 -(% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1506 -)))
1487 +AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1507 1507  
1508 -(((
1509 -(% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1510 -)))
1489 +123456   Enter Password to have AT access.
1511 1511  
1512 -(((
1513 -(% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1514 -)))
1491 +AT+CLASS=C Set to work in CLASS C
1515 1515  
1516 -(((
1517 -(% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1518 -)))
1493 +AT+NJM=0 Set to ABP mode
1519 1519  
1520 -(((
1521 -(% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1522 -)))
1495 +AT+ADR=0 Set the Adaptive Data Rate Off
1523 1523  
1524 -(((
1525 -(% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1526 -)))
1497 +AT+DR=5  Set Data Rate
1527 1527  
1528 -(((
1529 -(% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1530 -)))
1499 +AT+TDC=60000  Set transmit interval to 60 seconds
1531 1531  
1532 -(((
1533 -(% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1534 -)))
1501 +AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1535 1535  
1536 -(((
1537 -(% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1538 -)))
1503 +AT+RX2FQ=868400000 Set RX2Frequency to 868.4Mhz (according to the result from server)
1539 1539  
1540 -(((
1541 -(% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1542 -)))
1505 +AT+RX2DR=5  Set RX2DR to match the downlink DR from server. see below
1543 1543  
1544 -(((
1545 -(% style="background-color:#dcdcdc" %) AT+DADDR=26 01 1A F1 (%%)Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
1546 -)))
1507 +AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
1547 1547  
1548 -(((
1549 -(% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1550 -)))
1509 +ATZ          Reset MCU
1551 1551  
1552 -(((
1553 -(% style="color:red" %)**Note:**
1554 -)))
1511 +**Note:**
1555 1555  
1556 -(((
1557 -(% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1558 -2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1559 -3. Make sure SF / bandwidth setting in LG01/LG02 match the settings of AT+DR. refer [[this link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.
1560 -4. The command AT+RX2FQ and AT+RX2DR is to let downlink work. to set the correct parameters, user can check the actually downlink parameters to be used. As below. Which shows the RX2FQ should use 868400000 and RX2DR should be 5
1561 -)))
1513 +1. Make sure the device is set to ABP mode in the IoT Server.
1514 +1. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1515 +1. Make sure SF / bandwidth setting in LG01/LG02 match the settings of AT+DR. refer [[this link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.
1516 +1. The command AT+RX2FQ and AT+RX2DR is to let downlink work. to set the correct parameters, user can check the actually downlink parameters to be used. As below. Which shows the RX2FQ should use 868400000 and RX2DR should be 5
1562 1562  
1563 -(((
1564 -[[image:1653359097980-169.png||height="188" width="729"]]
1565 -)))
1518 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image031.png]]
1566 1566  
1567 -(((
1568 -
1569 -)))
1570 1570  
1571 -=== 4.2.3 Change to Class A ===
1521 +1.
1522 +11.
1523 +111. Change to Class A
1572 1572  
1573 1573  If sensor JOINED
1574 -(% style="background-color:#dcdcdc" %)AT+CLASS=A
1526 +
1527 +AT+CLASS=A
1528 +
1575 1575  ATZ
1576 1576  
1577 -= 5. FAQ =
1578 1578  
1579 -== 5.1 How to upgrade the image? ==
1580 1580  
1533 +
1534 +
1535 +1. FAQ
1536 +
1537 +1.
1538 +11. How to upgrade the image?
1539 +
1581 1581  The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1582 1582  
1583 1583  * Support new features
1584 1584  * For bug fix
1585 1585  * Change LoRaWAN bands.
1545 +
1586 1586  Below shows the hardware connection for how to upload an image to the LT:
1587 -* [[image:1653359603330-121.png]]
1588 1588  
1548 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1549 +
1550 +
1589 1589  **Step1:** Download [[flash loader>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html]].
1552 +
1590 1590  **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1554 +
1591 1591  **Step3: **Open flashloader; choose the correct COM port to update.
1592 -**For LT-22222-L**:
1593 -Hold down the PRO button and then momentarily press the RST reset button and the **DO1 led** will change from OFF to ON. When **DO1 LED** is on, it means the device is in download mode.
1594 1594  
1595 - [[image:image-20220524103407-12.png]]
1557 +**For LT-33222-L**:
1596 1596  
1597 -[[image:image-20220524103429-13.png]]
1559 +Hold down the PRO button and then momentarily press the RST reset button and the **DO2 led** will change from OFF to ON. When **DO2 LED** is on, it means the device is in download mode.
1598 1598  
1599 -[[image:image-20220524104033-15.png]]
1561 +**For LT-22222-L**:
1600 1600  
1601 -(% style="color:red" %)**Notice**(%%): In case user has lost the program cable. User can hand made one from a 3.5mm cable. The pin mapping is:
1563 +Hold down the PRO button and then momentarily press the RST reset button and the **DO1 led** will change from OFF to ON. When **DO1 LED** is on, it means the device is in download mode.
1602 1602  
1603 -[[image:1653360054704-518.png||height="186" width="745"]]
1604 1604  
1605 -(((
1606 -(((
1607 -== 5.2 How to change the LoRa Frequency Bands/Region? ==
1608 -)))
1609 -)))
1610 1610  
1611 -(((
1612 -User can follow the introduction for [[how to upgrade image>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H5.1Howtoupgradetheimage3F]]. When download the images, choose the required image file for download.
1567 +|(((
1568 +Board detected
1613 1613  )))
1614 1614  
1615 -(((
1616 -== 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1571 +|(((
1572 +
1617 1617  )))
1618 1618  
1619 -(((
1620 -(((
1575 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image032.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image033.png]]
1576 +
1577 +
1578 +
1579 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image034.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image035.png]]
1580 +
1581 +
1582 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image036.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image037.png]]
1583 +
1584 +
1585 +**Notice**: In case user has lost the program cable. User can hand made one from a 3.5mm cable. The pin mapping is:
1586 +
1587 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image038.png]]
1588 +
1589 +
1590 +1.
1591 +11. How to change the LoRa Frequency Bands/Region?
1592 +
1593 +User can follow the introduction for [[how to upgrade image>>path:#upgrade_image]]. When download the images, choose the required image file for download.
1594 +
1595 +
1596 +1.
1597 +11. How to set up LT to work with Single Channel Gateway such as LG01/LG02?
1598 +
1621 1621  In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1622 -)))
1623 -)))
1624 1624  
1625 -(((
1626 -(((
1627 1627  Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1628 -)))
1629 -)))
1630 1630  
1631 -(((
1632 -(% style="color:#4f81bd" %)**Step1**(%%): Log in TTN, Create an ABP device in the application and input the network session key (NETSKEY), app session key (APPSKEY) from the device.
1633 -)))
1634 1634  
1635 -(((
1636 -[[image:1653360231087-571.png||height="401" width="727"]]
1637 -)))
1604 +**Step1**: Log in TTN, Create an ABP device in the application and input the network session key (NETSKEY), app session key (APPSKEY) from the device.
1638 1638  
1639 -(% style="color:red" %)Note: user just need to make sure above three keys match, User can change either in TTN or Device to make then match. In TTN, NETSKEY and APPSKEY can be configured by user in setting page, but Device Addr is generated by TTN.
1606 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image039.png]]
1640 1640  
1641 -(% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1608 +Note: user just need to make sure above three keys match, User can change either in TTN or Device to make then match. In TTN, NETSKEY and APPSKEY can be configured by user in setting page, but Device Addr is generated by TTN.
1642 1642  
1643 -(% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1644 -(% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1645 -(% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1646 -(% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1647 -(% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1648 -(% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1649 -(% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1650 -(% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1651 -(% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1652 -(% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1653 1653  
1611 +**Step2: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1612 +
1613 +123456   Enter Password to have AT access.
1614 +
1615 +AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1616 +
1617 +123456   Enter Password to have AT access.
1618 +
1619 +AT+NJM=0 Set to ABP mode
1620 +
1621 +AT+ADR=0 Set the Adaptive Data Rate Off
1622 +
1623 +AT+DR=5  Set Data Rate (Set AT+DR=3 for 915 band)
1624 +
1625 +AT+TDC=60000  Set transmit interval to 60 seconds
1626 +
1627 +AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1628 +
1629 +AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1
1630 +
1631 +ATZ                Reset MCU
1632 +
1654 1654  As shown in below:
1655 1655  
1656 -[[image:1653360498588-932.png||height="485" width="726"]]
1635 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image040.png]]
1657 1657  
1658 -== 5.4 Can I see counting event in Serial? ==
1659 1659  
1660 -(((
1638 +
1639 +1.
1640 +11. Can I see counting event in Serial?
1641 +
1661 1661  User can run AT+DEBUG command to see the counting event in serial. If firmware too old and doesn’t support AT+DEBUG. User can update to latest firmware first.
1662 -)))
1663 1663  
1664 -(((
1665 -= 6. Trouble Shooting =
1666 -)))
1667 1667  
1668 -(((
1669 -(((
1670 -== 6.1 Downlink doesn’t work, how to solve it? ==
1671 -)))
1672 -)))
1673 1673  
1674 -(((
1675 -Please see this link for how to debug:
1676 1676  
1677 -[[http:~~/~~/8.211.40.43:8080/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/>>http://8.211.40.43:8080/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/]]
1678 -)))
1647 +1. Trouble Shooting     
1648 +11. Downlink doesn’t work, how to solve it?
1679 1679  
1680 -(((
1650 +Please see this link for how to debug:
1651 +
1681 1681  [[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#How_it_work>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#How_it_work]]
1682 -)))
1683 1683  
1684 -(((
1685 -== 6.2 Have trouble to upload image. ==
1686 -)))
1687 1687  
1688 -(((
1655 +1.
1656 +11. Have trouble to upload image.
1657 +
1689 1689  See this link for trouble shooting:
1690 -)))
1691 1691  
1692 -(((
1693 1693  [[http:~~/~~/wiki.dragino.com/index.php?title=Firmware_Upgrade_Trouble_Shooting#UART_upgrade_trouble_shooting>>url:http://wiki.dragino.com/index.php?title=Firmware_Upgrade_Trouble_Shooting#UART_upgrade_trouble_shooting]]
1694 -)))
1695 1695  
1696 -(((
1697 -== 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1698 -)))
1699 1699  
1700 -(((
1663 +1.
1664 +11. Why I can’t join TTN in US915 /AU915 bands?
1665 +
1701 1701  It might be about the channels mapping. Please see this link for detail:
1702 -)))
1703 1703  
1704 -(((
1705 1705  [[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band]]
1706 -)))
1707 1707  
1708 -(((
1709 -= 7. Order Info =
1710 -)))
1711 1711  
1712 -(((
1713 -(((
1714 -(% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1715 -)))
1716 -)))
1717 1717  
1718 -(((
1719 -(((
1720 -(% style="color:#4f81bd" %)**XXX:**
1721 -)))
1722 -)))
1723 1723  
1724 -* (((
1725 -(% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1726 -)))
1727 -* (((
1728 -(% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1729 -)))
1730 -* (((
1731 -(% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1732 -)))
1733 -* (((
1734 -(% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1735 -)))
1736 -* (((
1737 -(% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1738 -)))
1739 -* (((
1740 -(% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1741 -)))
1742 -* (((
1743 -(% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1744 -)))
1745 -* (((
1746 -(% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1747 -)))
1673 +1. Order Info
1748 1748  
1749 -(((
1750 -* (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1675 +**For LT-33222-L-XXX or LT-22222-L-XXX:**
1751 1751  
1752 -= 8. Packing Info =
1753 -)))
1677 +**XXX:**
1754 1754  
1755 -(((
1756 -(((
1679 +* **EU433**: LT with frequency bands EU433
1680 +* **EU868**: LT with frequency bands EU868
1681 +* **KR920**: LT with frequency bands KR920
1682 +* **CN470**: LT with frequency bands CN470
1683 +* **AS923**: LT with frequency bands AS923
1684 +* **AU915**: LT with frequency bands AU915
1685 +* **US915**: LT with frequency bands US915
1686 +* **IN865**: LT with frequency bands IN865
1687 +* **CN779**: LT with frequency bands CN779
1688 +
1689 +1. Packing Info
1690 +
1757 1757  **Package Includes**:
1758 -)))
1759 -)))
1760 1760  
1761 -(((
1762 -(((
1763 -* LT-22222-L I/O Controller x 1
1693 +* LT I/O Controller x 1
1764 1764  * Stick Antenna for LoRa RF part x 1
1765 1765  * Bracket for controller x1
1766 1766  * Program cable x 1
1767 -)))
1768 -)))
1769 1769  
1770 -(((
1771 -(((
1772 1772  **Dimension and weight**:
1773 -)))
1774 -)))
1775 1775  
1776 -(((
1777 -(((
1778 1778  * Device Size: 13.5 x 7 x 3 cm
1779 1779  * Device Weight: 105g
1780 1780  * Package Size / pcs : 14.5 x 8 x 5 cm
1781 1781  * Weight / pcs : 170g
1782 -)))
1783 -)))
1784 1784  
1785 -(((
1786 -= 9. Support =
1787 -)))
1705 +1. Support
1788 1788  
1789 -* (((
1790 -(((
1791 -Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
1792 -)))
1793 -)))
1794 -* (((
1795 -(((
1796 -Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to
1797 -)))
1798 -)))
1707 +* Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.
1708 +* Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to
1799 1799  
1800 -(((
1801 -(((
1802 - [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
1803 -)))
1804 -
1805 -(((
1806 -= 10. Reference​​​​​ =
1807 -
1808 -* Product Page:
1809 -
1810 -LT-22222-L: [[http:~~/~~/www.dragino.com/products/lora-lorawan-end-node/item/156-lt-22222-l.html>>url:http://www.dragino.com/products/lora-lorawan-end-node/item/156-lt-22222-l.html]]
1811 -
1812 -* [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
1813 -* [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1814 -* [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
1815 -)))
1816 -)))
1710 +[[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
1653356737703-362.png
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