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Version 77.15 by Xiaoling on 2022/06/10 08:39
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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 (((
80 **Interface for Model: LT22222-L:**
81 )))
82
83 * (((
84 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
85 )))
86 * (((
87 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
88 )))
89 * (((
90 2 x Relay Output (5A@250VAC / 30VDC)
91 )))
92 * (((
93 2 x 0~~20mA Analog Input (res:0.01mA)
94 )))
95 * (((
96 2 x 0~~30V Analog Input (res:0.01v)
97 )))
98 * (((
99 Power Input 7~~ 24V DC. 
100 )))
101
102
103 (((
104 **LoRa Spec:**
105 )))
106
107 * (((
108 (((
109 Frequency Range:
110 )))
111
112 * (((
113 Band 1 (HF): 862 ~~ 1020 Mhz
114 )))
115 * (((
116 Band 2 (LF): 410 ~~ 528 Mhz
117 )))
118 )))
119 * (((
120 168 dB maximum link budget.
121 )))
122 * (((
123 +20 dBm - 100 mW constant RF output vs.
124 )))
125 * (((
126 +14 dBm high efficiency PA.
127 )))
128 * (((
129 Programmable bit rate up to 300 kbps.
130 )))
131 * (((
132 High sensitivity: down to -148 dBm.
133 )))
134 * (((
135 Bullet-proof front end: IIP3 = -12.5 dBm.
136 )))
137 * (((
138 Excellent blocking immunity.
139 )))
140 * (((
141 Low RX current of 10.3 mA, 200 nA register retention.
142 )))
143 * (((
144 Fully integrated synthesizer with a resolution of 61 Hz.
145 )))
146 * (((
147 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
148 )))
149 * (((
150 Built-in bit synchronizer for clock recovery.
151 )))
152 * (((
153 Preamble detection.
154 )))
155 * (((
156 127 dB Dynamic Range RSSI.
157 )))
158 * (((
159 Automatic RF Sense and CAD with ultra-fast AFC.
160 )))
161 * (((
162 Packet engine up to 256 bytes with CRC.
163
164
165 )))
166
167
168
169 == 1.3 Features ==
170
171 * LoRaWAN Class A & Class C protocol
172 * Optional Customized LoRa Protocol
173 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
174 * AT Commands to change parameters
175 * Remote configure parameters via LoRa Downlink
176 * Firmware upgradable via program port
177 * Counting
178
179
180
181 == 1.4  Applications ==
182
183 * Smart Buildings & Home Automation
184 * Logistics and Supply Chain Management
185 * Smart Metering
186 * Smart Agriculture
187 * Smart Cities
188 * Smart Factory
189
190
191
192 == 1.5 Hardware Variants ==
193
194 (% border="1" style="background-color:#f7faff; width:500px" %)
195 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
196 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
197 * 2 x Digital Input (Bi-direction)
198 * 2 x Digital Output
199 * 2 x Relay Output (5A@250VAC / 30VDC)
200 * 2 x 0~~20mA Analog Input (res:0.01mA)
201 * 2 x 0~~30V Analog Input (res:0.01v)
202 * 1 x Counting Port
203 )))
204
205
206
207 = 2. Power ON Device =
208
209 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.
210
211 (((
212 PWR will on when device is properly powered.
213 )))
214
215 [[image:1653297104069-180.png]]
216
217
218
219 = 3. Operation Mode =
220
221 == 3.1 How it works? ==
222
223 (((
224 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. 
225 )))
226
227 (((
228 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.
229
230
231 )))
232
233
234
235 == 3.2 Example to join LoRaWAN network ==
236
237 (((
238 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. 
239 )))
240
241 [[image:image-20220523172350-1.png||height="266" width="864"]]
242
243 (((
244 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:
245 )))
246
247 (((
248 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
249 )))
250
251 (((
252 Each LT is shipped with a sticker with the default device EUI as below:
253 )))
254
255 [[image:1653297924498-393.png]]
256
257 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
258
259 Add APP EUI in the application.
260
261 [[image:1653297955910-247.png||height="321" width="716"]]
262
263
264 Add APP KEY and DEV EUI
265
266 [[image:1653298023685-319.png]]
267
268
269 (((
270 **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.
271 )))
272
273 [[image:1653298044601-602.png||height="405" width="709"]]
274
275
276
277 == 3.3 Uplink Payload ==
278
279 There are five working modes + one interrupt mode on LT for different type application:
280
281 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
282 * **MOD2**: Double DI Counting + DO + RO
283 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
284 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
285 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
286 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
287
288
289
290 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
291
292 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
293
294 [[image:image-20220523174024-3.png]]
295
296 (((
297 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
298 )))
299
300 [[image:image-20220523174254-4.png]]
301
302 * RO is for relay. ROx=1 : close，ROx=0 always open.
303 * DI is for digital input. DIx=1: high or float, DIx=0: low.
304 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
305
306 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
307
308 For example if payload is: [[image:image-20220523175847-2.png]]
309
310 **The value for the interface is:  **
311
312 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
313
314 AVI2 channel voltage is 0x04AC/1000=1.196V
315
316 ACI1 channel current is 0x1310/1000=4.880mA
317
318 ACI2 channel current is 0x1300/1000=4.864mA
319
320 The last byte 0xAA= 10101010(B) means
321
322 * [1] RO1 relay channel is close and the RO1 LED is ON.
323 * [0] RO2 relay channel is open and RO2 LED is OFF;
324
325
326 **LT22222-L:**
327
328 * [1] DI2 channel is high input and DI2 LED is ON;
329 * [0] DI1 channel is low input;
330
331 * [0] DO3 channel output state
332 ** DO3 is float in case no load between DO3 and V+.;
333 ** DO3 is high in case there is load between DO3 and V+.
334 ** DO3 LED is off in both case
335 * [1] DO2 channel output is low and DO2 LED is ON.
336 * [0] DO1 channel output state
337 ** DO1 is float in case no load between DO1 and V+.;
338 ** DO1 is high in case there is load between DO1 and V+.
339 ** DO1 LED is off in both case
340
341
342
343 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
344
345 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
346
347 (((
348 Total : 11 bytes payload
349 )))
350
351 [[image:image-20220523180452-3.png]]
352
353 (((
354 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
355 )))
356
357 [[image:image-20220523180506-4.png]]
358
359 * RO is for relay. ROx=1 : close，ROx=0 always open.
360 * FIRST: Indicate this is the first packet after join network.
361 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
362
363 (((
364 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
365 )))
366
367 (((
368 **To use counting mode, please run:**
369 )))
370
371 (% class="box infomessage" %)
372 (((
373 (((
374 **AT+MOD=2**
375 )))
376 )))
377
378 (% class="box infomessage" %)
379 (((
380 (((
381 **ATZ**
382 )))
383 )))
384
385 (((
386 (% style="color:#4f81bd" %)**AT Commands for counting:**
387 )))
388
389 (((
390 **For LT22222-L:**
391 )))
392
393 (% class="box infomessage" %)
394 (((
395 (((
396 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
397 )))
398 )))
399
400 (% class="box infomessage" %)
401 (((
402 (((
403 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
404 )))
405 )))
406
407 (% class="box infomessage" %)
408 (((
409 (((
410 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
411 )))
412 )))
413
414 (% class="box infomessage" %)
415 (((
416 (((
417 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
418 )))
419 )))
420
421 (% class="box infomessage" %)
422 (((
423 (((
424 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
425 )))
426 )))
427
428 (% class="box infomessage" %)
429 (((
430 (((
431 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
432 )))
433 )))
434
435
436
437 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
438
439 **LT22222-L**: This mode the DI1 is used as a counting pin.
440
441 [[image:image-20220523181246-5.png]]
442
443 (((
444 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
445 )))
446
447 [[image:image-20220523181301-6.png]]
448
449 * RO is for relay. ROx=1 : close，ROx=0 always open.
450 * FIRST: Indicate this is the first packet after join network.
451 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
452
453 (((
454 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
455 )))
456
457 (((
458 **To use counting mode, please run:**
459 )))
460
461 (% class="box infomessage" %)
462 (((
463 (((
464 **AT+MOD=3**
465 )))
466 )))
467
468 (% class="box infomessage" %)
469 (((
470 (((
471 **ATZ**
472 )))
473 )))
474
475 (((
476 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
477
478
479 )))
480
481
482
483 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
484
485 **LT22222-L**: This mode the DI1 is used as a counting pin.
486
487 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.
488
489 [[image:image-20220523181903-8.png]]
490
491 (((
492 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
493 )))
494
495 [[image:image-20220523181727-7.png]]
496
497 * RO is for relay. ROx=1 : close，ROx=0 always open.
498 * FIRST: Indicate this is the first packet after join network.
499 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
500
501 (((
502 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
503 )))
504
505 (((
506 **To use this mode, please run:**
507 )))
508
509 (% class="box infomessage" %)
510 (((
511 (((
512 **AT+MOD=4**
513 )))
514 )))
515
516 (% class="box infomessage" %)
517 (((
518 (((
519 **ATZ**
520 )))
521 )))
522
523 (((
524
525 )))
526
527 (((
528 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
529 )))
530
531 (((
532 **Plus below command for AVI1 Counting:**
533 )))
534
535 (% class="box infomessage" %)
536 (((
537 (((
538 **AT+SETCNT=3,60   (set AVI Count to 60)**
539 )))
540 )))
541
542 (% class="box infomessage" %)
543 (((
544 (((
545 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
546 )))
547 )))
548
549 (% class="box infomessage" %)
550 (((
551 (((
552 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
553 )))
554 )))
555
556 (% class="box infomessage" %)
557 (((
558 (((
559 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
560 )))
561 )))
562
563
564
565 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
566
567 **LT22222-L**: This mode the DI1 is used as a counting pin.
568
569 [[image:image-20220523182334-9.png]]
570
571 (((
572 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
573 )))
574
575 * RO is for relay. ROx=1 : close，ROx=0 always open.
576 * FIRST: Indicate this is the first packet after join network.
577 * (((
578 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
579 )))
580
581 (((
582 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
583 )))
584
585 (((
586 **To use this mode, please run:**
587 )))
588
589 (% class="box infomessage" %)
590 (((
591 (((
592 **AT+MOD=5**
593 )))
594 )))
595
596 (% class="box infomessage" %)
597 (((
598 (((
599 **ATZ**
600 )))
601 )))
602
603 (((
604 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
605
606
607 )))
608
609 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
610
611 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
612
613 For example, if user has configured below commands:
614
615 * **AT+MOD=1 ** **~-~->** The normal working mode
616 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
617
618 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
619
620 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
621 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.**
622
623 **AT Command to set Trigger Condition**:
624
625 (% style="color:#4f81bd" %)**Trigger base on voltage**:
626
627 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
628
629 **Example:**
630
631 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)
632
633 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
634
635
636 (% style="color:#4f81bd" %)**Trigger base on current**:
637
638 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
639
640 **Example:**
641
642 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
643
644
645 (% style="color:#4f81bd" %)**Trigger base on DI status**:
646
647 DI status trigger Flag.
648
649 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
650
651 **Example:**
652
653 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
654
655
656 **Downlink Command to set Trigger Condition**
657
658 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
659
660 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
661
662 AA: Code for this downlink Command:
663
664 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
665
666 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
667
668 yy2 yy2: AC1 or AV1 high limit.
669
670 yy3 yy3: AC2 or AV2 low limit.
671
672 Yy4 yy4: AC2 or AV2 high limit.
673
674 **Example1**: AA 00 13 88 00 00 00 00 00 00
675
676 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
677
678 **Example2**: AA 02 01 00
679
680 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
681
682 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
683
684 MOD6 Payload : total 11 bytes payload
685
686 [[image:image-20220524085923-1.png]]
687
688 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
689
690 [[image:image-20220524090106-2.png]]
691
692 * Each bits shows if the corresponding trigger has been configured.
693
694 **Example:**
695
696 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
697
698
699 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
700
701 [[image:image-20220524090249-3.png]]
702
703 * Each bits shows which status has been trigger on this uplink.
704
705 **Example:**
706
707 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
708
709
710 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
711
712 [[image:image-20220524090456-4.png]]
713
714 * Each bits shows which status has been trigger on this uplink.
715
716 **Example:**
717
718 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
719
720 00000101: Means both DI1 and DI2 trigger are enabled.
721
722
723 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
724
725 Downlink command to poll MOD6 status:
726
727 **AB 06**
728
729 When device got this command, it will send the MOD6 payload.
730
731
732 === 3.3.7 Payload Decoder ===
733
734 (((
735 **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/]]
736
737
738 )))
739
740 == 3.4 ​Configure LT via AT or Downlink ==
741
742 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
743
744 (((
745 There are two kinds of Commands:
746 )))
747
748 * (% 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]]
749
750 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
751
752 === 3.4.1 Common Commands ===
753
754 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]]
755
756
757 === 3.4.2 Sensor related commands ===
758
759 ==== 3.4.2.1 Set Transmit Interval ====
760
761 Set device uplink interval.
762
763 * AT Command:
764
765 (% class="box infomessage" %)
766 (((
767 **AT+TDC=N **
768 )))
769
770 **Example: **AT+TDC=30000. Means set interval to 30 seconds
771
772 * Downlink Payload (prefix 0x01):
773
774 (% class="box infomessage" %)
775 (((
776 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
777 )))
778
779
780 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
781
782 Set work mode.
783
784 * AT Command:
785
786 (% class="box infomessage" %)
787 (((
788 **AT+MOD=N  **
789 )))
790
791 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
792
793 * Downlink Payload (prefix 0x0A):
794
795 (% class="box infomessage" %)
796 (((
797 **0x0A aa     ~/~/ Same as AT+MOD=aa**
798 )))
799
800
801 ==== 3.4.2.3 Poll an uplink ====
802
803 * AT Command:
804
805 There is no AT Command to poll uplink
806
807 * Downlink Payload (prefix 0x08):
808
809 (% class="box infomessage" %)
810 (((
811 **0x08 FF     ~/~/ Poll an uplink,**
812 )))
813
814 **Example**: 0x08FF, ask device to send an Uplink
815
816
817 ==== 3.4.2.4 Enable Trigger Mode ====
818
819 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
820
821 * AT Command:
822
823 (% class="box infomessage" %)
824 (((
825 **AT+ADDMOD6=1 or 0**
826 )))
827
828 1: Enable Trigger Mode
829
830 0: Disable Trigger Mode
831
832 * Downlink Payload (prefix 0x0A 06):
833
834 (% class="box infomessage" %)
835 (((
836 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
837 )))
838
839
840 ==== 3.4.2.5 Poll trigger settings ====
841
842 Poll trigger settings,
843
844 * AT Command:
845
846 There is no AT Command for this feature.
847
848 * Downlink Payload (prefix 0x AB 06):
849
850 (% class="box infomessage" %)
851 (((
852 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
853 )))
854
855
856 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
857
858 Enable Disable DI1/DI2/DI2 as trigger,
859
860 * AT Command:
861
862 (% class="box infomessage" %)
863 (((
864 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
865 )))
866
867 **Example:**
868
869 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
870
871 * Downlink Payload (prefix 0xAA 02):
872
873 (% class="box infomessage" %)
874 (((
875 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
876 )))
877
878
879 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
880
881 Set DI1 or DI3(for LT-33222-L) trigger.
882
883 * AT Command:
884
885 (% class="box infomessage" %)
886 (((
887 **AT+TRIG1=a,b**
888 )))
889
890 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
891
892 b : delay timing.
893
894 **Example:**
895
896 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
897
898 * Downlink Payload (prefix 0x09 01 ):
899
900 (% class="box infomessage" %)
901 (((
902 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
903 )))
904
905
906 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
907
908 Set DI2 trigger.
909
910 * AT Command:
911
912 (% class="box infomessage" %)
913 (((
914 **AT+TRIG2=a,b**
915 )))
916
917 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
918
919 b : delay timing.
920
921 **Example:**
922
923 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
924
925 * Downlink Payload (prefix 0x09 02 ):
926
927 (% class="box infomessage" %)
928 (((
929 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
930 )))
931
932
933 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
934
935 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
936
937 * AT Command:
938
939 (% class="box infomessage" %)
940 (((
941 **AT+ACLIM. **
942 )))
943
944 * Downlink Payload (prefix 0xAA 01 ):
945
946 (% class="box infomessage" %)
947 (((
948 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
949 )))
950
951
952 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
953
954 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
955
956 * AT Command:
957
958 (% class="box infomessage" %)
959 (((
960 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
961 )))
962
963 * Downlink Payload (prefix 0xAA 00 ):
964
965 (% class="box infomessage" %)
966 (((
967 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
968 )))
969
970
971 ==== 3.4.2.11 Trigger – Set minimum interval ====
972
973 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
974
975 * AT Command:
976
977 (% class="box infomessage" %)
978 (((
979 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
980 )))
981
982 * Downlink Payload (prefix 0xAC ):
983
984 (% class="box infomessage" %)
985 (((
986 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
987 )))
988
989
990 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
991
992 * AT Command:
993
994 There is no AT Command to control Digital Output
995
996 * Downlink Payload (prefix 0x02):
997
998 (% class="box infomessage" %)
999 (((
1000 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1001 )))
1002
1003 (((
1004 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1005 )))
1006
1007 (((
1008 01: Low,  00: High ,  11: No action
1009 )))
1010
1011 [[image:image-20220524092754-5.png]]
1012
1013 (((
1014 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1015 )))
1016
1017 (((
1018 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1019 )))
1020
1021
1022 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1023
1024 * AT Command:
1025
1026 There is no AT Command to control Digital Output
1027
1028 * Downlink Payload (prefix 0xA9):
1029
1030 (% class="box infomessage" %)
1031 (((
1032 (((
1033 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1034 )))
1035 )))
1036
1037 This is to control the digital output time of DO pin. Include four bytes:
1038
1039 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1040
1041 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1042
1043 01: DO pins will change back to original state after timeout.
1044
1045 00: DO pins will change to an inverter state after timeout 
1046
1047 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1048
1049 [[image:image-20220524093238-6.png]]
1050
1051 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1052
1053 [[image:image-20220524093328-7.png]]
1054
1055 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1056
1057 [[image:image-20220524093351-8.png]]
1058
1059 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1060
1061 Latching time. Unit: ms
1062
1063 Device will upload a packet if downlink code executes successfully.
1064
1065 **Example payload:**
1066
1067 **~1. A9 01 01 01 01 07 D0**
1068
1069 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1070
1071 **2. A9 01 00 01 11 07 D0**
1072
1073 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1074
1075 **3. A9 00 00 00 00 07 D0**
1076
1077 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1078
1079 **4. A9 00 11 01 00 07 D0**
1080
1081 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
1082
1083
1084 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1085
1086 * AT Command:
1087
1088 There is no AT Command to control Relay Output
1089
1090 * Downlink Payload (prefix 0x03):
1091
1092 (% class="box infomessage" %)
1093 (((
1094 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1095 )))
1096
1097 (((
1098 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1099 )))
1100
1101 (((
1102 01: Close ,  00: Open , 11: No action
1103 )))
1104
1105 (((
1106 [[image:image-20220524093724-9.png]]
1107 )))
1108
1109 Device will upload a packet if downlink code executes successfully.
1110
1111
1112 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1113
1114 * AT Command:
1115
1116 There is no AT Command to control Relay Output
1117
1118 * Downlink Payload (prefix 0x05):
1119
1120 (% class="box infomessage" %)
1121 (((
1122 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1123 )))
1124
1125 This is to control the relay output time of relay. Include four bytes:
1126
1127 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1128
1129 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1130
1131 01: Relays will change back to original state after timeout.
1132
1133 00: Relays will change to an inverter state after timeout
1134
1135 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1136
1137 [[image:image-20220524093831-10.png]]
1138
1139 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1140
1141 Device will upload a packet if downlink code executes successfully.
1142
1143 **Example payload:**
1144
1145 **~1. 05 01 11 07 D0**
1146
1147 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1148
1149 **2. 05 01 10 07 D0**
1150
1151 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1152
1153 **3. 05 00 01 07 D0**
1154
1155 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1156
1157 **4. 05 00 00 07 D0**
1158
1159 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1160
1161
1162 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1163
1164 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1165
1166 * AT Command:
1167
1168 (% class="box infomessage" %)
1169 (((
1170 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1171 )))
1172
1173 * Downlink Payload (prefix 0xA5):
1174
1175 (% class="box infomessage" %)
1176 (((
1177 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1178 )))
1179
1180
1181 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1182
1183 * AT Command:
1184
1185 (% class="box infomessage" %)
1186 (((
1187 **AT+SETCNT=aa,(bb cc dd ee) **
1188 )))
1189
1190 aa: 1: Set count1,
1191
1192 2: Set count2,
1193
1194 3: Set AV1 count
1195
1196 Bb cc dd ee: number to be set
1197
1198 * Downlink Payload (prefix 0xA8):
1199
1200 (% class="box infomessage" %)
1201 (((
1202 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1203 )))
1204
1205
1206 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1207
1208 Clear counting for counting mode
1209
1210 * AT Command:
1211
1212 (% class="box infomessage" %)
1213 (((
1214 **AT+CLRCOUNT ~/~/ clear all counting**
1215 )))
1216
1217 * Downlink Payload (prefix 0xA6):
1218
1219 (% class="box infomessage" %)
1220 (((
1221 **0x A6 01     ~/~/ clear all counting,**
1222 )))
1223
1224
1225 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1226
1227 * AT Command:
1228
1229 (% class="box infomessage" %)
1230 (((
1231 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1232 )))
1233
1234 * Downlink Payload (prefix 0xA7):
1235
1236 (% class="box infomessage" %)
1237 (((
1238 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1239 )))
1240
1241 (((
1242 range: aa bb cc:0 to 16777215,  (unit:second)
1243
1244
1245 )))
1246
1247 == 3.5 Integrate with Mydevice ==
1248
1249 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:
1250
1251 (((
1252 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1253 )))
1254
1255 (((
1256 **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:
1257 )))
1258
1259 [[image:1653356737703-362.png||height="232" width="732"]]
1260
1261 [[image:image-20220524094641-11.png||height="390" width="723"]]
1262
1263 [[image:image-20220524094641-12.png||height="402" width="718"]]
1264
1265
1266 **Step 3**: Create an account or log in Mydevices.
1267
1268 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1269
1270 Search under The things network
1271
1272 [[image:1653356838789-523.png||height="337" width="740"]]
1273
1274
1275 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1276
1277 [[image:image-20220524094909-1.png||height="335" width="729"]]
1278
1279 [[image:image-20220524094909-2.png||height="337" width="729"]]
1280
1281 [[image:image-20220524094909-3.png||height="338" width="727"]]
1282
1283 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1284
1285 [[image:image-20220524094909-5.png||height="341" width="734"]]
1286
1287
1288 == 3.6 Interface Detail ==
1289
1290 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1291
1292 Support NPN Type sensor
1293
1294 [[image:1653356991268-289.png]]
1295
1296
1297 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1298
1299 (((
1300 The DI port of LT-22222-L can support NPN or PNP output sensor.
1301 )))
1302
1303 (((
1304 (((
1305 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
1306 )))
1307 )))
1308
1309 [[image:1653357170703-587.png]]
1310
1311 (((
1312 (((
1313 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1314 )))
1315 )))
1316
1317 (((
1318
1319 )))
1320
1321 (((
1322 **Example1**: Connect to a Low active sensor.
1323 )))
1324
1325 (((
1326 This type of sensor will output a low signal GND when active.
1327 )))
1328
1329 * (((
1330 Connect sensor’s output to DI1-
1331 )))
1332 * (((
1333 Connect sensor’s VCC to DI1+.
1334 )))
1335
1336 (((
1337 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1338 )))
1339
1340 (((
1341 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1342 )))
1343
1344 (((
1345 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.
1346 )))
1347
1348 (((
1349
1350 )))
1351
1352 (((
1353 **Example2**: Connect to a High active sensor.
1354 )))
1355
1356 (((
1357 This type of sensor will output a high signal (example 24v) when active.
1358 )))
1359
1360 * (((
1361 Connect sensor’s output to DI1+
1362 )))
1363 * (((
1364 Connect sensor’s GND DI1-.
1365 )))
1366
1367 (((
1368 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1369 )))
1370
1371 (((
1372 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1373 )))
1374
1375 (((
1376 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.
1377 )))
1378
1379 (((
1380
1381 )))
1382
1383 (((
1384 **Example3**: Connect to a 220v high active sensor.
1385 )))
1386
1387 (((
1388 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1389 )))
1390
1391 * (((
1392 Connect sensor’s output to DI1+ with a serial 50K resistor
1393 )))
1394 * (((
1395 Connect sensor’s GND DI1-.
1396 )))
1397
1398 (((
1399 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1400 )))
1401
1402 (((
1403 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1404 )))
1405
1406 (((
1407 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.
1408 )))
1409
1410
1411 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1412
1413 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1414
1415 [[image:1653357531600-905.png]]
1416
1417
1418 === 3.6.4 Analog Input Interface ===
1419
1420 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:
1421
1422 **AC2 = (IN2 voltage )/12**
1423
1424 [[image:1653357592296-182.png]]
1425
1426 Example to connect a 4~~20mA sensor
1427
1428 We take the wind speed sensor as an example for reference only.
1429
1430 Specifications of the wind speed sensor:
1431
1432 Red:12~~24v
1433
1434 Yellow:4~~20mA
1435
1436 Black:GND
1437
1438
1439 Connection diagram:
1440
1441 [[image:1653357640609-758.png]]
1442
1443 [[image:1653357648330-671.png||height="155" width="733"]]
1444
1445
1446 === 3.6.5 Relay Output ===
1447
1448 (((
1449 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:
1450 )))
1451
1452 [[image:image-20220524100215-9.png]]
1453
1454 [[image:image-20220524100215-10.png||height="382" width="723"]]
1455
1456
1457 == 3.7 LEDs Indicators ==
1458
1459 [[image:image-20220524100748-11.png]]
1460
1461
1462 = 4. Use AT Command =
1463
1464 == 4.1 Access AT Command ==
1465
1466 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.
1467
1468 [[image:1653358238933-385.png]]
1469
1470 (((
1471 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:
1472 )))
1473
1474 [[image:1653358355238-883.png]]
1475
1476 (((
1477 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/]]
1478 )))
1479
1480 (((
1481 AT+<CMD>?        : Help on <CMD>
1482 )))
1483
1484 (((
1485 AT+<CMD>         : Run <CMD>
1486 )))
1487
1488 (((
1489 AT+<CMD>=<value> : Set the value
1490 )))
1491
1492 (((
1493 AT+<CMD>=?       : Get the value
1494 )))
1495
1496 (((
1497 ATZ: Trig a reset of the MCU
1498 )))
1499
1500 (((
1501 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1502 )))
1503
1504 (((
1505 AT+DEUI: Get or Set the Device EUI
1506 )))
1507
1508 (((
1509 AT+DADDR: Get or Set the Device Address
1510 )))
1511
1512 (((
1513 AT+APPKEY: Get or Set the Application Key
1514 )))
1515
1516 (((
1517 AT+NWKSKEY: Get or Set the Network Session Key
1518 )))
1519
1520 (((
1521 AT+APPSKEY: Get or Set the Application Session Key
1522 )))
1523
1524 (((
1525 AT+APPEUI: Get or Set the Application EUI
1526 )))
1527
1528 (((
1529 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1530 )))
1531
1532 (((
1533 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1534 )))
1535
1536 (((
1537 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1538 )))
1539
1540 (((
1541 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1542 )))
1543
1544 (((
1545 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1546 )))
1547
1548 (((
1549 AT+RX2FQ: Get or Set the Rx2 window frequency
1550 )))
1551
1552 (((
1553 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1554 )))
1555
1556 (((
1557 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1558 )))
1559
1560 (((
1561 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1562 )))
1563
1564 (((
1565 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1566 )))
1567
1568 (((
1569 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1570 )))
1571
1572 (((
1573 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1574 )))
1575
1576 (((
1577 AT+NWKID: Get or Set the Network ID
1578 )))
1579
1580 (((
1581 AT+FCU: Get or Set the Frame Counter Uplink
1582 )))
1583
1584 (((
1585 AT+FCD: Get or Set the Frame Counter Downlink
1586 )))
1587
1588 (((
1589 AT+CLASS: Get or Set the Device Class
1590 )))
1591
1592 (((
1593 AT+JOIN: Join network
1594 )))
1595
1596 (((
1597 AT+NJS: Get OTAA Join Status
1598 )))
1599
1600 (((
1601 AT+SENDB: Send hexadecimal data along with the application port
1602 )))
1603
1604 (((
1605 AT+SEND: Send text data along with the application port
1606 )))
1607
1608 (((
1609 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1610 )))
1611
1612 (((
1613 AT+RECV: Print last received data in raw format
1614 )))
1615
1616 (((
1617 AT+VER: Get current image version and Frequency Band
1618 )))
1619
1620 (((
1621 AT+CFM: Get or Set the confirmation mode (0-1)
1622 )))
1623
1624 (((
1625 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1626 )))
1627
1628 (((
1629 AT+SNR: Get the SNR of the last received packet
1630 )))
1631
1632 (((
1633 AT+RSSI: Get the RSSI of the last received packet
1634 )))
1635
1636 (((
1637 AT+TDC: Get or set the application data transmission interval in ms
1638 )))
1639
1640 (((
1641 AT+PORT: Get or set the application port
1642 )))
1643
1644 (((
1645 AT+DISAT: Disable AT commands
1646 )))
1647
1648 (((
1649 AT+PWORD: Set password, max 9 digits
1650 )))
1651
1652 (((
1653 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1654 )))
1655
1656 (((
1657 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1658 )))
1659
1660 (((
1661 AT+CFG: Print all settings
1662
1663
1664 )))
1665
1666 == 4.2 Common AT Command Sequence ==
1667
1668 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1669
1670 (((
1671 If device has not joined network yet:
1672 )))
1673
1674 (((
1675 (% style="background-color:#dcdcdc" %)123456
1676 )))
1677
1678 (((
1679 (% style="background-color:#dcdcdc" %)AT+FDR
1680 )))
1681
1682 (((
1683 (% style="background-color:#dcdcdc" %)123456
1684 )))
1685
1686 (((
1687 (% style="background-color:#dcdcdc" %)AT+NJM=0
1688 )))
1689
1690 (((
1691 (% style="background-color:#dcdcdc" %)ATZ
1692 )))
1693
1694
1695 (((
1696 If device already joined network:
1697 )))
1698
1699 (((
1700 (% style="background-color:#dcdcdc" %)AT+NJM=0
1701 )))
1702
1703 (((
1704 (% style="background-color:#dcdcdc" %)ATZ
1705
1706
1707 )))
1708
1709 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1710
1711 (((
1712 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1713 )))
1714
1715 (((
1716 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1717 )))
1718
1719 (((
1720 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1721 )))
1722
1723 (((
1724 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1725 )))
1726
1727 (((
1728 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1729 )))
1730
1731 (((
1732 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1733 )))
1734
1735 (((
1736 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1737 )))
1738
1739 (((
1740 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1741 )))
1742
1743 (((
1744 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1745 )))
1746
1747 (((
1748 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1749 )))
1750
1751 (((
1752 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1753 )))
1754
1755 (((
1756 (% 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.
1757 )))
1758
1759 (((
1760 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1761 )))
1762
1763 (((
1764 (% style="color:red" %)**Note:**
1765 )))
1766
1767 (((
1768 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1769 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1770 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.
1771 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
1772 )))
1773
1774 (((
1775 [[image:1653359097980-169.png||height="188" width="729"]]
1776 )))
1777
1778 (((
1779
1780 )))
1781
1782 === 4.2.3 Change to Class A ===
1783
1784 If sensor JOINED
1785 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1786 ATZ
1787
1788
1789 = 5. FAQ =
1790
1791 == 5.1 How to upgrade the image? ==
1792
1793 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1794
1795 * Support new features
1796 * For bug fix
1797 * Change LoRaWAN bands.
1798 Below shows the hardware connection for how to upload an image to the LT:
1799 * [[image:1653359603330-121.png]]
1800
1801 (((
1802 **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]].
1803 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1804 **Step3: **Open flashloader; choose the correct COM port to update.
1805 **For LT-22222-L**:
1806 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.
1807 )))
1808
1809 [[image:image-20220524103407-12.png]]
1810
1811 [[image:image-20220524103429-13.png]]
1812
1813 [[image:image-20220524104033-15.png]]
1814
1815 (% 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:
1816
1817 [[image:1653360054704-518.png||height="186" width="745"]]
1818
1819
1820 (((
1821 (((
1822 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1823 )))
1824 )))
1825
1826 (((
1827 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1828
1829
1830 )))
1831
1832 (((
1833 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1834 )))
1835
1836 (((
1837 (((
1838 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1839 )))
1840 )))
1841
1842 (((
1843 (((
1844 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1845 )))
1846 )))
1847
1848 (((
1849 (% 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.
1850 )))
1851
1852 (((
1853 [[image:1653360231087-571.png||height="401" width="727"]]
1854 )))
1855
1856 (((
1857 (% 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.
1858 )))
1859
1860 (((
1861 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1862 )))
1863
1864 (((
1865 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1866 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1867 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1868 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1869 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1870 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1871 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1872 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1873 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1874 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1875 )))
1876
1877 (((
1878 As shown in below:
1879 )))
1880
1881 [[image:1653360498588-932.png||height="485" width="726"]]
1882
1883
1884 == 5.4 Can I see counting event in Serial? ==
1885
1886 (((
1887 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.
1888
1889
1890 == 5.5 Can i use point to point communication for LT-22222-L? ==
1891
1892 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1893
1894
1895 )))
1896
1897 (((
1898 = 6. Trouble Shooting =
1899 )))
1900
1901 (((
1902 (((
1903 == 6.1 Downlink doesn’t work, how to solve it? ==
1904 )))
1905 )))
1906
1907 (((
1908 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1909
1910
1911 )))
1912
1913 (((
1914 == 6.2 Have trouble to upload image. ==
1915 )))
1916
1917 (((
1918 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1919 )))
1920
1921 (((
1922
1923 )))
1924
1925 (((
1926 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1927 )))
1928
1929 (((
1930 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1931 )))
1932
1933 (((
1934
1935 )))
1936
1937 (((
1938 = 7. Order Info =
1939 )))
1940
1941 (((
1942 (((
1943 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1944 )))
1945 )))
1946
1947 (((
1948 (((
1949 (% style="color:#4f81bd" %)**XXX:**
1950 )))
1951 )))
1952
1953 (((
1954 * (((
1955 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1956 )))
1957 )))
1958
1959 (((
1960 * (((
1961 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1962 )))
1963 )))
1964
1965 (((
1966 * (((
1967 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1968 )))
1969 )))
1970
1971 (((
1972 * (((
1973 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1974 )))
1975 )))
1976
1977 (((
1978 * (((
1979 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1980 )))
1981 )))
1982
1983 (((
1984 * (((
1985 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1986 )))
1987 )))
1988
1989 (((
1990 * (((
1991 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1992 )))
1993 )))
1994
1995 (((
1996 * (((
1997 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1998 )))
1999 )))
2000
2001 (((
2002 * (((
2003 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2004
2005
2006 )))
2007
2008 = 8. Packing Info =
2009 )))
2010
2011 (((
2012 (((
2013 **Package Includes**:
2014 )))
2015 )))
2016
2017 (((
2018 (((
2019 * LT-22222-L I/O Controller x 1
2020 * Stick Antenna for LoRa RF part x 1
2021 * Bracket for controller x1
2022 * Program cable x 1
2023 )))
2024 )))
2025
2026 (((
2027 (((
2028 **Dimension and weight**:
2029 )))
2030 )))
2031
2032 (((
2033 (((
2034 * Device Size: 13.5 x 7 x 3 cm
2035 * Device Weight: 105g
2036 * Package Size / pcs : 14.5 x 8 x 5 cm
2037 * Weight / pcs : 170g
2038
2039
2040 )))
2041 )))
2042
2043 (((
2044 = 9. Support =
2045 )))
2046
2047 * (((
2048 (((
2049 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.
2050 )))
2051 )))
2052 * (((
2053 (((
2054 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
2055 )))
2056 )))
2057
2058 (((
2059 (((
2060 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2061
2062
2063 )))
2064
2065 (((
2066 = 10. Reference​​​​​ =
2067
2068 * Product Page:
2069
2070 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]]
2071
2072 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2073 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2074 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2075 )))
2076 )))