Version 77.107 by Xiaoling on 2022/06/10 09:35
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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 **Table of Contents:**
8
9 {{toc/}}
10
11
12
13
14
15
16
17 = 1.Introduction =
18
19 == 1.1 What is LT Series I/O Controller ==
20
21 (((
22 The Dragino (% style="color:blue" %)**LT series I/O Modules**(%%) are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as:** (% style="color:blue" %)analog current Input, analog voltage input(%%)**(% style="color:blue" %), **relay output**, **digital input**(%%) and (% style="color:blue" %)**digital output**(%%) etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
23 )))
24
25 (((
26 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.
27 )))
28
29 (((
30 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
31 )))
32
33 (((
34 The use environment includes:
35 )))
36
37 (((
38 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.
39 )))
40
41 (((
42 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
43 )))
44
45 (((
46 [[image:1653295757274-912.png]]
47
48
49 )))
50
51 == 1.2  Specifications ==
52
53 (((
54
55
56 **Hardware System:**
57 )))
58
59 * (((
60 STM32L072CZT6 MCU
61 )))
62 * (((
63 SX1276/78 Wireless Chip 
64 )))
65 * (((
66 (((
67 Power Consumption:
68 )))
69
70 * (((
71 Idle: 4mA@12v
72 )))
73 * (((
74 20dB Transmit: 34mA@12v
75 )))
76 )))
77
78 (((
79 **Interface for Model: LT22222-L:**
80 )))
81
82 * (((
83 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
84 )))
85 * (((
86 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
87 )))
88 * (((
89 2 x Relay Output (5A@250VAC / 30VDC)
90 )))
91 * (((
92 2 x 0~~20mA Analog Input (res:0.01mA)
93 )))
94 * (((
95 2 x 0~~30V Analog Input (res:0.01v)
96 )))
97 * (((
98 Power Input 7~~ 24V DC. 
99 )))
100
101 (((
102 **LoRa Spec:**
103 )))
104
105 * (((
106 (((
107 Frequency Range:
108 )))
109
110 * (((
111 Band 1 (HF): 862 ~~ 1020 Mhz
112 )))
113 * (((
114 Band 2 (LF): 410 ~~ 528 Mhz
115 )))
116 )))
117 * (((
118 168 dB maximum link budget.
119 )))
120 * (((
121 +20 dBm - 100 mW constant RF output vs.
122 )))
123 * (((
124 +14 dBm high efficiency PA.
125 )))
126 * (((
127 Programmable bit rate up to 300 kbps.
128 )))
129 * (((
130 High sensitivity: down to -148 dBm.
131 )))
132 * (((
133 Bullet-proof front end: IIP3 = -12.5 dBm.
134 )))
135 * (((
136 Excellent blocking immunity.
137 )))
138 * (((
139 Low RX current of 10.3 mA, 200 nA register retention.
140 )))
141 * (((
142 Fully integrated synthesizer with a resolution of 61 Hz.
143 )))
144 * (((
145 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
146 )))
147 * (((
148 Built-in bit synchronizer for clock recovery.
149 )))
150 * (((
151 Preamble detection.
152 )))
153 * (((
154 127 dB Dynamic Range RSSI.
155 )))
156 * (((
157 Automatic RF Sense and CAD with ultra-fast AFC.
158 )))
159 * (((
160 Packet engine up to 256 bytes with CRC.
161
162
163 )))
164
165 == 1.3 Features ==
166
167 * LoRaWAN Class A & Class C protocol
168 * Optional Customized LoRa Protocol
169 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
170 * AT Commands to change parameters
171 * Remote configure parameters via LoRa Downlink
172 * Firmware upgradable via program port
173 * Counting
174
175 == 1.4  Applications ==
176
177 * Smart Buildings & Home Automation
178 * Logistics and Supply Chain Management
179 * Smart Metering
180 * Smart Agriculture
181 * Smart Cities
182 * Smart Factory
183
184 == 1.5 Hardware Variants ==
185
186 (% border="1" style="background-color:#f7faff; width:500px" %)
187 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
188 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
189 * 2 x Digital Input (Bi-direction)
190 * 2 x Digital Output
191 * 2 x Relay Output (5A@250VAC / 30VDC)
192 * 2 x 0~~20mA Analog Input (res:0.01mA)
193 * 2 x 0~~30V Analog Input (res:0.01v)
194 * 1 x Counting Port
195 )))
196
197 = 2. Power ON Device =
198
199 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.
200
201 (((
202 PWR will on when device is properly powered.
203 )))
204
205 [[image:1653297104069-180.png]]
206
207
208
209 = 3. Operation Mode =
210
211 == 3.1 How it works? ==
212
213 (((
214 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. 
215 )))
216
217 (((
218 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>>||anchor="H4.UseATCommand"]] to set the keys in the devices.
219 )))
220
221
222 == 3.2 Example to join LoRaWAN network ==
223
224 (((
225 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. 
226 )))
227
228 [[image:image-20220523172350-1.png||height="266" width="864"]]
229
230
231 (((
232 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:
233 )))
234
235 (((
236 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
237 )))
238
239 (((
240 Each LT is shipped with a sticker with the default device EUI as below:
241 )))
242
243 [[image:1653297924498-393.png]]
244
245
246 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
247
248 Add APP EUI in the application.
249
250 [[image:1653297955910-247.png||height="321" width="716"]]
251
252
253 Add APP KEY and DEV EUI
254
255 [[image:1653298023685-319.png]]
256
257
258 (((
259 (% style="color:blue" %)**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.
260 )))
261
262 [[image:1653298044601-602.png||height="405" width="709"]]
263
264
265
266 == 3.3 Uplink Payload ==
267
268 There are five working modes + one interrupt mode on LT for different type application:
269
270 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
271 * **MOD2**: Double DI Counting + DO + RO
272 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
273 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
274 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
275 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
276
277
278
279 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
280
281 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
282
283 [[image:image-20220523174024-3.png]]
284
285 (((
286
287
288 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
289 )))
290
291 [[image:image-20220523174254-4.png]]
292
293 * RO is for relay. ROx=1 : close，ROx=0 always open.
294 * DI is for digital input. DIx=1: high or float, DIx=0: low.
295 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
296
297 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
298
299 For example if payload is: [[image:image-20220523175847-2.png]]
300
301
302 **The value for the interface is:  **
303
304 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
305
306 AVI2 channel voltage is 0x04AC/1000=1.196V
307
308 ACI1 channel current is 0x1310/1000=4.880mA
309
310 ACI2 channel current is 0x1300/1000=4.864mA
311
312 The last byte 0xAA= 10101010(B) means
313
314 * [1] RO1 relay channel is close and the RO1 LED is ON.
315 * [0] RO2 relay channel is open and RO2 LED is OFF;
316
317
318 **LT22222-L:**
319
320 * [1] DI2 channel is high input and DI2 LED is ON;
321 * [0] DI1 channel is low input;
322
323 * [0] DO3 channel output state
324 ** DO3 is float in case no load between DO3 and V+.;
325 ** DO3 is high in case there is load between DO3 and V+.
326 ** DO3 LED is off in both case
327 * [1] DO2 channel output is low and DO2 LED is ON.
328 * [0] DO1 channel output state
329 ** DO1 is float in case no load between DO1 and V+.;
330 ** DO1 is high in case there is load between DO1 and V+.
331 ** DO1 LED is off in both case
332
333
334
335 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
336
337
338 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
339
340 (((
341 Total : 11 bytes payload
342 )))
343
344 [[image:image-20220523180452-3.png]]
345
346
347 (((
348 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
349 )))
350
351 [[image:image-20220523180506-4.png]]
352
353 * RO is for relay. ROx=1 : close，ROx=0 always open.
354 * FIRST: Indicate this is the first packet after join network.
355 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
356
357 (((
358 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
359 )))
360
361 (((
362
363
364 **To use counting mode, please run:**
365 )))
366
367 (% class="box infomessage" %)
368 (((
369 (((
370 **AT+MOD=2**
371 )))
372 )))
373
374 (% class="box infomessage" %)
375 (((
376 (((
377 **ATZ**
378 )))
379 )))
380
381 (((
382
383
384 (% style="color:#4f81bd" %)**AT Commands for counting:**
385 )))
386
387 (((
388 **For LT22222-L:**
389 )))
390
391 (% class="box infomessage" %)
392 (((
393 (((
394 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
395 )))
396 )))
397
398 (% class="box infomessage" %)
399 (((
400 (((
401 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
402 )))
403 )))
404
405 (% class="box infomessage" %)
406 (((
407 (((
408 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
409 )))
410 )))
411
412 (% class="box infomessage" %)
413 (((
414 (((
415 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
416 )))
417 )))
418
419 (% class="box infomessage" %)
420 (((
421 (((
422 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
423 )))
424 )))
425
426 (% class="box infomessage" %)
427 (((
428 (((
429 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
430 )))
431 )))
432
433
434
435 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
436
437 **LT22222-L**: This mode the DI1 is used as a counting pin.
438
439 [[image:image-20220523181246-5.png]]
440
441 (((
442 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
443 )))
444
445 [[image:image-20220523181301-6.png]]
446
447 * RO is for relay. ROx=1 : close，ROx=0 always open.
448 * FIRST: Indicate this is the first packet after join network.
449 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
450
451 (((
452 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
453 )))
454
455 (((
456 **To use counting mode, please run:**
457 )))
458
459 (% class="box infomessage" %)
460 (((
461 (((
462 **AT+MOD=3**
463 )))
464 )))
465
466 (% class="box infomessage" %)
467 (((
468 (((
469 **ATZ**
470 )))
471 )))
472
473 (((
474 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
475
476
477 )))
478
479
480 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
481
482
483 **LT22222-L**: This mode the DI1 is used as a counting pin.
484
485 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.
486
487 [[image:image-20220523181903-8.png]]
488
489
490 (((
491 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
492 )))
493
494 [[image:image-20220523181727-7.png]]
495
496 * RO is for relay. ROx=1 : close，ROx=0 always open.
497 * FIRST: Indicate this is the first packet after join network.
498 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
499
500 (((
501 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
502 )))
503
504 (((
505
506
507 **To use this mode, please run:**
508 )))
509
510 (% class="box infomessage" %)
511 (((
512 (((
513 **AT+MOD=4**
514 )))
515 )))
516
517 (% class="box infomessage" %)
518 (((
519 (((
520 **ATZ**
521 )))
522 )))
523
524 (((
525
526 )))
527
528 (((
529 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
530 )))
531
532 (((
533
534
535 **Plus below command for AVI1 Counting:**
536 )))
537
538 (% class="box infomessage" %)
539 (((
540 (((
541 **AT+SETCNT=3,60   (set AVI Count to 60)**
542 )))
543 )))
544
545 (% class="box infomessage" %)
546 (((
547 (((
548 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
549 )))
550 )))
551
552 (% class="box infomessage" %)
553 (((
554 (((
555 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
556 )))
557 )))
558
559 (% class="box infomessage" %)
560 (((
561 (((
562 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
563 )))
564 )))
565
566
567
568 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
569
570
571 **LT22222-L**: This mode the DI1 is used as a counting pin.
572
573 [[image:image-20220523182334-9.png]]
574
575 (((
576
577
578 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
579 )))
580
581 * RO is for relay. ROx=1 : close，ROx=0 always open.
582 * FIRST: Indicate this is the first packet after join network.
583 * (((
584 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
585 )))
586
587 (((
588 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
589 )))
590
591 (((
592
593
594 **To use this mode, please run:**
595 )))
596
597 (% class="box infomessage" %)
598 (((
599 (((
600 **AT+MOD=5**
601 )))
602 )))
603
604 (% class="box infomessage" %)
605 (((
606 (((
607 **ATZ**
608 )))
609 )))
610
611 (((
612 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
613 )))
614
615
616
617 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
618
619
620 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
621
622 For example, if user has configured below commands:
623
624 * **AT+MOD=1 ** **~-~->** The normal working mode
625 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
626
627 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
628
629 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
630 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.**
631
632
633 **AT Command to set Trigger Condition**:
634
635 (% style="color:#4f81bd" %)**Trigger base on voltage**:
636
637 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
638
639 **Example:**
640
641 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)
642
643 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
644
645
646
647 (% style="color:#4f81bd" %)**Trigger base on current**:
648
649 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
650
651 **Example:**
652
653 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
654
655
656
657 (% style="color:#4f81bd" %)**Trigger base on DI status**:
658
659 DI status trigger Flag.
660
661 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
662
663
664 **Example:**
665
666 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
667
668
669 **Downlink Command to set Trigger Condition:**
670
671 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
672
673 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
674
675 AA: Code for this downlink Command:
676
677 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
678
679 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
680
681 yy2 yy2: AC1 or AV1 high limit.
682
683 yy3 yy3: AC2 or AV2 low limit.
684
685 Yy4 yy4: AC2 or AV2 high limit.
686
687
688 **Example1**: AA 00 13 88 00 00 00 00 00 00
689
690 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
691
692
693 **Example2**: AA 02 01 00
694
695 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
696
697
698
699 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
700
701 MOD6 Payload : total 11 bytes payload
702
703 [[image:image-20220524085923-1.png]]
704
705
706 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
707
708 [[image:image-20220524090106-2.png]]
709
710 * Each bits shows if the corresponding trigger has been configured.
711
712
713 **Example:**
714
715 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
716
717
718 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
719
720 [[image:image-20220524090249-3.png]]
721
722 * Each bits shows which status has been trigger on this uplink.
723
724
725 **Example:**
726
727 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
728
729
730 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
731
732 [[image:image-20220524090456-4.png]]
733
734 * Each bits shows which status has been trigger on this uplink.
735
736
737 **Example:**
738
739 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
740
741 00000101: Means both DI1 and DI2 trigger are enabled.
742
743
744 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
745
746 Downlink command to poll MOD6 status:
747
748 **AB 06**
749
750 When device got this command, it will send the MOD6 payload.
751
752
753
754 === 3.3.7 Payload Decoder ===
755
756 (((
757
758
759 **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/]]
760
761
762 )))
763
764
765
766 == 3.4 ​Configure LT via AT or Downlink ==
767
768 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
769
770 (((
771 There are two kinds of Commands:
772 )))
773
774 * (% 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: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
775
776 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
777
778
779 === 3.4.1 Common Commands ===
780
781 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>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
782
783
784
785 === 3.4.2 Sensor related commands ===
786
787 ==== 3.4.2.1 Set Transmit Interval ====
788
789 Set device uplink interval.
790
791 * AT Command:
792
793 (% class="box infomessage" %)
794 (((
795 **AT+TDC=N **
796 )))
797
798 **Example: **AT+TDC=30000. Means set interval to 30 seconds
799
800
801 * Downlink Payload (prefix 0x01):
802
803 (% class="box infomessage" %)
804 (((
805 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
806 )))
807
808
809
810 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
811
812 Set work mode.
813
814 * AT Command:
815
816 (% class="box infomessage" %)
817 (((
818 **AT+MOD=N  **
819 )))
820
821 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
822
823
824 * Downlink Payload (prefix 0x0A):
825
826 (% class="box infomessage" %)
827 (((
828 **0x0A aa     ~/~/ Same as AT+MOD=aa**
829 )))
830
831
832
833 ==== 3.4.2.3 Poll an uplink ====
834
835 * AT Command:
836
837 There is no AT Command to poll uplink
838
839
840 * Downlink Payload (prefix 0x08):
841
842 (% class="box infomessage" %)
843 (((
844 **0x08 FF     ~/~/ Poll an uplink,**
845 )))
846
847 **Example**: 0x08FF, ask device to send an Uplink
848
849
850
851 ==== 3.4.2.4 Enable Trigger Mode ====
852
853 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
854
855 * AT Command:
856
857 (% class="box infomessage" %)
858 (((
859 **AT+ADDMOD6=1 or 0**
860 )))
861
862 1: Enable Trigger Mode
863
864 0: Disable Trigger Mode
865
866
867 * Downlink Payload (prefix 0x0A 06):
868
869 (% class="box infomessage" %)
870 (((
871 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
872 )))
873
874
875
876 ==== 3.4.2.5 Poll trigger settings ====
877
878 Poll trigger settings,
879
880 * AT Command:
881
882 There is no AT Command for this feature.
883
884
885 * Downlink Payload (prefix 0x AB 06):
886
887 (% class="box infomessage" %)
888 (((
889 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
890 )))
891
892
893
894 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
895
896 Enable Disable DI1/DI2/DI2 as trigger,
897
898 * AT Command:
899
900 (% class="box infomessage" %)
901 (((
902 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
903 )))
904
905
906 **Example:**
907
908 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
909
910 * Downlink Payload (prefix 0xAA 02):
911
912 (% class="box infomessage" %)
913 (((
914 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
915 )))
916
917
918
919 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
920
921 Set DI1 or DI3(for LT-33222-L) trigger.
922
923 * AT Command:
924
925 (% class="box infomessage" %)
926 (((
927 **AT+TRIG1=a,b**
928 )))
929
930 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
931
932 b : delay timing.
933
934
935 **Example:**
936
937 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
938
939
940 * Downlink Payload (prefix 0x09 01 ):
941
942 (% class="box infomessage" %)
943 (((
944 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
945 )))
946
947
948
949 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
950
951 Set DI2 trigger.
952
953 * AT Command:
954
955 (% class="box infomessage" %)
956 (((
957 **AT+TRIG2=a,b**
958 )))
959
960 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
961
962 b : delay timing.
963
964
965 **Example:**
966
967 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
968
969
970 * Downlink Payload (prefix 0x09 02 ):
971
972 (% class="box infomessage" %)
973 (((
974 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
975 )))
976
977
978
979 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
980
981 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
982
983 * AT Command:
984
985 (% class="box infomessage" %)
986 (((
987 **AT+ACLIM. **
988 )))
989
990
991 * Downlink Payload (prefix 0xAA 01 ):
992
993 (% class="box infomessage" %)
994 (((
995 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
996 )))
997
998
999
1000 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
1001
1002 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1003
1004 * AT Command:
1005
1006 (% class="box infomessage" %)
1007 (((
1008 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1009 )))
1010
1011
1012 * Downlink Payload (prefix 0xAA 00 ):
1013
1014 (% class="box infomessage" %)
1015 (((
1016 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
1017 )))
1018
1019
1020
1021 ==== 3.4.2.11 Trigger – Set minimum interval ====
1022
1023 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
1024
1025 * AT Command:
1026
1027 (% class="box infomessage" %)
1028 (((
1029 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1030 )))
1031
1032
1033 * Downlink Payload (prefix 0xAC ):
1034
1035 (% class="box infomessage" %)
1036 (((
1037 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1038 )))
1039
1040
1041
1042 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1043
1044 * AT Command:
1045
1046 There is no AT Command to control Digital Output
1047
1048
1049 * Downlink Payload (prefix 0x02):
1050
1051 (% class="box infomessage" %)
1052 (((
1053 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1054 )))
1055
1056 (((
1057 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1058 )))
1059
1060 (((
1061 01: Low,  00: High ,  11: No action
1062 )))
1063
1064 [[image:image-20220524092754-5.png]]
1065
1066 (((
1067 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1068 )))
1069
1070 (((
1071 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1072 )))
1073
1074
1075
1076 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1077
1078 * AT Command:
1079
1080 There is no AT Command to control Digital Output
1081
1082
1083 * Downlink Payload (prefix 0xA9):
1084
1085 (% class="box infomessage" %)
1086 (((
1087 (((
1088 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1089 )))
1090 )))
1091
1092 This is to control the digital output time of DO pin. Include four bytes:
1093
1094 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1095
1096 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1097
1098 01: DO pins will change back to original state after timeout.
1099
1100 00: DO pins will change to an inverter state after timeout 
1101
1102
1103 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1104
1105 [[image:image-20220524093238-6.png]]
1106
1107
1108 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1109
1110 [[image:image-20220524093328-7.png]]
1111
1112
1113 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1114
1115 [[image:image-20220524093351-8.png]]
1116
1117
1118 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1119
1120 Latching time. Unit: ms
1121
1122 Device will upload a packet if downlink code executes successfully.
1123
1124
1125 **Example payload:**
1126
1127 **~1. A9 01 01 01 01 07 D0**
1128
1129 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1130
1131 **2. A9 01 00 01 11 07 D0**
1132
1133 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1134
1135 **3. A9 00 00 00 00 07 D0**
1136
1137 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1138
1139 **4. A9 00 11 01 00 07 D0**
1140
1141 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
1142
1143
1144
1145 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1146
1147 * AT Command:
1148
1149 There is no AT Command to control Relay Output
1150
1151
1152 * Downlink Payload (prefix 0x03):
1153
1154 (% class="box infomessage" %)
1155 (((
1156 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1157 )))
1158
1159 (((
1160 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1161 )))
1162
1163 (((
1164 01: Close ,  00: Open , 11: No action
1165 )))
1166
1167 (((
1168 [[image:image-20220524093724-9.png]]
1169 )))
1170
1171 Device will upload a packet if downlink code executes successfully.
1172
1173
1174
1175 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1176
1177 * AT Command:
1178
1179 There is no AT Command to control Relay Output
1180
1181
1182 * Downlink Payload (prefix 0x05):
1183
1184 (% class="box infomessage" %)
1185 (((
1186 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1187 )))
1188
1189 This is to control the relay output time of relay. Include four bytes:
1190
1191 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1192
1193 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1194
1195 01: Relays will change back to original state after timeout.
1196
1197 00: Relays will change to an inverter state after timeout
1198
1199
1200 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1201
1202 [[image:image-20220524093831-10.png]]
1203
1204
1205 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1206
1207 Device will upload a packet if downlink code executes successfully.
1208
1209
1210 **Example payload:**
1211
1212 **~1. 05 01 11 07 D0**
1213
1214 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1215
1216 **2. 05 01 10 07 D0**
1217
1218 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1219
1220 **3. 05 00 01 07 D0**
1221
1222 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1223
1224 **4. 05 00 00 07 D0**
1225
1226 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1227
1228
1229
1230 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1231
1232 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1233
1234 * AT Command:
1235
1236 (% class="box infomessage" %)
1237 (((
1238 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1239 )))
1240
1241
1242 * Downlink Payload (prefix 0xA5):
1243
1244 (% class="box infomessage" %)
1245 (((
1246 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1247 )))
1248
1249
1250
1251 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1252
1253 * AT Command:
1254
1255 (% class="box infomessage" %)
1256 (((
1257 **AT+SETCNT=aa,(bb cc dd ee) **
1258 )))
1259
1260 aa: 1: Set count1,
1261
1262 2: Set count2,
1263
1264 3: Set AV1 count
1265
1266 Bb cc dd ee: number to be set
1267
1268
1269 * Downlink Payload (prefix 0xA8):
1270
1271 (% class="box infomessage" %)
1272 (((
1273 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1274 )))
1275
1276
1277
1278 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1279
1280 Clear counting for counting mode
1281
1282 * AT Command:
1283
1284 (% class="box infomessage" %)
1285 (((
1286 **AT+CLRCOUNT ~/~/ clear all counting**
1287 )))
1288
1289 * Downlink Payload (prefix 0xA6):
1290
1291 (% class="box infomessage" %)
1292 (((
1293 **0x A6 01     ~/~/ clear all counting,**
1294 )))
1295
1296
1297
1298 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1299
1300 * AT Command:
1301
1302 (% class="box infomessage" %)
1303 (((
1304 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1305 )))
1306
1307 * Downlink Payload (prefix 0xA7):
1308
1309 (% class="box infomessage" %)
1310 (((
1311 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1312 )))
1313
1314 (((
1315 range: aa bb cc:0 to 16777215,  (unit:second)
1316
1317
1318 )))
1319
1320
1321 == 3.5 Integrate with Mydevice ==
1322
1323 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:
1324
1325 (((
1326 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1327 )))
1328
1329 (((
1330 (% style="color:blue" %)**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:
1331 )))
1332
1333 [[image:1653356737703-362.png||height="232" width="732"]]
1334
1335 [[image:image-20220524094641-11.png||height="390" width="723"]]
1336
1337
1338 [[image:image-20220524094641-12.png||height="402" width="718"]]
1339
1340
1341 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1342
1343 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1344
1345 Search under The things network
1346
1347 [[image:1653356838789-523.png||height="337" width="740"]]
1348
1349
1350
1351 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1352
1353 [[image:image-20220524094909-1.png||height="335" width="729"]]
1354
1355
1356 [[image:image-20220524094909-2.png||height="337" width="729"]]
1357
1358
1359 [[image:image-20220524094909-3.png||height="338" width="727"]]
1360
1361
1362 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1363
1364
1365 [[image:image-20220524094909-5.png||height="341" width="734"]]
1366
1367
1368
1369 == 3.6 Interface Detail ==
1370
1371 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1372
1373 Support NPN Type sensor
1374
1375 [[image:1653356991268-289.png]]
1376
1377
1378
1379 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1380
1381 (((
1382 The DI port of LT-22222-L can support NPN or PNP output sensor.
1383 )))
1384
1385 (((
1386 (((
1387 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
1388 )))
1389 )))
1390
1391 [[image:1653357170703-587.png]]
1392
1393 (((
1394 (((
1395 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1396 )))
1397 )))
1398
1399 (((
1400
1401 )))
1402
1403 (((
1404 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1405 )))
1406
1407 (((
1408 This type of sensor will output a low signal GND when active.
1409 )))
1410
1411 * (((
1412 Connect sensor’s output to DI1-
1413 )))
1414 * (((
1415 Connect sensor’s VCC to DI1+.
1416 )))
1417
1418 (((
1419 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1420 )))
1421
1422 (((
1423 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1424 )))
1425
1426 (((
1427 If DI1+ = 12v, the [[image:1653968155772-850.png||height="23" width="19"]]= 12mA , So the LT-22222-L will be able to detect this active signal.
1428 )))
1429
1430 (((
1431
1432 )))
1433
1434 (((
1435 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1436 )))
1437
1438 (((
1439 This type of sensor will output a high signal (example 24v) when active.
1440 )))
1441
1442 * (((
1443 Connect sensor’s output to DI1+
1444 )))
1445 * (((
1446 Connect sensor’s GND DI1-.
1447 )))
1448
1449 (((
1450 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1451 )))
1452
1453 (((
1454 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1455 )))
1456
1457 (((
1458 If **DI1+ = 24v**, the[[image:1653968155772-850.png||height="23" width="19"]] 24mA , So the LT-22222-L will be able to detect this high active signal.
1459 )))
1460
1461 (((
1462
1463 )))
1464
1465 (((
1466 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1467 )))
1468
1469 (((
1470 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1471 )))
1472
1473 * (((
1474 Connect sensor’s output to DI1+ with a serial 50K resistor
1475 )))
1476 * (((
1477 Connect sensor’s GND DI1-.
1478 )))
1479
1480 (((
1481 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1482 )))
1483
1484 (((
1485 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1486 )))
1487
1488 (((
1489 If sensor output is 220v, the [[image:1653968155772-850.png||height="23" width="19"]](% 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.
1490 )))
1491
1492
1493
1494 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1495
1496 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1497
1498 [[image:1653357531600-905.png]]
1499
1500
1501
1502 === 3.6.4 Analog Input Interface ===
1503
1504 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:
1505
1506
1507 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1508
1509 [[image:1653357592296-182.png]]
1510
1511 Example to connect a 4~~20mA sensor
1512
1513 We take the wind speed sensor as an example for reference only.
1514
1515
1516 **Specifications of the wind speed sensor:**
1517
1518 Red:  12~~24v
1519
1520 Yellow:  4~~20mA
1521
1522 Black:  GND
1523
1524
1525 **Connection diagram:**
1526
1527 [[image:1653357640609-758.png]]
1528
1529 [[image:1653357648330-671.png||height="155" width="733"]]
1530
1531
1532
1533 === 3.6.5 Relay Output ===
1534
1535 (((
1536 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:
1537 )))
1538
1539 [[image:image-20220524100215-9.png]]
1540
1541 [[image:image-20220524100215-10.png||height="382" width="723"]]
1542
1543
1544
1545 == 3.7 LEDs Indicators ==
1546
1547 [[image:image-20220524100748-11.png]]
1548
1549
1550 = 4. Use AT Command =
1551
1552 == 4.1 Access AT Command ==
1553
1554 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.
1555
1556 [[image:1653358238933-385.png]]
1557
1558
1559 (((
1560 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:
1561 )))
1562
1563 [[image:1653358355238-883.png]]
1564
1565
1566 (((
1567 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/]]
1568 )))
1569
1570 (((
1571 AT+<CMD>?        : Help on <CMD>
1572 )))
1573
1574 (((
1575 AT+<CMD>         : Run <CMD>
1576 )))
1577
1578 (((
1579 AT+<CMD>=<value> : Set the value
1580 )))
1581
1582 (((
1583 AT+<CMD>=?       : Get the value
1584 )))
1585
1586 (((
1587 ATZ: Trig a reset of the MCU
1588 )))
1589
1590 (((
1591 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1592 )))
1593
1594 (((
1595 AT+DEUI: Get or Set the Device EUI
1596 )))
1597
1598 (((
1599 AT+DADDR: Get or Set the Device Address
1600 )))
1601
1602 (((
1603 AT+APPKEY: Get or Set the Application Key
1604 )))
1605
1606 (((
1607 AT+NWKSKEY: Get or Set the Network Session Key
1608 )))
1609
1610 (((
1611 AT+APPSKEY: Get or Set the Application Session Key
1612 )))
1613
1614 (((
1615 AT+APPEUI: Get or Set the Application EUI
1616 )))
1617
1618 (((
1619 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1620 )))
1621
1622 (((
1623 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1624 )))
1625
1626 (((
1627 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1628 )))
1629
1630 (((
1631 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1632 )))
1633
1634 (((
1635 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1636 )))
1637
1638 (((
1639 AT+RX2FQ: Get or Set the Rx2 window frequency
1640 )))
1641
1642 (((
1643 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1644 )))
1645
1646 (((
1647 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1648 )))
1649
1650 (((
1651 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1652 )))
1653
1654 (((
1655 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1656 )))
1657
1658 (((
1659 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1660 )))
1661
1662 (((
1663 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1664 )))
1665
1666 (((
1667 AT+NWKID: Get or Set the Network ID
1668 )))
1669
1670 (((
1671 AT+FCU: Get or Set the Frame Counter Uplink
1672 )))
1673
1674 (((
1675 AT+FCD: Get or Set the Frame Counter Downlink
1676 )))
1677
1678 (((
1679 AT+CLASS: Get or Set the Device Class
1680 )))
1681
1682 (((
1683 AT+JOIN: Join network
1684 )))
1685
1686 (((
1687 AT+NJS: Get OTAA Join Status
1688 )))
1689
1690 (((
1691 AT+SENDB: Send hexadecimal data along with the application port
1692 )))
1693
1694 (((
1695 AT+SEND: Send text data along with the application port
1696 )))
1697
1698 (((
1699 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1700 )))
1701
1702 (((
1703 AT+RECV: Print last received data in raw format
1704 )))
1705
1706 (((
1707 AT+VER: Get current image version and Frequency Band
1708 )))
1709
1710 (((
1711 AT+CFM: Get or Set the confirmation mode (0-1)
1712 )))
1713
1714 (((
1715 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1716 )))
1717
1718 (((
1719 AT+SNR: Get the SNR of the last received packet
1720 )))
1721
1722 (((
1723 AT+RSSI: Get the RSSI of the last received packet
1724 )))
1725
1726 (((
1727 AT+TDC: Get or set the application data transmission interval in ms
1728 )))
1729
1730 (((
1731 AT+PORT: Get or set the application port
1732 )))
1733
1734 (((
1735 AT+DISAT: Disable AT commands
1736 )))
1737
1738 (((
1739 AT+PWORD: Set password, max 9 digits
1740 )))
1741
1742 (((
1743 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1744 )))
1745
1746 (((
1747 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1748 )))
1749
1750 (((
1751 AT+CFG: Print all settings
1752
1753
1754 )))
1755
1756
1757
1758 == 4.2 Common AT Command Sequence ==
1759
1760 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1761
1762 (((
1763
1764
1765 **If device has not joined network yet:**
1766 )))
1767
1768 (((
1769 (% style="background-color:#dcdcdc" %)123456
1770 )))
1771
1772 (((
1773 (% style="background-color:#dcdcdc" %)AT+FDR
1774 )))
1775
1776 (((
1777 (% style="background-color:#dcdcdc" %)123456
1778 )))
1779
1780 (((
1781 (% style="background-color:#dcdcdc" %)AT+NJM=0
1782 )))
1783
1784 (((
1785 (% style="background-color:#dcdcdc" %)ATZ
1786 )))
1787
1788
1789 (((
1790 **If device already joined network:**
1791 )))
1792
1793 (((
1794 (% style="background-color:#dcdcdc" %)AT+NJM=0
1795 )))
1796
1797 (((
1798 (% style="background-color:#dcdcdc" %)ATZ
1799
1800
1801 )))
1802
1803
1804
1805 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1806
1807 (((
1808
1809
1810 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1811 )))
1812
1813 (((
1814 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1815 )))
1816
1817 (((
1818 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1819 )))
1820
1821 (((
1822 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1823 )))
1824
1825 (((
1826 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1827 )))
1828
1829 (((
1830 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1831 )))
1832
1833 (((
1834 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1835 )))
1836
1837 (((
1838 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1839 )))
1840
1841 (((
1842 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1843 )))
1844
1845 (((
1846 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1847 )))
1848
1849 (((
1850 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1851 )))
1852
1853 (((
1854 (% 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.
1855 )))
1856
1857 (((
1858 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1859
1860
1861 )))
1862
1863 (((
1864 (% style="color:red" %)**Note:**
1865 )))
1866
1867 (((
1868 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1869 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1870 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.
1871 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
1872 )))
1873
1874 (((
1875 [[image:1653359097980-169.png||height="188" width="729"]]
1876 )))
1877
1878 (((
1879
1880 )))
1881
1882
1883 === 4.2.3 Change to Class A ===
1884
1885 If sensor JOINED
1886 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1887 ATZ
1888
1889
1890 = 5. FAQ =
1891
1892 == 5.1 How to upgrade the image? ==
1893
1894
1895 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1896
1897 * Support new features
1898 * For bug fix
1899 * Change LoRaWAN bands.
1900
1901 Below shows the hardware connection for how to upload an image to the LT:
1902
1903 [[image:1653359603330-121.png]]
1904
1905
1906 (((
1907 (% style="color:blue" %)**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]].
1908 (% style="color:blue" %)**Step2**(%%)**:** Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1909 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1910
1911
1912 (% style="color:blue" %)**For LT-22222-L**(%%):
1913 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.
1914 )))
1915
1916 [[image:image-20220524103407-12.png]]
1917
1918 [[image:image-20220524103429-13.png]]
1919
1920 [[image:image-20220524104033-15.png]]
1921
1922
1923 (% 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:
1924
1925 [[image:1653360054704-518.png||height="186" width="745"]]
1926
1927
1928 (((
1929 (((
1930
1931
1932 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1933 )))
1934 )))
1935
1936 (((
1937 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1938 )))
1939
1940 (((
1941
1942
1943 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1944 )))
1945
1946 (((
1947 (((
1948 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1949 )))
1950 )))
1951
1952 (((
1953 (((
1954 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1955
1956
1957 )))
1958 )))
1959
1960 (((
1961 (% 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.
1962 )))
1963
1964 (((
1965 [[image:1653360231087-571.png||height="401" width="727"]]
1966 )))
1967
1968 (((
1969 (% 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.
1970 )))
1971
1972
1973 (((
1974 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1975 )))
1976
1977 (((
1978 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1979 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1980 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1981 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1982 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1983 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1984 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1985 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1986 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1987 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1988 )))
1989
1990
1991 (((
1992 As shown in below:
1993 )))
1994
1995 [[image:1653360498588-932.png||height="485" width="726"]]
1996
1997
1998 == 5.4 Can I see counting event in Serial? ==
1999
2000 (((
2001 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.
2002
2003
2004 == 5.5 Can i use point to point communication for LT-22222-L? ==
2005
2006 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
2007 )))
2008
2009 (((
2010
2011
2012 = 6. Trouble Shooting =
2013 )))
2014
2015 (((
2016 (((
2017 == 6.1 Downlink doesn’t work, how to solve it? ==
2018 )))
2019 )))
2020
2021 (((
2022 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2023 )))
2024
2025 (((
2026
2027
2028 == 6.2 Have trouble to upload image. ==
2029 )))
2030
2031 (((
2032 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2033 )))
2034
2035 (((
2036
2037
2038 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2039 )))
2040
2041 (((
2042 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2043 )))
2044
2045
2046
2047 = 7. Order Info =
2048
2049
2050 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2051
2052
2053 (% style="color:#4f81bd" %)**XXX:**
2054
2055 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2056 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2057 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2058 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2059 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2060 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2061 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2062 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2063 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2064
2065 = 8. Packing Info =
2066
2067
2068 **Package Includes**:
2069
2070 * LT-22222-L I/O Controller x 1
2071 * Stick Antenna for LoRa RF part x 1
2072 * Bracket for controller x1
2073 * Program cable x 1
2074
2075 **Dimension and weight**:
2076
2077 * Device Size: 13.5 x 7 x 3 cm
2078 * Device Weight: 105g
2079 * Package Size / pcs : 14.5 x 8 x 5 cm
2080 * Weight / pcs : 170g
2081
2082 = 9. Support =
2083
2084 * (((
2085 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.
2086 )))
2087 * (((
2088 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 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2089 )))
2090
2091 = 10. Reference​​​​​ =
2092
2093 * 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]]
2094 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2095 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2096 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]

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