Version 75.18 by Xiaoling on 2022/06/01 17:48
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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 (% 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.
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 an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa 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 = 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
273 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
274
275 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
276
277 [[image:image-20220523174024-3.png]]
278
279 (((
280 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
281 )))
282
283 [[image:image-20220523174254-4.png]]
284
285 * RO is for relay. ROx=1 : close，ROx=0 always open.
286 * DI is for digital input. DIx=1: high or float, DIx=0: low.
287 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
288
289 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
290
291 For example if payload is: [[image:image-20220523175847-2.png]]
292
293 **The value for the interface is:  **
294
295 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
296
297 AVI2 channel voltage is 0x04AC/1000=1.196V
298
299 ACI1 channel current is 0x1310/1000=4.880mA
300
301 ACI2 channel current is 0x1300/1000=4.864mA
302
303 The last byte 0xAA= 10101010(B) means
304
305 * [1] RO1 relay channel is close and the RO1 LED is ON.
306 * [0] RO2 relay channel is open and RO2 LED is OFF;
307
308 **LT22222-L:**
309
310 * [1] DI2 channel is high input and DI2 LED is ON;
311 * [0] DI1 channel is low input;
312
313 * [0] DO3 channel output state
314 ** DO3 is float in case no load between DO3 and V+.;
315 ** DO3 is high in case there is load between DO3 and V+.
316 ** DO3 LED is off in both case
317 * [1] DO2 channel output is low and DO2 LED is ON.
318 * [0] DO1 channel output state
319 ** DO1 is float in case no load between DO1 and V+.;
320 ** DO1 is high in case there is load between DO1 and V+.
321 ** DO1 LED is off in both case
322
323
324 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
325
326 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
327
328 (((
329 Total : 11 bytes payload
330 )))
331
332 [[image:image-20220523180452-3.png]]
333
334 (((
335 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
336 )))
337
338 [[image:image-20220523180506-4.png]]
339
340 * RO is for relay. ROx=1 : close，ROx=0 always open.
341 * FIRST: Indicate this is the first packet after join network.
342 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
343
344 (((
345 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
346 )))
347
348 (((
349 **To use counting mode, please run:**
350 )))
351
352 (% class="box infomessage" %)
353 (((
354 (((
355 **AT+MOD=2**
356 )))
357 )))
358
359 (% class="box infomessage" %)
360 (((
361 (((
362 **ATZ**
363 )))
364 )))
365
366 (((
367 (% style="color:#4f81bd" %)**AT Commands for counting:**
368 )))
369
370 (((
371 **For LT22222-L:**
372 )))
373
374 (% class="box infomessage" %)
375 (((
376 (((
377 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
378 )))
379 )))
380
381 (% class="box infomessage" %)
382 (((
383 (((
384 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
385 )))
386 )))
387
388 (% class="box infomessage" %)
389 (((
390 (((
391 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
392 )))
393 )))
394
395 (% class="box infomessage" %)
396 (((
397 (((
398 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
399 )))
400 )))
401
402 (% class="box infomessage" %)
403 (((
404 (((
405 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
406 )))
407 )))
408
409 (% class="box infomessage" %)
410 (((
411 (((
412 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
413 )))
414 )))
415
416
417 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
418
419 **LT22222-L**: This mode the DI1 is used as a counting pin.
420
421 [[image:image-20220523181246-5.png]]
422
423 (((
424 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
425 )))
426
427 [[image:image-20220523181301-6.png]]
428
429 * RO is for relay. ROx=1 : close，ROx=0 always open.
430 * FIRST: Indicate this is the first packet after join network.
431 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
432
433 (((
434 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
435 )))
436
437 (((
438 **To use counting mode, please run:**
439 )))
440
441 (% class="box infomessage" %)
442 (((
443 (((
444 **AT+MOD=3**
445 )))
446 )))
447
448 (% class="box infomessage" %)
449 (((
450 (((
451 **ATZ**
452 )))
453 )))
454
455 (((
456 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
457
458
459 )))
460
461 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
462
463 **LT22222-L**: This mode the DI1 is used as a counting pin.
464
465 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.
466
467 [[image:image-20220523181903-8.png]]
468
469 (((
470 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
471 )))
472
473 [[image:image-20220523181727-7.png]]
474
475 * RO is for relay. ROx=1 : close，ROx=0 always open.
476 * FIRST: Indicate this is the first packet after join network.
477 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
478
479 (((
480 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
481 )))
482
483 (((
484 **To use this mode, please run:**
485 )))
486
487 (% class="box infomessage" %)
488 (((
489 (((
490 **AT+MOD=4**
491 )))
492 )))
493
494 (% class="box infomessage" %)
495 (((
496 (((
497 **ATZ**
498 )))
499 )))
500
501 (((
502
503 )))
504
505 (((
506 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
507 )))
508
509 (((
510 **Plus below command for AVI1 Counting:**
511 )))
512
513 (% class="box infomessage" %)
514 (((
515 (((
516 **AT+SETCNT=3,60   (set AVI Count to 60)**
517 )))
518 )))
519
520 (% class="box infomessage" %)
521 (((
522 (((
523 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
524 )))
525 )))
526
527 (% class="box infomessage" %)
528 (((
529 (((
530 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
531 )))
532 )))
533
534 (% class="box infomessage" %)
535 (((
536 (((
537 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
538 )))
539 )))
540
541
542 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
543
544 **LT22222-L**: This mode the DI1 is used as a counting pin.
545
546 [[image:image-20220523182334-9.png]]
547
548 (((
549 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
550 )))
551
552 * RO is for relay. ROx=1 : close，ROx=0 always open.
553 * FIRST: Indicate this is the first packet after join network.
554 * (((
555 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
556 )))
557
558 (((
559 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
560 )))
561
562 (((
563 **To use this mode, please run:**
564 )))
565
566 (% class="box infomessage" %)
567 (((
568 (((
569 **AT+MOD=5**
570 )))
571 )))
572
573 (% class="box infomessage" %)
574 (((
575 (((
576 **ATZ**
577 )))
578 )))
579
580 (((
581 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
582
583
584 )))
585
586 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
587
588 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
589
590 For example, if user has configured below commands:
591
592 * **AT+MOD=1 ** **~-~->** The normal working mode
593 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
594
595 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
596
597 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
598 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.**
599
600 **AT Command to set Trigger Condition**:
601
602 (% style="color:#4f81bd" %)**Trigger base on voltage**:
603
604 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
605
606 **Example:**
607
608 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)
609
610 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
611
612
613 (% style="color:#4f81bd" %)**Trigger base on current**:
614
615 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
616
617 **Example:**
618
619 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
620
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: [[End Device AT Commands and Downlink Command>>doc:Main.End Device AT Commands and Downlink Command.WebHome]]
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 === 3.4.1 Common Commands ===
730
731 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]]
732
733
734 === 3.4.2 Sensor related commands ===
735
736 ==== 3.4.2.1 Set Transmit Interval ====
737
738 Set device uplink interval.
739
740 * AT Command:
741
742 (% class="box infomessage" %)
743 (((
744 **AT+TDC=N **
745 )))
746
747 **Example: **AT+TDC=30000. Means set interval to 30 seconds
748
749 * Downlink Payload (prefix 0x01):
750
751 (% class="box infomessage" %)
752 (((
753 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
754 )))
755
756
757 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
758
759 Set work mode.
760
761 * AT Command:
762
763 (% class="box infomessage" %)
764 (((
765 **AT+MOD=N  **
766 )))
767
768 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
769
770 * Downlink Payload (prefix 0x0A):
771
772 (% class="box infomessage" %)
773 (((
774 **0x0A aa     ~/~/ Same as AT+MOD=aa**
775 )))
776
777
778 ==== 3.4.2.3 Poll an uplink ====
779
780 * AT Command:
781
782 There is no AT Command to poll uplink
783
784 * Downlink Payload (prefix 0x08):
785
786 (% class="box infomessage" %)
787 (((
788 **0x08 FF     ~/~/ Poll an uplink,**
789 )))
790
791 **Example**: 0x08FF, ask device to send an Uplink
792
793
794 ==== 3.4.2.4 Enable Trigger Mode ====
795
796 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
797
798 * AT Command:
799
800 (% class="box infomessage" %)
801 (((
802 **AT+ADDMOD6=1 or 0**
803 )))
804
805 1: Enable Trigger Mode
806
807 0: Disable Trigger Mode
808
809 * Downlink Payload (prefix 0x0A 06):
810
811 (% class="box infomessage" %)
812 (((
813 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
814 )))
815
816
817 ==== 3.4.2.5 Poll trigger settings ====
818
819 Poll trigger settings,
820
821 * AT Command:
822
823 There is no AT Command for this feature.
824
825 * Downlink Payload (prefix 0x AB 06):
826
827 (% class="box infomessage" %)
828 (((
829 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
830 )))
831
832
833 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
834
835 Enable Disable DI1/DI2/DI2 as trigger,
836
837 * AT Command:
838
839 (% class="box infomessage" %)
840 (((
841 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
842 )))
843
844 **Example:**
845
846 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
847
848 * Downlink Payload (prefix 0xAA 02):
849
850 (% class="box infomessage" %)
851 (((
852 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
853 )))
854
855
856 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
857
858 Set DI1 or DI3(for LT-33222-L) trigger.
859
860 * AT Command:
861
862 (% class="box infomessage" %)
863 (((
864 **AT+TRIG1=a,b**
865 )))
866
867 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
868
869 b : delay timing.
870
871 **Example:**
872
873 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
874
875 * Downlink Payload (prefix 0x09 01 ):
876
877 (% class="box infomessage" %)
878 (((
879 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
880 )))
881
882
883 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
884
885 Set DI2 trigger.
886
887 * AT Command:
888
889 (% class="box infomessage" %)
890 (((
891 **AT+TRIG2=a,b**
892 )))
893
894 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
895
896 b : delay timing.
897
898 **Example:**
899
900 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
901
902 * Downlink Payload (prefix 0x09 02 ):
903
904 (% class="box infomessage" %)
905 (((
906 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
907 )))
908
909
910 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
911
912 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
913
914 * AT Command:
915
916 (% class="box infomessage" %)
917 (((
918 **AT+ACLIM. **
919 )))
920
921 * Downlink Payload (prefix 0xAA 01 ):
922
923 (% class="box infomessage" %)
924 (((
925 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
926 )))
927
928
929 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
930
931 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
932
933 * AT Command:
934
935 (% class="box infomessage" %)
936 (((
937 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
938 )))
939
940 * Downlink Payload (prefix 0xAA 00 ):
941
942 (% class="box infomessage" %)
943 (((
944 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
945 )))
946
947
948 ==== 3.4.2.11 Trigger – Set minimum interval ====
949
950 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
951
952 * AT Command:
953
954 (% class="box infomessage" %)
955 (((
956 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
957 )))
958
959 * Downlink Payload (prefix 0xAC ):
960
961 (% class="box infomessage" %)
962 (((
963 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
964 )))
965
966
967 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
968
969 * AT Command:
970
971 There is no AT Command to control Digital Output
972
973 * Downlink Payload (prefix 0x02):
974
975 (% class="box infomessage" %)
976 (((
977 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
978 )))
979
980 (((
981 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
982 )))
983
984 (((
985 01: Low,  00: High ,  11: No action
986 )))
987
988 [[image:image-20220524092754-5.png]]
989
990 (((
991 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
992 )))
993
994 (((
995 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
996 )))
997
998
999 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1000
1001 * AT Command:
1002
1003 There is no AT Command to control Digital Output
1004
1005 * Downlink Payload (prefix 0xA9):
1006
1007 (% class="box infomessage" %)
1008 (((
1009 (((
1010 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1011 )))
1012 )))
1013
1014 This is to control the digital output time of DO pin. Include four bytes:
1015
1016 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1017
1018 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1019
1020 01: DO pins will change back to original state after timeout.
1021
1022 00: DO pins will change to an inverter state after timeout 
1023
1024 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1025
1026 [[image:image-20220524093238-6.png]]
1027
1028 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1029
1030 [[image:image-20220524093328-7.png]]
1031
1032 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1033
1034 [[image:image-20220524093351-8.png]]
1035
1036 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1037
1038 Latching time. Unit: ms
1039
1040 Device will upload a packet if downlink code executes successfully.
1041
1042 **Example payload:**
1043
1044 **~1. A9 01 01 01 01 07 D0**
1045
1046 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1047
1048 **2. A9 01 00 01 11 07 D0**
1049
1050 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1051
1052 **3. A9 00 00 00 00 07 D0**
1053
1054 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1055
1056 **4. A9 00 11 01 00 07 D0**
1057
1058 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
1059
1060
1061 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1062
1063 * AT Command:
1064
1065 There is no AT Command to control Relay Output
1066
1067 * Downlink Payload (prefix 0x03):
1068
1069 (% class="box infomessage" %)
1070 (((
1071 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1072 )))
1073
1074 (((
1075 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1076 )))
1077
1078 (((
1079 01: Close ,  00: Open , 11: No action
1080 )))
1081
1082 (((
1083 [[image:image-20220524093724-9.png]]
1084 )))
1085
1086 Device will upload a packet if downlink code executes successfully.
1087
1088
1089 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1090
1091 * AT Command:
1092
1093 There is no AT Command to control Relay Output
1094
1095 * Downlink Payload (prefix 0x05):
1096
1097 (% class="box infomessage" %)
1098 (((
1099 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1100 )))
1101
1102 This is to control the relay output time of relay. Include four bytes:
1103
1104 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1105
1106 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1107
1108 01: Relays will change back to original state after timeout.
1109
1110 00: Relays will change to an inverter state after timeout
1111
1112 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1113
1114 [[image:image-20220524093831-10.png]]
1115
1116 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1117
1118 Device will upload a packet if downlink code executes successfully.
1119
1120 **Example payload:**
1121
1122 **~1. 05 01 11 07 D0**
1123
1124 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1125
1126 **2. 05 01 10 07 D0**
1127
1128 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1129
1130 **3. 05 00 01 07 D0**
1131
1132 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1133
1134 **4. 05 00 00 07 D0**
1135
1136 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1137
1138
1139 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1140
1141 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1142
1143 * AT Command:
1144
1145 (% class="box infomessage" %)
1146 (((
1147 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1148 )))
1149
1150 * Downlink Payload (prefix 0xA5):
1151
1152 (% class="box infomessage" %)
1153 (((
1154 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1155 )))
1156
1157
1158 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1159
1160 * AT Command:
1161
1162 (% class="box infomessage" %)
1163 (((
1164 **AT+SETCNT=aa,(bb cc dd ee) **
1165 )))
1166
1167 aa: 1: Set count1,
1168
1169 2: Set count2,
1170
1171 3: Set AV1 count
1172
1173 Bb cc dd ee: number to be set
1174
1175 * Downlink Payload (prefix 0xA8):
1176
1177 (% class="box infomessage" %)
1178 (((
1179 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1180 )))
1181
1182
1183 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1184
1185 Clear counting for counting mode
1186
1187 * AT Command:
1188
1189 (% class="box infomessage" %)
1190 (((
1191 **AT+CLRCOUNT ~/~/ clear all counting**
1192 )))
1193
1194 * Downlink Payload (prefix 0xA6):
1195
1196 (% class="box infomessage" %)
1197 (((
1198 **0x A6 01     ~/~/ clear all counting,**
1199 )))
1200
1201
1202 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1203
1204 * AT Command:
1205
1206 (% class="box infomessage" %)
1207 (((
1208 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1209 )))
1210
1211 * Downlink Payload (prefix 0xA7):
1212
1213 (% class="box infomessage" %)
1214 (((
1215 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1216 )))
1217
1218 (((
1219 range: aa bb cc:0 to 16777215,  (unit:second)
1220
1221
1222 )))
1223
1224 == 3.5 Integrate with Mydevice ==
1225
1226 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:
1227
1228 (((
1229 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1230 )))
1231
1232 (((
1233 **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:
1234 )))
1235
1236 [[image:1653356737703-362.png||height="232" width="732"]]
1237
1238 [[image:image-20220524094641-11.png||height="390" width="723"]]
1239
1240 [[image:image-20220524094641-12.png||height="402" width="718"]]
1241
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 (((
1290 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1291 )))
1292 )))
1293
1294 (((
1295
1296 )))
1297
1298 (((
1299 **Example1**: Connect to a Low active sensor.
1300 )))
1301
1302 (((
1303 This type of sensor will output a low signal GND when active.
1304 )))
1305
1306 * (((
1307 Connect sensor’s output to DI1-
1308 )))
1309 * (((
1310 Connect sensor’s VCC to DI1+.
1311 )))
1312
1313 (((
1314 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1315 )))
1316
1317 (((
1318 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1319 )))
1320
1321 (((
1322 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.
1323 )))
1324
1325 (((
1326
1327 )))
1328
1329 (((
1330 **Example2**: Connect to a High active sensor.
1331 )))
1332
1333 (((
1334 This type of sensor will output a high signal (example 24v) when active.
1335 )))
1336
1337 * (((
1338 Connect sensor’s output to DI1+
1339 )))
1340 * (((
1341 Connect sensor’s GND DI1-.
1342 )))
1343
1344 (((
1345 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1346 )))
1347
1348 (((
1349 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1350 )))
1351
1352 (((
1353 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.
1354 )))
1355
1356 (((
1357
1358 )))
1359
1360 (((
1361 **Example3**: Connect to a 220v high active sensor.
1362 )))
1363
1364 (((
1365 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1366 )))
1367
1368 * (((
1369 Connect sensor’s output to DI1+ with a serial 50K resistor
1370 )))
1371 * (((
1372 Connect sensor’s GND DI1-.
1373 )))
1374
1375 (((
1376 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1377 )))
1378
1379 (((
1380 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1381 )))
1382
1383 (((
1384 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.
1385 )))
1386
1387
1388 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1389
1390 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1391
1392 [[image:1653357531600-905.png]]
1393
1394
1395 === 3.6.4 Analog Input Interface ===
1396
1397 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:
1398
1399 **AC2 = (IN2 voltage )/12**
1400
1401 [[image:1653357592296-182.png]]
1402
1403 Example to connect a 4~~20mA sensor
1404
1405 We take the wind speed sensor as an example for reference only.
1406
1407 Specifications of the wind speed sensor:
1408
1409 Red:12~~24v
1410
1411 Yellow:4~~20mA
1412
1413 Black:GND
1414
1415
1416 Connection diagram:
1417
1418 [[image:1653357640609-758.png]]
1419
1420 [[image:1653357648330-671.png||height="155" width="733"]]
1421
1422
1423 === 3.6.5 Relay Output ===
1424
1425 (((
1426 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:
1427 )))
1428
1429 [[image:image-20220524100215-9.png]]
1430
1431 [[image:image-20220524100215-10.png||height="382" width="723"]]
1432
1433
1434 == 3.7 LEDs Indicators ==
1435
1436 [[image:image-20220524100748-11.png]]
1437
1438
1439 = 4. Use AT Command =
1440
1441 == 4.1 Access AT Command ==
1442
1443 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.
1444
1445 [[image:1653358238933-385.png]]
1446
1447 (((
1448 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:
1449 )))
1450
1451 [[image:1653358355238-883.png]]
1452
1453 (((
1454 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/]]
1455 )))
1456
1457 (((
1458 AT+<CMD>?        : Help on <CMD>
1459 )))
1460
1461 (((
1462 AT+<CMD>         : Run <CMD>
1463 )))
1464
1465 (((
1466 AT+<CMD>=<value> : Set the value
1467 )))
1468
1469 (((
1470 AT+<CMD>=?       : Get the value
1471 )))
1472
1473 (((
1474 ATZ: Trig a reset of the MCU
1475 )))
1476
1477 (((
1478 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1479 )))
1480
1481 (((
1482 AT+DEUI: Get or Set the Device EUI
1483 )))
1484
1485 (((
1486 AT+DADDR: Get or Set the Device Address
1487 )))
1488
1489 (((
1490 AT+APPKEY: Get or Set the Application Key
1491 )))
1492
1493 (((
1494 AT+NWKSKEY: Get or Set the Network Session Key
1495 )))
1496
1497 (((
1498 AT+APPSKEY: Get or Set the Application Session Key
1499 )))
1500
1501 (((
1502 AT+APPEUI: Get or Set the Application EUI
1503 )))
1504
1505 (((
1506 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1507 )))
1508
1509 (((
1510 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1511 )))
1512
1513 (((
1514 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1515 )))
1516
1517 (((
1518 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1519 )))
1520
1521 (((
1522 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1523 )))
1524
1525 (((
1526 AT+RX2FQ: Get or Set the Rx2 window frequency
1527 )))
1528
1529 (((
1530 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1531 )))
1532
1533 (((
1534 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1535 )))
1536
1537 (((
1538 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1539 )))
1540
1541 (((
1542 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1543 )))
1544
1545 (((
1546 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1547 )))
1548
1549 (((
1550 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1551 )))
1552
1553 (((
1554 AT+NWKID: Get or Set the Network ID
1555 )))
1556
1557 (((
1558 AT+FCU: Get or Set the Frame Counter Uplink
1559 )))
1560
1561 (((
1562 AT+FCD: Get or Set the Frame Counter Downlink
1563 )))
1564
1565 (((
1566 AT+CLASS: Get or Set the Device Class
1567 )))
1568
1569 (((
1570 AT+JOIN: Join network
1571 )))
1572
1573 (((
1574 AT+NJS: Get OTAA Join Status
1575 )))
1576
1577 (((
1578 AT+SENDB: Send hexadecimal data along with the application port
1579 )))
1580
1581 (((
1582 AT+SEND: Send text data along with the application port
1583 )))
1584
1585 (((
1586 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1587 )))
1588
1589 (((
1590 AT+RECV: Print last received data in raw format
1591 )))
1592
1593 (((
1594 AT+VER: Get current image version and Frequency Band
1595 )))
1596
1597 (((
1598 AT+CFM: Get or Set the confirmation mode (0-1)
1599 )))
1600
1601 (((
1602 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1603 )))
1604
1605 (((
1606 AT+SNR: Get the SNR of the last received packet
1607 )))
1608
1609 (((
1610 AT+RSSI: Get the RSSI of the last received packet
1611 )))
1612
1613 (((
1614 AT+TDC: Get or set the application data transmission interval in ms
1615 )))
1616
1617 (((
1618 AT+PORT: Get or set the application port
1619 )))
1620
1621 (((
1622 AT+DISAT: Disable AT commands
1623 )))
1624
1625 (((
1626 AT+PWORD: Set password, max 9 digits
1627 )))
1628
1629 (((
1630 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1631 )))
1632
1633 (((
1634 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1635 )))
1636
1637 (((
1638 AT+CFG: Print all settings
1639
1640
1641 )))
1642
1643 == 4.2 Common AT Command Sequence ==
1644
1645 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1646
1647 (((
1648 If device has not joined network yet:
1649 )))
1650
1651 (((
1652 (% style="background-color:#dcdcdc" %)123456
1653 )))
1654
1655 (((
1656 (% style="background-color:#dcdcdc" %)AT+FDR
1657 )))
1658
1659 (((
1660 (% style="background-color:#dcdcdc" %)123456
1661 )))
1662
1663 (((
1664 (% style="background-color:#dcdcdc" %)AT+NJM=0
1665 )))
1666
1667 (((
1668 (% style="background-color:#dcdcdc" %)ATZ
1669 )))
1670
1671
1672 (((
1673 If device already joined network:
1674 )))
1675
1676 (((
1677 (% style="background-color:#dcdcdc" %)AT+NJM=0
1678 )))
1679
1680 (((
1681 (% style="background-color:#dcdcdc" %)ATZ
1682
1683
1684 )))
1685
1686 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1687
1688 (((
1689 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1690 )))
1691
1692 (((
1693 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1694 )))
1695
1696 (((
1697 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1698 )))
1699
1700 (((
1701 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1702 )))
1703
1704 (((
1705 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1706 )))
1707
1708 (((
1709 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1710 )))
1711
1712 (((
1713 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1714 )))
1715
1716 (((
1717 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1718 )))
1719
1720 (((
1721 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1722 )))
1723
1724 (((
1725 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1726 )))
1727
1728 (((
1729 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1730 )))
1731
1732 (((
1733 (% 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.
1734 )))
1735
1736 (((
1737 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1738 )))
1739
1740 (((
1741 (% style="color:red" %)**Note:**
1742 )))
1743
1744 (((
1745 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1746 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1747 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.
1748 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
1749 )))
1750
1751 (((
1752 [[image:1653359097980-169.png||height="188" width="729"]]
1753 )))
1754
1755 (((
1756
1757 )))
1758
1759 === 4.2.3 Change to Class A ===
1760
1761 If sensor JOINED
1762 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1763 ATZ
1764
1765
1766 = 5. FAQ =
1767
1768 == 5.1 How to upgrade the image? ==
1769
1770 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1771
1772 * Support new features
1773 * For bug fix
1774 * Change LoRaWAN bands.
1775 Below shows the hardware connection for how to upload an image to the LT:
1776 * [[image:1653359603330-121.png]]
1777
1778 (((
1779 **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]].
1780 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1781 **Step3: **Open flashloader; choose the correct COM port to update.
1782 **For LT-22222-L**:
1783 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.
1784 )))
1785
1786 [[image:image-20220524103407-12.png]]
1787
1788 [[image:image-20220524103429-13.png]]
1789
1790 [[image:image-20220524104033-15.png]]
1791
1792 (% 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:
1793
1794 [[image:1653360054704-518.png||height="186" width="745"]]
1795
1796
1797 (((
1798 (((
1799 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1800 )))
1801 )))
1802
1803 (((
1804 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1805
1806
1807 )))
1808
1809 (((
1810 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1811 )))
1812
1813 (((
1814 (((
1815 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1816 )))
1817 )))
1818
1819 (((
1820 (((
1821 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1822 )))
1823 )))
1824
1825 (((
1826 (% 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.
1827 )))
1828
1829 (((
1830 [[image:1653360231087-571.png||height="401" width="727"]]
1831 )))
1832
1833 (((
1834 (% 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.
1835 )))
1836
1837 (((
1838 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1839 )))
1840
1841 (((
1842 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1843 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1844 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1845 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1846 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1847 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1848 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1849 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1850 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1851 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1852 )))
1853
1854 (((
1855 As shown in below:
1856 )))
1857
1858 [[image:1653360498588-932.png||height="485" width="726"]]
1859
1860
1861 == 5.4 Can I see counting event in Serial? ==
1862
1863 (((
1864 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.
1865
1866
1867 )))
1868
1869 (((
1870 = 6. Trouble Shooting =
1871 )))
1872
1873 (((
1874 (((
1875 == 6.1 Downlink doesn’t work, how to solve it? ==
1876 )))
1877 )))
1878
1879 (((
1880 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1881
1882
1883 )))
1884
1885 (((
1886 == 6.2 Have trouble to upload image. ==
1887 )))
1888
1889 (((
1890 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1891 )))
1892
1893 (((
1894
1895 )))
1896
1897 (((
1898 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1899 )))
1900
1901 (((
1902 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1903 )))
1904
1905 (((
1906
1907 )))
1908
1909 (((
1910 = 7. Order Info =
1911 )))
1912
1913 (((
1914 (((
1915 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1916 )))
1917 )))
1918
1919 (((
1920 (((
1921 (% style="color:#4f81bd" %)**XXX:**
1922 )))
1923 )))
1924
1925 (((
1926 * (((
1927 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1928 )))
1929 )))
1930
1931 (((
1932 * (((
1933 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1934 )))
1935 )))
1936
1937 (((
1938 * (((
1939 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1940 )))
1941 )))
1942
1943 (((
1944 * (((
1945 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1946 )))
1947 )))
1948
1949 (((
1950 * (((
1951 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1952 )))
1953 )))
1954
1955 (((
1956 * (((
1957 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1958 )))
1959 )))
1960
1961 (((
1962 * (((
1963 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1964 )))
1965 )))
1966
1967 (((
1968 * (((
1969 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1970 )))
1971 )))
1972
1973 (((
1974 * (((
1975 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1976
1977
1978 )))
1979
1980 = 8. Packing Info =
1981 )))
1982
1983 (((
1984 (((
1985 **Package Includes**:
1986 )))
1987 )))
1988
1989 (((
1990 (((
1991 * LT-22222-L I/O Controller x 1
1992 * Stick Antenna for LoRa RF part x 1
1993 * Bracket for controller x1
1994 * Program cable x 1
1995 )))
1996 )))
1997
1998 (((
1999 (((
2000 **Dimension and weight**:
2001 )))
2002 )))
2003
2004 (((
2005 (((
2006 * Device Size: 13.5 x 7 x 3 cm
2007 * Device Weight: 105g
2008 * Package Size / pcs : 14.5 x 8 x 5 cm
2009 * Weight / pcs : 170g
2010
2011
2012 )))
2013 )))
2014
2015 (((
2016 = 9. Support =
2017 )))
2018
2019 * (((
2020 (((
2021 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.
2022 )))
2023 )))
2024 * (((
2025 (((
2026 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
2027 )))
2028 )))
2029
2030 (((
2031 (((
2032 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2033
2034
2035 )))
2036
2037 (((
2038 = 10. Reference​​​​​ =
2039
2040 * Product Page:
2041
2042 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]]
2043
2044 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2045 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2046 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2047 )))
2048 )))

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