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Version 77.9 by Xiaoling on 2022/06/10 08:38
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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 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
289
290 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
291
292 [[image:image-20220523174024-3.png]]
293
294 (((
295 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
296 )))
297
298 [[image:image-20220523174254-4.png]]
299
300 * RO is for relay. ROx=1 : close，ROx=0 always open.
301 * DI is for digital input. DIx=1: high or float, DIx=0: low.
302 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
303
304 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
305
306 For example if payload is: [[image:image-20220523175847-2.png]]
307
308 **The value for the interface is:  **
309
310 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
311
312 AVI2 channel voltage is 0x04AC/1000=1.196V
313
314 ACI1 channel current is 0x1310/1000=4.880mA
315
316 ACI2 channel current is 0x1300/1000=4.864mA
317
318 The last byte 0xAA= 10101010(B) means
319
320 * [1] RO1 relay channel is close and the RO1 LED is ON.
321 * [0] RO2 relay channel is open and RO2 LED is OFF;
322
323 **LT22222-L:**
324
325 * [1] DI2 channel is high input and DI2 LED is ON;
326 * [0] DI1 channel is low input;
327
328 * [0] DO3 channel output state
329 ** DO3 is float in case no load between DO3 and V+.;
330 ** DO3 is high in case there is load between DO3 and V+.
331 ** DO3 LED is off in both case
332 * [1] DO2 channel output is low and DO2 LED is ON.
333 * [0] DO1 channel output state
334 ** DO1 is float in case no load between DO1 and V+.;
335 ** DO1 is high in case there is load between DO1 and V+.
336 ** DO1 LED is off in both case
337
338 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
339
340 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
341
342 (((
343 Total : 11 bytes payload
344 )))
345
346 [[image:image-20220523180452-3.png]]
347
348 (((
349 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
350 )))
351
352 [[image:image-20220523180506-4.png]]
353
354 * RO is for relay. ROx=1 : close，ROx=0 always open.
355 * FIRST: Indicate this is the first packet after join network.
356 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
357
358 (((
359 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
360 )))
361
362 (((
363 **To use counting mode, please run:**
364 )))
365
366 (% class="box infomessage" %)
367 (((
368 (((
369 **AT+MOD=2**
370 )))
371 )))
372
373 (% class="box infomessage" %)
374 (((
375 (((
376 **ATZ**
377 )))
378 )))
379
380 (((
381 (% style="color:#4f81bd" %)**AT Commands for counting:**
382 )))
383
384 (((
385 **For LT22222-L:**
386 )))
387
388 (% class="box infomessage" %)
389 (((
390 (((
391 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
392 )))
393 )))
394
395 (% class="box infomessage" %)
396 (((
397 (((
398 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
399 )))
400 )))
401
402 (% class="box infomessage" %)
403 (((
404 (((
405 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
406 )))
407 )))
408
409 (% class="box infomessage" %)
410 (((
411 (((
412 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
413 )))
414 )))
415
416 (% class="box infomessage" %)
417 (((
418 (((
419 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
420 )))
421 )))
422
423 (% class="box infomessage" %)
424 (((
425 (((
426 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
427 )))
428 )))
429
430
431 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
432
433 **LT22222-L**: This mode the DI1 is used as a counting pin.
434
435 [[image:image-20220523181246-5.png]]
436
437 (((
438 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
439 )))
440
441 [[image:image-20220523181301-6.png]]
442
443 * RO is for relay. ROx=1 : close，ROx=0 always open.
444 * FIRST: Indicate this is the first packet after join network.
445 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
446
447 (((
448 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
449 )))
450
451 (((
452 **To use counting mode, please run:**
453 )))
454
455 (% class="box infomessage" %)
456 (((
457 (((
458 **AT+MOD=3**
459 )))
460 )))
461
462 (% class="box infomessage" %)
463 (((
464 (((
465 **ATZ**
466 )))
467 )))
468
469 (((
470 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
471
472
473 )))
474
475 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
476
477 **LT22222-L**: This mode the DI1 is used as a counting pin.
478
479 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.
480
481 [[image:image-20220523181903-8.png]]
482
483 (((
484 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
485 )))
486
487 [[image:image-20220523181727-7.png]]
488
489 * RO is for relay. ROx=1 : close，ROx=0 always open.
490 * FIRST: Indicate this is the first packet after join network.
491 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
492
493 (((
494 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
495 )))
496
497 (((
498 **To use this mode, please run:**
499 )))
500
501 (% class="box infomessage" %)
502 (((
503 (((
504 **AT+MOD=4**
505 )))
506 )))
507
508 (% class="box infomessage" %)
509 (((
510 (((
511 **ATZ**
512 )))
513 )))
514
515 (((
516
517 )))
518
519 (((
520 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
521 )))
522
523 (((
524 **Plus below command for AVI1 Counting:**
525 )))
526
527 (% class="box infomessage" %)
528 (((
529 (((
530 **AT+SETCNT=3,60   (set AVI Count to 60)**
531 )))
532 )))
533
534 (% class="box infomessage" %)
535 (((
536 (((
537 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
538 )))
539 )))
540
541 (% class="box infomessage" %)
542 (((
543 (((
544 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
545 )))
546 )))
547
548 (% class="box infomessage" %)
549 (((
550 (((
551 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
552 )))
553 )))
554
555
556 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
557
558 **LT22222-L**: This mode the DI1 is used as a counting pin.
559
560 [[image:image-20220523182334-9.png]]
561
562 (((
563 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
564 )))
565
566 * RO is for relay. ROx=1 : close，ROx=0 always open.
567 * FIRST: Indicate this is the first packet after join network.
568 * (((
569 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
570 )))
571
572 (((
573 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
574 )))
575
576 (((
577 **To use this mode, please run:**
578 )))
579
580 (% class="box infomessage" %)
581 (((
582 (((
583 **AT+MOD=5**
584 )))
585 )))
586
587 (% class="box infomessage" %)
588 (((
589 (((
590 **ATZ**
591 )))
592 )))
593
594 (((
595 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
596
597
598 )))
599
600 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
601
602 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
603
604 For example, if user has configured below commands:
605
606 * **AT+MOD=1 ** **~-~->** The normal working mode
607 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
608
609 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
610
611 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
612 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.**
613
614 **AT Command to set Trigger Condition**:
615
616 (% style="color:#4f81bd" %)**Trigger base on voltage**:
617
618 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
619
620 **Example:**
621
622 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)
623
624 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
625
626
627 (% style="color:#4f81bd" %)**Trigger base on current**:
628
629 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
630
631 **Example:**
632
633 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
634
635
636 (% style="color:#4f81bd" %)**Trigger base on DI status**:
637
638 DI status trigger Flag.
639
640 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
641
642 **Example:**
643
644 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
645
646
647 **Downlink Command to set Trigger Condition**
648
649 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
650
651 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
652
653 AA: Code for this downlink Command:
654
655 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
656
657 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
658
659 yy2 yy2: AC1 or AV1 high limit.
660
661 yy3 yy3: AC2 or AV2 low limit.
662
663 Yy4 yy4: AC2 or AV2 high limit.
664
665 **Example1**: AA 00 13 88 00 00 00 00 00 00
666
667 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
668
669 **Example2**: AA 02 01 00
670
671 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
672
673 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
674
675 MOD6 Payload : total 11 bytes payload
676
677 [[image:image-20220524085923-1.png]]
678
679 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
680
681 [[image:image-20220524090106-2.png]]
682
683 * Each bits shows if the corresponding trigger has been configured.
684
685 **Example:**
686
687 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
688
689
690 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
691
692 [[image:image-20220524090249-3.png]]
693
694 * Each bits shows which status has been trigger on this uplink.
695
696 **Example:**
697
698 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
699
700
701 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
702
703 [[image:image-20220524090456-4.png]]
704
705 * Each bits shows which status has been trigger on this uplink.
706
707 **Example:**
708
709 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
710
711 00000101: Means both DI1 and DI2 trigger are enabled.
712
713
714 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
715
716 Downlink command to poll MOD6 status:
717
718 **AB 06**
719
720 When device got this command, it will send the MOD6 payload.
721
722
723 === 3.3.7 Payload Decoder ===
724
725 (((
726 **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/]]
727
728
729 )))
730
731 == 3.4 ​Configure LT via AT or Downlink ==
732
733 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
734
735 (((
736 There are two kinds of Commands:
737 )))
738
739 * (% 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]]
740
741 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
742
743 === 3.4.1 Common Commands ===
744
745 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]]
746
747
748 === 3.4.2 Sensor related commands ===
749
750 ==== 3.4.2.1 Set Transmit Interval ====
751
752 Set device uplink interval.
753
754 * AT Command:
755
756 (% class="box infomessage" %)
757 (((
758 **AT+TDC=N **
759 )))
760
761 **Example: **AT+TDC=30000. Means set interval to 30 seconds
762
763 * Downlink Payload (prefix 0x01):
764
765 (% class="box infomessage" %)
766 (((
767 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
768 )))
769
770
771 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
772
773 Set work mode.
774
775 * AT Command:
776
777 (% class="box infomessage" %)
778 (((
779 **AT+MOD=N  **
780 )))
781
782 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
783
784 * Downlink Payload (prefix 0x0A):
785
786 (% class="box infomessage" %)
787 (((
788 **0x0A aa     ~/~/ Same as AT+MOD=aa**
789 )))
790
791
792 ==== 3.4.2.3 Poll an uplink ====
793
794 * AT Command:
795
796 There is no AT Command to poll uplink
797
798 * Downlink Payload (prefix 0x08):
799
800 (% class="box infomessage" %)
801 (((
802 **0x08 FF     ~/~/ Poll an uplink,**
803 )))
804
805 **Example**: 0x08FF, ask device to send an Uplink
806
807
808 ==== 3.4.2.4 Enable Trigger Mode ====
809
810 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
811
812 * AT Command:
813
814 (% class="box infomessage" %)
815 (((
816 **AT+ADDMOD6=1 or 0**
817 )))
818
819 1: Enable Trigger Mode
820
821 0: Disable Trigger Mode
822
823 * Downlink Payload (prefix 0x0A 06):
824
825 (% class="box infomessage" %)
826 (((
827 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
828 )))
829
830
831 ==== 3.4.2.5 Poll trigger settings ====
832
833 Poll trigger settings,
834
835 * AT Command:
836
837 There is no AT Command for this feature.
838
839 * Downlink Payload (prefix 0x AB 06):
840
841 (% class="box infomessage" %)
842 (((
843 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
844 )))
845
846
847 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
848
849 Enable Disable DI1/DI2/DI2 as trigger,
850
851 * AT Command:
852
853 (% class="box infomessage" %)
854 (((
855 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
856 )))
857
858 **Example:**
859
860 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
861
862 * Downlink Payload (prefix 0xAA 02):
863
864 (% class="box infomessage" %)
865 (((
866 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
867 )))
868
869
870 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
871
872 Set DI1 or DI3(for LT-33222-L) trigger.
873
874 * AT Command:
875
876 (% class="box infomessage" %)
877 (((
878 **AT+TRIG1=a,b**
879 )))
880
881 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
882
883 b : delay timing.
884
885 **Example:**
886
887 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
888
889 * Downlink Payload (prefix 0x09 01 ):
890
891 (% class="box infomessage" %)
892 (((
893 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
894 )))
895
896
897 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
898
899 Set DI2 trigger.
900
901 * AT Command:
902
903 (% class="box infomessage" %)
904 (((
905 **AT+TRIG2=a,b**
906 )))
907
908 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
909
910 b : delay timing.
911
912 **Example:**
913
914 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
915
916 * Downlink Payload (prefix 0x09 02 ):
917
918 (% class="box infomessage" %)
919 (((
920 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
921 )))
922
923
924 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
925
926 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
927
928 * AT Command:
929
930 (% class="box infomessage" %)
931 (((
932 **AT+ACLIM. **
933 )))
934
935 * Downlink Payload (prefix 0xAA 01 ):
936
937 (% class="box infomessage" %)
938 (((
939 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
940 )))
941
942
943 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
944
945 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
946
947 * AT Command:
948
949 (% class="box infomessage" %)
950 (((
951 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
952 )))
953
954 * Downlink Payload (prefix 0xAA 00 ):
955
956 (% class="box infomessage" %)
957 (((
958 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
959 )))
960
961
962 ==== 3.4.2.11 Trigger – Set minimum interval ====
963
964 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
965
966 * AT Command:
967
968 (% class="box infomessage" %)
969 (((
970 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
971 )))
972
973 * Downlink Payload (prefix 0xAC ):
974
975 (% class="box infomessage" %)
976 (((
977 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
978 )))
979
980
981 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
982
983 * AT Command:
984
985 There is no AT Command to control Digital Output
986
987 * Downlink Payload (prefix 0x02):
988
989 (% class="box infomessage" %)
990 (((
991 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
992 )))
993
994 (((
995 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
996 )))
997
998 (((
999 01: Low,  00: High ,  11: No action
1000 )))
1001
1002 [[image:image-20220524092754-5.png]]
1003
1004 (((
1005 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1006 )))
1007
1008 (((
1009 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1010 )))
1011
1012
1013 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1014
1015 * AT Command:
1016
1017 There is no AT Command to control Digital Output
1018
1019 * Downlink Payload (prefix 0xA9):
1020
1021 (% class="box infomessage" %)
1022 (((
1023 (((
1024 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1025 )))
1026 )))
1027
1028 This is to control the digital output time of DO pin. Include four bytes:
1029
1030 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1031
1032 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1033
1034 01: DO pins will change back to original state after timeout.
1035
1036 00: DO pins will change to an inverter state after timeout 
1037
1038 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1039
1040 [[image:image-20220524093238-6.png]]
1041
1042 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1043
1044 [[image:image-20220524093328-7.png]]
1045
1046 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1047
1048 [[image:image-20220524093351-8.png]]
1049
1050 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1051
1052 Latching time. Unit: ms
1053
1054 Device will upload a packet if downlink code executes successfully.
1055
1056 **Example payload:**
1057
1058 **~1. A9 01 01 01 01 07 D0**
1059
1060 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1061
1062 **2. A9 01 00 01 11 07 D0**
1063
1064 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1065
1066 **3. A9 00 00 00 00 07 D0**
1067
1068 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1069
1070 **4. A9 00 11 01 00 07 D0**
1071
1072 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
1073
1074
1075 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1076
1077 * AT Command:
1078
1079 There is no AT Command to control Relay Output
1080
1081 * Downlink Payload (prefix 0x03):
1082
1083 (% class="box infomessage" %)
1084 (((
1085 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1086 )))
1087
1088 (((
1089 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1090 )))
1091
1092 (((
1093 01: Close ,  00: Open , 11: No action
1094 )))
1095
1096 (((
1097 [[image:image-20220524093724-9.png]]
1098 )))
1099
1100 Device will upload a packet if downlink code executes successfully.
1101
1102
1103 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1104
1105 * AT Command:
1106
1107 There is no AT Command to control Relay Output
1108
1109 * Downlink Payload (prefix 0x05):
1110
1111 (% class="box infomessage" %)
1112 (((
1113 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1114 )))
1115
1116 This is to control the relay output time of relay. Include four bytes:
1117
1118 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1119
1120 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1121
1122 01: Relays will change back to original state after timeout.
1123
1124 00: Relays will change to an inverter state after timeout
1125
1126 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1127
1128 [[image:image-20220524093831-10.png]]
1129
1130 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1131
1132 Device will upload a packet if downlink code executes successfully.
1133
1134 **Example payload:**
1135
1136 **~1. 05 01 11 07 D0**
1137
1138 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1139
1140 **2. 05 01 10 07 D0**
1141
1142 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1143
1144 **3. 05 00 01 07 D0**
1145
1146 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1147
1148 **4. 05 00 00 07 D0**
1149
1150 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1151
1152
1153 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1154
1155 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1156
1157 * AT Command:
1158
1159 (% class="box infomessage" %)
1160 (((
1161 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1162 )))
1163
1164 * Downlink Payload (prefix 0xA5):
1165
1166 (% class="box infomessage" %)
1167 (((
1168 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1169 )))
1170
1171
1172 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1173
1174 * AT Command:
1175
1176 (% class="box infomessage" %)
1177 (((
1178 **AT+SETCNT=aa,(bb cc dd ee) **
1179 )))
1180
1181 aa: 1: Set count1,
1182
1183 2: Set count2,
1184
1185 3: Set AV1 count
1186
1187 Bb cc dd ee: number to be set
1188
1189 * Downlink Payload (prefix 0xA8):
1190
1191 (% class="box infomessage" %)
1192 (((
1193 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1194 )))
1195
1196
1197 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1198
1199 Clear counting for counting mode
1200
1201 * AT Command:
1202
1203 (% class="box infomessage" %)
1204 (((
1205 **AT+CLRCOUNT ~/~/ clear all counting**
1206 )))
1207
1208 * Downlink Payload (prefix 0xA6):
1209
1210 (% class="box infomessage" %)
1211 (((
1212 **0x A6 01     ~/~/ clear all counting,**
1213 )))
1214
1215
1216 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1217
1218 * AT Command:
1219
1220 (% class="box infomessage" %)
1221 (((
1222 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1223 )))
1224
1225 * Downlink Payload (prefix 0xA7):
1226
1227 (% class="box infomessage" %)
1228 (((
1229 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1230 )))
1231
1232 (((
1233 range: aa bb cc:0 to 16777215,  (unit:second)
1234
1235
1236 )))
1237
1238 == 3.5 Integrate with Mydevice ==
1239
1240 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:
1241
1242 (((
1243 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1244 )))
1245
1246 (((
1247 **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:
1248 )))
1249
1250 [[image:1653356737703-362.png||height="232" width="732"]]
1251
1252 [[image:image-20220524094641-11.png||height="390" width="723"]]
1253
1254 [[image:image-20220524094641-12.png||height="402" width="718"]]
1255
1256
1257 **Step 3**: Create an account or log in Mydevices.
1258
1259 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1260
1261 Search under The things network
1262
1263 [[image:1653356838789-523.png||height="337" width="740"]]
1264
1265
1266 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1267
1268 [[image:image-20220524094909-1.png||height="335" width="729"]]
1269
1270 [[image:image-20220524094909-2.png||height="337" width="729"]]
1271
1272 [[image:image-20220524094909-3.png||height="338" width="727"]]
1273
1274 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1275
1276 [[image:image-20220524094909-5.png||height="341" width="734"]]
1277
1278
1279 == 3.6 Interface Detail ==
1280
1281 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1282
1283 Support NPN Type sensor
1284
1285 [[image:1653356991268-289.png]]
1286
1287
1288 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1289
1290 (((
1291 The DI port of LT-22222-L can support NPN or PNP output sensor.
1292 )))
1293
1294 (((
1295 (((
1296 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
1297 )))
1298 )))
1299
1300 [[image:1653357170703-587.png]]
1301
1302 (((
1303 (((
1304 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1305 )))
1306 )))
1307
1308 (((
1309
1310 )))
1311
1312 (((
1313 **Example1**: Connect to a Low active sensor.
1314 )))
1315
1316 (((
1317 This type of sensor will output a low signal GND when active.
1318 )))
1319
1320 * (((
1321 Connect sensor’s output to DI1-
1322 )))
1323 * (((
1324 Connect sensor’s VCC to DI1+.
1325 )))
1326
1327 (((
1328 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1329 )))
1330
1331 (((
1332 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1333 )))
1334
1335 (((
1336 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.
1337 )))
1338
1339 (((
1340
1341 )))
1342
1343 (((
1344 **Example2**: Connect to a High active sensor.
1345 )))
1346
1347 (((
1348 This type of sensor will output a high signal (example 24v) when active.
1349 )))
1350
1351 * (((
1352 Connect sensor’s output to DI1+
1353 )))
1354 * (((
1355 Connect sensor’s GND DI1-.
1356 )))
1357
1358 (((
1359 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1360 )))
1361
1362 (((
1363 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1364 )))
1365
1366 (((
1367 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.
1368 )))
1369
1370 (((
1371
1372 )))
1373
1374 (((
1375 **Example3**: Connect to a 220v high active sensor.
1376 )))
1377
1378 (((
1379 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1380 )))
1381
1382 * (((
1383 Connect sensor’s output to DI1+ with a serial 50K resistor
1384 )))
1385 * (((
1386 Connect sensor’s GND DI1-.
1387 )))
1388
1389 (((
1390 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1391 )))
1392
1393 (((
1394 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1395 )))
1396
1397 (((
1398 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.
1399 )))
1400
1401
1402 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1403
1404 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1405
1406 [[image:1653357531600-905.png]]
1407
1408
1409 === 3.6.4 Analog Input Interface ===
1410
1411 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:
1412
1413 **AC2 = (IN2 voltage )/12**
1414
1415 [[image:1653357592296-182.png]]
1416
1417 Example to connect a 4~~20mA sensor
1418
1419 We take the wind speed sensor as an example for reference only.
1420
1421 Specifications of the wind speed sensor:
1422
1423 Red:12~~24v
1424
1425 Yellow:4~~20mA
1426
1427 Black:GND
1428
1429
1430 Connection diagram:
1431
1432 [[image:1653357640609-758.png]]
1433
1434 [[image:1653357648330-671.png||height="155" width="733"]]
1435
1436
1437 === 3.6.5 Relay Output ===
1438
1439 (((
1440 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:
1441 )))
1442
1443 [[image:image-20220524100215-9.png]]
1444
1445 [[image:image-20220524100215-10.png||height="382" width="723"]]
1446
1447
1448 == 3.7 LEDs Indicators ==
1449
1450 [[image:image-20220524100748-11.png]]
1451
1452
1453 = 4. Use AT Command =
1454
1455 == 4.1 Access AT Command ==
1456
1457 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.
1458
1459 [[image:1653358238933-385.png]]
1460
1461 (((
1462 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:
1463 )))
1464
1465 [[image:1653358355238-883.png]]
1466
1467 (((
1468 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/]]
1469 )))
1470
1471 (((
1472 AT+<CMD>?        : Help on <CMD>
1473 )))
1474
1475 (((
1476 AT+<CMD>         : Run <CMD>
1477 )))
1478
1479 (((
1480 AT+<CMD>=<value> : Set the value
1481 )))
1482
1483 (((
1484 AT+<CMD>=?       : Get the value
1485 )))
1486
1487 (((
1488 ATZ: Trig a reset of the MCU
1489 )))
1490
1491 (((
1492 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1493 )))
1494
1495 (((
1496 AT+DEUI: Get or Set the Device EUI
1497 )))
1498
1499 (((
1500 AT+DADDR: Get or Set the Device Address
1501 )))
1502
1503 (((
1504 AT+APPKEY: Get or Set the Application Key
1505 )))
1506
1507 (((
1508 AT+NWKSKEY: Get or Set the Network Session Key
1509 )))
1510
1511 (((
1512 AT+APPSKEY: Get or Set the Application Session Key
1513 )))
1514
1515 (((
1516 AT+APPEUI: Get or Set the Application EUI
1517 )))
1518
1519 (((
1520 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1521 )))
1522
1523 (((
1524 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1525 )))
1526
1527 (((
1528 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1529 )))
1530
1531 (((
1532 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1533 )))
1534
1535 (((
1536 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1537 )))
1538
1539 (((
1540 AT+RX2FQ: Get or Set the Rx2 window frequency
1541 )))
1542
1543 (((
1544 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1545 )))
1546
1547 (((
1548 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1549 )))
1550
1551 (((
1552 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1553 )))
1554
1555 (((
1556 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1557 )))
1558
1559 (((
1560 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1561 )))
1562
1563 (((
1564 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1565 )))
1566
1567 (((
1568 AT+NWKID: Get or Set the Network ID
1569 )))
1570
1571 (((
1572 AT+FCU: Get or Set the Frame Counter Uplink
1573 )))
1574
1575 (((
1576 AT+FCD: Get or Set the Frame Counter Downlink
1577 )))
1578
1579 (((
1580 AT+CLASS: Get or Set the Device Class
1581 )))
1582
1583 (((
1584 AT+JOIN: Join network
1585 )))
1586
1587 (((
1588 AT+NJS: Get OTAA Join Status
1589 )))
1590
1591 (((
1592 AT+SENDB: Send hexadecimal data along with the application port
1593 )))
1594
1595 (((
1596 AT+SEND: Send text data along with the application port
1597 )))
1598
1599 (((
1600 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1601 )))
1602
1603 (((
1604 AT+RECV: Print last received data in raw format
1605 )))
1606
1607 (((
1608 AT+VER: Get current image version and Frequency Band
1609 )))
1610
1611 (((
1612 AT+CFM: Get or Set the confirmation mode (0-1)
1613 )))
1614
1615 (((
1616 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1617 )))
1618
1619 (((
1620 AT+SNR: Get the SNR of the last received packet
1621 )))
1622
1623 (((
1624 AT+RSSI: Get the RSSI of the last received packet
1625 )))
1626
1627 (((
1628 AT+TDC: Get or set the application data transmission interval in ms
1629 )))
1630
1631 (((
1632 AT+PORT: Get or set the application port
1633 )))
1634
1635 (((
1636 AT+DISAT: Disable AT commands
1637 )))
1638
1639 (((
1640 AT+PWORD: Set password, max 9 digits
1641 )))
1642
1643 (((
1644 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1645 )))
1646
1647 (((
1648 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1649 )))
1650
1651 (((
1652 AT+CFG: Print all settings
1653
1654
1655 )))
1656
1657 == 4.2 Common AT Command Sequence ==
1658
1659 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1660
1661 (((
1662 If device has not joined network yet:
1663 )))
1664
1665 (((
1666 (% style="background-color:#dcdcdc" %)123456
1667 )))
1668
1669 (((
1670 (% style="background-color:#dcdcdc" %)AT+FDR
1671 )))
1672
1673 (((
1674 (% style="background-color:#dcdcdc" %)123456
1675 )))
1676
1677 (((
1678 (% style="background-color:#dcdcdc" %)AT+NJM=0
1679 )))
1680
1681 (((
1682 (% style="background-color:#dcdcdc" %)ATZ
1683 )))
1684
1685
1686 (((
1687 If device already joined network:
1688 )))
1689
1690 (((
1691 (% style="background-color:#dcdcdc" %)AT+NJM=0
1692 )))
1693
1694 (((
1695 (% style="background-color:#dcdcdc" %)ATZ
1696
1697
1698 )))
1699
1700 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1701
1702 (((
1703 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1704 )))
1705
1706 (((
1707 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1708 )))
1709
1710 (((
1711 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1712 )))
1713
1714 (((
1715 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1716 )))
1717
1718 (((
1719 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1720 )))
1721
1722 (((
1723 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1724 )))
1725
1726 (((
1727 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1728 )))
1729
1730 (((
1731 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1732 )))
1733
1734 (((
1735 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1736 )))
1737
1738 (((
1739 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1740 )))
1741
1742 (((
1743 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1744 )))
1745
1746 (((
1747 (% 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.
1748 )))
1749
1750 (((
1751 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1752 )))
1753
1754 (((
1755 (% style="color:red" %)**Note:**
1756 )))
1757
1758 (((
1759 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1760 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1761 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.
1762 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
1763 )))
1764
1765 (((
1766 [[image:1653359097980-169.png||height="188" width="729"]]
1767 )))
1768
1769 (((
1770
1771 )))
1772
1773 === 4.2.3 Change to Class A ===
1774
1775 If sensor JOINED
1776 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1777 ATZ
1778
1779
1780 = 5. FAQ =
1781
1782 == 5.1 How to upgrade the image? ==
1783
1784 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1785
1786 * Support new features
1787 * For bug fix
1788 * Change LoRaWAN bands.
1789 Below shows the hardware connection for how to upload an image to the LT:
1790 * [[image:1653359603330-121.png]]
1791
1792 (((
1793 **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]].
1794 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1795 **Step3: **Open flashloader; choose the correct COM port to update.
1796 **For LT-22222-L**:
1797 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.
1798 )))
1799
1800 [[image:image-20220524103407-12.png]]
1801
1802 [[image:image-20220524103429-13.png]]
1803
1804 [[image:image-20220524104033-15.png]]
1805
1806 (% 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:
1807
1808 [[image:1653360054704-518.png||height="186" width="745"]]
1809
1810
1811 (((
1812 (((
1813 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1814 )))
1815 )))
1816
1817 (((
1818 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1819
1820
1821 )))
1822
1823 (((
1824 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1825 )))
1826
1827 (((
1828 (((
1829 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1830 )))
1831 )))
1832
1833 (((
1834 (((
1835 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1836 )))
1837 )))
1838
1839 (((
1840 (% 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.
1841 )))
1842
1843 (((
1844 [[image:1653360231087-571.png||height="401" width="727"]]
1845 )))
1846
1847 (((
1848 (% 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.
1849 )))
1850
1851 (((
1852 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1853 )))
1854
1855 (((
1856 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1857 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1858 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1859 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1860 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1861 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1862 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1863 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1864 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1865 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1866 )))
1867
1868 (((
1869 As shown in below:
1870 )))
1871
1872 [[image:1653360498588-932.png||height="485" width="726"]]
1873
1874
1875 == 5.4 Can I see counting event in Serial? ==
1876
1877 (((
1878 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.
1879
1880
1881 == 5.5 Can i use point to point communication for LT-22222-L? ==
1882
1883 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1884
1885
1886 )))
1887
1888 (((
1889 = 6. Trouble Shooting =
1890 )))
1891
1892 (((
1893 (((
1894 == 6.1 Downlink doesn’t work, how to solve it? ==
1895 )))
1896 )))
1897
1898 (((
1899 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1900
1901
1902 )))
1903
1904 (((
1905 == 6.2 Have trouble to upload image. ==
1906 )))
1907
1908 (((
1909 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1910 )))
1911
1912 (((
1913
1914 )))
1915
1916 (((
1917 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1918 )))
1919
1920 (((
1921 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1922 )))
1923
1924 (((
1925
1926 )))
1927
1928 (((
1929 = 7. Order Info =
1930 )))
1931
1932 (((
1933 (((
1934 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1935 )))
1936 )))
1937
1938 (((
1939 (((
1940 (% style="color:#4f81bd" %)**XXX:**
1941 )))
1942 )))
1943
1944 (((
1945 * (((
1946 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1947 )))
1948 )))
1949
1950 (((
1951 * (((
1952 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1953 )))
1954 )))
1955
1956 (((
1957 * (((
1958 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1959 )))
1960 )))
1961
1962 (((
1963 * (((
1964 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1965 )))
1966 )))
1967
1968 (((
1969 * (((
1970 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1971 )))
1972 )))
1973
1974 (((
1975 * (((
1976 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1977 )))
1978 )))
1979
1980 (((
1981 * (((
1982 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1983 )))
1984 )))
1985
1986 (((
1987 * (((
1988 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1989 )))
1990 )))
1991
1992 (((
1993 * (((
1994 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1995
1996
1997 )))
1998
1999 = 8. Packing Info =
2000 )))
2001
2002 (((
2003 (((
2004 **Package Includes**:
2005 )))
2006 )))
2007
2008 (((
2009 (((
2010 * LT-22222-L I/O Controller x 1
2011 * Stick Antenna for LoRa RF part x 1
2012 * Bracket for controller x1
2013 * Program cable x 1
2014 )))
2015 )))
2016
2017 (((
2018 (((
2019 **Dimension and weight**:
2020 )))
2021 )))
2022
2023 (((
2024 (((
2025 * Device Size: 13.5 x 7 x 3 cm
2026 * Device Weight: 105g
2027 * Package Size / pcs : 14.5 x 8 x 5 cm
2028 * Weight / pcs : 170g
2029
2030
2031 )))
2032 )))
2033
2034 (((
2035 = 9. Support =
2036 )))
2037
2038 * (((
2039 (((
2040 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.
2041 )))
2042 )))
2043 * (((
2044 (((
2045 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
2046 )))
2047 )))
2048
2049 (((
2050 (((
2051 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2052
2053
2054 )))
2055
2056 (((
2057 = 10. Reference​​​​​ =
2058
2059 * Product Page:
2060
2061 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]]
2062
2063 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2064 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2065 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2066 )))
2067 )))