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Version 77.17 by Xiaoling on 2022/06/10 08:40
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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
610
611 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
612
613 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
614
615 For example, if user has configured below commands:
616
617 * **AT+MOD=1 ** **~-~->** The normal working mode
618 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
619
620 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
621
622 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
623 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.**
624
625 **AT Command to set Trigger Condition**:
626
627 (% style="color:#4f81bd" %)**Trigger base on voltage**:
628
629 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
630
631 **Example:**
632
633 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)
634
635 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
636
637
638 (% style="color:#4f81bd" %)**Trigger base on current**:
639
640 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
641
642 **Example:**
643
644 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
645
646
647 (% style="color:#4f81bd" %)**Trigger base on DI status**:
648
649 DI status trigger Flag.
650
651 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
652
653 **Example:**
654
655 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
656
657
658 **Downlink Command to set Trigger Condition**
659
660 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
661
662 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
663
664 AA: Code for this downlink Command:
665
666 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
667
668 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
669
670 yy2 yy2: AC1 or AV1 high limit.
671
672 yy3 yy3: AC2 or AV2 low limit.
673
674 Yy4 yy4: AC2 or AV2 high limit.
675
676 **Example1**: AA 00 13 88 00 00 00 00 00 00
677
678 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
679
680 **Example2**: AA 02 01 00
681
682 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
683
684 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
685
686 MOD6 Payload : total 11 bytes payload
687
688 [[image:image-20220524085923-1.png]]
689
690 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
691
692 [[image:image-20220524090106-2.png]]
693
694 * Each bits shows if the corresponding trigger has been configured.
695
696 **Example:**
697
698 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
699
700
701 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
702
703 [[image:image-20220524090249-3.png]]
704
705 * Each bits shows which status has been trigger on this uplink.
706
707 **Example:**
708
709 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
710
711
712 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
713
714 [[image:image-20220524090456-4.png]]
715
716 * Each bits shows which status has been trigger on this uplink.
717
718 **Example:**
719
720 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
721
722 00000101: Means both DI1 and DI2 trigger are enabled.
723
724
725 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
726
727 Downlink command to poll MOD6 status:
728
729 **AB 06**
730
731 When device got this command, it will send the MOD6 payload.
732
733
734
735 === 3.3.7 Payload Decoder ===
736
737 (((
738 **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/]]
739
740
741 )))
742
743 == 3.4 ​Configure LT via AT or Downlink ==
744
745 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
746
747 (((
748 There are two kinds of Commands:
749 )))
750
751 * (% 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]]
752
753 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
754
755 === 3.4.1 Common Commands ===
756
757 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]]
758
759
760 === 3.4.2 Sensor related commands ===
761
762 ==== 3.4.2.1 Set Transmit Interval ====
763
764 Set device uplink interval.
765
766 * AT Command:
767
768 (% class="box infomessage" %)
769 (((
770 **AT+TDC=N **
771 )))
772
773 **Example: **AT+TDC=30000. Means set interval to 30 seconds
774
775 * Downlink Payload (prefix 0x01):
776
777 (% class="box infomessage" %)
778 (((
779 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
780 )))
781
782
783 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
784
785 Set work mode.
786
787 * AT Command:
788
789 (% class="box infomessage" %)
790 (((
791 **AT+MOD=N  **
792 )))
793
794 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
795
796 * Downlink Payload (prefix 0x0A):
797
798 (% class="box infomessage" %)
799 (((
800 **0x0A aa     ~/~/ Same as AT+MOD=aa**
801 )))
802
803
804 ==== 3.4.2.3 Poll an uplink ====
805
806 * AT Command:
807
808 There is no AT Command to poll uplink
809
810 * Downlink Payload (prefix 0x08):
811
812 (% class="box infomessage" %)
813 (((
814 **0x08 FF     ~/~/ Poll an uplink,**
815 )))
816
817 **Example**: 0x08FF, ask device to send an Uplink
818
819
820 ==== 3.4.2.4 Enable Trigger Mode ====
821
822 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
823
824 * AT Command:
825
826 (% class="box infomessage" %)
827 (((
828 **AT+ADDMOD6=1 or 0**
829 )))
830
831 1: Enable Trigger Mode
832
833 0: Disable Trigger Mode
834
835 * Downlink Payload (prefix 0x0A 06):
836
837 (% class="box infomessage" %)
838 (((
839 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
840 )))
841
842
843 ==== 3.4.2.5 Poll trigger settings ====
844
845 Poll trigger settings,
846
847 * AT Command:
848
849 There is no AT Command for this feature.
850
851 * Downlink Payload (prefix 0x AB 06):
852
853 (% class="box infomessage" %)
854 (((
855 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
856 )))
857
858
859 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
860
861 Enable Disable DI1/DI2/DI2 as trigger,
862
863 * AT Command:
864
865 (% class="box infomessage" %)
866 (((
867 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
868 )))
869
870 **Example:**
871
872 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
873
874 * Downlink Payload (prefix 0xAA 02):
875
876 (% class="box infomessage" %)
877 (((
878 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
879 )))
880
881
882 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
883
884 Set DI1 or DI3(for LT-33222-L) trigger.
885
886 * AT Command:
887
888 (% class="box infomessage" %)
889 (((
890 **AT+TRIG1=a,b**
891 )))
892
893 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
894
895 b : delay timing.
896
897 **Example:**
898
899 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
900
901 * Downlink Payload (prefix 0x09 01 ):
902
903 (% class="box infomessage" %)
904 (((
905 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
906 )))
907
908
909 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
910
911 Set DI2 trigger.
912
913 * AT Command:
914
915 (% class="box infomessage" %)
916 (((
917 **AT+TRIG2=a,b**
918 )))
919
920 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
921
922 b : delay timing.
923
924 **Example:**
925
926 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
927
928 * Downlink Payload (prefix 0x09 02 ):
929
930 (% class="box infomessage" %)
931 (((
932 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
933 )))
934
935
936 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
937
938 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
939
940 * AT Command:
941
942 (% class="box infomessage" %)
943 (((
944 **AT+ACLIM. **
945 )))
946
947 * Downlink Payload (prefix 0xAA 01 ):
948
949 (% class="box infomessage" %)
950 (((
951 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
952 )))
953
954
955 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
956
957 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
958
959 * AT Command:
960
961 (% class="box infomessage" %)
962 (((
963 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
964 )))
965
966 * Downlink Payload (prefix 0xAA 00 ):
967
968 (% class="box infomessage" %)
969 (((
970 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
971 )))
972
973
974 ==== 3.4.2.11 Trigger – Set minimum interval ====
975
976 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
977
978 * AT Command:
979
980 (% class="box infomessage" %)
981 (((
982 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
983 )))
984
985 * Downlink Payload (prefix 0xAC ):
986
987 (% class="box infomessage" %)
988 (((
989 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
990 )))
991
992
993 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
994
995 * AT Command:
996
997 There is no AT Command to control Digital Output
998
999 * Downlink Payload (prefix 0x02):
1000
1001 (% class="box infomessage" %)
1002 (((
1003 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1004 )))
1005
1006 (((
1007 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1008 )))
1009
1010 (((
1011 01: Low,  00: High ,  11: No action
1012 )))
1013
1014 [[image:image-20220524092754-5.png]]
1015
1016 (((
1017 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1018 )))
1019
1020 (((
1021 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1022 )))
1023
1024
1025 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1026
1027 * AT Command:
1028
1029 There is no AT Command to control Digital Output
1030
1031 * Downlink Payload (prefix 0xA9):
1032
1033 (% class="box infomessage" %)
1034 (((
1035 (((
1036 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1037 )))
1038 )))
1039
1040 This is to control the digital output time of DO pin. Include four bytes:
1041
1042 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1043
1044 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1045
1046 01: DO pins will change back to original state after timeout.
1047
1048 00: DO pins will change to an inverter state after timeout 
1049
1050 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1051
1052 [[image:image-20220524093238-6.png]]
1053
1054 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1055
1056 [[image:image-20220524093328-7.png]]
1057
1058 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1059
1060 [[image:image-20220524093351-8.png]]
1061
1062 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1063
1064 Latching time. Unit: ms
1065
1066 Device will upload a packet if downlink code executes successfully.
1067
1068 **Example payload:**
1069
1070 **~1. A9 01 01 01 01 07 D0**
1071
1072 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1073
1074 **2. A9 01 00 01 11 07 D0**
1075
1076 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1077
1078 **3. A9 00 00 00 00 07 D0**
1079
1080 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1081
1082 **4. A9 00 11 01 00 07 D0**
1083
1084 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
1085
1086
1087 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1088
1089 * AT Command:
1090
1091 There is no AT Command to control Relay Output
1092
1093 * Downlink Payload (prefix 0x03):
1094
1095 (% class="box infomessage" %)
1096 (((
1097 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1098 )))
1099
1100 (((
1101 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1102 )))
1103
1104 (((
1105 01: Close ,  00: Open , 11: No action
1106 )))
1107
1108 (((
1109 [[image:image-20220524093724-9.png]]
1110 )))
1111
1112 Device will upload a packet if downlink code executes successfully.
1113
1114
1115 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1116
1117 * AT Command:
1118
1119 There is no AT Command to control Relay Output
1120
1121 * Downlink Payload (prefix 0x05):
1122
1123 (% class="box infomessage" %)
1124 (((
1125 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1126 )))
1127
1128 This is to control the relay output time of relay. Include four bytes:
1129
1130 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1131
1132 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1133
1134 01: Relays will change back to original state after timeout.
1135
1136 00: Relays will change to an inverter state after timeout
1137
1138 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1139
1140 [[image:image-20220524093831-10.png]]
1141
1142 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1143
1144 Device will upload a packet if downlink code executes successfully.
1145
1146 **Example payload:**
1147
1148 **~1. 05 01 11 07 D0**
1149
1150 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1151
1152 **2. 05 01 10 07 D0**
1153
1154 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1155
1156 **3. 05 00 01 07 D0**
1157
1158 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1159
1160 **4. 05 00 00 07 D0**
1161
1162 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1163
1164
1165 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1166
1167 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1168
1169 * AT Command:
1170
1171 (% class="box infomessage" %)
1172 (((
1173 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1174 )))
1175
1176 * Downlink Payload (prefix 0xA5):
1177
1178 (% class="box infomessage" %)
1179 (((
1180 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1181 )))
1182
1183
1184 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1185
1186 * AT Command:
1187
1188 (% class="box infomessage" %)
1189 (((
1190 **AT+SETCNT=aa,(bb cc dd ee) **
1191 )))
1192
1193 aa: 1: Set count1,
1194
1195 2: Set count2,
1196
1197 3: Set AV1 count
1198
1199 Bb cc dd ee: number to be set
1200
1201 * Downlink Payload (prefix 0xA8):
1202
1203 (% class="box infomessage" %)
1204 (((
1205 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1206 )))
1207
1208
1209 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1210
1211 Clear counting for counting mode
1212
1213 * AT Command:
1214
1215 (% class="box infomessage" %)
1216 (((
1217 **AT+CLRCOUNT ~/~/ clear all counting**
1218 )))
1219
1220 * Downlink Payload (prefix 0xA6):
1221
1222 (% class="box infomessage" %)
1223 (((
1224 **0x A6 01     ~/~/ clear all counting,**
1225 )))
1226
1227
1228 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1229
1230 * AT Command:
1231
1232 (% class="box infomessage" %)
1233 (((
1234 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1235 )))
1236
1237 * Downlink Payload (prefix 0xA7):
1238
1239 (% class="box infomessage" %)
1240 (((
1241 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1242 )))
1243
1244 (((
1245 range: aa bb cc:0 to 16777215,  (unit:second)
1246
1247
1248 )))
1249
1250 == 3.5 Integrate with Mydevice ==
1251
1252 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:
1253
1254 (((
1255 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1256 )))
1257
1258 (((
1259 **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:
1260 )))
1261
1262 [[image:1653356737703-362.png||height="232" width="732"]]
1263
1264 [[image:image-20220524094641-11.png||height="390" width="723"]]
1265
1266 [[image:image-20220524094641-12.png||height="402" width="718"]]
1267
1268
1269 **Step 3**: Create an account or log in Mydevices.
1270
1271 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1272
1273 Search under The things network
1274
1275 [[image:1653356838789-523.png||height="337" width="740"]]
1276
1277
1278 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1279
1280 [[image:image-20220524094909-1.png||height="335" width="729"]]
1281
1282 [[image:image-20220524094909-2.png||height="337" width="729"]]
1283
1284 [[image:image-20220524094909-3.png||height="338" width="727"]]
1285
1286 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1287
1288 [[image:image-20220524094909-5.png||height="341" width="734"]]
1289
1290
1291 == 3.6 Interface Detail ==
1292
1293 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1294
1295 Support NPN Type sensor
1296
1297 [[image:1653356991268-289.png]]
1298
1299
1300 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1301
1302 (((
1303 The DI port of LT-22222-L can support NPN or PNP output sensor.
1304 )))
1305
1306 (((
1307 (((
1308 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
1309 )))
1310 )))
1311
1312 [[image:1653357170703-587.png]]
1313
1314 (((
1315 (((
1316 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1317 )))
1318 )))
1319
1320 (((
1321
1322 )))
1323
1324 (((
1325 **Example1**: Connect to a Low active sensor.
1326 )))
1327
1328 (((
1329 This type of sensor will output a low signal GND when active.
1330 )))
1331
1332 * (((
1333 Connect sensor’s output to DI1-
1334 )))
1335 * (((
1336 Connect sensor’s VCC to DI1+.
1337 )))
1338
1339 (((
1340 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1341 )))
1342
1343 (((
1344 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1345 )))
1346
1347 (((
1348 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.
1349 )))
1350
1351 (((
1352
1353 )))
1354
1355 (((
1356 **Example2**: Connect to a High active sensor.
1357 )))
1358
1359 (((
1360 This type of sensor will output a high signal (example 24v) when active.
1361 )))
1362
1363 * (((
1364 Connect sensor’s output to DI1+
1365 )))
1366 * (((
1367 Connect sensor’s GND DI1-.
1368 )))
1369
1370 (((
1371 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1372 )))
1373
1374 (((
1375 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1376 )))
1377
1378 (((
1379 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.
1380 )))
1381
1382 (((
1383
1384 )))
1385
1386 (((
1387 **Example3**: Connect to a 220v high active sensor.
1388 )))
1389
1390 (((
1391 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1392 )))
1393
1394 * (((
1395 Connect sensor’s output to DI1+ with a serial 50K resistor
1396 )))
1397 * (((
1398 Connect sensor’s GND DI1-.
1399 )))
1400
1401 (((
1402 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1403 )))
1404
1405 (((
1406 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1407 )))
1408
1409 (((
1410 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.
1411 )))
1412
1413
1414 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1415
1416 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1417
1418 [[image:1653357531600-905.png]]
1419
1420
1421 === 3.6.4 Analog Input Interface ===
1422
1423 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:
1424
1425 **AC2 = (IN2 voltage )/12**
1426
1427 [[image:1653357592296-182.png]]
1428
1429 Example to connect a 4~~20mA sensor
1430
1431 We take the wind speed sensor as an example for reference only.
1432
1433 Specifications of the wind speed sensor:
1434
1435 Red:12~~24v
1436
1437 Yellow:4~~20mA
1438
1439 Black:GND
1440
1441
1442 Connection diagram:
1443
1444 [[image:1653357640609-758.png]]
1445
1446 [[image:1653357648330-671.png||height="155" width="733"]]
1447
1448
1449 === 3.6.5 Relay Output ===
1450
1451 (((
1452 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:
1453 )))
1454
1455 [[image:image-20220524100215-9.png]]
1456
1457 [[image:image-20220524100215-10.png||height="382" width="723"]]
1458
1459
1460 == 3.7 LEDs Indicators ==
1461
1462 [[image:image-20220524100748-11.png]]
1463
1464
1465 = 4. Use AT Command =
1466
1467 == 4.1 Access AT Command ==
1468
1469 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.
1470
1471 [[image:1653358238933-385.png]]
1472
1473 (((
1474 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:
1475 )))
1476
1477 [[image:1653358355238-883.png]]
1478
1479 (((
1480 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/]]
1481 )))
1482
1483 (((
1484 AT+<CMD>?        : Help on <CMD>
1485 )))
1486
1487 (((
1488 AT+<CMD>         : Run <CMD>
1489 )))
1490
1491 (((
1492 AT+<CMD>=<value> : Set the value
1493 )))
1494
1495 (((
1496 AT+<CMD>=?       : Get the value
1497 )))
1498
1499 (((
1500 ATZ: Trig a reset of the MCU
1501 )))
1502
1503 (((
1504 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1505 )))
1506
1507 (((
1508 AT+DEUI: Get or Set the Device EUI
1509 )))
1510
1511 (((
1512 AT+DADDR: Get or Set the Device Address
1513 )))
1514
1515 (((
1516 AT+APPKEY: Get or Set the Application Key
1517 )))
1518
1519 (((
1520 AT+NWKSKEY: Get or Set the Network Session Key
1521 )))
1522
1523 (((
1524 AT+APPSKEY: Get or Set the Application Session Key
1525 )))
1526
1527 (((
1528 AT+APPEUI: Get or Set the Application EUI
1529 )))
1530
1531 (((
1532 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1533 )))
1534
1535 (((
1536 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1537 )))
1538
1539 (((
1540 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1541 )))
1542
1543 (((
1544 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1545 )))
1546
1547 (((
1548 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1549 )))
1550
1551 (((
1552 AT+RX2FQ: Get or Set the Rx2 window frequency
1553 )))
1554
1555 (((
1556 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1557 )))
1558
1559 (((
1560 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1561 )))
1562
1563 (((
1564 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1565 )))
1566
1567 (((
1568 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1569 )))
1570
1571 (((
1572 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1573 )))
1574
1575 (((
1576 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1577 )))
1578
1579 (((
1580 AT+NWKID: Get or Set the Network ID
1581 )))
1582
1583 (((
1584 AT+FCU: Get or Set the Frame Counter Uplink
1585 )))
1586
1587 (((
1588 AT+FCD: Get or Set the Frame Counter Downlink
1589 )))
1590
1591 (((
1592 AT+CLASS: Get or Set the Device Class
1593 )))
1594
1595 (((
1596 AT+JOIN: Join network
1597 )))
1598
1599 (((
1600 AT+NJS: Get OTAA Join Status
1601 )))
1602
1603 (((
1604 AT+SENDB: Send hexadecimal data along with the application port
1605 )))
1606
1607 (((
1608 AT+SEND: Send text data along with the application port
1609 )))
1610
1611 (((
1612 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1613 )))
1614
1615 (((
1616 AT+RECV: Print last received data in raw format
1617 )))
1618
1619 (((
1620 AT+VER: Get current image version and Frequency Band
1621 )))
1622
1623 (((
1624 AT+CFM: Get or Set the confirmation mode (0-1)
1625 )))
1626
1627 (((
1628 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1629 )))
1630
1631 (((
1632 AT+SNR: Get the SNR of the last received packet
1633 )))
1634
1635 (((
1636 AT+RSSI: Get the RSSI of the last received packet
1637 )))
1638
1639 (((
1640 AT+TDC: Get or set the application data transmission interval in ms
1641 )))
1642
1643 (((
1644 AT+PORT: Get or set the application port
1645 )))
1646
1647 (((
1648 AT+DISAT: Disable AT commands
1649 )))
1650
1651 (((
1652 AT+PWORD: Set password, max 9 digits
1653 )))
1654
1655 (((
1656 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1657 )))
1658
1659 (((
1660 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1661 )))
1662
1663 (((
1664 AT+CFG: Print all settings
1665
1666
1667 )))
1668
1669 == 4.2 Common AT Command Sequence ==
1670
1671 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1672
1673 (((
1674 If device has not joined network yet:
1675 )))
1676
1677 (((
1678 (% style="background-color:#dcdcdc" %)123456
1679 )))
1680
1681 (((
1682 (% style="background-color:#dcdcdc" %)AT+FDR
1683 )))
1684
1685 (((
1686 (% style="background-color:#dcdcdc" %)123456
1687 )))
1688
1689 (((
1690 (% style="background-color:#dcdcdc" %)AT+NJM=0
1691 )))
1692
1693 (((
1694 (% style="background-color:#dcdcdc" %)ATZ
1695 )))
1696
1697
1698 (((
1699 If device already joined network:
1700 )))
1701
1702 (((
1703 (% style="background-color:#dcdcdc" %)AT+NJM=0
1704 )))
1705
1706 (((
1707 (% style="background-color:#dcdcdc" %)ATZ
1708
1709
1710 )))
1711
1712 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1713
1714 (((
1715 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1716 )))
1717
1718 (((
1719 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1720 )))
1721
1722 (((
1723 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1724 )))
1725
1726 (((
1727 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1728 )))
1729
1730 (((
1731 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1732 )))
1733
1734 (((
1735 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1736 )))
1737
1738 (((
1739 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1740 )))
1741
1742 (((
1743 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1744 )))
1745
1746 (((
1747 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1748 )))
1749
1750 (((
1751 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1752 )))
1753
1754 (((
1755 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1756 )))
1757
1758 (((
1759 (% 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.
1760 )))
1761
1762 (((
1763 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1764 )))
1765
1766 (((
1767 (% style="color:red" %)**Note:**
1768 )))
1769
1770 (((
1771 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1772 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1773 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.
1774 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
1775 )))
1776
1777 (((
1778 [[image:1653359097980-169.png||height="188" width="729"]]
1779 )))
1780
1781 (((
1782
1783 )))
1784
1785 === 4.2.3 Change to Class A ===
1786
1787 If sensor JOINED
1788 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1789 ATZ
1790
1791
1792 = 5. FAQ =
1793
1794 == 5.1 How to upgrade the image? ==
1795
1796 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1797
1798 * Support new features
1799 * For bug fix
1800 * Change LoRaWAN bands.
1801 Below shows the hardware connection for how to upload an image to the LT:
1802 * [[image:1653359603330-121.png]]
1803
1804 (((
1805 **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]].
1806 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1807 **Step3: **Open flashloader; choose the correct COM port to update.
1808 **For LT-22222-L**:
1809 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.
1810 )))
1811
1812 [[image:image-20220524103407-12.png]]
1813
1814 [[image:image-20220524103429-13.png]]
1815
1816 [[image:image-20220524104033-15.png]]
1817
1818 (% 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:
1819
1820 [[image:1653360054704-518.png||height="186" width="745"]]
1821
1822
1823 (((
1824 (((
1825 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1826 )))
1827 )))
1828
1829 (((
1830 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1831
1832
1833 )))
1834
1835 (((
1836 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1837 )))
1838
1839 (((
1840 (((
1841 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1842 )))
1843 )))
1844
1845 (((
1846 (((
1847 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1848 )))
1849 )))
1850
1851 (((
1852 (% 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.
1853 )))
1854
1855 (((
1856 [[image:1653360231087-571.png||height="401" width="727"]]
1857 )))
1858
1859 (((
1860 (% 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.
1861 )))
1862
1863 (((
1864 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1865 )))
1866
1867 (((
1868 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1869 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1870 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1871 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1872 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1873 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1874 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1875 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1876 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1877 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1878 )))
1879
1880 (((
1881 As shown in below:
1882 )))
1883
1884 [[image:1653360498588-932.png||height="485" width="726"]]
1885
1886
1887 == 5.4 Can I see counting event in Serial? ==
1888
1889 (((
1890 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.
1891
1892
1893 == 5.5 Can i use point to point communication for LT-22222-L? ==
1894
1895 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1896
1897
1898 )))
1899
1900 (((
1901 = 6. Trouble Shooting =
1902 )))
1903
1904 (((
1905 (((
1906 == 6.1 Downlink doesn’t work, how to solve it? ==
1907 )))
1908 )))
1909
1910 (((
1911 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1912
1913
1914 )))
1915
1916 (((
1917 == 6.2 Have trouble to upload image. ==
1918 )))
1919
1920 (((
1921 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1922 )))
1923
1924 (((
1925
1926 )))
1927
1928 (((
1929 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1930 )))
1931
1932 (((
1933 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1934 )))
1935
1936 (((
1937
1938 )))
1939
1940 (((
1941 = 7. Order Info =
1942 )))
1943
1944 (((
1945 (((
1946 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1947 )))
1948 )))
1949
1950 (((
1951 (((
1952 (% style="color:#4f81bd" %)**XXX:**
1953 )))
1954 )))
1955
1956 (((
1957 * (((
1958 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1959 )))
1960 )))
1961
1962 (((
1963 * (((
1964 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1965 )))
1966 )))
1967
1968 (((
1969 * (((
1970 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1971 )))
1972 )))
1973
1974 (((
1975 * (((
1976 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1977 )))
1978 )))
1979
1980 (((
1981 * (((
1982 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1983 )))
1984 )))
1985
1986 (((
1987 * (((
1988 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1989 )))
1990 )))
1991
1992 (((
1993 * (((
1994 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1995 )))
1996 )))
1997
1998 (((
1999 * (((
2000 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2001 )))
2002 )))
2003
2004 (((
2005 * (((
2006 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2007
2008
2009 )))
2010
2011 = 8. Packing Info =
2012 )))
2013
2014 (((
2015 (((
2016 **Package Includes**:
2017 )))
2018 )))
2019
2020 (((
2021 (((
2022 * LT-22222-L I/O Controller x 1
2023 * Stick Antenna for LoRa RF part x 1
2024 * Bracket for controller x1
2025 * Program cable x 1
2026 )))
2027 )))
2028
2029 (((
2030 (((
2031 **Dimension and weight**:
2032 )))
2033 )))
2034
2035 (((
2036 (((
2037 * Device Size: 13.5 x 7 x 3 cm
2038 * Device Weight: 105g
2039 * Package Size / pcs : 14.5 x 8 x 5 cm
2040 * Weight / pcs : 170g
2041
2042
2043 )))
2044 )))
2045
2046 (((
2047 = 9. Support =
2048 )))
2049
2050 * (((
2051 (((
2052 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.
2053 )))
2054 )))
2055 * (((
2056 (((
2057 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
2058 )))
2059 )))
2060
2061 (((
2062 (((
2063 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2064
2065
2066 )))
2067
2068 (((
2069 = 10. Reference​​​​​ =
2070
2071 * Product Page:
2072
2073 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]]
2074
2075 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2076 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2077 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2078 )))
2079 )))