Version 77.91 by Xiaoling on 2022/06/10 09:29
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1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
3
4 **LT-22222-L LoRa IO Controller User Manual **
5
6
7 **Table of Contents:**
8
9 {{toc/}}
10
11
12
13
14
15
16
17 = 1.Introduction =
18
19 == 1.1 What is LT Series I/O Controller ==
20
21 (((
22 The Dragino (% style="color:blue" %)**LT series I/O Modules**(%%) are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as:** (% style="color:blue" %)analog current Input, analog voltage input(%%)**(% style="color:blue" %), **relay output**, **digital input**(%%) and (% style="color:blue" %)**digital output**(%%) etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
23 )))
24
25 (((
26 The LT I/O Controllers allows the user to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.
27 )))
28
29 (((
30 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
31 )))
32
33 (((
34 The use environment includes:
35 )))
36
37 (((
38 1) If user’s area has LoRaWAN service coverage, they can just install the I/O controller and configure it to connect the LoRaWAN provider via wireless.
39 )))
40
41 (((
42 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
43 )))
44
45 (((
46 [[image:1653295757274-912.png]]
47
48
49 )))
50
51 == 1.2  Specifications ==
52
53 (((
54
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 **Interface for Model: LT22222-L:**
80 )))
81
82 * (((
83 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
84 )))
85 * (((
86 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
87 )))
88 * (((
89 2 x Relay Output (5A@250VAC / 30VDC)
90 )))
91 * (((
92 2 x 0~~20mA Analog Input (res:0.01mA)
93 )))
94 * (((
95 2 x 0~~30V Analog Input (res:0.01v)
96 )))
97 * (((
98 Power Input 7~~ 24V DC. 
99 )))
100
101 (((
102 **LoRa Spec:**
103 )))
104
105 * (((
106 (((
107 Frequency Range:
108 )))
109
110 * (((
111 Band 1 (HF): 862 ~~ 1020 Mhz
112 )))
113 * (((
114 Band 2 (LF): 410 ~~ 528 Mhz
115 )))
116 )))
117 * (((
118 168 dB maximum link budget.
119 )))
120 * (((
121 +20 dBm - 100 mW constant RF output vs.
122 )))
123 * (((
124 +14 dBm high efficiency PA.
125 )))
126 * (((
127 Programmable bit rate up to 300 kbps.
128 )))
129 * (((
130 High sensitivity: down to -148 dBm.
131 )))
132 * (((
133 Bullet-proof front end: IIP3 = -12.5 dBm.
134 )))
135 * (((
136 Excellent blocking immunity.
137 )))
138 * (((
139 Low RX current of 10.3 mA, 200 nA register retention.
140 )))
141 * (((
142 Fully integrated synthesizer with a resolution of 61 Hz.
143 )))
144 * (((
145 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
146 )))
147 * (((
148 Built-in bit synchronizer for clock recovery.
149 )))
150 * (((
151 Preamble detection.
152 )))
153 * (((
154 127 dB Dynamic Range RSSI.
155 )))
156 * (((
157 Automatic RF Sense and CAD with ultra-fast AFC.
158 )))
159 * (((
160 Packet engine up to 256 bytes with CRC.
161
162
163 )))
164
165 == 1.3 Features ==
166
167 * LoRaWAN Class A & Class C protocol
168 * Optional Customized LoRa Protocol
169 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
170 * AT Commands to change parameters
171 * Remote configure parameters via LoRa Downlink
172 * Firmware upgradable via program port
173 * Counting
174
175 == 1.4  Applications ==
176
177 * Smart Buildings & Home Automation
178 * Logistics and Supply Chain Management
179 * Smart Metering
180 * Smart Agriculture
181 * Smart Cities
182 * Smart Factory
183
184 == 1.5 Hardware Variants ==
185
186 (% border="1" style="background-color:#f7faff; width:500px" %)
187 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
188 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
189 * 2 x Digital Input (Bi-direction)
190 * 2 x Digital Output
191 * 2 x Relay Output (5A@250VAC / 30VDC)
192 * 2 x 0~~20mA Analog Input (res:0.01mA)
193 * 2 x 0~~30V Analog Input (res:0.01v)
194 * 1 x Counting Port
195 )))
196
197 = 2. Power ON Device =
198
199 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.
200
201 (((
202 PWR will on when device is properly powered.
203 )))
204
205 [[image:1653297104069-180.png]]
206
207
208
209 = 3. Operation Mode =
210
211 == 3.1 How it works? ==
212
213 (((
214 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. 
215 )))
216
217 (((
218 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.
219
220
221 )))
222
223
224
225 == 3.2 Example to join LoRaWAN network ==
226
227 (((
228 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. 
229 )))
230
231 [[image:image-20220523172350-1.png||height="266" width="864"]]
232
233 (((
234 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:
235 )))
236
237 (((
238 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
239 )))
240
241 (((
242 Each LT is shipped with a sticker with the default device EUI as below:
243 )))
244
245 [[image:1653297924498-393.png]]
246
247 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
248
249 Add APP EUI in the application.
250
251 [[image:1653297955910-247.png||height="321" width="716"]]
252
253
254 Add APP KEY and DEV EUI
255
256 [[image:1653298023685-319.png]]
257
258
259 (((
260 **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.
261 )))
262
263 [[image:1653298044601-602.png||height="405" width="709"]]
264
265
266
267 == 3.3 Uplink Payload ==
268
269 There are five working modes + one interrupt mode on LT for different type application:
270
271 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
272 * **MOD2**: Double DI Counting + DO + RO
273 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
274 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
275 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
276 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
277
278
279
280 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
281
282 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
283
284 [[image:image-20220523174024-3.png]]
285
286 (((
287
288
289 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
290 )))
291
292 [[image:image-20220523174254-4.png]]
293
294 * RO is for relay. ROx=1 : close，ROx=0 always open.
295 * DI is for digital input. DIx=1: high or float, DIx=0: low.
296 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
297
298 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
299
300 For example if payload is: [[image:image-20220523175847-2.png]]
301
302
303 **The value for the interface is:  **
304
305 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
306
307 AVI2 channel voltage is 0x04AC/1000=1.196V
308
309 ACI1 channel current is 0x1310/1000=4.880mA
310
311 ACI2 channel current is 0x1300/1000=4.864mA
312
313 The last byte 0xAA= 10101010(B) means
314
315 * [1] RO1 relay channel is close and the RO1 LED is ON.
316 * [0] RO2 relay channel is open and RO2 LED is OFF;
317
318
319 **LT22222-L:**
320
321 * [1] DI2 channel is high input and DI2 LED is ON;
322 * [0] DI1 channel is low input;
323
324 * [0] DO3 channel output state
325 ** DO3 is float in case no load between DO3 and V+.;
326 ** DO3 is high in case there is load between DO3 and V+.
327 ** DO3 LED is off in both case
328 * [1] DO2 channel output is low and DO2 LED is ON.
329 * [0] DO1 channel output state
330 ** DO1 is float in case no load between DO1 and V+.;
331 ** DO1 is high in case there is load between DO1 and V+.
332 ** DO1 LED is off in both case
333
334
335
336 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
337
338
339 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
340
341 (((
342 Total : 11 bytes payload
343 )))
344
345 [[image:image-20220523180452-3.png]]
346
347
348 (((
349 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
350 )))
351
352 [[image:image-20220523180506-4.png]]
353
354 * RO is for relay. ROx=1 : close，ROx=0 always open.
355 * FIRST: Indicate this is the first packet after join network.
356 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
357
358 (((
359 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
360 )))
361
362 (((
363
364
365 **To use counting mode, please run:**
366 )))
367
368 (% class="box infomessage" %)
369 (((
370 (((
371 **AT+MOD=2**
372 )))
373 )))
374
375 (% class="box infomessage" %)
376 (((
377 (((
378 **ATZ**
379 )))
380 )))
381
382 (((
383
384
385 (% style="color:#4f81bd" %)**AT Commands for counting:**
386 )))
387
388 (((
389 **For LT22222-L:**
390 )))
391
392 (% class="box infomessage" %)
393 (((
394 (((
395 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
396 )))
397 )))
398
399 (% class="box infomessage" %)
400 (((
401 (((
402 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
403 )))
404 )))
405
406 (% class="box infomessage" %)
407 (((
408 (((
409 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
410 )))
411 )))
412
413 (% class="box infomessage" %)
414 (((
415 (((
416 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
417 )))
418 )))
419
420 (% class="box infomessage" %)
421 (((
422 (((
423 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
424 )))
425 )))
426
427 (% class="box infomessage" %)
428 (((
429 (((
430 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
431 )))
432 )))
433
434
435
436 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
437
438 **LT22222-L**: This mode the DI1 is used as a counting pin.
439
440 [[image:image-20220523181246-5.png]]
441
442 (((
443 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
444 )))
445
446 [[image:image-20220523181301-6.png]]
447
448 * RO is for relay. ROx=1 : close，ROx=0 always open.
449 * FIRST: Indicate this is the first packet after join network.
450 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
451
452 (((
453 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
454 )))
455
456 (((
457 **To use counting mode, please run:**
458 )))
459
460 (% class="box infomessage" %)
461 (((
462 (((
463 **AT+MOD=3**
464 )))
465 )))
466
467 (% class="box infomessage" %)
468 (((
469 (((
470 **ATZ**
471 )))
472 )))
473
474 (((
475 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
476
477
478 )))
479
480
481 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
482
483
484 **LT22222-L**: This mode the DI1 is used as a counting pin.
485
486 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.
487
488 [[image:image-20220523181903-8.png]]
489
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
507
508 **To use this mode, please run:**
509 )))
510
511 (% class="box infomessage" %)
512 (((
513 (((
514 **AT+MOD=4**
515 )))
516 )))
517
518 (% class="box infomessage" %)
519 (((
520 (((
521 **ATZ**
522 )))
523 )))
524
525 (((
526
527 )))
528
529 (((
530 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
531 )))
532
533 (((
534
535
536 **Plus below command for AVI1 Counting:**
537 )))
538
539 (% class="box infomessage" %)
540 (((
541 (((
542 **AT+SETCNT=3,60   (set AVI Count to 60)**
543 )))
544 )))
545
546 (% class="box infomessage" %)
547 (((
548 (((
549 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
550 )))
551 )))
552
553 (% class="box infomessage" %)
554 (((
555 (((
556 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
557 )))
558 )))
559
560 (% class="box infomessage" %)
561 (((
562 (((
563 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
564 )))
565 )))
566
567
568
569 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
570
571
572 **LT22222-L**: This mode the DI1 is used as a counting pin.
573
574 [[image:image-20220523182334-9.png]]
575
576 (((
577
578
579 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
580 )))
581
582 * RO is for relay. ROx=1 : close，ROx=0 always open.
583 * FIRST: Indicate this is the first packet after join network.
584 * (((
585 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
586 )))
587
588 (((
589 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
590 )))
591
592 (((
593
594
595 **To use this mode, please run:**
596 )))
597
598 (% class="box infomessage" %)
599 (((
600 (((
601 **AT+MOD=5**
602 )))
603 )))
604
605 (% class="box infomessage" %)
606 (((
607 (((
608 **ATZ**
609 )))
610 )))
611
612 (((
613 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
614 )))
615
616
617
618 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
619
620
621 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
622
623 For example, if user has configured below commands:
624
625 * **AT+MOD=1 ** **~-~->** The normal working mode
626 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
627
628 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
629
630 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
631 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.**
632
633 **AT Command to set Trigger Condition**:
634
635 (% style="color:#4f81bd" %)**Trigger base on voltage**:
636
637 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
638
639 **Example:**
640
641 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)
642
643 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
644
645
646 (% style="color:#4f81bd" %)**Trigger base on current**:
647
648 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
649
650 **Example:**
651
652 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
653
654
655 (% style="color:#4f81bd" %)**Trigger base on DI status**:
656
657 DI status trigger Flag.
658
659 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
660
661 **Example:**
662
663 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
664
665
666 **Downlink Command to set Trigger Condition**
667
668 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
669
670 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
671
672 AA: Code for this downlink Command:
673
674 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
675
676 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
677
678 yy2 yy2: AC1 or AV1 high limit.
679
680 yy3 yy3: AC2 or AV2 low limit.
681
682 Yy4 yy4: AC2 or AV2 high limit.
683
684
685 **Example1**: AA 00 13 88 00 00 00 00 00 00
686
687 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
688
689
690 **Example2**: AA 02 01 00
691
692 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
693
694
695 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
696
697 MOD6 Payload : total 11 bytes payload
698
699 [[image:image-20220524085923-1.png]]
700
701
702 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
703
704 [[image:image-20220524090106-2.png]]
705
706 * Each bits shows if the corresponding trigger has been configured.
707
708 **Example:**
709
710 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
711
712
713 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
714
715 [[image:image-20220524090249-3.png]]
716
717 * Each bits shows which status has been trigger on this uplink.
718
719 **Example:**
720
721 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
722
723
724 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
725
726 [[image:image-20220524090456-4.png]]
727
728 * Each bits shows which status has been trigger on this uplink.
729
730 **Example:**
731
732 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
733
734 00000101: Means both DI1 and DI2 trigger are enabled.
735
736
737 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
738
739 Downlink command to poll MOD6 status:
740
741 **AB 06**
742
743 When device got this command, it will send the MOD6 payload.
744
745
746
747 === 3.3.7 Payload Decoder ===
748
749 (((
750
751
752 **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/]]
753
754
755 )))
756
757
758
759 == 3.4 ​Configure LT via AT or Downlink ==
760
761 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
762
763 (((
764 There are two kinds of Commands:
765 )))
766
767 * (% 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]]
768
769 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
770
771
772
773
774 === 3.4.1 Common Commands ===
775
776 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]]
777
778
779
780 === 3.4.2 Sensor related commands ===
781
782 ==== 3.4.2.1 Set Transmit Interval ====
783
784 Set device uplink interval.
785
786 * AT Command:
787
788 (% class="box infomessage" %)
789 (((
790 **AT+TDC=N **
791 )))
792
793 **Example: **AT+TDC=30000. Means set interval to 30 seconds
794
795
796 * Downlink Payload (prefix 0x01):
797
798 (% class="box infomessage" %)
799 (((
800 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
801 )))
802
803
804
805 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
806
807 Set work mode.
808
809 * AT Command:
810
811 (% class="box infomessage" %)
812 (((
813 **AT+MOD=N  **
814 )))
815
816 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
817
818
819 * Downlink Payload (prefix 0x0A):
820
821 (% class="box infomessage" %)
822 (((
823 **0x0A aa     ~/~/ Same as AT+MOD=aa**
824 )))
825
826
827
828 ==== 3.4.2.3 Poll an uplink ====
829
830 * AT Command:
831
832 There is no AT Command to poll uplink
833
834
835 * Downlink Payload (prefix 0x08):
836
837 (% class="box infomessage" %)
838 (((
839 **0x08 FF     ~/~/ Poll an uplink,**
840 )))
841
842 **Example**: 0x08FF, ask device to send an Uplink
843
844
845
846 ==== 3.4.2.4 Enable Trigger Mode ====
847
848 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
849
850 * AT Command:
851
852 (% class="box infomessage" %)
853 (((
854 **AT+ADDMOD6=1 or 0**
855 )))
856
857 1: Enable Trigger Mode
858
859 0: Disable Trigger Mode
860
861
862 * Downlink Payload (prefix 0x0A 06):
863
864 (% class="box infomessage" %)
865 (((
866 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
867 )))
868
869
870
871 ==== 3.4.2.5 Poll trigger settings ====
872
873 Poll trigger settings,
874
875 * AT Command:
876
877 There is no AT Command for this feature.
878
879
880 * Downlink Payload (prefix 0x AB 06):
881
882 (% class="box infomessage" %)
883 (((
884 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
885 )))
886
887
888
889 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
890
891 Enable Disable DI1/DI2/DI2 as trigger,
892
893 * AT Command:
894
895 (% class="box infomessage" %)
896 (((
897 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
898 )))
899
900
901 **Example:**
902
903 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
904
905 * Downlink Payload (prefix 0xAA 02):
906
907 (% class="box infomessage" %)
908 (((
909 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
910 )))
911
912
913
914 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
915
916 Set DI1 or DI3(for LT-33222-L) trigger.
917
918 * AT Command:
919
920 (% class="box infomessage" %)
921 (((
922 **AT+TRIG1=a,b**
923 )))
924
925 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
926
927 b : delay timing.
928
929
930 **Example:**
931
932 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
933
934
935 * Downlink Payload (prefix 0x09 01 ):
936
937 (% class="box infomessage" %)
938 (((
939 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
940 )))
941
942
943
944 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
945
946 Set DI2 trigger.
947
948 * AT Command:
949
950 (% class="box infomessage" %)
951 (((
952 **AT+TRIG2=a,b**
953 )))
954
955 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
956
957 b : delay timing.
958
959
960 **Example:**
961
962 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
963
964
965 * Downlink Payload (prefix 0x09 02 ):
966
967 (% class="box infomessage" %)
968 (((
969 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
970 )))
971
972
973
974 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
975
976 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
977
978 * AT Command:
979
980 (% class="box infomessage" %)
981 (((
982 **AT+ACLIM. **
983 )))
984
985
986 * Downlink Payload (prefix 0xAA 01 ):
987
988 (% class="box infomessage" %)
989 (((
990 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
991 )))
992
993
994
995 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
996
997 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
998
999 * AT Command:
1000
1001 (% class="box infomessage" %)
1002 (((
1003 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
1004 )))
1005
1006
1007 * Downlink Payload (prefix 0xAA 00 ):
1008
1009 (% class="box infomessage" %)
1010 (((
1011 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
1012 )))
1013
1014
1015
1016 ==== 3.4.2.11 Trigger – Set minimum interval ====
1017
1018 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
1019
1020 * AT Command:
1021
1022 (% class="box infomessage" %)
1023 (((
1024 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1025 )))
1026
1027
1028 * Downlink Payload (prefix 0xAC ):
1029
1030 (% class="box infomessage" %)
1031 (((
1032 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1033 )))
1034
1035
1036
1037 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1038
1039 * AT Command:
1040
1041 There is no AT Command to control Digital Output
1042
1043
1044 * Downlink Payload (prefix 0x02):
1045
1046 (% class="box infomessage" %)
1047 (((
1048 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1049 )))
1050
1051 (((
1052 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1053 )))
1054
1055 (((
1056 01: Low,  00: High ,  11: No action
1057 )))
1058
1059 [[image:image-20220524092754-5.png]]
1060
1061 (((
1062 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1063 )))
1064
1065 (((
1066 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1067 )))
1068
1069
1070
1071 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1072
1073 * AT Command:
1074
1075 There is no AT Command to control Digital Output
1076
1077
1078 * Downlink Payload (prefix 0xA9):
1079
1080 (% class="box infomessage" %)
1081 (((
1082 (((
1083 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1084 )))
1085 )))
1086
1087 This is to control the digital output time of DO pin. Include four bytes:
1088
1089 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1090
1091 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1092
1093 01: DO pins will change back to original state after timeout.
1094
1095 00: DO pins will change to an inverter state after timeout 
1096
1097
1098 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1099
1100 [[image:image-20220524093238-6.png]]
1101
1102
1103 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1104
1105 [[image:image-20220524093328-7.png]]
1106
1107
1108 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1109
1110 [[image:image-20220524093351-8.png]]
1111
1112
1113 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1114
1115 Latching time. Unit: ms
1116
1117 Device will upload a packet if downlink code executes successfully.
1118
1119
1120 **Example payload:**
1121
1122 **~1. A9 01 01 01 01 07 D0**
1123
1124 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1125
1126 **2. A9 01 00 01 11 07 D0**
1127
1128 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1129
1130 **3. A9 00 00 00 00 07 D0**
1131
1132 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1133
1134 **4. A9 00 11 01 00 07 D0**
1135
1136 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
1137
1138
1139
1140 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1141
1142 * AT Command:
1143
1144 There is no AT Command to control Relay Output
1145
1146
1147 * Downlink Payload (prefix 0x03):
1148
1149 (% class="box infomessage" %)
1150 (((
1151 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1152 )))
1153
1154 (((
1155 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1156 )))
1157
1158 (((
1159 01: Close ,  00: Open , 11: No action
1160 )))
1161
1162 (((
1163 [[image:image-20220524093724-9.png]]
1164 )))
1165
1166 Device will upload a packet if downlink code executes successfully.
1167
1168
1169
1170 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1171
1172 * AT Command:
1173
1174 There is no AT Command to control Relay Output
1175
1176
1177 * Downlink Payload (prefix 0x05):
1178
1179 (% class="box infomessage" %)
1180 (((
1181 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1182 )))
1183
1184 This is to control the relay output time of relay. Include four bytes:
1185
1186 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1187
1188 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1189
1190 01: Relays will change back to original state after timeout.
1191
1192 00: Relays will change to an inverter state after timeout
1193
1194
1195 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1196
1197 [[image:image-20220524093831-10.png]]
1198
1199
1200 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1201
1202 Device will upload a packet if downlink code executes successfully.
1203
1204
1205 **Example payload:**
1206
1207 **~1. 05 01 11 07 D0**
1208
1209 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1210
1211 **2. 05 01 10 07 D0**
1212
1213 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1214
1215 **3. 05 00 01 07 D0**
1216
1217 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1218
1219 **4. 05 00 00 07 D0**
1220
1221 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1222
1223
1224
1225 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1226
1227 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1228
1229 * AT Command:
1230
1231 (% class="box infomessage" %)
1232 (((
1233 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1234 )))
1235
1236
1237 * Downlink Payload (prefix 0xA5):
1238
1239 (% class="box infomessage" %)
1240 (((
1241 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1242 )))
1243
1244
1245
1246 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1247
1248 * AT Command:
1249
1250 (% class="box infomessage" %)
1251 (((
1252 **AT+SETCNT=aa,(bb cc dd ee) **
1253 )))
1254
1255 aa: 1: Set count1,
1256
1257 2: Set count2,
1258
1259 3: Set AV1 count
1260
1261 Bb cc dd ee: number to be set
1262
1263
1264 * Downlink Payload (prefix 0xA8):
1265
1266 (% class="box infomessage" %)
1267 (((
1268 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1269 )))
1270
1271
1272
1273 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1274
1275 Clear counting for counting mode
1276
1277 * AT Command:
1278
1279 (% class="box infomessage" %)
1280 (((
1281 **AT+CLRCOUNT ~/~/ clear all counting**
1282 )))
1283
1284 * Downlink Payload (prefix 0xA6):
1285
1286 (% class="box infomessage" %)
1287 (((
1288 **0x A6 01     ~/~/ clear all counting,**
1289 )))
1290
1291
1292
1293 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1294
1295 * AT Command:
1296
1297 (% class="box infomessage" %)
1298 (((
1299 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1300 )))
1301
1302 * Downlink Payload (prefix 0xA7):
1303
1304 (% class="box infomessage" %)
1305 (((
1306 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1307 )))
1308
1309 (((
1310 range: aa bb cc:0 to 16777215,  (unit:second)
1311
1312
1313 )))
1314
1315
1316 == 3.5 Integrate with Mydevice ==
1317
1318 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:
1319
1320 (((
1321 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1322 )))
1323
1324 (((
1325 (% 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:
1326 )))
1327
1328 [[image:1653356737703-362.png||height="232" width="732"]]
1329
1330 [[image:image-20220524094641-11.png||height="390" width="723"]]
1331
1332
1333 [[image:image-20220524094641-12.png||height="402" width="718"]]
1334
1335
1336 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1337
1338 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1339
1340 Search under The things network
1341
1342 [[image:1653356838789-523.png||height="337" width="740"]]
1343
1344
1345
1346 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1347
1348 [[image:image-20220524094909-1.png||height="335" width="729"]]
1349
1350
1351 [[image:image-20220524094909-2.png||height="337" width="729"]]
1352
1353
1354 [[image:image-20220524094909-3.png||height="338" width="727"]]
1355
1356
1357 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1358
1359
1360 [[image:image-20220524094909-5.png||height="341" width="734"]]
1361
1362
1363
1364 == 3.6 Interface Detail ==
1365
1366 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1367
1368 Support NPN Type sensor
1369
1370 [[image:1653356991268-289.png]]
1371
1372
1373
1374 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1375
1376 (((
1377 The DI port of LT-22222-L can support NPN or PNP output sensor.
1378 )))
1379
1380 (((
1381 (((
1382 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
1383 )))
1384 )))
1385
1386 [[image:1653357170703-587.png]]
1387
1388 (((
1389 (((
1390 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1391 )))
1392 )))
1393
1394 (((
1395
1396 )))
1397
1398 (((
1399 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1400 )))
1401
1402 (((
1403 This type of sensor will output a low signal GND when active.
1404 )))
1405
1406 * (((
1407 Connect sensor’s output to DI1-
1408 )))
1409 * (((
1410 Connect sensor’s VCC to DI1+.
1411 )))
1412
1413 (((
1414 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1415 )))
1416
1417 (((
1418 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1419 )))
1420
1421 (((
1422 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.
1423 )))
1424
1425 (((
1426
1427 )))
1428
1429 (((
1430 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1431 )))
1432
1433 (((
1434 This type of sensor will output a high signal (example 24v) when active.
1435 )))
1436
1437 * (((
1438 Connect sensor’s output to DI1+
1439 )))
1440 * (((
1441 Connect sensor’s GND DI1-.
1442 )))
1443
1444 (((
1445 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1446 )))
1447
1448 (((
1449 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1450 )))
1451
1452 (((
1453 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.
1454 )))
1455
1456 (((
1457
1458 )))
1459
1460 (((
1461 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1462 )))
1463
1464 (((
1465 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1466 )))
1467
1468 * (((
1469 Connect sensor’s output to DI1+ with a serial 50K resistor
1470 )))
1471 * (((
1472 Connect sensor’s GND DI1-.
1473 )))
1474
1475 (((
1476 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1477 )))
1478
1479 (((
1480 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1481 )))
1482
1483 (((
1484 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.
1485 )))
1486
1487
1488
1489 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1490
1491 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1492
1493 [[image:1653357531600-905.png]]
1494
1495
1496
1497 === 3.6.4 Analog Input Interface ===
1498
1499 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:
1500
1501
1502 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1503
1504 [[image:1653357592296-182.png]]
1505
1506 Example to connect a 4~~20mA sensor
1507
1508 We take the wind speed sensor as an example for reference only.
1509
1510
1511 **Specifications of the wind speed sensor:**
1512
1513 Red:  12~~24v
1514
1515 Yellow:  4~~20mA
1516
1517 Black:  GND
1518
1519
1520 **Connection diagram:**
1521
1522 [[image:1653357640609-758.png]]
1523
1524 [[image:1653357648330-671.png||height="155" width="733"]]
1525
1526
1527
1528 === 3.6.5 Relay Output ===
1529
1530 (((
1531 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:
1532 )))
1533
1534 [[image:image-20220524100215-9.png]]
1535
1536 [[image:image-20220524100215-10.png||height="382" width="723"]]
1537
1538
1539
1540 == 3.7 LEDs Indicators ==
1541
1542 [[image:image-20220524100748-11.png]]
1543
1544
1545 = 4. Use AT Command =
1546
1547 == 4.1 Access AT Command ==
1548
1549 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.
1550
1551 [[image:1653358238933-385.png]]
1552
1553
1554 (((
1555 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:
1556 )))
1557
1558 [[image:1653358355238-883.png]]
1559
1560
1561 (((
1562 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/]]
1563 )))
1564
1565 (((
1566 AT+<CMD>?        : Help on <CMD>
1567 )))
1568
1569 (((
1570 AT+<CMD>         : Run <CMD>
1571 )))
1572
1573 (((
1574 AT+<CMD>=<value> : Set the value
1575 )))
1576
1577 (((
1578 AT+<CMD>=?       : Get the value
1579 )))
1580
1581 (((
1582 ATZ: Trig a reset of the MCU
1583 )))
1584
1585 (((
1586 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1587 )))
1588
1589 (((
1590 AT+DEUI: Get or Set the Device EUI
1591 )))
1592
1593 (((
1594 AT+DADDR: Get or Set the Device Address
1595 )))
1596
1597 (((
1598 AT+APPKEY: Get or Set the Application Key
1599 )))
1600
1601 (((
1602 AT+NWKSKEY: Get or Set the Network Session Key
1603 )))
1604
1605 (((
1606 AT+APPSKEY: Get or Set the Application Session Key
1607 )))
1608
1609 (((
1610 AT+APPEUI: Get or Set the Application EUI
1611 )))
1612
1613 (((
1614 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1615 )))
1616
1617 (((
1618 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1619 )))
1620
1621 (((
1622 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1623 )))
1624
1625 (((
1626 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1627 )))
1628
1629 (((
1630 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1631 )))
1632
1633 (((
1634 AT+RX2FQ: Get or Set the Rx2 window frequency
1635 )))
1636
1637 (((
1638 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1639 )))
1640
1641 (((
1642 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1643 )))
1644
1645 (((
1646 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1647 )))
1648
1649 (((
1650 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1651 )))
1652
1653 (((
1654 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1655 )))
1656
1657 (((
1658 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1659 )))
1660
1661 (((
1662 AT+NWKID: Get or Set the Network ID
1663 )))
1664
1665 (((
1666 AT+FCU: Get or Set the Frame Counter Uplink
1667 )))
1668
1669 (((
1670 AT+FCD: Get or Set the Frame Counter Downlink
1671 )))
1672
1673 (((
1674 AT+CLASS: Get or Set the Device Class
1675 )))
1676
1677 (((
1678 AT+JOIN: Join network
1679 )))
1680
1681 (((
1682 AT+NJS: Get OTAA Join Status
1683 )))
1684
1685 (((
1686 AT+SENDB: Send hexadecimal data along with the application port
1687 )))
1688
1689 (((
1690 AT+SEND: Send text data along with the application port
1691 )))
1692
1693 (((
1694 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1695 )))
1696
1697 (((
1698 AT+RECV: Print last received data in raw format
1699 )))
1700
1701 (((
1702 AT+VER: Get current image version and Frequency Band
1703 )))
1704
1705 (((
1706 AT+CFM: Get or Set the confirmation mode (0-1)
1707 )))
1708
1709 (((
1710 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1711 )))
1712
1713 (((
1714 AT+SNR: Get the SNR of the last received packet
1715 )))
1716
1717 (((
1718 AT+RSSI: Get the RSSI of the last received packet
1719 )))
1720
1721 (((
1722 AT+TDC: Get or set the application data transmission interval in ms
1723 )))
1724
1725 (((
1726 AT+PORT: Get or set the application port
1727 )))
1728
1729 (((
1730 AT+DISAT: Disable AT commands
1731 )))
1732
1733 (((
1734 AT+PWORD: Set password, max 9 digits
1735 )))
1736
1737 (((
1738 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1739 )))
1740
1741 (((
1742 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1743 )))
1744
1745 (((
1746 AT+CFG: Print all settings
1747
1748
1749 )))
1750
1751
1752
1753 == 4.2 Common AT Command Sequence ==
1754
1755 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1756
1757 (((
1758
1759
1760 **If device has not joined network yet:**
1761 )))
1762
1763 (((
1764 (% style="background-color:#dcdcdc" %)123456
1765 )))
1766
1767 (((
1768 (% style="background-color:#dcdcdc" %)AT+FDR
1769 )))
1770
1771 (((
1772 (% style="background-color:#dcdcdc" %)123456
1773 )))
1774
1775 (((
1776 (% style="background-color:#dcdcdc" %)AT+NJM=0
1777 )))
1778
1779 (((
1780 (% style="background-color:#dcdcdc" %)ATZ
1781 )))
1782
1783
1784 (((
1785 **If device already joined network:**
1786 )))
1787
1788 (((
1789 (% style="background-color:#dcdcdc" %)AT+NJM=0
1790 )))
1791
1792 (((
1793 (% style="background-color:#dcdcdc" %)ATZ
1794
1795
1796 )))
1797
1798
1799
1800 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1801
1802 (((
1803
1804
1805 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1806 )))
1807
1808 (((
1809 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1810 )))
1811
1812 (((
1813 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1814 )))
1815
1816 (((
1817 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1818 )))
1819
1820 (((
1821 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1822 )))
1823
1824 (((
1825 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1826 )))
1827
1828 (((
1829 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1830 )))
1831
1832 (((
1833 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1834 )))
1835
1836 (((
1837 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1838 )))
1839
1840 (((
1841 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1842 )))
1843
1844 (((
1845 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1846 )))
1847
1848 (((
1849 (% 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.
1850 )))
1851
1852 (((
1853 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1854
1855
1856 )))
1857
1858 (((
1859 (% style="color:red" %)**Note:**
1860 )))
1861
1862 (((
1863 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1864 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1865 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.
1866 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
1867 )))
1868
1869 (((
1870 [[image:1653359097980-169.png||height="188" width="729"]]
1871 )))
1872
1873 (((
1874
1875 )))
1876
1877
1878 === 4.2.3 Change to Class A ===
1879
1880 If sensor JOINED
1881 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1882 ATZ
1883
1884
1885 = 5. FAQ =
1886
1887 == 5.1 How to upgrade the image? ==
1888
1889
1890 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1891
1892 * Support new features
1893 * For bug fix
1894 * Change LoRaWAN bands.
1895
1896 Below shows the hardware connection for how to upload an image to the LT:
1897
1898 [[image:1653359603330-121.png]]
1899
1900
1901 (((
1902 (% 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]].
1903 (% 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/]].
1904 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1905
1906
1907 (% style="color:blue" %)**For LT-22222-L**(%%):
1908 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.
1909 )))
1910
1911 [[image:image-20220524103407-12.png]]
1912
1913 [[image:image-20220524103429-13.png]]
1914
1915 [[image:image-20220524104033-15.png]]
1916
1917
1918 (% 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:
1919
1920 [[image:1653360054704-518.png||height="186" width="745"]]
1921
1922
1923 (((
1924 (((
1925
1926
1927 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1928 )))
1929 )))
1930
1931 (((
1932 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1933 )))
1934
1935 (((
1936
1937
1938 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1939 )))
1940
1941 (((
1942 (((
1943 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1944 )))
1945 )))
1946
1947 (((
1948 (((
1949 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1950
1951
1952 )))
1953 )))
1954
1955 (((
1956 (% 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.
1957 )))
1958
1959 (((
1960 [[image:1653360231087-571.png||height="401" width="727"]]
1961 )))
1962
1963 (((
1964 (% 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.
1965 )))
1966
1967
1968 (((
1969 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1970 )))
1971
1972 (((
1973 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1974 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1975 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1976 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1977 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1978 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1979 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1980 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1981 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1982 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1983 )))
1984
1985
1986 (((
1987 As shown in below:
1988 )))
1989
1990 [[image:1653360498588-932.png||height="485" width="726"]]
1991
1992
1993 == 5.4 Can I see counting event in Serial? ==
1994
1995 (((
1996 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.
1997
1998
1999 == 5.5 Can i use point to point communication for LT-22222-L? ==
2000
2001 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
2002 )))
2003
2004 (((
2005
2006
2007 = 6. Trouble Shooting =
2008 )))
2009
2010 (((
2011 (((
2012 == 6.1 Downlink doesn’t work, how to solve it? ==
2013 )))
2014 )))
2015
2016 (((
2017 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
2018 )))
2019
2020 (((
2021
2022
2023 == 6.2 Have trouble to upload image. ==
2024 )))
2025
2026 (((
2027 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2028 )))
2029
2030 (((
2031
2032
2033 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2034 )))
2035
2036 (((
2037 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2038 )))
2039
2040
2041
2042 = 7. Order Info =
2043
2044
2045 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2046
2047
2048 (% style="color:#4f81bd" %)**XXX:**
2049
2050 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2051 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2052 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2053 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2054 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2055 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2056 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2057 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2058 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2059
2060 = 8. Packing Info =
2061
2062
2063 **Package Includes**:
2064
2065 * LT-22222-L I/O Controller x 1
2066 * Stick Antenna for LoRa RF part x 1
2067 * Bracket for controller x1
2068 * Program cable x 1
2069
2070 **Dimension and weight**:
2071
2072 * Device Size: 13.5 x 7 x 3 cm
2073 * Device Weight: 105g
2074 * Package Size / pcs : 14.5 x 8 x 5 cm
2075 * Weight / pcs : 170g
2076
2077 = 9. Support =
2078
2079 * (((
2080 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.
2081 )))
2082 * (((
2083 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]]
2084 )))
2085
2086 = 10. Reference​​​​​ =
2087
2088 * 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]]
2089 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2090 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2091 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
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