Version 77.16 by Xiaoling on 2022/06/10 08:40
Show last authors
1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
3
4 **LT-22222-L LoRa IO Controller User Manual **
5
6
7 **Table of Contents:**
8
9 {{toc/}}
10
11
12
13
14
15
16
17 = 1.Introduction =
18
19 == 1.1 What is LT Series I/O Controller ==
20
21 (((
22 The Dragino (% style="color:blue" %)**LT series I/O Modules**(%%) are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as:** (% style="color:blue" %)analog current Input, analog voltage input(%%)**(% style="color:blue" %), **relay output**, **digital input**(%%) and (% style="color:blue" %)**digital output**(%%) etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
23 )))
24
25 (((
26 The LT I/O Controllers allows the user to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.
27 )))
28
29 (((
30 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
31 )))
32
33 (((
34 The use environment includes:
35 )))
36
37 (((
38 1) If user’s area has LoRaWAN service coverage, they can just install the I/O controller and configure it to connect the LoRaWAN provider via wireless.
39 )))
40
41 (((
42 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
43 )))
44
45 (((
46 [[image:1653295757274-912.png]]
47
48
49 )))
50
51 == 1.2  Specifications ==
52
53 (((
54
55
56 **Hardware System:**
57 )))
58
59 * (((
60 STM32L072CZT6 MCU
61 )))
62 * (((
63 SX1276/78 Wireless Chip 
64 )))
65 * (((
66 (((
67 Power Consumption:
68 )))
69
70 * (((
71 Idle: 4mA@12v
72 )))
73 * (((
74 20dB Transmit: 34mA@12v
75 )))
76 )))
77
78
79 (((
80 **Interface for Model: LT22222-L:**
81 )))
82
83 * (((
84 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
85 )))
86 * (((
87 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
88 )))
89 * (((
90 2 x Relay Output (5A@250VAC / 30VDC)
91 )))
92 * (((
93 2 x 0~~20mA Analog Input (res:0.01mA)
94 )))
95 * (((
96 2 x 0~~30V Analog Input (res:0.01v)
97 )))
98 * (((
99 Power Input 7~~ 24V DC. 
100 )))
101
102
103 (((
104 **LoRa Spec:**
105 )))
106
107 * (((
108 (((
109 Frequency Range:
110 )))
111
112 * (((
113 Band 1 (HF): 862 ~~ 1020 Mhz
114 )))
115 * (((
116 Band 2 (LF): 410 ~~ 528 Mhz
117 )))
118 )))
119 * (((
120 168 dB maximum link budget.
121 )))
122 * (((
123 +20 dBm - 100 mW constant RF output vs.
124 )))
125 * (((
126 +14 dBm high efficiency PA.
127 )))
128 * (((
129 Programmable bit rate up to 300 kbps.
130 )))
131 * (((
132 High sensitivity: down to -148 dBm.
133 )))
134 * (((
135 Bullet-proof front end: IIP3 = -12.5 dBm.
136 )))
137 * (((
138 Excellent blocking immunity.
139 )))
140 * (((
141 Low RX current of 10.3 mA, 200 nA register retention.
142 )))
143 * (((
144 Fully integrated synthesizer with a resolution of 61 Hz.
145 )))
146 * (((
147 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
148 )))
149 * (((
150 Built-in bit synchronizer for clock recovery.
151 )))
152 * (((
153 Preamble detection.
154 )))
155 * (((
156 127 dB Dynamic Range RSSI.
157 )))
158 * (((
159 Automatic RF Sense and CAD with ultra-fast AFC.
160 )))
161 * (((
162 Packet engine up to 256 bytes with CRC.
163
164
165 )))
166
167
168
169 == 1.3 Features ==
170
171 * LoRaWAN Class A & Class C protocol
172 * Optional Customized LoRa Protocol
173 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
174 * AT Commands to change parameters
175 * Remote configure parameters via LoRa Downlink
176 * Firmware upgradable via program port
177 * Counting
178
179
180
181 == 1.4  Applications ==
182
183 * Smart Buildings & Home Automation
184 * Logistics and Supply Chain Management
185 * Smart Metering
186 * Smart Agriculture
187 * Smart Cities
188 * Smart Factory
189
190
191
192 == 1.5 Hardware Variants ==
193
194 (% border="1" style="background-color:#f7faff; width:500px" %)
195 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
196 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
197 * 2 x Digital Input (Bi-direction)
198 * 2 x Digital Output
199 * 2 x Relay Output (5A@250VAC / 30VDC)
200 * 2 x 0~~20mA Analog Input (res:0.01mA)
201 * 2 x 0~~30V Analog Input (res:0.01v)
202 * 1 x Counting Port
203 )))
204
205
206
207 = 2. Power ON Device =
208
209 The LT controller can be powered by 7 ~~ 24V DC power source. Connect VIN to Power Input V+ and GND to power input V- to power the LT controller.
210
211 (((
212 PWR will on when device is properly powered.
213 )))
214
215 [[image:1653297104069-180.png]]
216
217
218
219 = 3. Operation Mode =
220
221 == 3.1 How it works? ==
222
223 (((
224 The LT is configured as LoRaWAN OTAA Class C mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and power on the LT. It will auto join the network via OTAA. For LT-22222-L, the LED will show the Join status: After power on **TX LED** will fast blink 5 times, LT-22222-L will enter working mode and start to JOIN LoRaWAN network. **TX LED** will be on for 5 seconds after joined in network. When there is message from server, the **RX LED** will be on for 1 second. 
225 )))
226
227 (((
228 In case user can’t set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>||anchor="H4.UseATCommand"]] to set the keys in the devices.
229
230
231 )))
232
233
234
235 == 3.2 Example to join LoRaWAN network ==
236
237 (((
238 This chapter shows an example for how to join the TTN LoRaWAN Network. Below is the network structure, we use our LG308 as LoRaWAN gateway here. 
239 )))
240
241 [[image:image-20220523172350-1.png||height="266" width="864"]]
242
243 (((
244 The LG308 is already set to connect to [[TTN network >>url:https://www.thethingsnetwork.org/]]. So what we need to do now is only configure register this device to TTN:
245 )))
246
247 (((
248 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
249 )))
250
251 (((
252 Each LT is shipped with a sticker with the default device EUI as below:
253 )))
254
255 [[image:1653297924498-393.png]]
256
257 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
258
259 Add APP EUI in the application.
260
261 [[image:1653297955910-247.png||height="321" width="716"]]
262
263
264 Add APP KEY and DEV EUI
265
266 [[image:1653298023685-319.png]]
267
268
269 (((
270 **Step 2**: Power on LT and it will auto join to the TTN network. After join success, it will start to upload message to TTN and user can see in the panel.
271 )))
272
273 [[image:1653298044601-602.png||height="405" width="709"]]
274
275
276
277 == 3.3 Uplink Payload ==
278
279 There are five working modes + one interrupt mode on LT for different type application:
280
281 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
282 * **MOD2**: Double DI Counting + DO + RO
283 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
284 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
285 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
286 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
287
288
289
290 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
291
292 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
293
294 [[image:image-20220523174024-3.png]]
295
296 (((
297 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
298 )))
299
300 [[image:image-20220523174254-4.png]]
301
302 * RO is for relay. ROx=1 : close，ROx=0 always open.
303 * DI is for digital input. DIx=1: high or float, DIx=0: low.
304 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
305
306 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
307
308 For example if payload is: [[image:image-20220523175847-2.png]]
309
310 **The value for the interface is:  **
311
312 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
313
314 AVI2 channel voltage is 0x04AC/1000=1.196V
315
316 ACI1 channel current is 0x1310/1000=4.880mA
317
318 ACI2 channel current is 0x1300/1000=4.864mA
319
320 The last byte 0xAA= 10101010(B) means
321
322 * [1] RO1 relay channel is close and the RO1 LED is ON.
323 * [0] RO2 relay channel is open and RO2 LED is OFF;
324
325
326 **LT22222-L:**
327
328 * [1] DI2 channel is high input and DI2 LED is ON;
329 * [0] DI1 channel is low input;
330
331 * [0] DO3 channel output state
332 ** DO3 is float in case no load between DO3 and V+.;
333 ** DO3 is high in case there is load between DO3 and V+.
334 ** DO3 LED is off in both case
335 * [1] DO2 channel output is low and DO2 LED is ON.
336 * [0] DO1 channel output state
337 ** DO1 is float in case no load between DO1 and V+.;
338 ** DO1 is high in case there is load between DO1 and V+.
339 ** DO1 LED is off in both case
340
341
342
343 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
344
345 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
346
347 (((
348 Total : 11 bytes payload
349 )))
350
351 [[image:image-20220523180452-3.png]]
352
353 (((
354 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
355 )))
356
357 [[image:image-20220523180506-4.png]]
358
359 * RO is for relay. ROx=1 : close，ROx=0 always open.
360 * FIRST: Indicate this is the first packet after join network.
361 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
362
363 (((
364 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
365 )))
366
367 (((
368 **To use counting mode, please run:**
369 )))
370
371 (% class="box infomessage" %)
372 (((
373 (((
374 **AT+MOD=2**
375 )))
376 )))
377
378 (% class="box infomessage" %)
379 (((
380 (((
381 **ATZ**
382 )))
383 )))
384
385 (((
386 (% style="color:#4f81bd" %)**AT Commands for counting:**
387 )))
388
389 (((
390 **For LT22222-L:**
391 )))
392
393 (% class="box infomessage" %)
394 (((
395 (((
396 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
397 )))
398 )))
399
400 (% class="box infomessage" %)
401 (((
402 (((
403 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
404 )))
405 )))
406
407 (% class="box infomessage" %)
408 (((
409 (((
410 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
411 )))
412 )))
413
414 (% class="box infomessage" %)
415 (((
416 (((
417 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
418 )))
419 )))
420
421 (% class="box infomessage" %)
422 (((
423 (((
424 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
425 )))
426 )))
427
428 (% class="box infomessage" %)
429 (((
430 (((
431 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
432 )))
433 )))
434
435
436
437 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
438
439 **LT22222-L**: This mode the DI1 is used as a counting pin.
440
441 [[image:image-20220523181246-5.png]]
442
443 (((
444 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
445 )))
446
447 [[image:image-20220523181301-6.png]]
448
449 * RO is for relay. ROx=1 : close，ROx=0 always open.
450 * FIRST: Indicate this is the first packet after join network.
451 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
452
453 (((
454 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
455 )))
456
457 (((
458 **To use counting mode, please run:**
459 )))
460
461 (% class="box infomessage" %)
462 (((
463 (((
464 **AT+MOD=3**
465 )))
466 )))
467
468 (% class="box infomessage" %)
469 (((
470 (((
471 **ATZ**
472 )))
473 )))
474
475 (((
476 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
477
478
479 )))
480
481
482
483 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
484
485 **LT22222-L**: This mode the DI1 is used as a counting pin.
486
487 The AVI1 is also used for counting. AVI1 is used to monitor the voltage. It will check the voltage **every 60s**, if voltage is higher or lower than VOLMAX mV, the AVI1 Counting increase 1, so AVI1 counting can be used to measure a machine working hour.
488
489 [[image:image-20220523181903-8.png]]
490
491 (((
492 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
493 )))
494
495 [[image:image-20220523181727-7.png]]
496
497 * RO is for relay. ROx=1 : close，ROx=0 always open.
498 * FIRST: Indicate this is the first packet after join network.
499 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
500
501 (((
502 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
503 )))
504
505 (((
506 **To use this mode, please run:**
507 )))
508
509 (% class="box infomessage" %)
510 (((
511 (((
512 **AT+MOD=4**
513 )))
514 )))
515
516 (% class="box infomessage" %)
517 (((
518 (((
519 **ATZ**
520 )))
521 )))
522
523 (((
524
525 )))
526
527 (((
528 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
529 )))
530
531 (((
532 **Plus below command for AVI1 Counting:**
533 )))
534
535 (% class="box infomessage" %)
536 (((
537 (((
538 **AT+SETCNT=3,60   (set AVI Count to 60)**
539 )))
540 )))
541
542 (% class="box infomessage" %)
543 (((
544 (((
545 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
546 )))
547 )))
548
549 (% class="box infomessage" %)
550 (((
551 (((
552 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
553 )))
554 )))
555
556 (% class="box infomessage" %)
557 (((
558 (((
559 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
560 )))
561 )))
562
563
564
565 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
566
567 **LT22222-L**: This mode the DI1 is used as a counting pin.
568
569 [[image:image-20220523182334-9.png]]
570
571 (((
572 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
573 )))
574
575 * RO is for relay. ROx=1 : close，ROx=0 always open.
576 * FIRST: Indicate this is the first packet after join network.
577 * (((
578 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
579 )))
580
581 (((
582 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
583 )))
584
585 (((
586 **To use this mode, please run:**
587 )))
588
589 (% class="box infomessage" %)
590 (((
591 (((
592 **AT+MOD=5**
593 )))
594 )))
595
596 (% class="box infomessage" %)
597 (((
598 (((
599 **ATZ**
600 )))
601 )))
602
603 (((
604 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
605
606
607 )))
608
609
610
611 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
612
613 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
614
615 For example, if user has configured below commands:
616
617 * **AT+MOD=1 ** **~-~->** The normal working mode
618 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
619
620 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
621
622 1. Periodically uplink (Base on TDC time). Payload is same as the normal MOD (MOD 1 for above command). This uplink uses LoRaWAN (% style="color:#4f81bd" %)**unconfirmed**(%%) data type
623 1. Trigger uplink when meet the trigger condition. LT will sent two packets in this case, the first uplink use payload specify in this mod (mod=6), the second packets use the normal mod payload(MOD=1 for above settings). Both Uplinks use LoRaWAN (% style="color:#4f81bd" %)**CONFIRMED data type.**
624
625 **AT Command to set Trigger Condition**:
626
627 (% style="color:#4f81bd" %)**Trigger base on voltage**:
628
629 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
630
631 **Example:**
632
633 AT+AVLIM=3000,6000,0,2000   (If AVI1 voltage lower than 3v or higher than 6v. or AV2 voltage is higher than 2v, LT will trigger Uplink)
634
635 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
636
637
638 (% style="color:#4f81bd" %)**Trigger base on current**:
639
640 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
641
642 **Example:**
643
644 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
645
646
647 (% style="color:#4f81bd" %)**Trigger base on DI status**:
648
649 DI status trigger Flag.
650
651 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
652
653 **Example:**
654
655 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
656
657
658 **Downlink Command to set Trigger Condition**
659
660 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
661
662 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
663
664 AA: Code for this downlink Command:
665
666 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
667
668 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
669
670 yy2 yy2: AC1 or AV1 high limit.
671
672 yy3 yy3: AC2 or AV2 low limit.
673
674 Yy4 yy4: AC2 or AV2 high limit.
675
676 **Example1**: AA 00 13 88 00 00 00 00 00 00
677
678 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
679
680 **Example2**: AA 02 01 00
681
682 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
683
684 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
685
686 MOD6 Payload : total 11 bytes payload
687
688 [[image:image-20220524085923-1.png]]
689
690 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
691
692 [[image:image-20220524090106-2.png]]
693
694 * Each bits shows if the corresponding trigger has been configured.
695
696 **Example:**
697
698 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
699
700
701 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
702
703 [[image:image-20220524090249-3.png]]
704
705 * Each bits shows which status has been trigger on this uplink.
706
707 **Example:**
708
709 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
710
711
712 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
713
714 [[image:image-20220524090456-4.png]]
715
716 * Each bits shows which status has been trigger on this uplink.
717
718 **Example:**
719
720 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
721
722 00000101: Means both DI1 and DI2 trigger are enabled.
723
724
725 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
726
727 Downlink command to poll MOD6 status:
728
729 **AB 06**
730
731 When device got this command, it will send the MOD6 payload.
732
733
734 === 3.3.7 Payload Decoder ===
735
736 (((
737 **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/]]
738
739
740 )))
741
742 == 3.4 ​Configure LT via AT or Downlink ==
743
744 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
745
746 (((
747 There are two kinds of Commands:
748 )))
749
750 * (% 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]]
751
752 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
753
754 === 3.4.1 Common Commands ===
755
756 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]]
757
758
759 === 3.4.2 Sensor related commands ===
760
761 ==== 3.4.2.1 Set Transmit Interval ====
762
763 Set device uplink interval.
764
765 * AT Command:
766
767 (% class="box infomessage" %)
768 (((
769 **AT+TDC=N **
770 )))
771
772 **Example: **AT+TDC=30000. Means set interval to 30 seconds
773
774 * Downlink Payload (prefix 0x01):
775
776 (% class="box infomessage" %)
777 (((
778 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
779 )))
780
781
782 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
783
784 Set work mode.
785
786 * AT Command:
787
788 (% class="box infomessage" %)
789 (((
790 **AT+MOD=N  **
791 )))
792
793 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
794
795 * Downlink Payload (prefix 0x0A):
796
797 (% class="box infomessage" %)
798 (((
799 **0x0A aa     ~/~/ Same as AT+MOD=aa**
800 )))
801
802
803 ==== 3.4.2.3 Poll an uplink ====
804
805 * AT Command:
806
807 There is no AT Command to poll uplink
808
809 * Downlink Payload (prefix 0x08):
810
811 (% class="box infomessage" %)
812 (((
813 **0x08 FF     ~/~/ Poll an uplink,**
814 )))
815
816 **Example**: 0x08FF, ask device to send an Uplink
817
818
819 ==== 3.4.2.4 Enable Trigger Mode ====
820
821 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
822
823 * AT Command:
824
825 (% class="box infomessage" %)
826 (((
827 **AT+ADDMOD6=1 or 0**
828 )))
829
830 1: Enable Trigger Mode
831
832 0: Disable Trigger Mode
833
834 * Downlink Payload (prefix 0x0A 06):
835
836 (% class="box infomessage" %)
837 (((
838 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
839 )))
840
841
842 ==== 3.4.2.5 Poll trigger settings ====
843
844 Poll trigger settings,
845
846 * AT Command:
847
848 There is no AT Command for this feature.
849
850 * Downlink Payload (prefix 0x AB 06):
851
852 (% class="box infomessage" %)
853 (((
854 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
855 )))
856
857
858 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
859
860 Enable Disable DI1/DI2/DI2 as trigger,
861
862 * AT Command:
863
864 (% class="box infomessage" %)
865 (((
866 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
867 )))
868
869 **Example:**
870
871 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
872
873 * Downlink Payload (prefix 0xAA 02):
874
875 (% class="box infomessage" %)
876 (((
877 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
878 )))
879
880
881 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
882
883 Set DI1 or DI3(for LT-33222-L) trigger.
884
885 * AT Command:
886
887 (% class="box infomessage" %)
888 (((
889 **AT+TRIG1=a,b**
890 )))
891
892 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
893
894 b : delay timing.
895
896 **Example:**
897
898 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
899
900 * Downlink Payload (prefix 0x09 01 ):
901
902 (% class="box infomessage" %)
903 (((
904 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
905 )))
906
907
908 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
909
910 Set DI2 trigger.
911
912 * AT Command:
913
914 (% class="box infomessage" %)
915 (((
916 **AT+TRIG2=a,b**
917 )))
918
919 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
920
921 b : delay timing.
922
923 **Example:**
924
925 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
926
927 * Downlink Payload (prefix 0x09 02 ):
928
929 (% class="box infomessage" %)
930 (((
931 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
932 )))
933
934
935 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
936
937 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
938
939 * AT Command:
940
941 (% class="box infomessage" %)
942 (((
943 **AT+ACLIM. **
944 )))
945
946 * Downlink Payload (prefix 0xAA 01 ):
947
948 (% class="box infomessage" %)
949 (((
950 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
951 )))
952
953
954 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
955
956 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
957
958 * AT Command:
959
960 (% class="box infomessage" %)
961 (((
962 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
963 )))
964
965 * Downlink Payload (prefix 0xAA 00 ):
966
967 (% class="box infomessage" %)
968 (((
969 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
970 )))
971
972
973 ==== 3.4.2.11 Trigger – Set minimum interval ====
974
975 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
976
977 * AT Command:
978
979 (% class="box infomessage" %)
980 (((
981 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
982 )))
983
984 * Downlink Payload (prefix 0xAC ):
985
986 (% class="box infomessage" %)
987 (((
988 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
989 )))
990
991
992 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
993
994 * AT Command:
995
996 There is no AT Command to control Digital Output
997
998 * Downlink Payload (prefix 0x02):
999
1000 (% class="box infomessage" %)
1001 (((
1002 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1003 )))
1004
1005 (((
1006 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1007 )))
1008
1009 (((
1010 01: Low,  00: High ,  11: No action
1011 )))
1012
1013 [[image:image-20220524092754-5.png]]
1014
1015 (((
1016 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1017 )))
1018
1019 (((
1020 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1021 )))
1022
1023
1024 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1025
1026 * AT Command:
1027
1028 There is no AT Command to control Digital Output
1029
1030 * Downlink Payload (prefix 0xA9):
1031
1032 (% class="box infomessage" %)
1033 (((
1034 (((
1035 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1036 )))
1037 )))
1038
1039 This is to control the digital output time of DO pin. Include four bytes:
1040
1041 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1042
1043 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1044
1045 01: DO pins will change back to original state after timeout.
1046
1047 00: DO pins will change to an inverter state after timeout 
1048
1049 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1050
1051 [[image:image-20220524093238-6.png]]
1052
1053 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1054
1055 [[image:image-20220524093328-7.png]]
1056
1057 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1058
1059 [[image:image-20220524093351-8.png]]
1060
1061 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1062
1063 Latching time. Unit: ms
1064
1065 Device will upload a packet if downlink code executes successfully.
1066
1067 **Example payload:**
1068
1069 **~1. A9 01 01 01 01 07 D0**
1070
1071 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1072
1073 **2. A9 01 00 01 11 07 D0**
1074
1075 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1076
1077 **3. A9 00 00 00 00 07 D0**
1078
1079 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1080
1081 **4. A9 00 11 01 00 07 D0**
1082
1083 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
1084
1085
1086 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1087
1088 * AT Command:
1089
1090 There is no AT Command to control Relay Output
1091
1092 * Downlink Payload (prefix 0x03):
1093
1094 (% class="box infomessage" %)
1095 (((
1096 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1097 )))
1098
1099 (((
1100 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1101 )))
1102
1103 (((
1104 01: Close ,  00: Open , 11: No action
1105 )))
1106
1107 (((
1108 [[image:image-20220524093724-9.png]]
1109 )))
1110
1111 Device will upload a packet if downlink code executes successfully.
1112
1113
1114 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1115
1116 * AT Command:
1117
1118 There is no AT Command to control Relay Output
1119
1120 * Downlink Payload (prefix 0x05):
1121
1122 (% class="box infomessage" %)
1123 (((
1124 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1125 )))
1126
1127 This is to control the relay output time of relay. Include four bytes:
1128
1129 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1130
1131 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1132
1133 01: Relays will change back to original state after timeout.
1134
1135 00: Relays will change to an inverter state after timeout
1136
1137 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1138
1139 [[image:image-20220524093831-10.png]]
1140
1141 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1142
1143 Device will upload a packet if downlink code executes successfully.
1144
1145 **Example payload:**
1146
1147 **~1. 05 01 11 07 D0**
1148
1149 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1150
1151 **2. 05 01 10 07 D0**
1152
1153 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1154
1155 **3. 05 00 01 07 D0**
1156
1157 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1158
1159 **4. 05 00 00 07 D0**
1160
1161 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1162
1163
1164 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1165
1166 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1167
1168 * AT Command:
1169
1170 (% class="box infomessage" %)
1171 (((
1172 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1173 )))
1174
1175 * Downlink Payload (prefix 0xA5):
1176
1177 (% class="box infomessage" %)
1178 (((
1179 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1180 )))
1181
1182
1183 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1184
1185 * AT Command:
1186
1187 (% class="box infomessage" %)
1188 (((
1189 **AT+SETCNT=aa,(bb cc dd ee) **
1190 )))
1191
1192 aa: 1: Set count1,
1193
1194 2: Set count2,
1195
1196 3: Set AV1 count
1197
1198 Bb cc dd ee: number to be set
1199
1200 * Downlink Payload (prefix 0xA8):
1201
1202 (% class="box infomessage" %)
1203 (((
1204 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1205 )))
1206
1207
1208 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1209
1210 Clear counting for counting mode
1211
1212 * AT Command:
1213
1214 (% class="box infomessage" %)
1215 (((
1216 **AT+CLRCOUNT ~/~/ clear all counting**
1217 )))
1218
1219 * Downlink Payload (prefix 0xA6):
1220
1221 (% class="box infomessage" %)
1222 (((
1223 **0x A6 01     ~/~/ clear all counting,**
1224 )))
1225
1226
1227 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1228
1229 * AT Command:
1230
1231 (% class="box infomessage" %)
1232 (((
1233 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1234 )))
1235
1236 * Downlink Payload (prefix 0xA7):
1237
1238 (% class="box infomessage" %)
1239 (((
1240 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1241 )))
1242
1243 (((
1244 range: aa bb cc:0 to 16777215,  (unit:second)
1245
1246
1247 )))
1248
1249 == 3.5 Integrate with Mydevice ==
1250
1251 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:
1252
1253 (((
1254 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1255 )))
1256
1257 (((
1258 **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:
1259 )))
1260
1261 [[image:1653356737703-362.png||height="232" width="732"]]
1262
1263 [[image:image-20220524094641-11.png||height="390" width="723"]]
1264
1265 [[image:image-20220524094641-12.png||height="402" width="718"]]
1266
1267
1268 **Step 3**: Create an account or log in Mydevices.
1269
1270 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1271
1272 Search under The things network
1273
1274 [[image:1653356838789-523.png||height="337" width="740"]]
1275
1276
1277 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1278
1279 [[image:image-20220524094909-1.png||height="335" width="729"]]
1280
1281 [[image:image-20220524094909-2.png||height="337" width="729"]]
1282
1283 [[image:image-20220524094909-3.png||height="338" width="727"]]
1284
1285 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1286
1287 [[image:image-20220524094909-5.png||height="341" width="734"]]
1288
1289
1290 == 3.6 Interface Detail ==
1291
1292 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1293
1294 Support NPN Type sensor
1295
1296 [[image:1653356991268-289.png]]
1297
1298
1299 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1300
1301 (((
1302 The DI port of LT-22222-L can support NPN or PNP output sensor.
1303 )))
1304
1305 (((
1306 (((
1307 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
1308 )))
1309 )))
1310
1311 [[image:1653357170703-587.png]]
1312
1313 (((
1314 (((
1315 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1316 )))
1317 )))
1318
1319 (((
1320
1321 )))
1322
1323 (((
1324 **Example1**: Connect to a Low active sensor.
1325 )))
1326
1327 (((
1328 This type of sensor will output a low signal GND when active.
1329 )))
1330
1331 * (((
1332 Connect sensor’s output to DI1-
1333 )))
1334 * (((
1335 Connect sensor’s VCC to DI1+.
1336 )))
1337
1338 (((
1339 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1340 )))
1341
1342 (((
1343 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1344 )))
1345
1346 (((
1347 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.
1348 )))
1349
1350 (((
1351
1352 )))
1353
1354 (((
1355 **Example2**: Connect to a High active sensor.
1356 )))
1357
1358 (((
1359 This type of sensor will output a high signal (example 24v) when active.
1360 )))
1361
1362 * (((
1363 Connect sensor’s output to DI1+
1364 )))
1365 * (((
1366 Connect sensor’s GND DI1-.
1367 )))
1368
1369 (((
1370 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1371 )))
1372
1373 (((
1374 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1375 )))
1376
1377 (((
1378 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.
1379 )))
1380
1381 (((
1382
1383 )))
1384
1385 (((
1386 **Example3**: Connect to a 220v high active sensor.
1387 )))
1388
1389 (((
1390 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1391 )))
1392
1393 * (((
1394 Connect sensor’s output to DI1+ with a serial 50K resistor
1395 )))
1396 * (((
1397 Connect sensor’s GND DI1-.
1398 )))
1399
1400 (((
1401 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1402 )))
1403
1404 (((
1405 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1406 )))
1407
1408 (((
1409 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.
1410 )))
1411
1412
1413 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1414
1415 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1416
1417 [[image:1653357531600-905.png]]
1418
1419
1420 === 3.6.4 Analog Input Interface ===
1421
1422 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:
1423
1424 **AC2 = (IN2 voltage )/12**
1425
1426 [[image:1653357592296-182.png]]
1427
1428 Example to connect a 4~~20mA sensor
1429
1430 We take the wind speed sensor as an example for reference only.
1431
1432 Specifications of the wind speed sensor:
1433
1434 Red:12~~24v
1435
1436 Yellow:4~~20mA
1437
1438 Black:GND
1439
1440
1441 Connection diagram:
1442
1443 [[image:1653357640609-758.png]]
1444
1445 [[image:1653357648330-671.png||height="155" width="733"]]
1446
1447
1448 === 3.6.5 Relay Output ===
1449
1450 (((
1451 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:
1452 )))
1453
1454 [[image:image-20220524100215-9.png]]
1455
1456 [[image:image-20220524100215-10.png||height="382" width="723"]]
1457
1458
1459 == 3.7 LEDs Indicators ==
1460
1461 [[image:image-20220524100748-11.png]]
1462
1463
1464 = 4. Use AT Command =
1465
1466 == 4.1 Access AT Command ==
1467
1468 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.
1469
1470 [[image:1653358238933-385.png]]
1471
1472 (((
1473 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:
1474 )))
1475
1476 [[image:1653358355238-883.png]]
1477
1478 (((
1479 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/]]
1480 )))
1481
1482 (((
1483 AT+<CMD>?        : Help on <CMD>
1484 )))
1485
1486 (((
1487 AT+<CMD>         : Run <CMD>
1488 )))
1489
1490 (((
1491 AT+<CMD>=<value> : Set the value
1492 )))
1493
1494 (((
1495 AT+<CMD>=?       : Get the value
1496 )))
1497
1498 (((
1499 ATZ: Trig a reset of the MCU
1500 )))
1501
1502 (((
1503 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1504 )))
1505
1506 (((
1507 AT+DEUI: Get or Set the Device EUI
1508 )))
1509
1510 (((
1511 AT+DADDR: Get or Set the Device Address
1512 )))
1513
1514 (((
1515 AT+APPKEY: Get or Set the Application Key
1516 )))
1517
1518 (((
1519 AT+NWKSKEY: Get or Set the Network Session Key
1520 )))
1521
1522 (((
1523 AT+APPSKEY: Get or Set the Application Session Key
1524 )))
1525
1526 (((
1527 AT+APPEUI: Get or Set the Application EUI
1528 )))
1529
1530 (((
1531 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1532 )))
1533
1534 (((
1535 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1536 )))
1537
1538 (((
1539 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1540 )))
1541
1542 (((
1543 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1544 )))
1545
1546 (((
1547 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1548 )))
1549
1550 (((
1551 AT+RX2FQ: Get or Set the Rx2 window frequency
1552 )))
1553
1554 (((
1555 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1556 )))
1557
1558 (((
1559 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1560 )))
1561
1562 (((
1563 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1564 )))
1565
1566 (((
1567 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1568 )))
1569
1570 (((
1571 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1572 )))
1573
1574 (((
1575 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1576 )))
1577
1578 (((
1579 AT+NWKID: Get or Set the Network ID
1580 )))
1581
1582 (((
1583 AT+FCU: Get or Set the Frame Counter Uplink
1584 )))
1585
1586 (((
1587 AT+FCD: Get or Set the Frame Counter Downlink
1588 )))
1589
1590 (((
1591 AT+CLASS: Get or Set the Device Class
1592 )))
1593
1594 (((
1595 AT+JOIN: Join network
1596 )))
1597
1598 (((
1599 AT+NJS: Get OTAA Join Status
1600 )))
1601
1602 (((
1603 AT+SENDB: Send hexadecimal data along with the application port
1604 )))
1605
1606 (((
1607 AT+SEND: Send text data along with the application port
1608 )))
1609
1610 (((
1611 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1612 )))
1613
1614 (((
1615 AT+RECV: Print last received data in raw format
1616 )))
1617
1618 (((
1619 AT+VER: Get current image version and Frequency Band
1620 )))
1621
1622 (((
1623 AT+CFM: Get or Set the confirmation mode (0-1)
1624 )))
1625
1626 (((
1627 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1628 )))
1629
1630 (((
1631 AT+SNR: Get the SNR of the last received packet
1632 )))
1633
1634 (((
1635 AT+RSSI: Get the RSSI of the last received packet
1636 )))
1637
1638 (((
1639 AT+TDC: Get or set the application data transmission interval in ms
1640 )))
1641
1642 (((
1643 AT+PORT: Get or set the application port
1644 )))
1645
1646 (((
1647 AT+DISAT: Disable AT commands
1648 )))
1649
1650 (((
1651 AT+PWORD: Set password, max 9 digits
1652 )))
1653
1654 (((
1655 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1656 )))
1657
1658 (((
1659 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1660 )))
1661
1662 (((
1663 AT+CFG: Print all settings
1664
1665
1666 )))
1667
1668 == 4.2 Common AT Command Sequence ==
1669
1670 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1671
1672 (((
1673 If device has not joined network yet:
1674 )))
1675
1676 (((
1677 (% style="background-color:#dcdcdc" %)123456
1678 )))
1679
1680 (((
1681 (% style="background-color:#dcdcdc" %)AT+FDR
1682 )))
1683
1684 (((
1685 (% style="background-color:#dcdcdc" %)123456
1686 )))
1687
1688 (((
1689 (% style="background-color:#dcdcdc" %)AT+NJM=0
1690 )))
1691
1692 (((
1693 (% style="background-color:#dcdcdc" %)ATZ
1694 )))
1695
1696
1697 (((
1698 If device already joined network:
1699 )))
1700
1701 (((
1702 (% style="background-color:#dcdcdc" %)AT+NJM=0
1703 )))
1704
1705 (((
1706 (% style="background-color:#dcdcdc" %)ATZ
1707
1708
1709 )))
1710
1711 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1712
1713 (((
1714 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1715 )))
1716
1717 (((
1718 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1719 )))
1720
1721 (((
1722 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1723 )))
1724
1725 (((
1726 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1727 )))
1728
1729 (((
1730 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1731 )))
1732
1733 (((
1734 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1735 )))
1736
1737 (((
1738 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1739 )))
1740
1741 (((
1742 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1743 )))
1744
1745 (((
1746 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1747 )))
1748
1749 (((
1750 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1751 )))
1752
1753 (((
1754 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1755 )))
1756
1757 (((
1758 (% 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.
1759 )))
1760
1761 (((
1762 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1763 )))
1764
1765 (((
1766 (% style="color:red" %)**Note:**
1767 )))
1768
1769 (((
1770 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1771 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1772 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.
1773 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
1774 )))
1775
1776 (((
1777 [[image:1653359097980-169.png||height="188" width="729"]]
1778 )))
1779
1780 (((
1781
1782 )))
1783
1784 === 4.2.3 Change to Class A ===
1785
1786 If sensor JOINED
1787 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1788 ATZ
1789
1790
1791 = 5. FAQ =
1792
1793 == 5.1 How to upgrade the image? ==
1794
1795 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1796
1797 * Support new features
1798 * For bug fix
1799 * Change LoRaWAN bands.
1800 Below shows the hardware connection for how to upload an image to the LT:
1801 * [[image:1653359603330-121.png]]
1802
1803 (((
1804 **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]].
1805 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1806 **Step3: **Open flashloader; choose the correct COM port to update.
1807 **For LT-22222-L**:
1808 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.
1809 )))
1810
1811 [[image:image-20220524103407-12.png]]
1812
1813 [[image:image-20220524103429-13.png]]
1814
1815 [[image:image-20220524104033-15.png]]
1816
1817 (% 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:
1818
1819 [[image:1653360054704-518.png||height="186" width="745"]]
1820
1821
1822 (((
1823 (((
1824 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1825 )))
1826 )))
1827
1828 (((
1829 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1830
1831
1832 )))
1833
1834 (((
1835 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1836 )))
1837
1838 (((
1839 (((
1840 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1841 )))
1842 )))
1843
1844 (((
1845 (((
1846 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1847 )))
1848 )))
1849
1850 (((
1851 (% 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.
1852 )))
1853
1854 (((
1855 [[image:1653360231087-571.png||height="401" width="727"]]
1856 )))
1857
1858 (((
1859 (% 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.
1860 )))
1861
1862 (((
1863 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1864 )))
1865
1866 (((
1867 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1868 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1869 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1870 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1871 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1872 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1873 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1874 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1875 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1876 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1877 )))
1878
1879 (((
1880 As shown in below:
1881 )))
1882
1883 [[image:1653360498588-932.png||height="485" width="726"]]
1884
1885
1886 == 5.4 Can I see counting event in Serial? ==
1887
1888 (((
1889 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.
1890
1891
1892 == 5.5 Can i use point to point communication for LT-22222-L? ==
1893
1894 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1895
1896
1897 )))
1898
1899 (((
1900 = 6. Trouble Shooting =
1901 )))
1902
1903 (((
1904 (((
1905 == 6.1 Downlink doesn’t work, how to solve it? ==
1906 )))
1907 )))
1908
1909 (((
1910 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1911
1912
1913 )))
1914
1915 (((
1916 == 6.2 Have trouble to upload image. ==
1917 )))
1918
1919 (((
1920 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1921 )))
1922
1923 (((
1924
1925 )))
1926
1927 (((
1928 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1929 )))
1930
1931 (((
1932 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1933 )))
1934
1935 (((
1936
1937 )))
1938
1939 (((
1940 = 7. Order Info =
1941 )))
1942
1943 (((
1944 (((
1945 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1946 )))
1947 )))
1948
1949 (((
1950 (((
1951 (% style="color:#4f81bd" %)**XXX:**
1952 )))
1953 )))
1954
1955 (((
1956 * (((
1957 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1958 )))
1959 )))
1960
1961 (((
1962 * (((
1963 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1964 )))
1965 )))
1966
1967 (((
1968 * (((
1969 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1970 )))
1971 )))
1972
1973 (((
1974 * (((
1975 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1976 )))
1977 )))
1978
1979 (((
1980 * (((
1981 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1982 )))
1983 )))
1984
1985 (((
1986 * (((
1987 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1988 )))
1989 )))
1990
1991 (((
1992 * (((
1993 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1994 )))
1995 )))
1996
1997 (((
1998 * (((
1999 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2000 )))
2001 )))
2002
2003 (((
2004 * (((
2005 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2006
2007
2008 )))
2009
2010 = 8. Packing Info =
2011 )))
2012
2013 (((
2014 (((
2015 **Package Includes**:
2016 )))
2017 )))
2018
2019 (((
2020 (((
2021 * LT-22222-L I/O Controller x 1
2022 * Stick Antenna for LoRa RF part x 1
2023 * Bracket for controller x1
2024 * Program cable x 1
2025 )))
2026 )))
2027
2028 (((
2029 (((
2030 **Dimension and weight**:
2031 )))
2032 )))
2033
2034 (((
2035 (((
2036 * Device Size: 13.5 x 7 x 3 cm
2037 * Device Weight: 105g
2038 * Package Size / pcs : 14.5 x 8 x 5 cm
2039 * Weight / pcs : 170g
2040
2041
2042 )))
2043 )))
2044
2045 (((
2046 = 9. Support =
2047 )))
2048
2049 * (((
2050 (((
2051 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.
2052 )))
2053 )))
2054 * (((
2055 (((
2056 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
2057 )))
2058 )))
2059
2060 (((
2061 (((
2062 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2063
2064
2065 )))
2066
2067 (((
2068 = 10. Reference​​​​​ =
2069
2070 * Product Page:
2071
2072 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]]
2073
2074 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2075 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2076 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2077 )))
2078 )))
Copyright ©2010-2024 Dragino Technology Co., LTD. All rights reserved
Dragino Wiki v2.0