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Version 21.2 by Xiaoling on 2022/05/23 18:19
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1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
3
4 **LT-22222-L LoRa IO Controller User Manual **
5
6
7
8
9 = 1.Introduction =
10
11 == 1.1 What is LT Series I/O Controller ==
12
13 (((
14 The Dragino LT series I/O Modules are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as: analog current Input, analog voltage input, relay output, digital input and digital output etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
15 )))
16
17 (((
18 The LT I/O Controllers allows the user to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.
19 )))
20
21 (((
22 The LT I/O Controllers is aiming to provide a simple plug and play, low cost installation by using LoRaWAN wireless technology.
23 )))
24
25 (((
26 The use environment includes:
27 )))
28
29 (((
30 1) If user’s area has LoRaWAN service coverage, they can just install the I/O controller and configure it to connect the LoRaWAN provider via wireless.
31 )))
32
33 (((
34 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
35 )))
36
37 (((
38 [[image:1653295757274-912.png]]
39 )))
40
41 == 1.2  Specifications ==
42
43 **Hardware System:**
44
45 * STM32L072CZT6 MCU
46 * SX1276/78 Wireless Chip 
47 * Power Consumption:
48 ** Idle: 4mA@12v
49 ** 20dB Transmit: 34mA@12v
50
51 **Interface for Model: LT22222-L:**
52
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. 
59
60 **LoRa Spec:**
61
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.
80
81 == 1.3 Features ==
82
83 * LoRaWAN Class A & Class C protocol
84 * Optional Customized LoRa Protocol
85 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
86 * AT Commands to change parameters
87 * Remote configure parameters via LoRa Downlink
88 * Firmware upgradable via program port
89 * Counting
90
91 == 1.4  Applications ==
92
93 * Smart Buildings & Home Automation
94 * Logistics and Supply Chain Management
95 * Smart Metering
96 * Smart Agriculture
97 * Smart Cities
98 * Smart Factory
99
100 == 1.5 Hardware Variants ==
101
102 (% border="1" style="background-color:#f7faff; width:500px" %)
103 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
104 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
105 * 2 x Digital Input (Bi-direction)
106 * 2 x Digital Output
107 * 2 x Relay Output (5A@250VAC / 30VDC)
108 * 2 x 0~~20mA Analog Input (res:0.01mA)
109 * 2 x 0~~30V Analog Input (res:0.01v)
110 * 1 x Counting Port
111 )))
112
113 = 2. Power ON Device =
114
115 The LT controller can be powered by 7 ~~ 24V DC power source. Connect VIN to Power Input V+ and GND to power input V- to power the LT controller.
116
117 (((
118 PWR will on when device is properly powered.
119 )))
120
121 [[image:1653297104069-180.png]]
122
123 = 3. Operation Mode =
124
125 == 3.1 How it works? ==
126
127 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. 
128
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.
130
131 3.2 Example to join LoRaWAN network
132
133 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. 
134
135 [[image:image-20220523172350-1.png||height="266" width="864"]]
136
137
138 (((
139 The LG308 is already set to connect to [[TTN network >>url:https://www.thethingsnetwork.org/]]. So what we need to do now is only configure register this device to TTN:
140 )))
141
142 (((
143 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
144 )))
145
146 (((
147 Each LT is shipped with a sticker with the default device EUI as below:
148 )))
149
150 [[image:1653297924498-393.png]]
151
152 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
153
154 Add APP EUI in the application.
155
156 [[image:1653297955910-247.png||height="321" width="716"]]
157
158 Add APP KEY and DEV EUI
159
160 [[image:1653298023685-319.png]]
161
162 (((
163 **Step 2**: Power on LT and it will auto join to the TTN network. After join success, it will start to upload message to TTN and user can see in the panel.
164 )))
165
166 [[image:1653298044601-602.png||height="405" width="709"]]
167
168 == 3.3 Uplink Payload ==
169
170 There are five working modes + one interrupt mode on LT for different type application:
171
172 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
173 * **MOD2**: Double DI Counting + DO + RO
174 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
175 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
176 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
177 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
178
179 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
180
181 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
182
183 [[image:image-20220523174024-3.png]]
184
185 (((
186 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
187 )))
188
189 [[image:image-20220523174254-4.png]]
190
191 * RO is for relay. ROx=1 : close，ROx=0 always open.
192 * DI is for digital input. DIx=1: high or float, DIx=0: low.
193 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
194
195 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
196
197 For example if payload is: [[image:image-20220523175847-2.png]]
198
199 **The value for the interface is:  **
200
201 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
202
203 AVI2 channel voltage is 0x04AC/1000=1.196V
204
205 ACI1 channel current is 0x1310/1000=4.880mA
206
207 ACI2 channel current is 0x1300/1000=4.864mA
208
209 The last byte 0xAA= 10101010(B) means
210
211 * [1] RO1 relay channel is close and the RO1 LED is ON.
212 * [0] RO2 relay channel is open and RO2 LED is OFF;
213
214 **LT22222-L:**
215
216 * [1] DI2 channel is high input and DI2 LED is ON;
217 * [0] DI1 channel is low input;
218
219 * [0] DO3 channel output state
220 ** DO3 is float in case no load between DO3 and V+.;
221 ** DO3 is high in case there is load between DO3 and V+.
222 ** DO3 LED is off in both case
223 * [1] DO2 channel output is low and DO2 LED is ON.
224 * [0] DO1 channel output state
225 ** DO1 is float in case no load between DO1 and V+.;
226 ** DO1 is high in case there is load between DO1 and V+.
227 ** DO1 LED is off in both case
228
229 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
230
231 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
232
233 Total : 11 bytes payload
234
235 [[image:image-20220523180452-3.png]]
236
237 (((
238 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
239 )))
240
241 [[image:image-20220523180506-4.png]]
242
243 * RO is for relay. ROx=1 : close，ROx=0 always open.
244 * FIRST: Indicate this is the first packet after join network.
245 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
246
247 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
248
249 **To use counting mode, please run:**
250
251 (% class="box infomessage" %)
252 (((
253 **AT+MOD=2**
254 )))
255
256 (% class="box infomessage" %)
257 (((
258 **ATZ**
259 )))
260
261 (% style="color:#4f81bd" %)**AT Commands for counting:**
262
263 **For LT22222-L:**
264
265 (% class="box infomessage" %)
266 (((
267 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
268 )))
269
270 (% class="box infomessage" %)
271 (((
272 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
273 )))
274
275 (% class="box infomessage" %)
276 (((
277 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
278 )))
279
280 (% class="box infomessage" %)
281 (((
282 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
283 )))
284
285 (% class="box infomessage" %)
286 (((
287 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
288 )))
289
290 (% class="box infomessage" %)
291 (((
292 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
293 )))
294
295 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
296
297 **LT22222-L**: This mode the DI1 is used as a counting pin.
298
299 [[image:image-20220523181246-5.png]]
300
301 (((
302 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
303 )))
304
305 [[image:image-20220523181301-6.png]]
306
307 * RO is for relay. ROx=1 : close，ROx=0 always open.
308 * FIRST: Indicate this is the first packet after join network.
309 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
310
311 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
312
313 **To use counting mode, please run:**
314
315 (% class="box infomessage" %)
316 (((
317 **AT+MOD=3**
318 )))
319
320 (% class="box infomessage" %)
321 (((
322 **ATZ**
323 )))
324
325 Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
326
327 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
328
329 **LT22222-L**: This mode the DI1 is used as a counting pin.
330
331 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.
332
333
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
338 (((
339 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
340 )))
341
342 [[image:image-20220523181727-7.png]]
343
344 * RO is for relay. ROx=1 : close，ROx=0 always open.
345 * FIRST: Indicate this is the first packet after join network.
346 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
347
348 Note: DO3 is not valid for LT-22222-L.
349
350
351 To use this mode, please run:
352
353 AT+MOD=4
354
355 ATZ
356
357
358
359 Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
360
361 Plus below command for AVI1 Counting:
362
363 AT+SETCNT=3,60   (set AVI Count to 60)
364
365 AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)
366
367 AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)
368
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
379 **LT22222-L**: This mode the DI1 is used as a counting pin.
380
381
382 (% border="1" style="background-color:#f7faff" %)
383 |Size(bytes)|2|2|2|2|1|1|1
384 |Value|(((
385 AVI1
386
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
408 * RO is for relay. ROx=1 : close，ROx=0 always open.
409 * FIRST: Indicate this is the first packet after join network.
410 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
411
412 Note: DO3 is not valid for LT-22222-L.
413
414
415 To use this mode, please run:
416
417 AT+MOD=5
418
419 ATZ
420
421
422 Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
423
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
434 For example, if user has configured below commands:
435
436 * AT+MOD=1   à The normal working mode
437 * AT+ADDMOD6=1    à Enable trigger
438
439 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
440
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.**
443
444 **AT Command to set Trigger Condition**:
445
446 **Trigger base on voltage**:
447
448 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
449
450 Example:
451
452 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)
453
454 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
455
456
457 **Trigger base on current**:
458
459 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
460
461 Example:
462
463 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
464
465
466 **Trigger base on DI status**:
467
468 DI status trigger Flag.
469
470 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
471
472 Example:
473
474 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
475
476
477
478
479
480 **Downlink Command to set Trigger Condition**
481
482 Type Code: 0xAA. Downlink command same as AT Command [[AT+AVLIM, AT+ACLIM>>path:#AT_Trigger]]
483
484 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
485
486 AA: Code for this downlink Command:
487
488 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
489
490 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
491
492 yy2 yy2: AC1 or AV1 high limit.
493
494 yy3 yy3: AC2 or AV2 low limit.
495
496 Yy4 yy4: AC2 or AV2 high limit.
497
498
499 Example1: AA 00 13 88 00 00 00 00 00 00
500
501 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
502
503 Example2: AA 02 01 00
504
505 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
506
507
508
509
510 **Trigger Settings Payload Explanation:**
511
512 MOD6 Payload : total 11 bytes payload
513
514 (% border="1" style="background-color:#f7faff" %)
515 |Size(bytes)|1|1|1|6|1|1
516 |Value|(((
517 TRI_A
518
519 FLAG
520 )))|(((
521 TRI_A
522
523 Status
524 )))|(((
525 TRI_DI
526
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
572 * Each bits shows if the corresponding trigger has been configured.
573
574 Example:
575
576 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
577
578
579 **TRI Status1** is a combination to show which condition is trigger. Totally 1byte as below
580
581 (% border="1" style="background-color:#f7faff" %)
582 |bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
583 |(((
584 AV1_
585
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
617 * Each bits shows which status has been trigger on this uplink.
618
619 Example:
620
621 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
622
623
624
625
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
632 * Each bits shows which status has been trigger on this uplink.
633
634 Example:
635
636 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
637
638 00000101: Means both DI1 and DI2 trigger are enabled.
639
640
641 **Enable/Disable MOD6 **: 0x01: MOD6 is enable. 0x00: MOD6 is disable.
642
643
644 Downlink command to poll MOD6 status:
645
646 AB 06
647
648 When device got this command, it will send the MOD6 payload.
649
650
651 1.
652 11.
653 111. Payload Decoder
654
655 **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/]]
656
657
658
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
668 There are two kinds of Commands:
669
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
671
672 * **Sensor Related Commands**: These commands are special designed for LT-22222-L.  User can see these commands below:
673
674 1.
675 11.
676 111. Common Commands:
677
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
679
680
681 1.
682 11.
683 111. Sensor related commands:
684
685 ==== Set Transmit Interval ====
686
687 Set device uplink interval.
688
689 * AT Command:
690
691 AT+TDC=N
692
693 Example: AT+TDC=30000. Means set interval to 30 seconds
694
695
696 * Downlink Payload (prefix 0x01):
697
698 0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)
699
700
701 ==== Set Work Mode (AT+MOD) ====
702
703 Set work mode.
704
705 * AT Command:
706
707 AT+MOD=N 
708
709 Example: AT+MOD=2. Set work mode to Double DI counting mode
710
711
712 * Downlink Payload (prefix 0x0A):
713
714 0x0A aa     ~/~/ Same as AT+MOD=aa
715
716
717
718 ==== Poll an uplink ====
719
720 * AT Command:
721
722 There is no AT Command to poll uplink
723
724
725 * Downlink Payload (prefix 0x08):
726
727 0x08 FF     ~/~/ Poll an uplink,
728
729 Example: 0x08FF, ask device to send an Uplink
730
731
732 ==== Enable Trigger Mode ====
733
734 Use of trigger mode, please check [[ADDMOD6>>path:#MOD6]]
735
736 * AT Command:
737
738 AT+ADDMOD6=1 or 0
739
740 1: Enable Trigger Mode
741
742 0: Disable Trigger Mode
743
744
745 * Downlink Payload (prefix 0x0A 06):
746
747 0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,
748
749
750 ==== Poll trigger settings ====
751
752 Poll trigger settings,
753
754 * AT Command:
755
756 There is no AT Command for this feature.
757
758
759 * Downlink Payload (prefix 0x AB 06):
760
761 0xAB 06  ~/~/ Poll trigger settings, device will uplink [[trigger settings>>path:#Trigger_Settings]] once receive this command
762
763
764 ==== Enable / Disable DI1/DI2/DI3 as trigger ====
765
766 Enable Disable DI1/DI2/DI2 as trigger,
767
768 * AT Command:
769
770 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
771
772 Example:
773
774 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
775
776
777
778 * Downlink Payload (prefix 0xAA 02):
779
780 0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb
781
782
783
784 ==== Trigger1 – Set DI1 or DI3 as trigger ====
785
786 Set DI1 or DI3(for LT-33222-L) trigger.
787
788 * AT Command:
789
790 AT+TRIG1=a,b
791
792 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
793
794 b : delay timing.
795
796 Example:
797
798 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
799
800
801 * Downlink Payload (prefix 0x09 01 ):
802
803 0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)
804
805
806 ==== Trigger2 – Set DI2 as trigger ====
807
808 Set DI2 trigger.
809
810 * AT Command:
811
812 AT+TRIG2=a,b
813
814 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
815
816 b : delay timing.
817
818 Example:
819
820 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
821
822
823 * Downlink Payload (prefix 0x09 02 ):
824
825 0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)
826
827
828 ==== Trigger – Set AC (current) as trigger ====
829
830 Set current trigger , base on AC port. See [[trigger mode>>path:#MOD6]]
831
832 * AT Command:
833
834 AT+ACLIM. See [[trigger mode>>path:#MOD6]]
835
836
837 * Downlink Payload (prefix 0xAA 01 ):
838
839 0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>path:#MOD6]]
840
841
842 ==== Trigger – Set AV (voltage) as trigger ====
843
844 Set current trigger , base on AV port. See [[trigger mode>>path:#MOD6]]
845
846 * AT Command:
847
848 AT+AVLIM. See [[trigger mode>>path:#MOD6]]
849
850
851 * Downlink Payload (prefix 0xAA 00 ):
852
853 0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>path:#MOD6]]
854
855 ==== Trigger – Set minimum interval ====
856
857 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
858
859 * AT Command:
860
861 AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.
862
863
864 * Downlink Payload (prefix 0xAC ):
865
866 0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
867
868
869 ==== DO ~-~- Control Digital Output DO1/DO2/DO3 ====
870
871 * AT Command:
872
873 There is no AT Command to control Digital Output
874
875
876 * Downlink Payload (prefix 0x02):
877
878 0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output
879
880 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
881
882 01: Low,  00: High ,  11: No action
883
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
889
890 Note: For LT-22222-L, there is no DO3, the last byte can use any value.
891
892 Device will upload a packet if downlink code executes successfully.
893
894
895
896
897
898 ==== DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
899
900 * AT Command:
901
902 There is no AT Command to control Digital Output
903
904
905 * Downlink Payload (prefix 0xA9):
906
907 0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control
908
909 This is to control the digital output time of DO pin. Include four bytes:
910
911 **First Byte:** Type code (0xA9)
912
913 **Second Byte**: Inverter Mode
914
915 01: DO pins will change back to original state after timeout.
916
917 00: DO pins will change to an inverter state after timeout 
918
919
920 **Third Byte**: Control Method and Ports status:
921
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
927
928 **Fourth Byte**: Control Method and Ports status:
929
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
935
936 **Fifth Byte**: Control Method and Ports status:
937
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
943
944 **Sixth and Seventh Byte**:
945
946 Latching time. Unit: ms
947
948 Device will upload a packet if downlink code executes successfully.
949
950
951
952 Example payload:
953
954 1. A9 01 01 01 01 07 D0
955
956 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
957
958
959 1. A9 01 00 01 11 07 D0
960
961 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
962
963
964 1. A9 00 00 00 00 07 D0
965
966 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
967
968
969 1. A9 00 11 01 00 07 D0
970
971 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
972
973
974
975
976 ==== Relay ~-~- Control Relay Output RO1/RO2 ====
977
978 * AT Command:
979
980 There is no AT Command to control Relay Output
981
982
983 * Downlink Payload (prefix 0x03):
984
985 0x03 aa bb     ~/~/ Set RO1/RO2 output
986
987 If payload = 0x030100, it means set RO1 to close and RO2 to open.
988
989 01: Close ,  00: Open , 11: No action
990
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
1001
1002 Device will upload a packet if downlink code executes successfully.
1003
1004
1005 ==== Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1006
1007 * AT Command:
1008
1009 There is no AT Command to control Relay Output
1010
1011
1012 * Downlink Payload (prefix 0x05):
1013
1014 0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:
1015
1016 This is to control the relay output time of relay. Include four bytes:
1017
1018 **First Byte:** Type code (0x05)
1019
1020 **Second Byte(aa)**: Inverter Mode
1021
1022 01: Relays will change back to original state after timeout.
1023
1024 00: Relays will change to an inverter state after timeout
1025
1026
1027 **Third Byte(bb)**: Control Method and Ports status:
1028
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
1039
1040 **Fourth / Fifth Bytes (cc)**: Latching time. Unit: ms
1041
1042 Device will upload a packet if downlink code executes successfully.
1043
1044
1045
1046 **Example payload:**
1047
1048 1. 05 01 11 07 D0
1049
1050 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1051
1052
1053 1. 05 01 10 07 D0
1054
1055 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1056
1057
1058 1. 05 00 01 07 D0
1059
1060 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1061
1062
1063 1. 05 00 00 07 D0
1064
1065 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1066
1067
1068
1069
1070
1071
1072 ==== Counting ~-~- Voltage threshold counting ====
1073
1074 When voltage exceed the threshold, count. Feature see [[MOD4>>path:#MOD4]]
1075
1076 * AT Command:
1077
1078 AT+VOLMAX    ~/~/ See [[MOD4>>path:#MOD4]]
1079
1080
1081 * Downlink Payload (prefix 0xA5):
1082
1083 0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc
1084
1085
1086 ==== Counting ~-~- Pre-configure the Count Number ====
1087
1088 * AT Command:
1089
1090 AT+SETCNT=aa,(bb cc dd ee)
1091
1092 aa: 1: Set count1,
1093
1094 2: Set count2,
1095
1096 3: Set AV1 count
1097
1098 Bb cc dd ee: number to be set
1099
1100
1101 * Downlink Payload (prefix 0xA8):
1102
1103 0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1104
1105
1106
1107
1108
1109 ==== Counting ~-~- Clear Counting ====
1110
1111 Clear counting for counting mode
1112
1113 * AT Command:
1114
1115 AT+CLRCOUNT ~/~/ clear all counting
1116
1117
1118 * Downlink Payload (prefix 0xA6):
1119
1120 0x A6 01     ~/~/ clear all counting,
1121
1122
1123
1124
1125 ==== Counting ~-~- Change counting mode save time ====
1126
1127 * AT Command:
1128
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)
1130
1131
1132 * Downlink Payload (prefix 0xA7):
1133
1134 0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,
1135
1136 range: aa bb cc:0 to 16777215,  (unit:second)
1137
1138
1139
1140
1141 1.
1142 11. Integrate with Mydevice
1143
1144 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:
1145
1146
1147 Step 1: Be sure that your device is programmed and properly connected to the network at this time.
1148
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:
1150
1151
1152 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image010.png]]
1153
1154
1155 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image011.png]]
1156
1157
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
1166 Search under The things network
1167
1168 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image013.png]]
1169
1170
1171 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1172
1173 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image014.png]]
1174
1175
1176 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image015.png]]
1177
1178
1179 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image016.png]]
1180
1181
1182 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image017.png]]
1183
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
1192 Support NPN Type sensor
1193
1194 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image019.png]]
1195
1196
1197
1198 1.
1199 11.
1200 111. Digital Input Port: DI1/DI2 ( For LT-22222-L)
1201
1202 The DI port of LT-22222-L can support NPN or PNP output sensor.
1203
1204 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
1205
1206 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image020.png]]
1207
1208 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1209
1210
1211 **Example1**: Connect to a Low active sensor.
1212
1213 This type of sensor will output a low signal GND when active.
1214
1215 * Connect sensor’s output to DI1-
1216 * Connect sensor’s VCC to DI1+.
1217
1218 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1219
1220 //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1221
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.
1223
1224
1225 **Example2**: Connect to a High active sensor.
1226
1227 This type of sensor will output a high signal (example 24v) when active.
1228
1229 * Connect sensor’s output to DI1+
1230 * Connect sensor’s GND DI1-.
1231
1232 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1233
1234 //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1235
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.
1237
1238
1239 **Example3**: Connect to a 220v high active sensor.公司测试一下
1240
1241 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1242
1243 * Connect sensor’s output to DI1+ with a serial 50K resistor
1244 * Connect sensor’s GND DI1-.
1245
1246 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1247
1248 //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 51K.
1249
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.
1251
1252
1253 1.
1254 11.
1255 111. Digital Output Port: DO1/DO2 /DO3
1256
1257 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1258
1259 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
1260
1261
1262
1263
1264 1.
1265 11.
1266 111. Analog Input Interface
1267
1268 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:
1269
1270 AC2 = (IN2 voltage )/12
1271
1272 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
1273
1274
1275
1276 Example to connect a 4~~20mA sensor
1277
1278 We take the wind speed sensor as an example for reference only.
1279
1280 Specifications of the wind speed sensor:
1281
1282 Red:12~~24v
1283
1284 Yellow:4~~20mA
1285
1286 Black:GND
1287
1288
1289 Connection diagram:
1290
1291 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.jpg]]
1292
1293 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
1294
1295
1296
1297 1.
1298 11.
1299 111. Relay Output
1300
1301 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:
1302
1303 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
1304
1305
1306 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
1307
1308
1309
1310
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
1352 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.
1353
1354 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1355
1356
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:
1358
1359 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]
1360
1361
1362 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/]]
1363
1364 AT+<CMD>?        : Help on <CMD>
1365
1366 AT+<CMD>         : Run <CMD>
1367
1368 AT+<CMD>=<value> : Set the value
1369
1370 AT+<CMD>=?       : Get the value
1371
1372 ATZ: Trig a reset of the MCU
1373
1374 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1375
1376 AT+DEUI: Get or Set the Device EUI
1377
1378 AT+DADDR: Get or Set the Device Address
1379
1380 AT+APPKEY: Get or Set the Application Key
1381
1382 AT+NWKSKEY: Get or Set the Network Session Key
1383
1384 AT+APPSKEY: Get or Set the Application Session Key
1385
1386 AT+APPEUI: Get or Set the Application EUI
1387
1388 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1389
1390 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1391
1392 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1393
1394 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1395
1396 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1397
1398 AT+RX2FQ: Get or Set the Rx2 window frequency
1399
1400 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1401
1402 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1403
1404 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1405
1406 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1407
1408 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1409
1410 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1411
1412 AT+NWKID: Get or Set the Network ID
1413
1414 AT+FCU: Get or Set the Frame Counter Uplink
1415
1416 AT+FCD: Get or Set the Frame Counter Downlink
1417
1418 AT+CLASS: Get or Set the Device Class
1419
1420 AT+JOIN: Join network
1421
1422 AT+NJS: Get OTAA Join Status
1423
1424 AT+SENDB: Send hexadecimal data along with the application port
1425
1426 AT+SEND: Send text data along with the application port
1427
1428 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1429
1430 AT+RECV: Print last received data in raw format
1431
1432 AT+VER: Get current image version and Frequency Band
1433
1434 AT+CFM: Get or Set the confirmation mode (0-1)
1435
1436 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1437
1438 AT+SNR: Get the SNR of the last received packet
1439
1440 AT+RSSI: Get the RSSI of the last received packet
1441
1442 AT+TDC: Get or set the application data transmission interval in ms
1443
1444 AT+PORT: Get or set the application port
1445
1446 AT+DISAT: Disable AT commands
1447
1448 AT+PWORD: Set password, max 9 digits
1449
1450 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1451
1452 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1453
1454 AT+CFG: Print all settings
1455
1456
1457
1458 1.
1459 11. Common AT Command Sequence
1460 111. Multi-channel ABP mode (Use with SX1301/LG308)
1461
1462 If device has not joined network yet:
1463
1464 123456
1465
1466 AT+FDR
1467
1468 123456
1469
1470 AT+NJM=0
1471
1472 ATZ
1473
1474
1475 If device already joined network:
1476
1477 AT+NJM=0
1478
1479 ATZ
1480
1481 1.
1482 11.
1483 111. Single-channel ABP mode (Use with LG01/LG02)
1484
1485 123456   Enter Password to have AT access.
1486
1487 AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1488
1489 123456   Enter Password to have AT access.
1490
1491 AT+CLASS=C Set to work in CLASS C
1492
1493 AT+NJM=0 Set to ABP mode
1494
1495 AT+ADR=0 Set the Adaptive Data Rate Off
1496
1497 AT+DR=5  Set Data Rate
1498
1499 AT+TDC=60000  Set transmit interval to 60 seconds
1500
1501 AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1502
1503 AT+RX2FQ=868400000 Set RX2Frequency to 868.4Mhz (according to the result from server)
1504
1505 AT+RX2DR=5  Set RX2DR to match the downlink DR from server. see below
1506
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.
1508
1509 ATZ          Reset MCU
1510
1511 **Note:**
1512
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
1517
1518 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image031.png]]
1519
1520
1521 1.
1522 11.
1523 111. Change to Class A
1524
1525 If sensor JOINED
1526
1527 AT+CLASS=A
1528
1529 ATZ
1530
1531
1532
1533
1534
1535 1. FAQ
1536
1537 1.
1538 11. How to upgrade the image?
1539
1540 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1541
1542 * Support new features
1543 * For bug fix
1544 * Change LoRaWAN bands.
1545
1546 Below shows the hardware connection for how to upload an image to the LT:
1547
1548 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1549
1550
1551 **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
1553 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1554
1555 **Step3: **Open flashloader; choose the correct COM port to update.
1556
1557 **For LT-33222-L**:
1558
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.
1560
1561 **For LT-22222-L**:
1562
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.
1564
1565
1566
1567 |(((
1568 Board detected
1569 )))
1570
1571 |(((
1572
1573 )))
1574
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
1599 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1600
1601 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1602
1603
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.
1605
1606 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image039.png]]
1607
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.
1609
1610
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
1633 As shown in below:
1634
1635 [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image040.png]]
1636
1637
1638
1639 1.
1640 11. Can I see counting event in Serial?
1641
1642 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.
1643
1644
1645
1646
1647 1. Trouble Shooting     
1648 11. Downlink doesn’t work, how to solve it?
1649
1650 Please see this link for how to debug:
1651
1652 [[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]]
1653
1654
1655 1.
1656 11. Have trouble to upload image.
1657
1658 See this link for trouble shooting:
1659
1660 [[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]]
1661
1662
1663 1.
1664 11. Why I can’t join TTN in US915 /AU915 bands?
1665
1666 It might be about the channels mapping. Please see this link for detail:
1667
1668 [[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]]
1669
1670
1671
1672
1673 1. Order Info
1674
1675 **For LT-33222-L-XXX or LT-22222-L-XXX:**
1676
1677 **XXX:**
1678
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
1691 **Package Includes**:
1692
1693 * LT I/O Controller x 1
1694 * Stick Antenna for LoRa RF part x 1
1695 * Bracket for controller x1
1696 * Program cable x 1
1697
1698 **Dimension and weight**:
1699
1700 * Device Size: 13.5 x 7 x 3 cm
1701 * Device Weight: 105g
1702 * Package Size / pcs : 14.5 x 8 x 5 cm
1703 * Weight / pcs : 170g
1704
1705 1. Support
1706
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
1709
1710 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]