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Version 77.2 by Xiaoling on 2022/06/10 08:37
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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 **Hardware System:**
55 )))
56
57 * (((
58 STM32L072CZT6 MCU
59 )))
60 * (((
61 SX1276/78 Wireless Chip 
62 )))
63 * (((
64 (((
65 Power Consumption:
66 )))
67
68 * (((
69 Idle: 4mA@12v
70 )))
71 * (((
72 20dB Transmit: 34mA@12v
73 )))
74 )))
75
76 (((
77 **Interface for Model: LT22222-L:**
78 )))
79
80 * (((
81 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
82 )))
83 * (((
84 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
85 )))
86 * (((
87 2 x Relay Output (5A@250VAC / 30VDC)
88 )))
89 * (((
90 2 x 0~~20mA Analog Input (res:0.01mA)
91 )))
92 * (((
93 2 x 0~~30V Analog Input (res:0.01v)
94 )))
95 * (((
96 Power Input 7~~ 24V DC. 
97 )))
98
99 (((
100 **LoRa Spec:**
101 )))
102
103 * (((
104 (((
105 Frequency Range:
106 )))
107
108 * (((
109 Band 1 (HF): 862 ~~ 1020 Mhz
110 )))
111 * (((
112 Band 2 (LF): 410 ~~ 528 Mhz
113 )))
114 )))
115 * (((
116 168 dB maximum link budget.
117 )))
118 * (((
119 +20 dBm - 100 mW constant RF output vs.
120 )))
121 * (((
122 +14 dBm high efficiency PA.
123 )))
124 * (((
125 Programmable bit rate up to 300 kbps.
126 )))
127 * (((
128 High sensitivity: down to -148 dBm.
129 )))
130 * (((
131 Bullet-proof front end: IIP3 = -12.5 dBm.
132 )))
133 * (((
134 Excellent blocking immunity.
135 )))
136 * (((
137 Low RX current of 10.3 mA, 200 nA register retention.
138 )))
139 * (((
140 Fully integrated synthesizer with a resolution of 61 Hz.
141 )))
142 * (((
143 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
144 )))
145 * (((
146 Built-in bit synchronizer for clock recovery.
147 )))
148 * (((
149 Preamble detection.
150 )))
151 * (((
152 127 dB Dynamic Range RSSI.
153 )))
154 * (((
155 Automatic RF Sense and CAD with ultra-fast AFC.
156 )))
157 * (((
158 Packet engine up to 256 bytes with CRC.
159
160
161 )))
162
163 == 1.3 Features ==
164
165 * LoRaWAN Class A & Class C protocol
166 * Optional Customized LoRa Protocol
167 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
168 * AT Commands to change parameters
169 * Remote configure parameters via LoRa Downlink
170 * Firmware upgradable via program port
171 * Counting
172
173 == 1.4  Applications ==
174
175 * Smart Buildings & Home Automation
176 * Logistics and Supply Chain Management
177 * Smart Metering
178 * Smart Agriculture
179 * Smart Cities
180 * Smart Factory
181
182 == 1.5 Hardware Variants ==
183
184 (% border="1" style="background-color:#f7faff; width:500px" %)
185 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
186 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
187 * 2 x Digital Input (Bi-direction)
188 * 2 x Digital Output
189 * 2 x Relay Output (5A@250VAC / 30VDC)
190 * 2 x 0~~20mA Analog Input (res:0.01mA)
191 * 2 x 0~~30V Analog Input (res:0.01v)
192 * 1 x Counting Port
193 )))
194
195 = 2. Power ON Device =
196
197 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.
198
199 (((
200 PWR will on when device is properly powered.
201 )))
202
203 [[image:1653297104069-180.png]]
204
205
206 = 3. Operation Mode =
207
208 == 3.1 How it works? ==
209
210 (((
211 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. 
212 )))
213
214 (((
215 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.
216
217
218 )))
219
220 == 3.2 Example to join LoRaWAN network ==
221
222 (((
223 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. 
224 )))
225
226 [[image:image-20220523172350-1.png||height="266" width="864"]]
227
228 (((
229 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:
230 )))
231
232 (((
233 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
234 )))
235
236 (((
237 Each LT is shipped with a sticker with the default device EUI as below:
238 )))
239
240 [[image:1653297924498-393.png]]
241
242 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
243
244 Add APP EUI in the application.
245
246 [[image:1653297955910-247.png||height="321" width="716"]]
247
248
249 Add APP KEY and DEV EUI
250
251 [[image:1653298023685-319.png]]
252
253
254 (((
255 **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.
256 )))
257
258 [[image:1653298044601-602.png||height="405" width="709"]]
259
260
261 == 3.3 Uplink Payload ==
262
263 There are five working modes + one interrupt mode on LT for different type application:
264
265 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
266 * **MOD2**: Double DI Counting + DO + RO
267 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
268 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
269 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
270 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
271
272 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
273
274 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
275
276 [[image:image-20220523174024-3.png]]
277
278 (((
279 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
280 )))
281
282 [[image:image-20220523174254-4.png]]
283
284 * RO is for relay. ROx=1 : close，ROx=0 always open.
285 * DI is for digital input. DIx=1: high or float, DIx=0: low.
286 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
287
288 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
289
290 For example if payload is: [[image:image-20220523175847-2.png]]
291
292 **The value for the interface is:  **
293
294 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
295
296 AVI2 channel voltage is 0x04AC/1000=1.196V
297
298 ACI1 channel current is 0x1310/1000=4.880mA
299
300 ACI2 channel current is 0x1300/1000=4.864mA
301
302 The last byte 0xAA= 10101010(B) means
303
304 * [1] RO1 relay channel is close and the RO1 LED is ON.
305 * [0] RO2 relay channel is open and RO2 LED is OFF;
306
307 **LT22222-L:**
308
309 * [1] DI2 channel is high input and DI2 LED is ON;
310 * [0] DI1 channel is low input;
311
312 * [0] DO3 channel output state
313 ** DO3 is float in case no load between DO3 and V+.;
314 ** DO3 is high in case there is load between DO3 and V+.
315 ** DO3 LED is off in both case
316 * [1] DO2 channel output is low and DO2 LED is ON.
317 * [0] DO1 channel output state
318 ** DO1 is float in case no load between DO1 and V+.;
319 ** DO1 is high in case there is load between DO1 and V+.
320 ** DO1 LED is off in both case
321
322 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
323
324 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
325
326 (((
327 Total : 11 bytes payload
328 )))
329
330 [[image:image-20220523180452-3.png]]
331
332 (((
333 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
334 )))
335
336 [[image:image-20220523180506-4.png]]
337
338 * RO is for relay. ROx=1 : close，ROx=0 always open.
339 * FIRST: Indicate this is the first packet after join network.
340 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
341
342 (((
343 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
344 )))
345
346 (((
347 **To use counting mode, please run:**
348 )))
349
350 (% class="box infomessage" %)
351 (((
352 (((
353 **AT+MOD=2**
354 )))
355 )))
356
357 (% class="box infomessage" %)
358 (((
359 (((
360 **ATZ**
361 )))
362 )))
363
364 (((
365 (% style="color:#4f81bd" %)**AT Commands for counting:**
366 )))
367
368 (((
369 **For LT22222-L:**
370 )))
371
372 (% class="box infomessage" %)
373 (((
374 (((
375 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
376 )))
377 )))
378
379 (% class="box infomessage" %)
380 (((
381 (((
382 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
383 )))
384 )))
385
386 (% class="box infomessage" %)
387 (((
388 (((
389 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
390 )))
391 )))
392
393 (% class="box infomessage" %)
394 (((
395 (((
396 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
397 )))
398 )))
399
400 (% class="box infomessage" %)
401 (((
402 (((
403 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
404 )))
405 )))
406
407 (% class="box infomessage" %)
408 (((
409 (((
410 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
411 )))
412 )))
413
414
415 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
416
417 **LT22222-L**: This mode the DI1 is used as a counting pin.
418
419 [[image:image-20220523181246-5.png]]
420
421 (((
422 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
423 )))
424
425 [[image:image-20220523181301-6.png]]
426
427 * RO is for relay. ROx=1 : close，ROx=0 always open.
428 * FIRST: Indicate this is the first packet after join network.
429 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
430
431 (((
432 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
433 )))
434
435 (((
436 **To use counting mode, please run:**
437 )))
438
439 (% class="box infomessage" %)
440 (((
441 (((
442 **AT+MOD=3**
443 )))
444 )))
445
446 (% class="box infomessage" %)
447 (((
448 (((
449 **ATZ**
450 )))
451 )))
452
453 (((
454 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
455
456
457 )))
458
459 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
460
461 **LT22222-L**: This mode the DI1 is used as a counting pin.
462
463 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.
464
465 [[image:image-20220523181903-8.png]]
466
467 (((
468 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
469 )))
470
471 [[image:image-20220523181727-7.png]]
472
473 * RO is for relay. ROx=1 : close，ROx=0 always open.
474 * FIRST: Indicate this is the first packet after join network.
475 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
476
477 (((
478 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
479 )))
480
481 (((
482 **To use this mode, please run:**
483 )))
484
485 (% class="box infomessage" %)
486 (((
487 (((
488 **AT+MOD=4**
489 )))
490 )))
491
492 (% class="box infomessage" %)
493 (((
494 (((
495 **ATZ**
496 )))
497 )))
498
499 (((
500
501 )))
502
503 (((
504 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
505 )))
506
507 (((
508 **Plus below command for AVI1 Counting:**
509 )))
510
511 (% class="box infomessage" %)
512 (((
513 (((
514 **AT+SETCNT=3,60   (set AVI Count to 60)**
515 )))
516 )))
517
518 (% class="box infomessage" %)
519 (((
520 (((
521 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
522 )))
523 )))
524
525 (% class="box infomessage" %)
526 (((
527 (((
528 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
529 )))
530 )))
531
532 (% class="box infomessage" %)
533 (((
534 (((
535 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
536 )))
537 )))
538
539
540 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
541
542 **LT22222-L**: This mode the DI1 is used as a counting pin.
543
544 [[image:image-20220523182334-9.png]]
545
546 (((
547 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
548 )))
549
550 * RO is for relay. ROx=1 : close，ROx=0 always open.
551 * FIRST: Indicate this is the first packet after join network.
552 * (((
553 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
554 )))
555
556 (((
557 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
558 )))
559
560 (((
561 **To use this mode, please run:**
562 )))
563
564 (% class="box infomessage" %)
565 (((
566 (((
567 **AT+MOD=5**
568 )))
569 )))
570
571 (% class="box infomessage" %)
572 (((
573 (((
574 **ATZ**
575 )))
576 )))
577
578 (((
579 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
580
581
582 )))
583
584 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
585
586 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
587
588 For example, if user has configured below commands:
589
590 * **AT+MOD=1 ** **~-~->** The normal working mode
591 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
592
593 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
594
595 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
596 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.**
597
598 **AT Command to set Trigger Condition**:
599
600 (% style="color:#4f81bd" %)**Trigger base on voltage**:
601
602 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
603
604 **Example:**
605
606 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)
607
608 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
609
610
611 (% style="color:#4f81bd" %)**Trigger base on current**:
612
613 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
614
615 **Example:**
616
617 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
618
619
620 (% style="color:#4f81bd" %)**Trigger base on DI status**:
621
622 DI status trigger Flag.
623
624 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
625
626 **Example:**
627
628 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
629
630
631 **Downlink Command to set Trigger Condition**
632
633 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
634
635 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
636
637 AA: Code for this downlink Command:
638
639 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
640
641 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
642
643 yy2 yy2: AC1 or AV1 high limit.
644
645 yy3 yy3: AC2 or AV2 low limit.
646
647 Yy4 yy4: AC2 or AV2 high limit.
648
649 **Example1**: AA 00 13 88 00 00 00 00 00 00
650
651 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
652
653 **Example2**: AA 02 01 00
654
655 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
656
657 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
658
659 MOD6 Payload : total 11 bytes payload
660
661 [[image:image-20220524085923-1.png]]
662
663 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
664
665 [[image:image-20220524090106-2.png]]
666
667 * Each bits shows if the corresponding trigger has been configured.
668
669 **Example:**
670
671 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
672
673
674 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
675
676 [[image:image-20220524090249-3.png]]
677
678 * Each bits shows which status has been trigger on this uplink.
679
680 **Example:**
681
682 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
683
684
685 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
686
687 [[image:image-20220524090456-4.png]]
688
689 * Each bits shows which status has been trigger on this uplink.
690
691 **Example:**
692
693 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
694
695 00000101: Means both DI1 and DI2 trigger are enabled.
696
697
698 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
699
700 Downlink command to poll MOD6 status:
701
702 **AB 06**
703
704 When device got this command, it will send the MOD6 payload.
705
706
707 === 3.3.7 Payload Decoder ===
708
709 (((
710 **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/]]
711
712
713 )))
714
715 == 3.4 ​Configure LT via AT or Downlink ==
716
717 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
718
719 (((
720 There are two kinds of Commands:
721 )))
722
723 * (% 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]]
724
725 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
726
727 === 3.4.1 Common Commands ===
728
729 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]]
730
731
732 === 3.4.2 Sensor related commands ===
733
734 ==== 3.4.2.1 Set Transmit Interval ====
735
736 Set device uplink interval.
737
738 * AT Command:
739
740 (% class="box infomessage" %)
741 (((
742 **AT+TDC=N **
743 )))
744
745 **Example: **AT+TDC=30000. Means set interval to 30 seconds
746
747 * Downlink Payload (prefix 0x01):
748
749 (% class="box infomessage" %)
750 (((
751 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
752 )))
753
754
755 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
756
757 Set work mode.
758
759 * AT Command:
760
761 (% class="box infomessage" %)
762 (((
763 **AT+MOD=N  **
764 )))
765
766 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
767
768 * Downlink Payload (prefix 0x0A):
769
770 (% class="box infomessage" %)
771 (((
772 **0x0A aa     ~/~/ Same as AT+MOD=aa**
773 )))
774
775
776 ==== 3.4.2.3 Poll an uplink ====
777
778 * AT Command:
779
780 There is no AT Command to poll uplink
781
782 * Downlink Payload (prefix 0x08):
783
784 (% class="box infomessage" %)
785 (((
786 **0x08 FF     ~/~/ Poll an uplink,**
787 )))
788
789 **Example**: 0x08FF, ask device to send an Uplink
790
791
792 ==== 3.4.2.4 Enable Trigger Mode ====
793
794 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
795
796 * AT Command:
797
798 (% class="box infomessage" %)
799 (((
800 **AT+ADDMOD6=1 or 0**
801 )))
802
803 1: Enable Trigger Mode
804
805 0: Disable Trigger Mode
806
807 * Downlink Payload (prefix 0x0A 06):
808
809 (% class="box infomessage" %)
810 (((
811 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
812 )))
813
814
815 ==== 3.4.2.5 Poll trigger settings ====
816
817 Poll trigger settings,
818
819 * AT Command:
820
821 There is no AT Command for this feature.
822
823 * Downlink Payload (prefix 0x AB 06):
824
825 (% class="box infomessage" %)
826 (((
827 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
828 )))
829
830
831 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
832
833 Enable Disable DI1/DI2/DI2 as trigger,
834
835 * AT Command:
836
837 (% class="box infomessage" %)
838 (((
839 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
840 )))
841
842 **Example:**
843
844 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
845
846 * Downlink Payload (prefix 0xAA 02):
847
848 (% class="box infomessage" %)
849 (((
850 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
851 )))
852
853
854 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
855
856 Set DI1 or DI3(for LT-33222-L) trigger.
857
858 * AT Command:
859
860 (% class="box infomessage" %)
861 (((
862 **AT+TRIG1=a,b**
863 )))
864
865 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
866
867 b : delay timing.
868
869 **Example:**
870
871 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
872
873 * Downlink Payload (prefix 0x09 01 ):
874
875 (% class="box infomessage" %)
876 (((
877 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
878 )))
879
880
881 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
882
883 Set DI2 trigger.
884
885 * AT Command:
886
887 (% class="box infomessage" %)
888 (((
889 **AT+TRIG2=a,b**
890 )))
891
892 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
893
894 b : delay timing.
895
896 **Example:**
897
898 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
899
900 * Downlink Payload (prefix 0x09 02 ):
901
902 (% class="box infomessage" %)
903 (((
904 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
905 )))
906
907
908 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
909
910 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
911
912 * AT Command:
913
914 (% class="box infomessage" %)
915 (((
916 **AT+ACLIM. **
917 )))
918
919 * Downlink Payload (prefix 0xAA 01 ):
920
921 (% class="box infomessage" %)
922 (((
923 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
924 )))
925
926
927 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
928
929 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
930
931 * AT Command:
932
933 (% class="box infomessage" %)
934 (((
935 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
936 )))
937
938 * Downlink Payload (prefix 0xAA 00 ):
939
940 (% class="box infomessage" %)
941 (((
942 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
943 )))
944
945
946 ==== 3.4.2.11 Trigger – Set minimum interval ====
947
948 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
949
950 * AT Command:
951
952 (% class="box infomessage" %)
953 (((
954 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
955 )))
956
957 * Downlink Payload (prefix 0xAC ):
958
959 (% class="box infomessage" %)
960 (((
961 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
962 )))
963
964
965 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
966
967 * AT Command:
968
969 There is no AT Command to control Digital Output
970
971 * Downlink Payload (prefix 0x02):
972
973 (% class="box infomessage" %)
974 (((
975 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
976 )))
977
978 (((
979 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
980 )))
981
982 (((
983 01: Low,  00: High ,  11: No action
984 )))
985
986 [[image:image-20220524092754-5.png]]
987
988 (((
989 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
990 )))
991
992 (((
993 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
994 )))
995
996
997 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
998
999 * AT Command:
1000
1001 There is no AT Command to control Digital Output
1002
1003 * Downlink Payload (prefix 0xA9):
1004
1005 (% class="box infomessage" %)
1006 (((
1007 (((
1008 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1009 )))
1010 )))
1011
1012 This is to control the digital output time of DO pin. Include four bytes:
1013
1014 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1015
1016 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1017
1018 01: DO pins will change back to original state after timeout.
1019
1020 00: DO pins will change to an inverter state after timeout 
1021
1022 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1023
1024 [[image:image-20220524093238-6.png]]
1025
1026 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1027
1028 [[image:image-20220524093328-7.png]]
1029
1030 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1031
1032 [[image:image-20220524093351-8.png]]
1033
1034 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1035
1036 Latching time. Unit: ms
1037
1038 Device will upload a packet if downlink code executes successfully.
1039
1040 **Example payload:**
1041
1042 **~1. A9 01 01 01 01 07 D0**
1043
1044 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1045
1046 **2. A9 01 00 01 11 07 D0**
1047
1048 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1049
1050 **3. A9 00 00 00 00 07 D0**
1051
1052 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1053
1054 **4. A9 00 11 01 00 07 D0**
1055
1056 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
1057
1058
1059 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1060
1061 * AT Command:
1062
1063 There is no AT Command to control Relay Output
1064
1065 * Downlink Payload (prefix 0x03):
1066
1067 (% class="box infomessage" %)
1068 (((
1069 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1070 )))
1071
1072 (((
1073 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1074 )))
1075
1076 (((
1077 01: Close ,  00: Open , 11: No action
1078 )))
1079
1080 (((
1081 [[image:image-20220524093724-9.png]]
1082 )))
1083
1084 Device will upload a packet if downlink code executes successfully.
1085
1086
1087 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1088
1089 * AT Command:
1090
1091 There is no AT Command to control Relay Output
1092
1093 * Downlink Payload (prefix 0x05):
1094
1095 (% class="box infomessage" %)
1096 (((
1097 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1098 )))
1099
1100 This is to control the relay output time of relay. Include four bytes:
1101
1102 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1103
1104 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1105
1106 01: Relays will change back to original state after timeout.
1107
1108 00: Relays will change to an inverter state after timeout
1109
1110 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1111
1112 [[image:image-20220524093831-10.png]]
1113
1114 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1115
1116 Device will upload a packet if downlink code executes successfully.
1117
1118 **Example payload:**
1119
1120 **~1. 05 01 11 07 D0**
1121
1122 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1123
1124 **2. 05 01 10 07 D0**
1125
1126 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1127
1128 **3. 05 00 01 07 D0**
1129
1130 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1131
1132 **4. 05 00 00 07 D0**
1133
1134 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1135
1136
1137 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1138
1139 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1140
1141 * AT Command:
1142
1143 (% class="box infomessage" %)
1144 (((
1145 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1146 )))
1147
1148 * Downlink Payload (prefix 0xA5):
1149
1150 (% class="box infomessage" %)
1151 (((
1152 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1153 )))
1154
1155
1156 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1157
1158 * AT Command:
1159
1160 (% class="box infomessage" %)
1161 (((
1162 **AT+SETCNT=aa,(bb cc dd ee) **
1163 )))
1164
1165 aa: 1: Set count1,
1166
1167 2: Set count2,
1168
1169 3: Set AV1 count
1170
1171 Bb cc dd ee: number to be set
1172
1173 * Downlink Payload (prefix 0xA8):
1174
1175 (% class="box infomessage" %)
1176 (((
1177 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1178 )))
1179
1180
1181 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1182
1183 Clear counting for counting mode
1184
1185 * AT Command:
1186
1187 (% class="box infomessage" %)
1188 (((
1189 **AT+CLRCOUNT ~/~/ clear all counting**
1190 )))
1191
1192 * Downlink Payload (prefix 0xA6):
1193
1194 (% class="box infomessage" %)
1195 (((
1196 **0x A6 01     ~/~/ clear all counting,**
1197 )))
1198
1199
1200 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1201
1202 * AT Command:
1203
1204 (% class="box infomessage" %)
1205 (((
1206 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1207 )))
1208
1209 * Downlink Payload (prefix 0xA7):
1210
1211 (% class="box infomessage" %)
1212 (((
1213 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1214 )))
1215
1216 (((
1217 range: aa bb cc:0 to 16777215,  (unit:second)
1218
1219
1220 )))
1221
1222 == 3.5 Integrate with Mydevice ==
1223
1224 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:
1225
1226 (((
1227 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1228 )))
1229
1230 (((
1231 **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:
1232 )))
1233
1234 [[image:1653356737703-362.png||height="232" width="732"]]
1235
1236 [[image:image-20220524094641-11.png||height="390" width="723"]]
1237
1238 [[image:image-20220524094641-12.png||height="402" width="718"]]
1239
1240
1241 **Step 3**: Create an account or log in Mydevices.
1242
1243 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1244
1245 Search under The things network
1246
1247 [[image:1653356838789-523.png||height="337" width="740"]]
1248
1249
1250 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1251
1252 [[image:image-20220524094909-1.png||height="335" width="729"]]
1253
1254 [[image:image-20220524094909-2.png||height="337" width="729"]]
1255
1256 [[image:image-20220524094909-3.png||height="338" width="727"]]
1257
1258 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1259
1260 [[image:image-20220524094909-5.png||height="341" width="734"]]
1261
1262
1263 == 3.6 Interface Detail ==
1264
1265 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1266
1267 Support NPN Type sensor
1268
1269 [[image:1653356991268-289.png]]
1270
1271
1272 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1273
1274 (((
1275 The DI port of LT-22222-L can support NPN or PNP output sensor.
1276 )))
1277
1278 (((
1279 (((
1280 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
1281 )))
1282 )))
1283
1284 [[image:1653357170703-587.png]]
1285
1286 (((
1287 (((
1288 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1289 )))
1290 )))
1291
1292 (((
1293
1294 )))
1295
1296 (((
1297 **Example1**: Connect to a Low active sensor.
1298 )))
1299
1300 (((
1301 This type of sensor will output a low signal GND when active.
1302 )))
1303
1304 * (((
1305 Connect sensor’s output to DI1-
1306 )))
1307 * (((
1308 Connect sensor’s VCC to DI1+.
1309 )))
1310
1311 (((
1312 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1313 )))
1314
1315 (((
1316 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1317 )))
1318
1319 (((
1320 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.
1321 )))
1322
1323 (((
1324
1325 )))
1326
1327 (((
1328 **Example2**: Connect to a High active sensor.
1329 )))
1330
1331 (((
1332 This type of sensor will output a high signal (example 24v) when active.
1333 )))
1334
1335 * (((
1336 Connect sensor’s output to DI1+
1337 )))
1338 * (((
1339 Connect sensor’s GND DI1-.
1340 )))
1341
1342 (((
1343 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1344 )))
1345
1346 (((
1347 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1348 )))
1349
1350 (((
1351 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.
1352 )))
1353
1354 (((
1355
1356 )))
1357
1358 (((
1359 **Example3**: Connect to a 220v high active sensor.
1360 )))
1361
1362 (((
1363 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1364 )))
1365
1366 * (((
1367 Connect sensor’s output to DI1+ with a serial 50K resistor
1368 )))
1369 * (((
1370 Connect sensor’s GND DI1-.
1371 )))
1372
1373 (((
1374 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1375 )))
1376
1377 (((
1378 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1379 )))
1380
1381 (((
1382 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.
1383 )))
1384
1385
1386 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1387
1388 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1389
1390 [[image:1653357531600-905.png]]
1391
1392
1393 === 3.6.4 Analog Input Interface ===
1394
1395 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:
1396
1397 **AC2 = (IN2 voltage )/12**
1398
1399 [[image:1653357592296-182.png]]
1400
1401 Example to connect a 4~~20mA sensor
1402
1403 We take the wind speed sensor as an example for reference only.
1404
1405 Specifications of the wind speed sensor:
1406
1407 Red:12~~24v
1408
1409 Yellow:4~~20mA
1410
1411 Black:GND
1412
1413
1414 Connection diagram:
1415
1416 [[image:1653357640609-758.png]]
1417
1418 [[image:1653357648330-671.png||height="155" width="733"]]
1419
1420
1421 === 3.6.5 Relay Output ===
1422
1423 (((
1424 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:
1425 )))
1426
1427 [[image:image-20220524100215-9.png]]
1428
1429 [[image:image-20220524100215-10.png||height="382" width="723"]]
1430
1431
1432 == 3.7 LEDs Indicators ==
1433
1434 [[image:image-20220524100748-11.png]]
1435
1436
1437 = 4. Use AT Command =
1438
1439 == 4.1 Access AT Command ==
1440
1441 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.
1442
1443 [[image:1653358238933-385.png]]
1444
1445 (((
1446 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:
1447 )))
1448
1449 [[image:1653358355238-883.png]]
1450
1451 (((
1452 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/]]
1453 )))
1454
1455 (((
1456 AT+<CMD>?        : Help on <CMD>
1457 )))
1458
1459 (((
1460 AT+<CMD>         : Run <CMD>
1461 )))
1462
1463 (((
1464 AT+<CMD>=<value> : Set the value
1465 )))
1466
1467 (((
1468 AT+<CMD>=?       : Get the value
1469 )))
1470
1471 (((
1472 ATZ: Trig a reset of the MCU
1473 )))
1474
1475 (((
1476 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1477 )))
1478
1479 (((
1480 AT+DEUI: Get or Set the Device EUI
1481 )))
1482
1483 (((
1484 AT+DADDR: Get or Set the Device Address
1485 )))
1486
1487 (((
1488 AT+APPKEY: Get or Set the Application Key
1489 )))
1490
1491 (((
1492 AT+NWKSKEY: Get or Set the Network Session Key
1493 )))
1494
1495 (((
1496 AT+APPSKEY: Get or Set the Application Session Key
1497 )))
1498
1499 (((
1500 AT+APPEUI: Get or Set the Application EUI
1501 )))
1502
1503 (((
1504 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1505 )))
1506
1507 (((
1508 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1509 )))
1510
1511 (((
1512 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1513 )))
1514
1515 (((
1516 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1517 )))
1518
1519 (((
1520 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1521 )))
1522
1523 (((
1524 AT+RX2FQ: Get or Set the Rx2 window frequency
1525 )))
1526
1527 (((
1528 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1529 )))
1530
1531 (((
1532 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1533 )))
1534
1535 (((
1536 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1537 )))
1538
1539 (((
1540 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1541 )))
1542
1543 (((
1544 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1545 )))
1546
1547 (((
1548 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1549 )))
1550
1551 (((
1552 AT+NWKID: Get or Set the Network ID
1553 )))
1554
1555 (((
1556 AT+FCU: Get or Set the Frame Counter Uplink
1557 )))
1558
1559 (((
1560 AT+FCD: Get or Set the Frame Counter Downlink
1561 )))
1562
1563 (((
1564 AT+CLASS: Get or Set the Device Class
1565 )))
1566
1567 (((
1568 AT+JOIN: Join network
1569 )))
1570
1571 (((
1572 AT+NJS: Get OTAA Join Status
1573 )))
1574
1575 (((
1576 AT+SENDB: Send hexadecimal data along with the application port
1577 )))
1578
1579 (((
1580 AT+SEND: Send text data along with the application port
1581 )))
1582
1583 (((
1584 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1585 )))
1586
1587 (((
1588 AT+RECV: Print last received data in raw format
1589 )))
1590
1591 (((
1592 AT+VER: Get current image version and Frequency Band
1593 )))
1594
1595 (((
1596 AT+CFM: Get or Set the confirmation mode (0-1)
1597 )))
1598
1599 (((
1600 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1601 )))
1602
1603 (((
1604 AT+SNR: Get the SNR of the last received packet
1605 )))
1606
1607 (((
1608 AT+RSSI: Get the RSSI of the last received packet
1609 )))
1610
1611 (((
1612 AT+TDC: Get or set the application data transmission interval in ms
1613 )))
1614
1615 (((
1616 AT+PORT: Get or set the application port
1617 )))
1618
1619 (((
1620 AT+DISAT: Disable AT commands
1621 )))
1622
1623 (((
1624 AT+PWORD: Set password, max 9 digits
1625 )))
1626
1627 (((
1628 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1629 )))
1630
1631 (((
1632 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1633 )))
1634
1635 (((
1636 AT+CFG: Print all settings
1637
1638
1639 )))
1640
1641 == 4.2 Common AT Command Sequence ==
1642
1643 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1644
1645 (((
1646 If device has not joined network yet:
1647 )))
1648
1649 (((
1650 (% style="background-color:#dcdcdc" %)123456
1651 )))
1652
1653 (((
1654 (% style="background-color:#dcdcdc" %)AT+FDR
1655 )))
1656
1657 (((
1658 (% style="background-color:#dcdcdc" %)123456
1659 )))
1660
1661 (((
1662 (% style="background-color:#dcdcdc" %)AT+NJM=0
1663 )))
1664
1665 (((
1666 (% style="background-color:#dcdcdc" %)ATZ
1667 )))
1668
1669
1670 (((
1671 If device already joined network:
1672 )))
1673
1674 (((
1675 (% style="background-color:#dcdcdc" %)AT+NJM=0
1676 )))
1677
1678 (((
1679 (% style="background-color:#dcdcdc" %)ATZ
1680
1681
1682 )))
1683
1684 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1685
1686 (((
1687 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1688 )))
1689
1690 (((
1691 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1692 )))
1693
1694 (((
1695 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1696 )))
1697
1698 (((
1699 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1700 )))
1701
1702 (((
1703 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1704 )))
1705
1706 (((
1707 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1708 )))
1709
1710 (((
1711 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1712 )))
1713
1714 (((
1715 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1716 )))
1717
1718 (((
1719 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1720 )))
1721
1722 (((
1723 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1724 )))
1725
1726 (((
1727 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1728 )))
1729
1730 (((
1731 (% 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.
1732 )))
1733
1734 (((
1735 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1736 )))
1737
1738 (((
1739 (% style="color:red" %)**Note:**
1740 )))
1741
1742 (((
1743 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1744 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1745 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.
1746 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
1747 )))
1748
1749 (((
1750 [[image:1653359097980-169.png||height="188" width="729"]]
1751 )))
1752
1753 (((
1754
1755 )))
1756
1757 === 4.2.3 Change to Class A ===
1758
1759 If sensor JOINED
1760 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1761 ATZ
1762
1763
1764 = 5. FAQ =
1765
1766 == 5.1 How to upgrade the image? ==
1767
1768 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1769
1770 * Support new features
1771 * For bug fix
1772 * Change LoRaWAN bands.
1773 Below shows the hardware connection for how to upload an image to the LT:
1774 * [[image:1653359603330-121.png]]
1775
1776 (((
1777 **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]].
1778 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1779 **Step3: **Open flashloader; choose the correct COM port to update.
1780 **For LT-22222-L**:
1781 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.
1782 )))
1783
1784 [[image:image-20220524103407-12.png]]
1785
1786 [[image:image-20220524103429-13.png]]
1787
1788 [[image:image-20220524104033-15.png]]
1789
1790 (% 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:
1791
1792 [[image:1653360054704-518.png||height="186" width="745"]]
1793
1794
1795 (((
1796 (((
1797 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1798 )))
1799 )))
1800
1801 (((
1802 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1803
1804
1805 )))
1806
1807 (((
1808 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1809 )))
1810
1811 (((
1812 (((
1813 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1814 )))
1815 )))
1816
1817 (((
1818 (((
1819 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1820 )))
1821 )))
1822
1823 (((
1824 (% 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.
1825 )))
1826
1827 (((
1828 [[image:1653360231087-571.png||height="401" width="727"]]
1829 )))
1830
1831 (((
1832 (% 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.
1833 )))
1834
1835 (((
1836 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1837 )))
1838
1839 (((
1840 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1841 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1842 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1843 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1844 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1845 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1846 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1847 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1848 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1849 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1850 )))
1851
1852 (((
1853 As shown in below:
1854 )))
1855
1856 [[image:1653360498588-932.png||height="485" width="726"]]
1857
1858
1859 == 5.4 Can I see counting event in Serial? ==
1860
1861 (((
1862 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.
1863
1864
1865 == 5.5 Can i use point to point communication for LT-22222-L? ==
1866
1867 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1868
1869
1870 )))
1871
1872 (((
1873 = 6. Trouble Shooting =
1874 )))
1875
1876 (((
1877 (((
1878 == 6.1 Downlink doesn’t work, how to solve it? ==
1879 )))
1880 )))
1881
1882 (((
1883 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1884
1885
1886 )))
1887
1888 (((
1889 == 6.2 Have trouble to upload image. ==
1890 )))
1891
1892 (((
1893 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1894 )))
1895
1896 (((
1897
1898 )))
1899
1900 (((
1901 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1902 )))
1903
1904 (((
1905 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1906 )))
1907
1908 (((
1909
1910 )))
1911
1912 (((
1913 = 7. Order Info =
1914 )))
1915
1916 (((
1917 (((
1918 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1919 )))
1920 )))
1921
1922 (((
1923 (((
1924 (% style="color:#4f81bd" %)**XXX:**
1925 )))
1926 )))
1927
1928 (((
1929 * (((
1930 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1931 )))
1932 )))
1933
1934 (((
1935 * (((
1936 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1937 )))
1938 )))
1939
1940 (((
1941 * (((
1942 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1943 )))
1944 )))
1945
1946 (((
1947 * (((
1948 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1949 )))
1950 )))
1951
1952 (((
1953 * (((
1954 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1955 )))
1956 )))
1957
1958 (((
1959 * (((
1960 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1961 )))
1962 )))
1963
1964 (((
1965 * (((
1966 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1967 )))
1968 )))
1969
1970 (((
1971 * (((
1972 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1973 )))
1974 )))
1975
1976 (((
1977 * (((
1978 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1979
1980
1981 )))
1982
1983 = 8. Packing Info =
1984 )))
1985
1986 (((
1987 (((
1988 **Package Includes**:
1989 )))
1990 )))
1991
1992 (((
1993 (((
1994 * LT-22222-L I/O Controller x 1
1995 * Stick Antenna for LoRa RF part x 1
1996 * Bracket for controller x1
1997 * Program cable x 1
1998 )))
1999 )))
2000
2001 (((
2002 (((
2003 **Dimension and weight**:
2004 )))
2005 )))
2006
2007 (((
2008 (((
2009 * Device Size: 13.5 x 7 x 3 cm
2010 * Device Weight: 105g
2011 * Package Size / pcs : 14.5 x 8 x 5 cm
2012 * Weight / pcs : 170g
2013
2014
2015 )))
2016 )))
2017
2018 (((
2019 = 9. Support =
2020 )))
2021
2022 * (((
2023 (((
2024 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.
2025 )))
2026 )))
2027 * (((
2028 (((
2029 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
2030 )))
2031 )))
2032
2033 (((
2034 (((
2035 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2036
2037
2038 )))
2039
2040 (((
2041 = 10. Reference​​​​​ =
2042
2043 * Product Page:
2044
2045 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]]
2046
2047 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2048 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2049 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2050 )))
2051 )))