Version 80.3 by Xiaoling on 2022/06/10 10:20
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1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
3
4 **LT-22222-L LoRa IO Controller User Manual **
5
6
7 **Table of Contents:**
8
9 {{toc/}}
10
11
12
13
14
15
16
17 = 1.Introduction =
18
19 == 1.1 What is LT Series I/O Controller ==
20
21 (((
22 The Dragino (% style="color:blue" %)**LT series I/O Modules**(%%) are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as:** (% style="color:blue" %)analog current Input, analog voltage input(%%)**(% style="color:blue" %), **relay output**, **digital input**(%%) and (% style="color:blue" %)**digital output**(%%) etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
23 )))
24
25 (((
26 The LT I/O Controllers allows the user to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.
27 )))
28
29 (((
30 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
31 )))
32
33 (((
34 The use environment includes:
35 )))
36
37 (((
38 1) If user’s area has LoRaWAN service coverage, they can just install the I/O controller and configure it to connect the LoRaWAN provider via wireless.
39 )))
40
41 (((
42 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
43 )))
44
45 (((
46 [[image:1653295757274-912.png]]
47
48
49 )))
50
51
52 == 1.2  Specifications ==
53
54 (((
55
56
57 **Hardware System:**
58 )))
59
60 * (((
61 STM32L072CZT6 MCU
62 )))
63 * (((
64 SX1276/78 Wireless Chip 
65 )))
66 * (((
67 (((
68 Power Consumption:
69 )))
70
71 * (((
72 Idle: 4mA@12v
73 )))
74 * (((
75 20dB Transmit: 34mA@12v
76 )))
77 )))
78
79 (((
80
81
82 **Interface for Model: LT22222-L:**
83 )))
84
85 * (((
86 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
87 )))
88 * (((
89 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
90 )))
91 * (((
92 2 x Relay Output (5A@250VAC / 30VDC)
93 )))
94 * (((
95 2 x 0~~20mA Analog Input (res:0.01mA)
96 )))
97 * (((
98 2 x 0~~30V Analog Input (res:0.01v)
99 )))
100 * (((
101 Power Input 7~~ 24V DC. 
102 )))
103
104 (((
105
106
107 **LoRa Spec:**
108 )))
109
110 * (((
111 (((
112 Frequency Range:
113 )))
114
115 * (((
116 Band 1 (HF): 862 ~~ 1020 Mhz
117 )))
118 * (((
119 Band 2 (LF): 410 ~~ 528 Mhz
120 )))
121 )))
122 * (((
123 168 dB maximum link budget.
124 )))
125 * (((
126 +20 dBm - 100 mW constant RF output vs.
127 )))
128 * (((
129 +14 dBm high efficiency PA.
130 )))
131 * (((
132 Programmable bit rate up to 300 kbps.
133 )))
134 * (((
135 High sensitivity: down to -148 dBm.
136 )))
137 * (((
138 Bullet-proof front end: IIP3 = -12.5 dBm.
139 )))
140 * (((
141 Excellent blocking immunity.
142 )))
143 * (((
144 Low RX current of 10.3 mA, 200 nA register retention.
145 )))
146 * (((
147 Fully integrated synthesizer with a resolution of 61 Hz.
148 )))
149 * (((
150 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
151 )))
152 * (((
153 Built-in bit synchronizer for clock recovery.
154 )))
155 * (((
156 Preamble detection.
157 )))
158 * (((
159 127 dB Dynamic Range RSSI.
160 )))
161 * (((
162 Automatic RF Sense and CAD with ultra-fast AFC.
163 )))
164 * (((
165 Packet engine up to 256 bytes with CRC.
166 )))
167
168
169
170 == 1.3 Features ==
171
172 * LoRaWAN Class A & Class C protocol
173 * Optional Customized LoRa Protocol
174 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
175 * AT Commands to change parameters
176 * Remote configure parameters via LoRa Downlink
177 * Firmware upgradable via program port
178 * Counting
179
180
181
182 == 1.4  Applications ==
183
184 * Smart Buildings & Home Automation
185 * Logistics and Supply Chain Management
186 * Smart Metering
187 * Smart Agriculture
188 * Smart Cities
189 * Smart Factory
190
191
192
193 == 1.5 Hardware Variants ==
194
195 (% border="1" style="background-color:#f7faff; width:500px" %)
196 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
197 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
198 * 2 x Digital Input (Bi-direction)
199 * 2 x Digital Output
200 * 2 x Relay Output (5A@250VAC / 30VDC)
201 * 2 x 0~~20mA Analog Input (res:0.01mA)
202 * 2 x 0~~30V Analog Input (res:0.01v)
203 * 1 x Counting Port
204 )))
205
206
207
208 = 2. Power ON Device =
209
210 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.
211
212 (((
213 PWR will on when device is properly powered.
214 )))
215
216 [[image:1653297104069-180.png]]
217
218
219
220 = 3. Operation Mode =
221
222 == 3.1 How it works? ==
223
224 (((
225 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. 
226 )))
227
228 (((
229 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.
230 )))
231
232
233 == 3.2 Example to join LoRaWAN network ==
234
235 (((
236 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. 
237 )))
238
239 [[image:image-20220523172350-1.png||height="266" width="864"]]
240
241
242 (((
243 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:
244 )))
245
246 (((
247 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
248 )))
249
250 (((
251 Each LT is shipped with a sticker with the default device EUI as below:
252 )))
253
254 [[image:1653297924498-393.png]]
255
256
257 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
258
259 Add APP EUI in the application.
260
261 [[image:1653297955910-247.png||height="321" width="716"]]
262
263
264 Add APP KEY and DEV EUI
265
266 [[image:1653298023685-319.png]]
267
268
269 (((
270 (% style="color:blue" %)**Step 2**(%%): Power on LT and it will auto join to the TTN network. After join success, it will start to upload message to TTN and user can see in the panel.
271 )))
272
273 [[image:1653298044601-602.png||height="405" width="709"]]
274
275
276
277 == 3.3 Uplink Payload ==
278
279 There are five working modes + one interrupt mode on LT for different type application:
280
281 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
282 * **MOD2**: Double DI Counting + DO + RO
283 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
284 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
285 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
286 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
287
288 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
289
290 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
291
292 [[image:image-20220523174024-3.png]]
293
294 (((
295
296
297 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
298 )))
299
300 [[image:image-20220523174254-4.png]]
301
302 * RO is for relay. ROx=1 : close，ROx=0 always open.
303 * DI is for digital input. DIx=1: high or float, DIx=0: low.
304 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
305
306 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
307
308 For example if payload is: [[image:image-20220523175847-2.png]]
309
310
311 **The value for the interface is:  **
312
313 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
314
315 AVI2 channel voltage is 0x04AC/1000=1.196V
316
317 ACI1 channel current is 0x1310/1000=4.880mA
318
319 ACI2 channel current is 0x1300/1000=4.864mA
320
321 The last byte 0xAA= 10101010(B) means
322
323 * [1] RO1 relay channel is close and the RO1 LED is ON.
324 * [0] RO2 relay channel is open and RO2 LED is OFF;
325
326 **LT22222-L:**
327
328 * [1] DI2 channel is high input and DI2 LED is ON;
329 * [0] DI1 channel is low input;
330
331 * [0] DO3 channel output state
332 ** DO3 is float in case no load between DO3 and V+.;
333 ** DO3 is high in case there is load between DO3 and V+.
334 ** DO3 LED is off in both case
335 * [1] DO2 channel output is low and DO2 LED is ON.
336 * [0] DO1 channel output state
337 ** DO1 is float in case no load between DO1 and V+.;
338 ** DO1 is high in case there is load between DO1 and V+.
339 ** DO1 LED is off in both case
340
341 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
342
343
344 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
345
346 (((
347 Total : 11 bytes payload
348 )))
349
350 [[image:image-20220523180452-3.png]]
351
352
353 (((
354 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
355 )))
356
357 [[image:image-20220523180506-4.png]]
358
359 * RO is for relay. ROx=1 : close，ROx=0 always open.
360 * FIRST: Indicate this is the first packet after join network.
361 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
362
363 (((
364 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
365 )))
366
367 (((
368
369
370 **To use counting mode, please run:**
371 )))
372
373 (% class="box infomessage" %)
374 (((
375 (((
376 **AT+MOD=2**
377 )))
378 )))
379
380 (% class="box infomessage" %)
381 (((
382 (((
383 **ATZ**
384 )))
385 )))
386
387 (((
388
389
390 (% style="color:#4f81bd" %)**AT Commands for counting:**
391 )))
392
393 (((
394 **For LT22222-L:**
395 )))
396
397 (% class="box infomessage" %)
398 (((
399 (((
400 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
401 )))
402 )))
403
404 (% class="box infomessage" %)
405 (((
406 (((
407 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
408 )))
409 )))
410
411 (% class="box infomessage" %)
412 (((
413 (((
414 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
415 )))
416 )))
417
418 (% class="box infomessage" %)
419 (((
420 (((
421 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
422 )))
423 )))
424
425 (% class="box infomessage" %)
426 (((
427 (((
428 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
429 )))
430 )))
431
432 (% class="box infomessage" %)
433 (((
434 (((
435 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
436 )))
437 )))
438
439
440
441 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
442
443 **LT22222-L**: This mode the DI1 is used as a counting pin.
444
445 [[image:image-20220523181246-5.png]]
446
447 (((
448 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
449 )))
450
451 [[image:image-20220523181301-6.png]]
452
453 * RO is for relay. ROx=1 : close，ROx=0 always open.
454 * FIRST: Indicate this is the first packet after join network.
455 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
456
457 (((
458 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
459 )))
460
461 (((
462 **To use counting mode, please run:**
463 )))
464
465 (% class="box infomessage" %)
466 (((
467 (((
468 **AT+MOD=3**
469 )))
470 )))
471
472 (% class="box infomessage" %)
473 (((
474 (((
475 **ATZ**
476 )))
477 )))
478
479 (((
480 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
481 )))
482
483
484
485 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
486
487
488 **LT22222-L**: This mode the DI1 is used as a counting pin.
489
490 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.
491
492 [[image:image-20220523181903-8.png]]
493
494
495 (((
496 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
497 )))
498
499 [[image:image-20220523181727-7.png]]
500
501 * RO is for relay. ROx=1 : close，ROx=0 always open.
502 * FIRST: Indicate this is the first packet after join network.
503 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
504
505 (((
506 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
507 )))
508
509 (((
510
511
512 **To use this mode, please run:**
513 )))
514
515 (% class="box infomessage" %)
516 (((
517 (((
518 **AT+MOD=4**
519 )))
520 )))
521
522 (% class="box infomessage" %)
523 (((
524 (((
525 **ATZ**
526 )))
527 )))
528
529 (((
530
531 )))
532
533 (((
534 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
535 )))
536
537 (((
538
539
540 **Plus below command for AVI1 Counting:**
541 )))
542
543 (% class="box infomessage" %)
544 (((
545 (((
546 **AT+SETCNT=3,60   (set AVI Count to 60)**
547 )))
548 )))
549
550 (% class="box infomessage" %)
551 (((
552 (((
553 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
554 )))
555 )))
556
557 (% class="box infomessage" %)
558 (((
559 (((
560 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
561 )))
562 )))
563
564 (% class="box infomessage" %)
565 (((
566 (((
567 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
568 )))
569 )))
570
571
572
573 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
574
575
576 **LT22222-L**: This mode the DI1 is used as a counting pin.
577
578 [[image:image-20220523182334-9.png]]
579
580 (((
581
582
583 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
584 )))
585
586 * RO is for relay. ROx=1 : close，ROx=0 always open.
587 * FIRST: Indicate this is the first packet after join network.
588 * (((
589 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
590 )))
591
592 (((
593 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
594 )))
595
596 (((
597
598
599 **To use this mode, please run:**
600 )))
601
602 (% class="box infomessage" %)
603 (((
604 (((
605 **AT+MOD=5**
606 )))
607 )))
608
609 (% class="box infomessage" %)
610 (((
611 (((
612 **ATZ**
613 )))
614 )))
615
616 (((
617 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
618 )))
619
620
621
622 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
623
624
625 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
626
627 For example, if user has configured below commands:
628
629 * **AT+MOD=1 ** **~-~->** The normal working mode
630 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
631
632 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
633
634 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
635 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.**
636
637 **AT Command to set Trigger Condition**:
638
639 (% style="color:#4f81bd" %)**Trigger base on voltage**:
640
641 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
642
643 **Example:**
644
645 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)
646
647 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
648
649
650
651 (% style="color:#4f81bd" %)**Trigger base on current**:
652
653 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
654
655 **Example:**
656
657 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
658
659
660
661 (% style="color:#4f81bd" %)**Trigger base on DI status**:
662
663 DI status trigger Flag.
664
665 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
666
667
668 **Example:**
669
670 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
671
672
673 **Downlink Command to set Trigger Condition:**
674
675 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
676
677 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
678
679 AA: Code for this downlink Command:
680
681 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
682
683 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
684
685 yy2 yy2: AC1 or AV1 high limit.
686
687 yy3 yy3: AC2 or AV2 low limit.
688
689 Yy4 yy4: AC2 or AV2 high limit.
690
691
692 **Example1**: AA 00 13 88 00 00 00 00 00 00
693
694 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
695
696
697 **Example2**: AA 02 01 00
698
699 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
700
701
702
703 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
704
705 MOD6 Payload : total 11 bytes payload
706
707 [[image:image-20220524085923-1.png]]
708
709
710 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
711
712 [[image:image-20220524090106-2.png]]
713
714 * Each bits shows if the corresponding trigger has been configured.
715
716 **Example:**
717
718 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
719
720
721 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
722
723 [[image:image-20220524090249-3.png]]
724
725 * Each bits shows which status has been trigger on this uplink.
726
727 **Example:**
728
729 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
730
731
732 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
733
734 [[image:image-20220524090456-4.png]]
735
736 * Each bits shows which status has been trigger on this uplink.
737
738 **Example:**
739
740 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
741
742 00000101: Means both DI1 and DI2 trigger are enabled.
743
744
745 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
746
747 Downlink command to poll MOD6 status:
748
749 **AB 06**
750
751 When device got this command, it will send the MOD6 payload.
752
753
754
755 === 3.3.7 Payload Decoder ===
756
757 (((
758
759
760 **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/]]
761
762
763 )))
764
765
766 == 3.4 ​Configure LT via AT or Downlink ==
767
768 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
769
770 (((
771 There are two kinds of Commands:
772 )))
773
774 * (% 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]]
775
776 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
777
778 === 3.4.1 Common Commands ===
779
780 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]]
781
782
783
784 === 3.4.2 Sensor related commands ===
785
786 ==== 3.4.2.1 Set Transmit Interval ====
787
788 Set device uplink interval.
789
790 * AT Command:
791
792 (% class="box infomessage" %)
793 (((
794 **AT+TDC=N **
795 )))
796
797 **Example: **AT+TDC=30000. Means set interval to 30 seconds
798
799
800 * Downlink Payload (prefix 0x01):
801
802 (% class="box infomessage" %)
803 (((
804 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
805 )))
806
807
808
809 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
810
811 Set work mode.
812
813 * AT Command:
814
815 (% class="box infomessage" %)
816 (((
817 **AT+MOD=N  **
818 )))
819
820 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
821
822
823 * Downlink Payload (prefix 0x0A):
824
825 (% class="box infomessage" %)
826 (((
827 **0x0A aa     ~/~/ Same as AT+MOD=aa**
828 )))
829
830
831
832 ==== 3.4.2.3 Poll an uplink ====
833
834 * AT Command:
835
836 There is no AT Command to poll uplink
837
838
839 * Downlink Payload (prefix 0x08):
840
841 (% class="box infomessage" %)
842 (((
843 **0x08 FF     ~/~/ Poll an uplink,**
844 )))
845
846 **Example**: 0x08FF, ask device to send an Uplink
847
848
849
850 ==== 3.4.2.4 Enable Trigger Mode ====
851
852 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
853
854 * AT Command:
855
856 (% class="box infomessage" %)
857 (((
858 **AT+ADDMOD6=1 or 0**
859 )))
860
861 1: Enable Trigger Mode
862
863 0: Disable Trigger Mode
864
865
866 * Downlink Payload (prefix 0x0A 06):
867
868 (% class="box infomessage" %)
869 (((
870 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
871 )))
872
873
874
875 ==== 3.4.2.5 Poll trigger settings ====
876
877 Poll trigger settings,
878
879 * AT Command:
880
881 There is no AT Command for this feature.
882
883
884 * Downlink Payload (prefix 0x AB 06):
885
886 (% class="box infomessage" %)
887 (((
888 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
889 )))
890
891
892
893 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
894
895 Enable Disable DI1/DI2/DI2 as trigger,
896
897 * AT Command:
898
899 (% class="box infomessage" %)
900 (((
901 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
902 )))
903
904
905 **Example:**
906
907 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
908
909 * Downlink Payload (prefix 0xAA 02):
910
911 (% class="box infomessage" %)
912 (((
913 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
914 )))
915
916
917
918 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
919
920 Set DI1 or DI3(for LT-33222-L) trigger.
921
922 * AT Command:
923
924 (% class="box infomessage" %)
925 (((
926 **AT+TRIG1=a,b**
927 )))
928
929 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
930
931 b : delay timing.
932
933
934 **Example:**
935
936 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
937
938
939 * Downlink Payload (prefix 0x09 01 ):
940
941 (% class="box infomessage" %)
942 (((
943 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
944 )))
945
946
947
948 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
949
950 Set DI2 trigger.
951
952 * AT Command:
953
954 (% class="box infomessage" %)
955 (((
956 **AT+TRIG2=a,b**
957 )))
958
959 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
960
961 b : delay timing.
962
963
964 **Example:**
965
966 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
967
968
969 * Downlink Payload (prefix 0x09 02 ):
970
971 (% class="box infomessage" %)
972 (((
973 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
974 )))
975
976
977
978 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
979
980 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
981
982 * AT Command:
983
984 (% class="box infomessage" %)
985 (((
986 **AT+ACLIM. **
987 )))
988
989
990 * Downlink Payload (prefix 0xAA 01 ):
991
992 (% class="box infomessage" %)
993 (((
994 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
995 )))
996
997
998
999 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
1000
1001 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
1002
1003 * AT Command:
1004
1005 (% class="box infomessage" %)
1006 (((
1007 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1008 )))
1009
1010
1011 * Downlink Payload (prefix 0xAA 00 ):
1012
1013 (% class="box infomessage" %)
1014 (((
1015 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
1016 )))
1017
1018
1019
1020 ==== 3.4.2.11 Trigger – Set minimum interval ====
1021
1022 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
1023
1024 * AT Command:
1025
1026 (% class="box infomessage" %)
1027 (((
1028 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1029 )))
1030
1031
1032 * Downlink Payload (prefix 0xAC ):
1033
1034 (% class="box infomessage" %)
1035 (((
1036 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1037 )))
1038
1039
1040
1041 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1042
1043 * AT Command:
1044
1045 There is no AT Command to control Digital Output
1046
1047
1048 * Downlink Payload (prefix 0x02):
1049
1050 (% class="box infomessage" %)
1051 (((
1052 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1053 )))
1054
1055 (((
1056 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1057 )))
1058
1059 (((
1060 01: Low,  00: High ,  11: No action
1061 )))
1062
1063 [[image:image-20220524092754-5.png]]
1064
1065 (((
1066 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1067 )))
1068
1069 (((
1070 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1071 )))
1072
1073
1074
1075 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1076
1077 * AT Command:
1078
1079 There is no AT Command to control Digital Output
1080
1081
1082 * Downlink Payload (prefix 0xA9):
1083
1084 (% class="box infomessage" %)
1085 (((
1086 (((
1087 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1088 )))
1089 )))
1090
1091 This is to control the digital output time of DO pin. Include four bytes:
1092
1093 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1094
1095 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1096
1097 01: DO pins will change back to original state after timeout.
1098
1099 00: DO pins will change to an inverter state after timeout 
1100
1101
1102 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1103
1104 [[image:image-20220524093238-6.png]]
1105
1106
1107 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1108
1109 [[image:image-20220524093328-7.png]]
1110
1111
1112 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1113
1114 [[image:image-20220524093351-8.png]]
1115
1116
1117 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1118
1119 Latching time. Unit: ms
1120
1121 Device will upload a packet if downlink code executes successfully.
1122
1123
1124 **Example payload:**
1125
1126 **~1. A9 01 01 01 01 07 D0**
1127
1128 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1129
1130 **2. A9 01 00 01 11 07 D0**
1131
1132 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1133
1134 **3. A9 00 00 00 00 07 D0**
1135
1136 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1137
1138 **4. A9 00 11 01 00 07 D0**
1139
1140 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
1141
1142
1143
1144 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1145
1146 * AT Command:
1147
1148 There is no AT Command to control Relay Output
1149
1150
1151 * Downlink Payload (prefix 0x03):
1152
1153 (% class="box infomessage" %)
1154 (((
1155 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1156 )))
1157
1158 (((
1159 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1160 )))
1161
1162 (((
1163 01: Close ,  00: Open , 11: No action
1164 )))
1165
1166 (((
1167 [[image:image-20220524093724-9.png]]
1168 )))
1169
1170 Device will upload a packet if downlink code executes successfully.
1171
1172
1173
1174 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1175
1176 * AT Command:
1177
1178 There is no AT Command to control Relay Output
1179
1180
1181 * Downlink Payload (prefix 0x05):
1182
1183 (% class="box infomessage" %)
1184 (((
1185 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1186 )))
1187
1188 This is to control the relay output time of relay. Include four bytes:
1189
1190 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1191
1192 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1193
1194 01: Relays will change back to original state after timeout.
1195
1196 00: Relays will change to an inverter state after timeout
1197
1198
1199 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1200
1201 [[image:image-20220524093831-10.png]]
1202
1203
1204 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1205
1206 Device will upload a packet if downlink code executes successfully.
1207
1208
1209 **Example payload:**
1210
1211 **~1. 05 01 11 07 D0**
1212
1213 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1214
1215 **2. 05 01 10 07 D0**
1216
1217 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1218
1219 **3. 05 00 01 07 D0**
1220
1221 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1222
1223 **4. 05 00 00 07 D0**
1224
1225 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1226
1227
1228
1229 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1230
1231 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1232
1233 * AT Command:
1234
1235 (% class="box infomessage" %)
1236 (((
1237 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1238 )))
1239
1240
1241 * Downlink Payload (prefix 0xA5):
1242
1243 (% class="box infomessage" %)
1244 (((
1245 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1246 )))
1247
1248
1249
1250 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1251
1252 * AT Command:
1253
1254 (% class="box infomessage" %)
1255 (((
1256 **AT+SETCNT=aa,(bb cc dd ee) **
1257 )))
1258
1259 aa: 1: Set count1,
1260
1261 2: Set count2,
1262
1263 3: Set AV1 count
1264
1265 Bb cc dd ee: number to be set
1266
1267
1268 * Downlink Payload (prefix 0xA8):
1269
1270 (% class="box infomessage" %)
1271 (((
1272 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1273 )))
1274
1275
1276
1277 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1278
1279 Clear counting for counting mode
1280
1281 * AT Command:
1282
1283 (% class="box infomessage" %)
1284 (((
1285 **AT+CLRCOUNT ~/~/ clear all counting**
1286 )))
1287
1288 * Downlink Payload (prefix 0xA6):
1289
1290 (% class="box infomessage" %)
1291 (((
1292 **0x A6 01     ~/~/ clear all counting,**
1293 )))
1294
1295
1296
1297 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1298
1299 * AT Command:
1300
1301 (% class="box infomessage" %)
1302 (((
1303 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1304 )))
1305
1306 * Downlink Payload (prefix 0xA7):
1307
1308 (% class="box infomessage" %)
1309 (((
1310 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1311 )))
1312
1313 (((
1314 range: aa bb cc:0 to 16777215,  (unit:second)
1315
1316
1317 )))
1318
1319
1320 == 3.5 Integrate with Mydevice ==
1321
1322 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:
1323
1324 (((
1325 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1326 )))
1327
1328 (((
1329 (% style="color:blue" %)**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:
1330 )))
1331
1332 [[image:1653356737703-362.png||height="232" width="732"]]
1333
1334 [[image:image-20220524094641-11.png||height="390" width="723"]]
1335
1336
1337 [[image:image-20220524094641-12.png||height="402" width="718"]]
1338
1339
1340 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1341
1342 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1343
1344 Search under The things network
1345
1346 [[image:1653356838789-523.png||height="337" width="740"]]
1347
1348
1349
1350 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1351
1352 [[image:image-20220524094909-1.png||height="335" width="729"]]
1353
1354
1355 [[image:image-20220524094909-2.png||height="337" width="729"]]
1356
1357
1358 [[image:image-20220524094909-3.png||height="338" width="727"]]
1359
1360
1361 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1362
1363
1364 [[image:image-20220524094909-5.png||height="341" width="734"]]
1365
1366
1367
1368 == 3.6 Interface Detail ==
1369
1370 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1371
1372 Support NPN Type sensor
1373
1374 [[image:1653356991268-289.png]]
1375
1376
1377
1378 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1379
1380 (((
1381 The DI port of LT-22222-L can support NPN or PNP output sensor.
1382 )))
1383
1384 (((
1385 (((
1386 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
1387 )))
1388 )))
1389
1390 [[image:1653357170703-587.png]]
1391
1392 (((
1393 (((
1394 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1395 )))
1396 )))
1397
1398 (((
1399
1400 )))
1401
1402 (((
1403 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1404 )))
1405
1406 (((
1407 This type of sensor will output a low signal GND when active.
1408 )))
1409
1410 * (((
1411 Connect sensor’s output to DI1-
1412 )))
1413 * (((
1414 Connect sensor’s VCC to DI1+.
1415 )))
1416
1417 (((
1418 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1419 )))
1420
1421 (((
1422 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1423 )))
1424
1425 (((
1426 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.
1427 )))
1428
1429 (((
1430
1431 )))
1432
1433 (((
1434 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1435 )))
1436
1437 (((
1438 This type of sensor will output a high signal (example 24v) when active.
1439 )))
1440
1441 * (((
1442 Connect sensor’s output to DI1+
1443 )))
1444 * (((
1445 Connect sensor’s GND DI1-.
1446 )))
1447
1448 (((
1449 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1450 )))
1451
1452 (((
1453 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1454 )))
1455
1456 (((
1457 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.
1458 )))
1459
1460 (((
1461
1462 )))
1463
1464 (((
1465 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1466 )))
1467
1468 (((
1469 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1470 )))
1471
1472 * (((
1473 Connect sensor’s output to DI1+ with a serial 50K resistor
1474 )))
1475 * (((
1476 Connect sensor’s GND DI1-.
1477 )))
1478
1479 (((
1480 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1481 )))
1482
1483 (((
1484 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1485 )))
1486
1487 (((
1488 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.
1489 )))
1490
1491
1492
1493 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1494
1495 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1496
1497 [[image:1653357531600-905.png]]
1498
1499
1500
1501 === 3.6.4 Analog Input Interface ===
1502
1503 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:
1504
1505
1506 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1507
1508 [[image:1653357592296-182.png]]
1509
1510 Example to connect a 4~~20mA sensor
1511
1512 We take the wind speed sensor as an example for reference only.
1513
1514
1515 **Specifications of the wind speed sensor:**
1516
1517 Red:  12~~24v
1518
1519 Yellow:  4~~20mA
1520
1521 Black:  GND
1522
1523
1524 **Connection diagram:**
1525
1526 [[image:1653357640609-758.png]]
1527
1528 [[image:1653357648330-671.png||height="155" width="733"]]
1529
1530
1531
1532 === 3.6.5 Relay Output ===
1533
1534 (((
1535 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:
1536 )))
1537
1538 [[image:image-20220524100215-9.png]]
1539
1540 [[image:image-20220524100215-10.png||height="382" width="723"]]
1541
1542
1543
1544 == 3.7 LEDs Indicators ==
1545
1546 [[image:image-20220524100748-11.png]]
1547
1548
1549 = 4. Use AT Command =
1550
1551 == 4.1 Access AT Command ==
1552
1553 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.
1554
1555 [[image:1653358238933-385.png]]
1556
1557
1558 (((
1559 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:
1560 )))
1561
1562 [[image:1653358355238-883.png]]
1563
1564
1565 (((
1566 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/]]
1567 )))
1568
1569 (((
1570 AT+<CMD>?        : Help on <CMD>
1571 )))
1572
1573 (((
1574 AT+<CMD>         : Run <CMD>
1575 )))
1576
1577 (((
1578 AT+<CMD>=<value> : Set the value
1579 )))
1580
1581 (((
1582 AT+<CMD>=?       : Get the value
1583 )))
1584
1585 (((
1586 ATZ: Trig a reset of the MCU
1587 )))
1588
1589 (((
1590 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1591 )))
1592
1593 (((
1594 AT+DEUI: Get or Set the Device EUI
1595 )))
1596
1597 (((
1598 AT+DADDR: Get or Set the Device Address
1599 )))
1600
1601 (((
1602 AT+APPKEY: Get or Set the Application Key
1603 )))
1604
1605 (((
1606 AT+NWKSKEY: Get or Set the Network Session Key
1607 )))
1608
1609 (((
1610 AT+APPSKEY: Get or Set the Application Session Key
1611 )))
1612
1613 (((
1614 AT+APPEUI: Get or Set the Application EUI
1615 )))
1616
1617 (((
1618 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1619 )))
1620
1621 (((
1622 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1623 )))
1624
1625 (((
1626 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1627 )))
1628
1629 (((
1630 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1631 )))
1632
1633 (((
1634 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1635 )))
1636
1637 (((
1638 AT+RX2FQ: Get or Set the Rx2 window frequency
1639 )))
1640
1641 (((
1642 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1643 )))
1644
1645 (((
1646 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1647 )))
1648
1649 (((
1650 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1651 )))
1652
1653 (((
1654 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1655 )))
1656
1657 (((
1658 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1659 )))
1660
1661 (((
1662 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1663 )))
1664
1665 (((
1666 AT+NWKID: Get or Set the Network ID
1667 )))
1668
1669 (((
1670 AT+FCU: Get or Set the Frame Counter Uplink
1671 )))
1672
1673 (((
1674 AT+FCD: Get or Set the Frame Counter Downlink
1675 )))
1676
1677 (((
1678 AT+CLASS: Get or Set the Device Class
1679 )))
1680
1681 (((
1682 AT+JOIN: Join network
1683 )))
1684
1685 (((
1686 AT+NJS: Get OTAA Join Status
1687 )))
1688
1689 (((
1690 AT+SENDB: Send hexadecimal data along with the application port
1691 )))
1692
1693 (((
1694 AT+SEND: Send text data along with the application port
1695 )))
1696
1697 (((
1698 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1699 )))
1700
1701 (((
1702 AT+RECV: Print last received data in raw format
1703 )))
1704
1705 (((
1706 AT+VER: Get current image version and Frequency Band
1707 )))
1708
1709 (((
1710 AT+CFM: Get or Set the confirmation mode (0-1)
1711 )))
1712
1713 (((
1714 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1715 )))
1716
1717 (((
1718 AT+SNR: Get the SNR of the last received packet
1719 )))
1720
1721 (((
1722 AT+RSSI: Get the RSSI of the last received packet
1723 )))
1724
1725 (((
1726 AT+TDC: Get or set the application data transmission interval in ms
1727 )))
1728
1729 (((
1730 AT+PORT: Get or set the application port
1731 )))
1732
1733 (((
1734 AT+DISAT: Disable AT commands
1735 )))
1736
1737 (((
1738 AT+PWORD: Set password, max 9 digits
1739 )))
1740
1741 (((
1742 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1743 )))
1744
1745 (((
1746 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1747 )))
1748
1749 (((
1750 AT+CFG: Print all settings
1751
1752
1753 )))
1754
1755
1756
1757 == 4.2 Common AT Command Sequence ==
1758
1759 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1760
1761 (((
1762
1763
1764 **If device has not joined network yet:**
1765 )))
1766
1767 (((
1768 (% style="background-color:#dcdcdc" %)123456
1769 )))
1770
1771 (((
1772 (% style="background-color:#dcdcdc" %)AT+FDR
1773 )))
1774
1775 (((
1776 (% style="background-color:#dcdcdc" %)123456
1777 )))
1778
1779 (((
1780 (% style="background-color:#dcdcdc" %)AT+NJM=0
1781 )))
1782
1783 (((
1784 (% style="background-color:#dcdcdc" %)ATZ
1785 )))
1786
1787
1788 (((
1789 **If device already joined network:**
1790 )))
1791
1792 (((
1793 (% style="background-color:#dcdcdc" %)AT+NJM=0
1794 )))
1795
1796 (((
1797 (% style="background-color:#dcdcdc" %)ATZ
1798
1799
1800 )))
1801
1802
1803
1804 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1805
1806 (((
1807
1808
1809 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1810 )))
1811
1812 (((
1813 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1814 )))
1815
1816 (((
1817 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1818 )))
1819
1820 (((
1821 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1822 )))
1823
1824 (((
1825 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1826 )))
1827
1828 (((
1829 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1830 )))
1831
1832 (((
1833 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1834 )))
1835
1836 (((
1837 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1838 )))
1839
1840 (((
1841 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1842 )))
1843
1844 (((
1845 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1846 )))
1847
1848 (((
1849 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1850 )))
1851
1852 (((
1853 (% 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.
1854 )))
1855
1856 (((
1857 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1858
1859
1860 )))
1861
1862 (((
1863 (% style="color:red" %)**Note:**
1864 )))
1865
1866 (((
1867 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1868 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1869 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.
1870 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
1871 )))
1872
1873 (((
1874 [[image:1653359097980-169.png||height="188" width="729"]]
1875 )))
1876
1877 (((
1878
1879 )))
1880
1881
1882 === 4.2.3 Change to Class A ===
1883
1884 If sensor JOINED
1885 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1886 ATZ
1887
1888
1889 = 5. FAQ =
1890
1891 == 5.1 How to upgrade the image? ==
1892
1893
1894 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1895
1896 * Support new features
1897 * For bug fix
1898 * Change LoRaWAN bands.
1899
1900 Below shows the hardware connection for how to upload an image to the LT:
1901
1902 [[image:1653359603330-121.png]]
1903
1904
1905 (((
1906 (% style="color:blue" %)**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]].
1907 (% style="color:blue" %)**Step2**(%%)**:** Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1908 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1909
1910
1911 (% style="color:blue" %)**For LT-22222-L**(%%):
1912 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.
1913 )))
1914
1915 [[image:image-20220524103407-12.png]]
1916
1917 [[image:image-20220524103429-13.png]]
1918
1919 [[image:image-20220524104033-15.png]]
1920
1921
1922 (% 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:
1923
1924 [[image:1653360054704-518.png||height="186" width="745"]]
1925
1926
1927 (((
1928 (((
1929
1930
1931 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1932 )))
1933 )))
1934
1935 (((
1936 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1937 )))
1938
1939 (((
1940
1941
1942 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1943 )))
1944
1945 (((
1946 (((
1947 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1948 )))
1949 )))
1950
1951 (((
1952 (((
1953 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1954
1955
1956 )))
1957 )))
1958
1959 (((
1960 (% 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.
1961 )))
1962
1963 (((
1964 [[image:1653360231087-571.png||height="401" width="727"]]
1965 )))
1966
1967 (((
1968 (% 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.
1969 )))
1970
1971
1972 (((
1973 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1974 )))
1975
1976 (((
1977 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1978 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1979 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1980 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1981 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1982 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1983 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1984 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1985 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1986 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1987 )))
1988
1989
1990 (((
1991 As shown in below:
1992 )))
1993
1994 [[image:1653360498588-932.png||height="485" width="726"]]
1995
1996
1997 == 5.4 Can I see counting event in Serial? ==
1998
1999 (((
2000 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.
2001
2002
2003 == 5.5 Can i use point to point communication for LT-22222-L? ==
2004
2005 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
2006 )))
2007
2008 (((
2009
2010
2011 = 6. Trouble Shooting =
2012 )))
2013
2014 (((
2015 (((
2016 == 6.1 Downlink doesn’t work, how to solve it? ==
2017 )))
2018 )))
2019
2020 (((
2021 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2022 )))
2023
2024 (((
2025
2026
2027 == 6.2 Have trouble to upload image. ==
2028 )))
2029
2030 (((
2031 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2032 )))
2033
2034 (((
2035
2036
2037 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2038 )))
2039
2040 (((
2041 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2042 )))
2043
2044
2045
2046 = 7. Order Info =
2047
2048
2049 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2050
2051
2052 (% style="color:#4f81bd" %)**XXX:**
2053
2054 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2055 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2056 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2057 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2058 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2059 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2060 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2061 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2062 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2063
2064 = 8. Packing Info =
2065
2066
2067 **Package Includes**:
2068
2069 * LT-22222-L I/O Controller x 1
2070 * Stick Antenna for LoRa RF part x 1
2071 * Bracket for controller x1
2072 * Program cable x 1
2073
2074 **Dimension and weight**:
2075
2076 * Device Size: 13.5 x 7 x 3 cm
2077 * Device Weight: 105g
2078 * Package Size / pcs : 14.5 x 8 x 5 cm
2079 * Weight / pcs : 170g
2080
2081 = 9. Support =
2082
2083 * (((
2084 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.
2085 )))
2086 * (((
2087 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 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2088 )))
2089
2090 = 10. Reference​​​​​ =
2091
2092 * 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]]
2093 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2094 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2095 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]

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