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Version 68.19 by Xiaoling on 2022/05/25 15:28
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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 = 1.Introduction =
15
16 == 1.1 What is LT Series I/O Controller ==
17
18 (((
19 The Dragino LT series I/O Modules are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as: analog current Input, analog voltage input, relay output, digital input and digital output etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
20 )))
21
22 (((
23 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.
24 )))
25
26 (((
27 The LT I/O Controllers is aiming to provide a simple plug and play, low cost installation by using LoRaWAN wireless technology.
28 )))
29
30 (((
31 The use environment includes:
32 )))
33
34 (((
35 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.
36 )))
37
38 (((
39 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
40 )))
41
42 (((
43 [[image:1653295757274-912.png]]
44
45
46 )))
47
48 == 1.2  Specifications ==
49
50 (((
51 **Hardware System:**
52 )))
53
54 * (((
55 STM32L072CZT6 MCU
56 )))
57 * (((
58 SX1276/78 Wireless Chip 
59 )))
60 * (((
61 (((
62 Power Consumption:
63 )))
64
65 * (((
66 Idle: 4mA@12v
67 )))
68 * (((
69 20dB Transmit: 34mA@12v
70 )))
71 )))
72
73 (((
74 **Interface for Model: LT22222-L:**
75 )))
76
77 * (((
78 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
79 )))
80 * (((
81 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
82 )))
83 * (((
84 2 x Relay Output (5A@250VAC / 30VDC)
85 )))
86 * (((
87 2 x 0~~20mA Analog Input (res:0.01mA)
88 )))
89 * (((
90 2 x 0~~30V Analog Input (res:0.01v)
91 )))
92 * (((
93 Power Input 7~~ 24V DC. 
94 )))
95
96 (((
97 **LoRa Spec:**
98 )))
99
100 * (((
101 (((
102 Frequency Range:
103 )))
104
105 * (((
106 Band 1 (HF): 862 ~~ 1020 Mhz
107 )))
108 * (((
109 Band 2 (LF): 410 ~~ 528 Mhz
110 )))
111 )))
112 * (((
113 168 dB maximum link budget.
114 )))
115 * (((
116 +20 dBm - 100 mW constant RF output vs.
117 )))
118 * (((
119 +14 dBm high efficiency PA.
120 )))
121 * (((
122 Programmable bit rate up to 300 kbps.
123 )))
124 * (((
125 High sensitivity: down to -148 dBm.
126 )))
127 * (((
128 Bullet-proof front end: IIP3 = -12.5 dBm.
129 )))
130 * (((
131 Excellent blocking immunity.
132 )))
133 * (((
134 Low RX current of 10.3 mA, 200 nA register retention.
135 )))
136 * (((
137 Fully integrated synthesizer with a resolution of 61 Hz.
138 )))
139 * (((
140 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
141 )))
142 * (((
143 Built-in bit synchronizer for clock recovery.
144 )))
145 * (((
146 Preamble detection.
147 )))
148 * (((
149 127 dB Dynamic Range RSSI.
150 )))
151 * (((
152 Automatic RF Sense and CAD with ultra-fast AFC.
153 )))
154 * (((
155 Packet engine up to 256 bytes with CRC.
156
157
158 )))
159
160 == 1.3 Features ==
161
162 * LoRaWAN Class A & Class C protocol
163 * Optional Customized LoRa Protocol
164 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
165 * AT Commands to change parameters
166 * Remote configure parameters via LoRa Downlink
167 * Firmware upgradable via program port
168 * Counting
169
170
171 == 1.4  Applications ==
172
173 * Smart Buildings & Home Automation
174 * Logistics and Supply Chain Management
175 * Smart Metering
176 * Smart Agriculture
177 * Smart Cities
178 * Smart Factory
179
180
181 == 1.5 Hardware Variants ==
182
183 (% border="1" style="background-color:#f7faff; width:500px" %)
184 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
185 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
186 * 2 x Digital Input (Bi-direction)
187 * 2 x Digital Output
188 * 2 x Relay Output (5A@250VAC / 30VDC)
189 * 2 x 0~~20mA Analog Input (res:0.01mA)
190 * 2 x 0~~30V Analog Input (res:0.01v)
191 * 1 x Counting Port
192 )))
193
194
195
196 = 2. Power ON Device =
197
198 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.
199
200 (((
201 PWR will on when device is properly powered.
202 )))
203
204 [[image:1653297104069-180.png]]
205
206
207 = 3. Operation Mode =
208
209 == 3.1 How it works? ==
210
211 (((
212 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. 
213 )))
214
215 (((
216 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.
217
218
219 )))
220
221 == 3.2 Example to join LoRaWAN network ==
222
223 (((
224 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. 
225 )))
226
227 [[image:image-20220523172350-1.png||height="266" width="864"]]
228
229 (((
230 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:
231 )))
232
233 (((
234 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
235 )))
236
237 (((
238 Each LT is shipped with a sticker with the default device EUI as below:
239 )))
240
241 [[image:1653297924498-393.png]]
242
243 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
244
245 Add APP EUI in the application.
246
247 [[image:1653297955910-247.png||height="321" width="716"]]
248
249
250 Add APP KEY and DEV EUI
251
252 [[image:1653298023685-319.png]]
253
254
255 (((
256 **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.
257 )))
258
259 [[image:1653298044601-602.png||height="405" width="709"]]
260
261
262 == 3.3 Uplink Payload ==
263
264 There are five working modes + one interrupt mode on LT for different type application:
265
266 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
267 * **MOD2**: Double DI Counting + DO + RO
268 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
269 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
270 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
271 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
272
273
274 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
275
276 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
277
278 [[image:image-20220523174024-3.png]]
279
280 (((
281 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
282 )))
283
284 [[image:image-20220523174254-4.png]]
285
286 * RO is for relay. ROx=1 : close，ROx=0 always open.
287 * DI is for digital input. DIx=1: high or float, DIx=0: low.
288 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
289
290 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
291
292 For example if payload is: [[image:image-20220523175847-2.png]]
293
294 **The value for the interface is:  **
295
296 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
297
298 AVI2 channel voltage is 0x04AC/1000=1.196V
299
300 ACI1 channel current is 0x1310/1000=4.880mA
301
302 ACI2 channel current is 0x1300/1000=4.864mA
303
304 The last byte 0xAA= 10101010(B) means
305
306 * [1] RO1 relay channel is close and the RO1 LED is ON.
307 * [0] RO2 relay channel is open and RO2 LED is OFF;
308
309
310 **LT22222-L:**
311
312 * [1] DI2 channel is high input and DI2 LED is ON;
313 * [0] DI1 channel is low input;
314
315 * [0] DO3 channel output state
316 ** DO3 is float in case no load between DO3 and V+.;
317 ** DO3 is high in case there is load between DO3 and V+.
318 ** DO3 LED is off in both case
319 * [1] DO2 channel output is low and DO2 LED is ON.
320 * [0] DO1 channel output state
321 ** DO1 is float in case no load between DO1 and V+.;
322 ** DO1 is high in case there is load between DO1 and V+.
323 ** DO1 LED is off in both case
324
325
326 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
327
328 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
329
330 (((
331 Total : 11 bytes payload
332 )))
333
334 [[image:image-20220523180452-3.png]]
335
336 (((
337 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
338 )))
339
340 [[image:image-20220523180506-4.png]]
341
342 * RO is for relay. ROx=1 : close，ROx=0 always open.
343 * FIRST: Indicate this is the first packet after join network.
344 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
345
346 (((
347 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
348 )))
349
350 (((
351 **To use counting mode, please run:**
352 )))
353
354 (% class="box infomessage" %)
355 (((
356 (((
357 **AT+MOD=2**
358 )))
359 )))
360
361 (% class="box infomessage" %)
362 (((
363 (((
364 **ATZ**
365 )))
366 )))
367
368 (((
369 (% style="color:#4f81bd" %)**AT Commands for counting:**
370 )))
371
372 (((
373 **For LT22222-L:**
374 )))
375
376 (% class="box infomessage" %)
377 (((
378 (((
379 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
380 )))
381 )))
382
383 (% class="box infomessage" %)
384 (((
385 (((
386 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
387 )))
388 )))
389
390 (% class="box infomessage" %)
391 (((
392 (((
393 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
394 )))
395 )))
396
397 (% class="box infomessage" %)
398 (((
399 (((
400 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
401 )))
402 )))
403
404 (% class="box infomessage" %)
405 (((
406 (((
407 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
408 )))
409 )))
410
411 (% class="box infomessage" %)
412 (((
413 (((
414 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
415 )))
416 )))
417
418
419 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
420
421 **LT22222-L**: This mode the DI1 is used as a counting pin.
422
423 [[image:image-20220523181246-5.png]]
424
425 (((
426 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
427 )))
428
429 [[image:image-20220523181301-6.png]]
430
431 * RO is for relay. ROx=1 : close，ROx=0 always open.
432 * FIRST: Indicate this is the first packet after join network.
433 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
434
435 (((
436 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
437 )))
438
439 (((
440 **To use counting mode, please run:**
441 )))
442
443 (% class="box infomessage" %)
444 (((
445 (((
446 **AT+MOD=3**
447 )))
448 )))
449
450 (% class="box infomessage" %)
451 (((
452 (((
453 **ATZ**
454 )))
455 )))
456
457 (((
458 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
459
460
461 )))
462
463 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
464
465 **LT22222-L**: This mode the DI1 is used as a counting pin.
466
467 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.
468
469 [[image:image-20220523181903-8.png]]
470
471 (((
472 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
473 )))
474
475 [[image:image-20220523181727-7.png]]
476
477 * RO is for relay. ROx=1 : close，ROx=0 always open.
478 * FIRST: Indicate this is the first packet after join network.
479 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
480
481 (((
482 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
483 )))
484
485 (((
486 **To use this mode, please run:**
487 )))
488
489 (% class="box infomessage" %)
490 (((
491 (((
492 **AT+MOD=4**
493 )))
494 )))
495
496 (% class="box infomessage" %)
497 (((
498 (((
499 **ATZ**
500 )))
501 )))
502
503 (((
504
505 )))
506
507 (((
508 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
509 )))
510
511 (((
512 **Plus below command for AVI1 Counting:**
513 )))
514
515 (% class="box infomessage" %)
516 (((
517 (((
518 **AT+SETCNT=3,60   (set AVI Count to 60)**
519 )))
520 )))
521
522 (% class="box infomessage" %)
523 (((
524 (((
525 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
526 )))
527 )))
528
529 (% class="box infomessage" %)
530 (((
531 (((
532 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
533 )))
534 )))
535
536 (% class="box infomessage" %)
537 (((
538 (((
539 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
540 )))
541 )))
542
543
544 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
545
546 **LT22222-L**: This mode the DI1 is used as a counting pin.
547
548 [[image:image-20220523182334-9.png]]
549
550 (((
551 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
552 )))
553
554 * RO is for relay. ROx=1 : close，ROx=0 always open.
555 * FIRST: Indicate this is the first packet after join network.
556 * (((
557 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
558 )))
559
560 (((
561 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
562 )))
563
564 (((
565 **To use this mode, please run:**
566 )))
567
568 (% class="box infomessage" %)
569 (((
570 (((
571 **AT+MOD=5**
572 )))
573 )))
574
575 (% class="box infomessage" %)
576 (((
577 (((
578 **ATZ**
579 )))
580 )))
581
582 (((
583 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
584
585
586 )))
587
588 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
589
590 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
591
592 For example, if user has configured below commands:
593
594 * **AT+MOD=1 ** **~-~->** The normal working mode
595 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
596
597 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
598
599 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
600 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.**
601
602 **AT Command to set Trigger Condition**:
603
604 (% style="color:#4f81bd" %)**Trigger base on voltage**:
605
606 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
607
608 **Example:**
609
610 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)
611
612 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
613
614 (% style="color:#4f81bd" %)**Trigger base on current**:
615
616 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
617
618 **Example:**
619
620 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
621
622 (% style="color:#4f81bd" %)**Trigger base on DI status**:
623
624 DI status trigger Flag.
625
626 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
627
628 **Example:**
629
630 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
631
632
633 **Downlink Command to set Trigger Condition**
634
635 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
636
637 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
638
639 AA: Code for this downlink Command:
640
641 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
642
643 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
644
645 yy2 yy2: AC1 or AV1 high limit.
646
647 yy3 yy3: AC2 or AV2 low limit.
648
649 Yy4 yy4: AC2 or AV2 high limit.
650
651 **Example1**: AA 00 13 88 00 00 00 00 00 00
652
653 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
654
655 **Example2**: AA 02 01 00
656
657 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
658
659 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
660
661 MOD6 Payload : total 11 bytes payload
662
663 [[image:image-20220524085923-1.png]]
664
665 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
666
667 [[image:image-20220524090106-2.png]]
668
669 * Each bits shows if the corresponding trigger has been configured.
670
671 **Example:**
672
673 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
674
675
676 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
677
678 [[image:image-20220524090249-3.png]]
679
680 * Each bits shows which status has been trigger on this uplink.
681
682 **Example:**
683
684 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
685
686
687 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
688
689 [[image:image-20220524090456-4.png]]
690
691 * Each bits shows which status has been trigger on this uplink.
692
693 **Example:**
694
695 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
696
697 00000101: Means both DI1 and DI2 trigger are enabled.
698
699
700 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
701
702 Downlink command to poll MOD6 status:
703
704 **AB 06**
705
706 When device got this command, it will send the MOD6 payload.
707
708
709 === 3.3.7 Payload Decoder ===
710
711 (((
712 **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/]]
713
714
715 )))
716
717 == 3.4 ​Configure LT via AT or Downlink ==
718
719 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
720
721 (((
722 There are two kinds of Commands:
723 )))
724
725 * (% 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: http:~/~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands
726
727 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
728
729
730 === 3.4.1 Common Commands ===
731
732 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]]
733
734
735 === 3.4.2 Sensor related commands ===
736
737 ==== 3.4.2.1 Set Transmit Interval ====
738
739 Set device uplink interval.
740
741 * AT Command:
742
743 (% class="box infomessage" %)
744 (((
745 **AT+TDC=N **
746 )))
747
748 **Example: **AT+TDC=30000. Means set interval to 30 seconds
749
750 * Downlink Payload (prefix 0x01):
751
752 (% class="box infomessage" %)
753 (((
754 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
755 )))
756
757
758 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
759
760 Set work mode.
761
762 * AT Command:
763
764 (% class="box infomessage" %)
765 (((
766 **AT+MOD=N  **
767 )))
768
769 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
770
771 * Downlink Payload (prefix 0x0A):
772
773 (% class="box infomessage" %)
774 (((
775 **0x0A aa     ~/~/ Same as AT+MOD=aa**
776 )))
777
778
779 ==== 3.4.2.3 Poll an uplink ====
780
781 * AT Command:
782
783 There is no AT Command to poll uplink
784
785 * Downlink Payload (prefix 0x08):
786
787 (% class="box infomessage" %)
788 (((
789 **0x08 FF     ~/~/ Poll an uplink,**
790 )))
791
792 **Example**: 0x08FF, ask device to send an Uplink
793
794
795 ==== 3.4.2.4 Enable Trigger Mode ====
796
797 Use of trigger mode, please check [[ADDMOD6>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
798
799 * AT Command:
800
801 (% class="box infomessage" %)
802 (((
803 **AT+ADDMOD6=1 or 0**
804 )))
805
806 1: Enable Trigger Mode
807
808 0: Disable Trigger Mode
809
810 * Downlink Payload (prefix 0x0A 06):
811
812 (% class="box infomessage" %)
813 (((
814 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
815 )))
816
817
818 ==== 3.4.2.5 Poll trigger settings ====
819
820 Poll trigger settings,
821
822 * AT Command:
823
824 There is no AT Command for this feature.
825
826 * Downlink Payload (prefix 0x AB 06):
827
828 (% class="box infomessage" %)
829 (((
830 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
831 )))
832
833
834 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
835
836 Enable Disable DI1/DI2/DI2 as trigger,
837
838 * AT Command:
839
840 (% class="box infomessage" %)
841 (((
842 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
843 )))
844
845 **Example:**
846
847 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
848
849 * Downlink Payload (prefix 0xAA 02):
850
851 (% class="box infomessage" %)
852 (((
853 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
854 )))
855
856
857 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
858
859 Set DI1 or DI3(for LT-33222-L) trigger.
860
861 * AT Command:
862
863 (% class="box infomessage" %)
864 (((
865 **AT+TRIG1=a,b**
866 )))
867
868 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
869
870 b : delay timing.
871
872 **Example:**
873
874 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
875
876 * Downlink Payload (prefix 0x09 01 ):
877
878 (% class="box infomessage" %)
879 (((
880 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
881 )))
882
883
884 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
885
886 Set DI2 trigger.
887
888 * AT Command:
889
890 (% class="box infomessage" %)
891 (((
892 **AT+TRIG2=a,b**
893 )))
894
895 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
896
897 b : delay timing.
898
899 **Example:**
900
901 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
902
903 * Downlink Payload (prefix 0x09 02 ):
904
905 (% class="box infomessage" %)
906 (((
907 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
908 )))
909
910
911 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
912
913 Set current trigger , base on AC port. See [[trigger mode>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
914
915 * AT Command:
916
917 (% class="box infomessage" %)
918 (((
919 **AT+ACLIM. **
920 )))
921
922 * Downlink Payload (prefix 0xAA 01 ):
923
924 (% class="box infomessage" %)
925 (((
926 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]**
927 )))
928
929
930 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
931
932 Set current trigger , base on AV port. See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
933
934 * AT Command:
935
936 (% class="box infomessage" %)
937 (((
938 **AT+AVLIM. See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]**
939 )))
940
941 * Downlink Payload (prefix 0xAA 00 ):
942
943 (% class="box infomessage" %)
944 (((
945 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]] **
946 )))
947
948
949 ==== 3.4.2.11 Trigger – Set minimum interval ====
950
951 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
952
953 * AT Command:
954
955 (% class="box infomessage" %)
956 (((
957 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
958 )))
959
960 * Downlink Payload (prefix 0xAC ):
961
962 (% class="box infomessage" %)
963 (((
964 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
965 )))
966
967
968 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
969
970 * AT Command:
971
972 There is no AT Command to control Digital Output
973
974 * Downlink Payload (prefix 0x02):
975
976 (% class="box infomessage" %)
977 (((
978 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
979 )))
980
981 (((
982 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
983 )))
984
985 (((
986 01: Low,  00: High ,  11: No action
987 )))
988
989 [[image:image-20220524092754-5.png]]
990
991 (((
992 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
993 )))
994
995 (((
996 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
997 )))
998
999
1000 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1001
1002 * AT Command:
1003
1004 There is no AT Command to control Digital Output
1005
1006 * Downlink Payload (prefix 0xA9):
1007
1008 (% class="box infomessage" %)
1009 (((
1010 (((
1011 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1012 )))
1013 )))
1014
1015 This is to control the digital output time of DO pin. Include four bytes:
1016
1017 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1018
1019 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1020
1021 01: DO pins will change back to original state after timeout.
1022
1023 00: DO pins will change to an inverter state after timeout 
1024
1025 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1026
1027 [[image:image-20220524093238-6.png]]
1028
1029 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1030
1031 [[image:image-20220524093328-7.png]]
1032
1033 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1034
1035 [[image:image-20220524093351-8.png]]
1036
1037 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1038
1039 Latching time. Unit: ms
1040
1041 Device will upload a packet if downlink code executes successfully.
1042
1043 **Example payload:**
1044
1045 **~1. A9 01 01 01 01 07 D0**
1046
1047 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1048
1049 **2. A9 01 00 01 11 07 D0**
1050
1051 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1052
1053 **3. A9 00 00 00 00 07 D0**
1054
1055 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1056
1057 **4. A9 00 11 01 00 07 D0**
1058
1059 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
1060
1061
1062 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1063
1064 * AT Command:
1065
1066 There is no AT Command to control Relay Output
1067
1068 * Downlink Payload (prefix 0x03):
1069
1070 (% class="box infomessage" %)
1071 (((
1072 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1073 )))
1074
1075 (((
1076 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1077 )))
1078
1079 (((
1080 01: Close ,  00: Open , 11: No action
1081 )))
1082
1083 (((
1084 [[image:image-20220524093724-9.png]]
1085 )))
1086
1087 Device will upload a packet if downlink code executes successfully.
1088
1089
1090 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1091
1092 * AT Command:
1093
1094 There is no AT Command to control Relay Output
1095
1096 * Downlink Payload (prefix 0x05):
1097
1098 (% class="box infomessage" %)
1099 (((
1100 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1101 )))
1102
1103 This is to control the relay output time of relay. Include four bytes:
1104
1105 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1106
1107 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1108
1109 01: Relays will change back to original state after timeout.
1110
1111 00: Relays will change to an inverter state after timeout
1112
1113 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1114
1115 [[image:image-20220524093831-10.png]]
1116
1117 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1118
1119 Device will upload a packet if downlink code executes successfully.
1120
1121 **Example payload:**
1122
1123 **~1. 05 01 11 07 D0**
1124
1125 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1126
1127 **2. 05 01 10 07 D0**
1128
1129 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1130
1131 **3. 05 00 01 07 D0**
1132
1133 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1134
1135 **4. 05 00 00 07 D0**
1136
1137 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1138
1139
1140 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1141
1142 When voltage exceed the threshold, count. Feature see [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]
1143
1144 * AT Command:
1145
1146 (% class="box infomessage" %)
1147 (((
1148 **AT+VOLMAX    ~/~/ See [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]**
1149 )))
1150
1151 * Downlink Payload (prefix 0xA5):
1152
1153 (% class="box infomessage" %)
1154 (((
1155 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1156 )))
1157
1158
1159 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1160
1161 * AT Command:
1162
1163 (% class="box infomessage" %)
1164 (((
1165 **AT+SETCNT=aa,(bb cc dd ee) **
1166 )))
1167
1168 aa: 1: Set count1,
1169
1170 2: Set count2,
1171
1172 3: Set AV1 count
1173
1174 Bb cc dd ee: number to be set
1175
1176 * Downlink Payload (prefix 0xA8):
1177
1178 (% class="box infomessage" %)
1179 (((
1180 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1181 )))
1182
1183
1184 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1185
1186 Clear counting for counting mode
1187
1188 * AT Command:
1189
1190 (% class="box infomessage" %)
1191 (((
1192 **AT+CLRCOUNT ~/~/ clear all counting**
1193 )))
1194
1195 * Downlink Payload (prefix 0xA6):
1196
1197 (% class="box infomessage" %)
1198 (((
1199 **0x A6 01     ~/~/ clear all counting,**
1200 )))
1201
1202
1203 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1204
1205 * AT Command:
1206
1207 (% class="box infomessage" %)
1208 (((
1209 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1210 )))
1211
1212 * Downlink Payload (prefix 0xA7):
1213
1214 (% class="box infomessage" %)
1215 (((
1216 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1217 )))
1218
1219 (((
1220 range: aa bb cc:0 to 16777215,  (unit:second)
1221
1222
1223 )))
1224
1225 == 3.5 Integrate with Mydevice ==
1226
1227 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:
1228
1229 (((
1230 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1231 )))
1232
1233 (((
1234 **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:
1235 )))
1236
1237 [[image:1653356737703-362.png||height="232" width="732"]]
1238
1239 [[image:image-20220524094641-11.png||height="390" width="723"]]
1240
1241 [[image:image-20220524094641-12.png||height="402" width="718"]]
1242
1243 **Step 3**: Create an account or log in Mydevices.
1244
1245 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1246
1247 Search under The things network
1248
1249 [[image:1653356838789-523.png||height="337" width="740"]]
1250
1251
1252 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1253
1254 [[image:image-20220524094909-1.png||height="335" width="729"]]
1255
1256 [[image:image-20220524094909-2.png||height="337" width="729"]]
1257
1258 [[image:image-20220524094909-3.png||height="338" width="727"]]
1259
1260 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1261
1262 [[image:image-20220524094909-5.png||height="341" width="734"]]
1263
1264
1265 == 3.6 Interface Detail ==
1266
1267 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1268
1269 Support NPN Type sensor
1270
1271 [[image:1653356991268-289.png]]
1272
1273
1274 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1275
1276 (((
1277 The DI port of LT-22222-L can support NPN or PNP output sensor.
1278 )))
1279
1280 (((
1281 (((
1282 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
1283 )))
1284 )))
1285
1286 [[image:1653357170703-587.png]]
1287
1288 (((
1289 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1290 )))
1291
1292
1293 **Example1**: Connect to a Low active sensor.
1294
1295 This type of sensor will output a low signal GND when active.
1296
1297 * Connect sensor’s output to DI1-
1298 * Connect sensor’s VCC to DI1+.
1299
1300 So when sensor active, the current between NEC2501 pin1 and pin2 is： ​​
1301
1302 [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]** [[image:image-20220524095628-8.png]] = DI1+ / 1K.**
1303
1304 If DI1+ = 12v, the //IF// = 12mA , So the LT-22222-L will be able to detect this active signal.
1305
1306
1307 **Example2**: Connect to a High active sensor.
1308
1309 This type of sensor will output a high signal (example 24v) when active.
1310
1311 * Connect sensor’s output to DI1+
1312 * Connect sensor’s GND DI1-.
1313
1314 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1315
1316 [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]** [[image:image-20220524095628-8.png]]= DI1+ / 1K.**
1317
1318 If **DI1+ = 24v**, the [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**[[image:image-20220524095628-8.png]]** = 24mA , So the LT-22222-L will be able to detect this high active signal.
1319
1320
1321 **Example3**: Connect to a 220v high active sensor.
1322
1323 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1324
1325 * Connect sensor’s output to DI1+ with a serial 50K resistor
1326 * Connect sensor’s GND DI1-.
1327
1328 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1329
1330 [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**[[image:image-20220524095628-8.png]] = DI1+ / 51K.**
1331
1332 If sensor output is 220v, the (% 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.
1333
1334
1335 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1336
1337 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1338
1339 [[image:1653357531600-905.png]]
1340
1341
1342 === 3.6.4 Analog Input Interface ===
1343
1344 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:
1345
1346 **AC2 = (IN2 voltage )/12**
1347
1348 [[image:1653357592296-182.png]]
1349
1350 Example to connect a 4~~20mA sensor
1351
1352 We take the wind speed sensor as an example for reference only.
1353
1354 Specifications of the wind speed sensor:
1355
1356 Red:12~~24v
1357
1358 Yellow:4~~20mA
1359
1360 Black:GND
1361
1362
1363 Connection diagram:
1364
1365 [[image:1653357640609-758.png]]
1366
1367 [[image:1653357648330-671.png||height="155" width="733"]]
1368
1369
1370 === 3.6.5 Relay Output ===
1371
1372 (((
1373 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:
1374 )))
1375
1376 [[image:image-20220524100215-9.png]]
1377
1378 [[image:image-20220524100215-10.png||height="382" width="723"]]
1379
1380
1381 == 3.7 LEDs Indicators ==
1382
1383 [[image:image-20220524100748-11.png]]
1384
1385
1386 = 4. Use AT Command =
1387
1388 == 4.1 Access AT Command ==
1389
1390 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.
1391
1392 [[image:1653358238933-385.png]]
1393
1394 (((
1395 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:
1396 )))
1397
1398 [[image:1653358355238-883.png]]
1399
1400 (((
1401 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/]]
1402 )))
1403
1404 (((
1405 AT+<CMD>?        : Help on <CMD>
1406 )))
1407
1408 (((
1409 AT+<CMD>         : Run <CMD>
1410 )))
1411
1412 (((
1413 AT+<CMD>=<value> : Set the value
1414 )))
1415
1416 (((
1417 AT+<CMD>=?       : Get the value
1418 )))
1419
1420 (((
1421 ATZ: Trig a reset of the MCU
1422 )))
1423
1424 (((
1425 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1426 )))
1427
1428 (((
1429 AT+DEUI: Get or Set the Device EUI
1430 )))
1431
1432 (((
1433 AT+DADDR: Get or Set the Device Address
1434 )))
1435
1436 (((
1437 AT+APPKEY: Get or Set the Application Key
1438 )))
1439
1440 (((
1441 AT+NWKSKEY: Get or Set the Network Session Key
1442 )))
1443
1444 (((
1445 AT+APPSKEY: Get or Set the Application Session Key
1446 )))
1447
1448 (((
1449 AT+APPEUI: Get or Set the Application EUI
1450 )))
1451
1452 (((
1453 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1454 )))
1455
1456 (((
1457 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1458 )))
1459
1460 (((
1461 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1462 )))
1463
1464 (((
1465 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1466 )))
1467
1468 (((
1469 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1470 )))
1471
1472 (((
1473 AT+RX2FQ: Get or Set the Rx2 window frequency
1474 )))
1475
1476 (((
1477 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1478 )))
1479
1480 (((
1481 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1482 )))
1483
1484 (((
1485 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1486 )))
1487
1488 (((
1489 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1490 )))
1491
1492 (((
1493 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1494 )))
1495
1496 (((
1497 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1498 )))
1499
1500 (((
1501 AT+NWKID: Get or Set the Network ID
1502 )))
1503
1504 (((
1505 AT+FCU: Get or Set the Frame Counter Uplink
1506 )))
1507
1508 (((
1509 AT+FCD: Get or Set the Frame Counter Downlink
1510 )))
1511
1512 (((
1513 AT+CLASS: Get or Set the Device Class
1514 )))
1515
1516 (((
1517 AT+JOIN: Join network
1518 )))
1519
1520 (((
1521 AT+NJS: Get OTAA Join Status
1522 )))
1523
1524 (((
1525 AT+SENDB: Send hexadecimal data along with the application port
1526 )))
1527
1528 (((
1529 AT+SEND: Send text data along with the application port
1530 )))
1531
1532 (((
1533 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1534 )))
1535
1536 (((
1537 AT+RECV: Print last received data in raw format
1538 )))
1539
1540 (((
1541 AT+VER: Get current image version and Frequency Band
1542 )))
1543
1544 (((
1545 AT+CFM: Get or Set the confirmation mode (0-1)
1546 )))
1547
1548 (((
1549 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1550 )))
1551
1552 (((
1553 AT+SNR: Get the SNR of the last received packet
1554 )))
1555
1556 (((
1557 AT+RSSI: Get the RSSI of the last received packet
1558 )))
1559
1560 (((
1561 AT+TDC: Get or set the application data transmission interval in ms
1562 )))
1563
1564 (((
1565 AT+PORT: Get or set the application port
1566 )))
1567
1568 (((
1569 AT+DISAT: Disable AT commands
1570 )))
1571
1572 (((
1573 AT+PWORD: Set password, max 9 digits
1574 )))
1575
1576 (((
1577 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1578 )))
1579
1580 (((
1581 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1582 )))
1583
1584 (((
1585 AT+CFG: Print all settings
1586
1587
1588 )))
1589
1590 == 4.2 Common AT Command Sequence ==
1591
1592 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1593
1594 (((
1595 If device has not joined network yet:
1596 )))
1597
1598 (((
1599 (% style="background-color:#dcdcdc" %)123456
1600 )))
1601
1602 (((
1603 (% style="background-color:#dcdcdc" %)AT+FDR
1604 )))
1605
1606 (((
1607 (% style="background-color:#dcdcdc" %)123456
1608 )))
1609
1610 (((
1611 (% style="background-color:#dcdcdc" %)AT+NJM=0
1612 )))
1613
1614 (((
1615 (% style="background-color:#dcdcdc" %)ATZ
1616 )))
1617
1618
1619 (((
1620 If device already joined network:
1621 )))
1622
1623 (((
1624 (% style="background-color:#dcdcdc" %)AT+NJM=0
1625 )))
1626
1627 (((
1628 (% style="background-color:#dcdcdc" %)ATZ
1629
1630
1631 )))
1632
1633 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1634
1635 (((
1636 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1637 )))
1638
1639 (((
1640 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1641 )))
1642
1643 (((
1644 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1645 )))
1646
1647 (((
1648 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1649 )))
1650
1651 (((
1652 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1653 )))
1654
1655 (((
1656 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1657 )))
1658
1659 (((
1660 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1661 )))
1662
1663 (((
1664 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1665 )))
1666
1667 (((
1668 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1669 )))
1670
1671 (((
1672 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1673 )))
1674
1675 (((
1676 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1677 )))
1678
1679 (((
1680 (% 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.
1681 )))
1682
1683 (((
1684 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1685 )))
1686
1687 (((
1688 (% style="color:red" %)**Note:**
1689 )))
1690
1691 (((
1692 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1693 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1694 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.
1695 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
1696 )))
1697
1698 (((
1699 [[image:1653359097980-169.png||height="188" width="729"]]
1700 )))
1701
1702 (((
1703
1704 )))
1705
1706 === 4.2.3 Change to Class A ===
1707
1708 If sensor JOINED
1709 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1710 ATZ
1711
1712
1713 = 5. FAQ =
1714
1715 == 5.1 How to upgrade the image? ==
1716
1717 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1718
1719 * Support new features
1720 * For bug fix
1721 * Change LoRaWAN bands.
1722 Below shows the hardware connection for how to upload an image to the LT:
1723 * [[image:1653359603330-121.png]]
1724
1725 (((
1726 **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]].
1727 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1728 **Step3: **Open flashloader; choose the correct COM port to update.
1729 **For LT-22222-L**:
1730 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.
1731 )))
1732
1733 [[image:image-20220524103407-12.png]]
1734
1735 [[image:image-20220524103429-13.png]]
1736
1737 [[image:image-20220524104033-15.png]]
1738
1739 (% 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:
1740
1741 [[image:1653360054704-518.png||height="186" width="745"]]
1742
1743
1744 (((
1745 (((
1746 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1747 )))
1748 )))
1749
1750 (((
1751 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1752
1753
1754 )))
1755
1756 (((
1757 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1758 )))
1759
1760 (((
1761 (((
1762 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1763 )))
1764 )))
1765
1766 (((
1767 (((
1768 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1769 )))
1770 )))
1771
1772 (((
1773 (% 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.
1774 )))
1775
1776 (((
1777 [[image:1653360231087-571.png||height="401" width="727"]]
1778 )))
1779
1780 (((
1781 (% 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.
1782 )))
1783
1784 (((
1785 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1786 )))
1787
1788 (((
1789 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1790 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1791 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1792 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1793 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1794 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1795 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1796 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1797 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1798 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1799 )))
1800
1801 (((
1802 As shown in below:
1803 )))
1804
1805 [[image:1653360498588-932.png||height="485" width="726"]]
1806
1807
1808 == 5.4 Can I see counting event in Serial? ==
1809
1810 (((
1811 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.
1812
1813
1814 )))
1815
1816 (((
1817 = 6. Trouble Shooting =
1818 )))
1819
1820 (((
1821 (((
1822 == 6.1 Downlink doesn’t work, how to solve it? ==
1823 )))
1824 )))
1825
1826 (((
1827 Please see this link for how to debug:
1828
1829 [[http:~~/~~/wiki1.dragino.com/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/#H5.1Howitwork>>http://wiki1.dragino.com/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/#H5.1Howitwork]]
1830
1831
1832 )))
1833
1834 (((
1835 == 6.2 Have trouble to upload image. ==
1836 )))
1837
1838 (((
1839 See this link for trouble shooting:
1840
1841 [[http:~~/~~/wiki1.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/>>http://wiki1.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/]]
1842 )))
1843
1844 (((
1845
1846 )))
1847
1848 (((
1849 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1850 )))
1851
1852 (((
1853 It might be about the channels mapping. Please see this link for detail:
1854
1855 [[http:~~/~~/wiki1.dragino.com/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/#H2.NoticeofUS9152FCN4702FAU915Frequencyband>>http://wiki1.dragino.com/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/#H2.NoticeofUS9152FCN4702FAU915Frequencyband]]
1856 )))
1857
1858 (((
1859
1860 )))
1861
1862 (((
1863 = 7. Order Info =
1864 )))
1865
1866 (((
1867 (((
1868 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1869 )))
1870 )))
1871
1872 (((
1873 (((
1874 (% style="color:#4f81bd" %)**XXX:**
1875 )))
1876 )))
1877
1878 (((
1879 * (((
1880 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1881 )))
1882 )))
1883
1884 (((
1885 * (((
1886 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1887 )))
1888 )))
1889
1890 (((
1891 * (((
1892 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1893 )))
1894 )))
1895
1896 (((
1897 * (((
1898 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1899 )))
1900 )))
1901
1902 (((
1903 * (((
1904 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1905 )))
1906 )))
1907
1908 (((
1909 * (((
1910 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1911 )))
1912 )))
1913
1914 (((
1915 * (((
1916 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1917 )))
1918 )))
1919
1920 (((
1921 * (((
1922 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1923 )))
1924 )))
1925
1926 (((
1927 * (((
1928 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1929
1930
1931 )))
1932
1933 = 8. Packing Info =
1934 )))
1935
1936 (((
1937 (((
1938 **Package Includes**:
1939 )))
1940 )))
1941
1942 (((
1943 (((
1944 * LT-22222-L I/O Controller x 1
1945 * Stick Antenna for LoRa RF part x 1
1946 * Bracket for controller x1
1947 * Program cable x 1
1948 )))
1949 )))
1950
1951 (((
1952 (((
1953 **Dimension and weight**:
1954 )))
1955 )))
1956
1957 (((
1958 (((
1959 * Device Size: 13.5 x 7 x 3 cm
1960 * Device Weight: 105g
1961 * Package Size / pcs : 14.5 x 8 x 5 cm
1962 * Weight / pcs : 170g
1963
1964
1965 )))
1966 )))
1967
1968 (((
1969 = 9. Support =
1970 )))
1971
1972 * (((
1973 (((
1974 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.
1975 )))
1976 )))
1977 * (((
1978 (((
1979 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
1980 )))
1981 )))
1982
1983 (((
1984 (((
1985 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
1986
1987
1988 )))
1989
1990 (((
1991 = 10. Reference​​​​​ =
1992
1993 * Product Page:
1994
1995 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]]
1996
1997 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
1998 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1999 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2000 )))
2001 )))