Version 75.9 by Xiaoling on 2022/06/01 17:28
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1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
3
4 **LT-22222-L LoRa IO Controller User Manual **
5
6
7 **Table of Contents:**
8
9 {{toc/}}
10
11
12
13
14 = 1.Introduction =
15
16 == 1.1 What is LT Series I/O Controller ==
17
18 (((
19 The Dragino (% style="color:blue" %)**LT series I/O Modules**(%%) are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as:** (% style="color:blue" %)analog current Input, analog voltage input(%%)**(% style="color:blue" %), **relay output**, **digital input**(%%) and (% style="color:blue" %)**digital output**(%%) etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring.
20 )))
21
22 (((
23 The LT I/O Controllers allows the user to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. It targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.
24 )))
25
26 (((
27 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
28 )))
29
30 (((
31 The use environment includes:
32 )))
33
34 (((
35 1) If user’s area has LoRaWAN service coverage, they can just install the I/O controller and configure it to connect the LoRaWAN provider via wireless.
36 )))
37
38 (((
39 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
40 )))
41
42 (((
43 [[image:1653295757274-912.png]]
44
45
46 )))
47
48 == 1.2  Specifications ==
49
50 (((
51 **Hardware System:**
52 )))
53
54 * (((
55 STM32L072CZT6 MCU
56 )))
57 * (((
58 SX1276/78 Wireless Chip 
59 )))
60 * (((
61 (((
62 Power Consumption:
63 )))
64
65 * (((
66 Idle: 4mA@12v
67 )))
68 * (((
69 20dB Transmit: 34mA@12v
70 )))
71 )))
72
73 (((
74 **Interface for Model: LT22222-L:**
75 )))
76
77 * (((
78 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
79 )))
80 * (((
81 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
82 )))
83 * (((
84 2 x Relay Output (5A@250VAC / 30VDC)
85 )))
86 * (((
87 2 x 0~~20mA Analog Input (res:0.01mA)
88 )))
89 * (((
90 2 x 0~~30V Analog Input (res:0.01v)
91 )))
92 * (((
93 Power Input 7~~ 24V DC. 
94 )))
95
96 (((
97 **LoRa Spec:**
98 )))
99
100 * (((
101 (((
102 Frequency Range:
103 )))
104
105 * (((
106 Band 1 (HF): 862 ~~ 1020 Mhz
107 )))
108 * (((
109 Band 2 (LF): 410 ~~ 528 Mhz
110 )))
111 )))
112 * (((
113 168 dB maximum link budget.
114 )))
115 * (((
116 +20 dBm - 100 mW constant RF output vs.
117 )))
118 * (((
119 +14 dBm high efficiency PA.
120 )))
121 * (((
122 Programmable bit rate up to 300 kbps.
123 )))
124 * (((
125 High sensitivity: down to -148 dBm.
126 )))
127 * (((
128 Bullet-proof front end: IIP3 = -12.5 dBm.
129 )))
130 * (((
131 Excellent blocking immunity.
132 )))
133 * (((
134 Low RX current of 10.3 mA, 200 nA register retention.
135 )))
136 * (((
137 Fully integrated synthesizer with a resolution of 61 Hz.
138 )))
139 * (((
140 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
141 )))
142 * (((
143 Built-in bit synchronizer for clock recovery.
144 )))
145 * (((
146 Preamble detection.
147 )))
148 * (((
149 127 dB Dynamic Range RSSI.
150 )))
151 * (((
152 Automatic RF Sense and CAD with ultra-fast AFC.
153 )))
154 * (((
155 Packet engine up to 256 bytes with CRC.
156
157
158 )))
159
160 == 1.3 Features ==
161
162 * LoRaWAN Class A & Class C protocol
163 * Optional Customized LoRa Protocol
164 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
165 * AT Commands to change parameters
166 * Remote configure parameters via LoRa Downlink
167 * Firmware upgradable via program port
168 * Counting
169
170
171
172 == 1.4  Applications ==
173
174 * Smart Buildings & Home Automation
175 * Logistics and Supply Chain Management
176 * Smart Metering
177 * Smart Agriculture
178 * Smart Cities
179 * Smart Factory
180
181
182
183 == 1.5 Hardware Variants ==
184
185 (% border="1" style="background-color:#f7faff; width:500px" %)
186 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
187 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
188 * 2 x Digital Input (Bi-direction)
189 * 2 x Digital Output
190 * 2 x Relay Output (5A@250VAC / 30VDC)
191 * 2 x 0~~20mA Analog Input (res:0.01mA)
192 * 2 x 0~~30V Analog Input (res:0.01v)
193 * 1 x Counting Port
194 )))
195
196
197
198 = 2. Power ON Device =
199
200 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.
201
202 (((
203 PWR will on when device is properly powered.
204 )))
205
206 [[image:1653297104069-180.png]]
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 == 3.2 Example to join LoRaWAN network ==
224
225 (((
226 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. 
227 )))
228
229 [[image:image-20220523172350-1.png||height="266" width="864"]]
230
231 (((
232 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:
233 )))
234
235 (((
236 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
237 )))
238
239 (((
240 Each LT is shipped with a sticker with the default device EUI as below:
241 )))
242
243 [[image:1653297924498-393.png]]
244
245 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
246
247 Add APP EUI in the application.
248
249 [[image:1653297955910-247.png||height="321" width="716"]]
250
251
252 Add APP KEY and DEV EUI
253
254 [[image:1653298023685-319.png]]
255
256
257 (((
258 **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.
259 )))
260
261 [[image:1653298044601-602.png||height="405" width="709"]]
262
263
264 == 3.3 Uplink Payload ==
265
266 There are five working modes + one interrupt mode on LT for different type application:
267
268 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
269 * **MOD2**: Double DI Counting + DO + RO
270 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
271 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
272 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
273 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
274
275 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
276
277 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
278
279 [[image:image-20220523174024-3.png]]
280
281 (((
282 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
283 )))
284
285 [[image:image-20220523174254-4.png]]
286
287 * RO is for relay. ROx=1 : close，ROx=0 always open.
288 * DI is for digital input. DIx=1: high or float, DIx=0: low.
289 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
290
291 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
292
293 For example if payload is: [[image:image-20220523175847-2.png]]
294
295 **The value for the interface is:  **
296
297 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
298
299 AVI2 channel voltage is 0x04AC/1000=1.196V
300
301 ACI1 channel current is 0x1310/1000=4.880mA
302
303 ACI2 channel current is 0x1300/1000=4.864mA
304
305 The last byte 0xAA= 10101010(B) means
306
307 * [1] RO1 relay channel is close and the RO1 LED is ON.
308 * [0] RO2 relay channel is open and RO2 LED is OFF;
309
310 **LT22222-L:**
311
312 * [1] DI2 channel is high input and DI2 LED is ON;
313 * [0] DI1 channel is low input;
314
315 * [0] DO3 channel output state
316 ** DO3 is float in case no load between DO3 and V+.;
317 ** DO3 is high in case there is load between DO3 and V+.
318 ** DO3 LED is off in both case
319 * [1] DO2 channel output is low and DO2 LED is ON.
320 * [0] DO1 channel output state
321 ** DO1 is float in case no load between DO1 and V+.;
322 ** DO1 is high in case there is load between DO1 and V+.
323 ** DO1 LED is off in both case
324
325 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
326
327 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
328
329 (((
330 Total : 11 bytes payload
331 )))
332
333 [[image:image-20220523180452-3.png]]
334
335 (((
336 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
337 )))
338
339 [[image:image-20220523180506-4.png]]
340
341 * RO is for relay. ROx=1 : close，ROx=0 always open.
342 * FIRST: Indicate this is the first packet after join network.
343 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
344
345 (((
346 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
347 )))
348
349 (((
350 **To use counting mode, please run:**
351 )))
352
353 (% class="box infomessage" %)
354 (((
355 (((
356 **AT+MOD=2**
357 )))
358 )))
359
360 (% class="box infomessage" %)
361 (((
362 (((
363 **ATZ**
364 )))
365 )))
366
367 (((
368 (% style="color:#4f81bd" %)**AT Commands for counting:**
369 )))
370
371 (((
372 **For LT22222-L:**
373 )))
374
375 (% class="box infomessage" %)
376 (((
377 (((
378 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
379 )))
380 )))
381
382 (% class="box infomessage" %)
383 (((
384 (((
385 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
386 )))
387 )))
388
389 (% class="box infomessage" %)
390 (((
391 (((
392 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
393 )))
394 )))
395
396 (% class="box infomessage" %)
397 (((
398 (((
399 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
400 )))
401 )))
402
403 (% class="box infomessage" %)
404 (((
405 (((
406 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
407 )))
408 )))
409
410 (% class="box infomessage" %)
411 (((
412 (((
413 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
414 )))
415 )))
416
417
418 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
419
420 **LT22222-L**: This mode the DI1 is used as a counting pin.
421
422 [[image:image-20220523181246-5.png]]
423
424 (((
425 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
426 )))
427
428 [[image:image-20220523181301-6.png]]
429
430 * RO is for relay. ROx=1 : close，ROx=0 always open.
431 * FIRST: Indicate this is the first packet after join network.
432 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
433
434 (((
435 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
436 )))
437
438 (((
439 **To use counting mode, please run:**
440 )))
441
442 (% class="box infomessage" %)
443 (((
444 (((
445 **AT+MOD=3**
446 )))
447 )))
448
449 (% class="box infomessage" %)
450 (((
451 (((
452 **ATZ**
453 )))
454 )))
455
456 (((
457 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
458
459
460 )))
461
462 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
463
464 **LT22222-L**: This mode the DI1 is used as a counting pin.
465
466 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.
467
468 [[image:image-20220523181903-8.png]]
469
470 (((
471 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
472 )))
473
474 [[image:image-20220523181727-7.png]]
475
476 * RO is for relay. ROx=1 : close，ROx=0 always open.
477 * FIRST: Indicate this is the first packet after join network.
478 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
479
480 (((
481 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
482 )))
483
484 (((
485 **To use this mode, please run:**
486 )))
487
488 (% class="box infomessage" %)
489 (((
490 (((
491 **AT+MOD=4**
492 )))
493 )))
494
495 (% class="box infomessage" %)
496 (((
497 (((
498 **ATZ**
499 )))
500 )))
501
502 (((
503
504 )))
505
506 (((
507 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
508 )))
509
510 (((
511 **Plus below command for AVI1 Counting:**
512 )))
513
514 (% class="box infomessage" %)
515 (((
516 (((
517 **AT+SETCNT=3,60   (set AVI Count to 60)**
518 )))
519 )))
520
521 (% class="box infomessage" %)
522 (((
523 (((
524 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
525 )))
526 )))
527
528 (% class="box infomessage" %)
529 (((
530 (((
531 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
532 )))
533 )))
534
535 (% class="box infomessage" %)
536 (((
537 (((
538 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
539 )))
540 )))
541
542
543 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
544
545 **LT22222-L**: This mode the DI1 is used as a counting pin.
546
547 [[image:image-20220523182334-9.png]]
548
549 (((
550 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
551 )))
552
553 * RO is for relay. ROx=1 : close，ROx=0 always open.
554 * FIRST: Indicate this is the first packet after join network.
555 * (((
556 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
557 )))
558
559 (((
560 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
561 )))
562
563 (((
564 **To use this mode, please run:**
565 )))
566
567 (% class="box infomessage" %)
568 (((
569 (((
570 **AT+MOD=5**
571 )))
572 )))
573
574 (% class="box infomessage" %)
575 (((
576 (((
577 **ATZ**
578 )))
579 )))
580
581 (((
582 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
583
584
585 )))
586
587 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
588
589 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
590
591 For example, if user has configured below commands:
592
593 * **AT+MOD=1 ** **~-~->** The normal working mode
594 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
595
596 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
597
598 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
599 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.**
600
601 **AT Command to set Trigger Condition**:
602
603 (% style="color:#4f81bd" %)**Trigger base on voltage**:
604
605 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
606
607 **Example:**
608
609 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)
610
611 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
612
613 (% style="color:#4f81bd" %)**Trigger base on current**:
614
615 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
616
617 **Example:**
618
619 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
620
621 (% style="color:#4f81bd" %)**Trigger base on DI status**:
622
623 DI status trigger Flag.
624
625 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
626
627 **Example:**
628
629 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
630
631
632 **Downlink Command to set Trigger Condition**
633
634 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
635
636 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
637
638 AA: Code for this downlink Command:
639
640 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
641
642 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
643
644 yy2 yy2: AC1 or AV1 high limit.
645
646 yy3 yy3: AC2 or AV2 low limit.
647
648 Yy4 yy4: AC2 or AV2 high limit.
649
650 **Example1**: AA 00 13 88 00 00 00 00 00 00
651
652 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
653
654 **Example2**: AA 02 01 00
655
656 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
657
658 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
659
660 MOD6 Payload : total 11 bytes payload
661
662 [[image:image-20220524085923-1.png]]
663
664 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
665
666 [[image:image-20220524090106-2.png]]
667
668 * Each bits shows if the corresponding trigger has been configured.
669
670 **Example:**
671
672 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
673
674
675 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
676
677 [[image:image-20220524090249-3.png]]
678
679 * Each bits shows which status has been trigger on this uplink.
680
681 **Example:**
682
683 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
684
685
686 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
687
688 [[image:image-20220524090456-4.png]]
689
690 * Each bits shows which status has been trigger on this uplink.
691
692 **Example:**
693
694 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
695
696 00000101: Means both DI1 and DI2 trigger are enabled.
697
698
699 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
700
701 Downlink command to poll MOD6 status:
702
703 **AB 06**
704
705 When device got this command, it will send the MOD6 payload.
706
707
708 === 3.3.7 Payload Decoder ===
709
710 (((
711 **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/]]
712
713
714 )))
715
716 == 3.4 ​Configure LT via AT or Downlink ==
717
718 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
719
720 (((
721 There are two kinds of Commands:
722 )))
723
724 * (% style="color:#4f81bd" %)**Common Commands**(%%): They should be available for each sensor, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: http:~/~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands
725
726 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
727
728 === 3.4.1 Common Commands ===
729
730 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]]
731
732
733 === 3.4.2 Sensor related commands ===
734
735 ==== 3.4.2.1 Set Transmit Interval ====
736
737 Set device uplink interval.
738
739 * AT Command:
740
741 (% class="box infomessage" %)
742 (((
743 **AT+TDC=N **
744 )))
745
746 **Example: **AT+TDC=30000. Means set interval to 30 seconds
747
748 * Downlink Payload (prefix 0x01):
749
750 (% class="box infomessage" %)
751 (((
752 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
753 )))
754
755
756 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
757
758 Set work mode.
759
760 * AT Command:
761
762 (% class="box infomessage" %)
763 (((
764 **AT+MOD=N  **
765 )))
766
767 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
768
769 * Downlink Payload (prefix 0x0A):
770
771 (% class="box infomessage" %)
772 (((
773 **0x0A aa     ~/~/ Same as AT+MOD=aa**
774 )))
775
776
777 ==== 3.4.2.3 Poll an uplink ====
778
779 * AT Command:
780
781 There is no AT Command to poll uplink
782
783 * Downlink Payload (prefix 0x08):
784
785 (% class="box infomessage" %)
786 (((
787 **0x08 FF     ~/~/ Poll an uplink,**
788 )))
789
790 **Example**: 0x08FF, ask device to send an Uplink
791
792
793 ==== 3.4.2.4 Enable Trigger Mode ====
794
795 Use of trigger mode, please check [[ADDMOD6>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
796
797 * AT Command:
798
799 (% class="box infomessage" %)
800 (((
801 **AT+ADDMOD6=1 or 0**
802 )))
803
804 1: Enable Trigger Mode
805
806 0: Disable Trigger Mode
807
808 * Downlink Payload (prefix 0x0A 06):
809
810 (% class="box infomessage" %)
811 (((
812 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
813 )))
814
815
816 ==== 3.4.2.5 Poll trigger settings ====
817
818 Poll trigger settings,
819
820 * AT Command:
821
822 There is no AT Command for this feature.
823
824 * Downlink Payload (prefix 0x AB 06):
825
826 (% class="box infomessage" %)
827 (((
828 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
829 )))
830
831
832 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
833
834 Enable Disable DI1/DI2/DI2 as trigger,
835
836 * AT Command:
837
838 (% class="box infomessage" %)
839 (((
840 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
841 )))
842
843 **Example:**
844
845 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
846
847 * Downlink Payload (prefix 0xAA 02):
848
849 (% class="box infomessage" %)
850 (((
851 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
852 )))
853
854
855 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
856
857 Set DI1 or DI3(for LT-33222-L) trigger.
858
859 * AT Command:
860
861 (% class="box infomessage" %)
862 (((
863 **AT+TRIG1=a,b**
864 )))
865
866 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
867
868 b : delay timing.
869
870 **Example:**
871
872 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
873
874 * Downlink Payload (prefix 0x09 01 ):
875
876 (% class="box infomessage" %)
877 (((
878 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
879 )))
880
881
882 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
883
884 Set DI2 trigger.
885
886 * AT Command:
887
888 (% class="box infomessage" %)
889 (((
890 **AT+TRIG2=a,b**
891 )))
892
893 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
894
895 b : delay timing.
896
897 **Example:**
898
899 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
900
901 * Downlink Payload (prefix 0x09 02 ):
902
903 (% class="box infomessage" %)
904 (((
905 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
906 )))
907
908
909 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
910
911 Set current trigger , base on AC port. See [[trigger mode>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
912
913 * AT Command:
914
915 (% class="box infomessage" %)
916 (((
917 **AT+ACLIM. **
918 )))
919
920 * Downlink Payload (prefix 0xAA 01 ):
921
922 (% class="box infomessage" %)
923 (((
924 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]**
925 )))
926
927
928 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
929
930 Set current trigger , base on AV port. See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]
931
932 * AT Command:
933
934 (% class="box infomessage" %)
935 (((
936 **AT+AVLIM. See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]]**
937 )))
938
939 * Downlink Payload (prefix 0xAA 00 ):
940
941 (% class="box infomessage" %)
942 (((
943 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29]] **
944 )))
945
946
947 ==== 3.4.2.11 Trigger – Set minimum interval ====
948
949 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
950
951 * AT Command:
952
953 (% class="box infomessage" %)
954 (((
955 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
956 )))
957
958 * Downlink Payload (prefix 0xAC ):
959
960 (% class="box infomessage" %)
961 (((
962 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
963 )))
964
965
966 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
967
968 * AT Command:
969
970 There is no AT Command to control Digital Output
971
972 * Downlink Payload (prefix 0x02):
973
974 (% class="box infomessage" %)
975 (((
976 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
977 )))
978
979 (((
980 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
981 )))
982
983 (((
984 01: Low,  00: High ,  11: No action
985 )))
986
987 [[image:image-20220524092754-5.png]]
988
989 (((
990 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
991 )))
992
993 (((
994 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
995 )))
996
997
998 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
999
1000 * AT Command:
1001
1002 There is no AT Command to control Digital Output
1003
1004 * Downlink Payload (prefix 0xA9):
1005
1006 (% class="box infomessage" %)
1007 (((
1008 (((
1009 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1010 )))
1011 )))
1012
1013 This is to control the digital output time of DO pin. Include four bytes:
1014
1015 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1016
1017 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1018
1019 01: DO pins will change back to original state after timeout.
1020
1021 00: DO pins will change to an inverter state after timeout 
1022
1023 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1024
1025 [[image:image-20220524093238-6.png]]
1026
1027 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1028
1029 [[image:image-20220524093328-7.png]]
1030
1031 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1032
1033 [[image:image-20220524093351-8.png]]
1034
1035 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1036
1037 Latching time. Unit: ms
1038
1039 Device will upload a packet if downlink code executes successfully.
1040
1041 **Example payload:**
1042
1043 **~1. A9 01 01 01 01 07 D0**
1044
1045 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1046
1047 **2. A9 01 00 01 11 07 D0**
1048
1049 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1050
1051 **3. A9 00 00 00 00 07 D0**
1052
1053 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1054
1055 **4. A9 00 11 01 00 07 D0**
1056
1057 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
1058
1059
1060 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1061
1062 * AT Command:
1063
1064 There is no AT Command to control Relay Output
1065
1066 * Downlink Payload (prefix 0x03):
1067
1068 (% class="box infomessage" %)
1069 (((
1070 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1071 )))
1072
1073 (((
1074 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1075 )))
1076
1077 (((
1078 01: Close ,  00: Open , 11: No action
1079 )))
1080
1081 (((
1082 [[image:image-20220524093724-9.png]]
1083 )))
1084
1085 Device will upload a packet if downlink code executes successfully.
1086
1087
1088 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1089
1090 * AT Command:
1091
1092 There is no AT Command to control Relay Output
1093
1094 * Downlink Payload (prefix 0x05):
1095
1096 (% class="box infomessage" %)
1097 (((
1098 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1099 )))
1100
1101 This is to control the relay output time of relay. Include four bytes:
1102
1103 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1104
1105 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1106
1107 01: Relays will change back to original state after timeout.
1108
1109 00: Relays will change to an inverter state after timeout
1110
1111 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1112
1113 [[image:image-20220524093831-10.png]]
1114
1115 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1116
1117 Device will upload a packet if downlink code executes successfully.
1118
1119 **Example payload:**
1120
1121 **~1. 05 01 11 07 D0**
1122
1123 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1124
1125 **2. 05 01 10 07 D0**
1126
1127 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1128
1129 **3. 05 00 01 07 D0**
1130
1131 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1132
1133 **4. 05 00 00 07 D0**
1134
1135 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1136
1137
1138 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1139
1140 When voltage exceed the threshold, count. Feature see [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]
1141
1142 * AT Command:
1143
1144 (% class="box infomessage" %)
1145 (((
1146 **AT+VOLMAX    ~/~/ See [[MOD4>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting]]**
1147 )))
1148
1149 * Downlink Payload (prefix 0xA5):
1150
1151 (% class="box infomessage" %)
1152 (((
1153 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1154 )))
1155
1156
1157 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1158
1159 * AT Command:
1160
1161 (% class="box infomessage" %)
1162 (((
1163 **AT+SETCNT=aa,(bb cc dd ee) **
1164 )))
1165
1166 aa: 1: Set count1,
1167
1168 2: Set count2,
1169
1170 3: Set AV1 count
1171
1172 Bb cc dd ee: number to be set
1173
1174 * Downlink Payload (prefix 0xA8):
1175
1176 (% class="box infomessage" %)
1177 (((
1178 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1179 )))
1180
1181
1182 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1183
1184 Clear counting for counting mode
1185
1186 * AT Command:
1187
1188 (% class="box infomessage" %)
1189 (((
1190 **AT+CLRCOUNT ~/~/ clear all counting**
1191 )))
1192
1193 * Downlink Payload (prefix 0xA6):
1194
1195 (% class="box infomessage" %)
1196 (((
1197 **0x A6 01     ~/~/ clear all counting,**
1198 )))
1199
1200
1201 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1202
1203 * AT Command:
1204
1205 (% class="box infomessage" %)
1206 (((
1207 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1208 )))
1209
1210 * Downlink Payload (prefix 0xA7):
1211
1212 (% class="box infomessage" %)
1213 (((
1214 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1215 )))
1216
1217 (((
1218 range: aa bb cc:0 to 16777215,  (unit:second)
1219
1220
1221 )))
1222
1223 == 3.5 Integrate with Mydevice ==
1224
1225 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:
1226
1227 (((
1228 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1229 )))
1230
1231 (((
1232 **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:
1233 )))
1234
1235 [[image:1653356737703-362.png||height="232" width="732"]]
1236
1237 [[image:image-20220524094641-11.png||height="390" width="723"]]
1238
1239 [[image:image-20220524094641-12.png||height="402" width="718"]]
1240
1241 **Step 3**: Create an account or log in Mydevices.
1242
1243 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1244
1245 Search under The things network
1246
1247 [[image:1653356838789-523.png||height="337" width="740"]]
1248
1249
1250 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1251
1252 [[image:image-20220524094909-1.png||height="335" width="729"]]
1253
1254 [[image:image-20220524094909-2.png||height="337" width="729"]]
1255
1256 [[image:image-20220524094909-3.png||height="338" width="727"]]
1257
1258 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1259
1260 [[image:image-20220524094909-5.png||height="341" width="734"]]
1261
1262
1263 == 3.6 Interface Detail ==
1264
1265 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1266
1267 Support NPN Type sensor
1268
1269 [[image:1653356991268-289.png]]
1270
1271
1272 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1273
1274 (((
1275 The DI port of LT-22222-L can support NPN or PNP output sensor.
1276 )))
1277
1278 (((
1279 (((
1280 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
1281 )))
1282 )))
1283
1284 [[image:1653357170703-587.png]]
1285
1286 (((
1287 (((
1288 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1289 )))
1290 )))
1291
1292 (((
1293
1294 )))
1295
1296 (((
1297 **Example1**: Connect to a Low active sensor.
1298 )))
1299
1300 (((
1301 This type of sensor will output a low signal GND when active.
1302 )))
1303
1304 * (((
1305 Connect sensor’s output to DI1-
1306 )))
1307 * (((
1308 Connect sensor’s VCC to DI1+.
1309 )))
1310
1311 (((
1312 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1313 )))
1314
1315 (((
1316 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1317 )))
1318
1319 (((
1320 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.
1321 )))
1322
1323 (((
1324
1325 )))
1326
1327 (((
1328 **Example2**: Connect to a High active sensor.
1329 )))
1330
1331 (((
1332 This type of sensor will output a high signal (example 24v) when active.
1333 )))
1334
1335 * (((
1336 Connect sensor’s output to DI1+
1337 )))
1338 * (((
1339 Connect sensor’s GND DI1-.
1340 )))
1341
1342 (((
1343 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1344 )))
1345
1346 (((
1347 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1348 )))
1349
1350 (((
1351 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.
1352 )))
1353
1354 (((
1355
1356 )))
1357
1358 (((
1359 **Example3**: Connect to a 220v high active sensor.
1360 )))
1361
1362 (((
1363 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1364 )))
1365
1366 * (((
1367 Connect sensor’s output to DI1+ with a serial 50K resistor
1368 )))
1369 * (((
1370 Connect sensor’s GND DI1-.
1371 )))
1372
1373 (((
1374 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1375 )))
1376
1377 (((
1378 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1379 )))
1380
1381 (((
1382 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.
1383 )))
1384
1385
1386 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1387
1388 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1389
1390 [[image:1653357531600-905.png]]
1391
1392
1393 === 3.6.4 Analog Input Interface ===
1394
1395 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:
1396
1397 **AC2 = (IN2 voltage )/12**
1398
1399 [[image:1653357592296-182.png]]
1400
1401 Example to connect a 4~~20mA sensor
1402
1403 We take the wind speed sensor as an example for reference only.
1404
1405 Specifications of the wind speed sensor:
1406
1407 Red:12~~24v
1408
1409 Yellow:4~~20mA
1410
1411 Black:GND
1412
1413
1414 Connection diagram:
1415
1416 [[image:1653357640609-758.png]]
1417
1418 [[image:1653357648330-671.png||height="155" width="733"]]
1419
1420
1421 === 3.6.5 Relay Output ===
1422
1423 (((
1424 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:
1425 )))
1426
1427 [[image:image-20220524100215-9.png]]
1428
1429 [[image:image-20220524100215-10.png||height="382" width="723"]]
1430
1431
1432 == 3.7 LEDs Indicators ==
1433
1434 [[image:image-20220524100748-11.png]]
1435
1436
1437 = 4. Use AT Command =
1438
1439 == 4.1 Access AT Command ==
1440
1441 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.
1442
1443 [[image:1653358238933-385.png]]
1444
1445 (((
1446 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:
1447 )))
1448
1449 [[image:1653358355238-883.png]]
1450
1451 (((
1452 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/]]
1453 )))
1454
1455 (((
1456 AT+<CMD>?        : Help on <CMD>
1457 )))
1458
1459 (((
1460 AT+<CMD>         : Run <CMD>
1461 )))
1462
1463 (((
1464 AT+<CMD>=<value> : Set the value
1465 )))
1466
1467 (((
1468 AT+<CMD>=?       : Get the value
1469 )))
1470
1471 (((
1472 ATZ: Trig a reset of the MCU
1473 )))
1474
1475 (((
1476 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1477 )))
1478
1479 (((
1480 AT+DEUI: Get or Set the Device EUI
1481 )))
1482
1483 (((
1484 AT+DADDR: Get or Set the Device Address
1485 )))
1486
1487 (((
1488 AT+APPKEY: Get or Set the Application Key
1489 )))
1490
1491 (((
1492 AT+NWKSKEY: Get or Set the Network Session Key
1493 )))
1494
1495 (((
1496 AT+APPSKEY: Get or Set the Application Session Key
1497 )))
1498
1499 (((
1500 AT+APPEUI: Get or Set the Application EUI
1501 )))
1502
1503 (((
1504 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1505 )))
1506
1507 (((
1508 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1509 )))
1510
1511 (((
1512 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1513 )))
1514
1515 (((
1516 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1517 )))
1518
1519 (((
1520 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1521 )))
1522
1523 (((
1524 AT+RX2FQ: Get or Set the Rx2 window frequency
1525 )))
1526
1527 (((
1528 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1529 )))
1530
1531 (((
1532 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1533 )))
1534
1535 (((
1536 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1537 )))
1538
1539 (((
1540 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1541 )))
1542
1543 (((
1544 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1545 )))
1546
1547 (((
1548 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1549 )))
1550
1551 (((
1552 AT+NWKID: Get or Set the Network ID
1553 )))
1554
1555 (((
1556 AT+FCU: Get or Set the Frame Counter Uplink
1557 )))
1558
1559 (((
1560 AT+FCD: Get or Set the Frame Counter Downlink
1561 )))
1562
1563 (((
1564 AT+CLASS: Get or Set the Device Class
1565 )))
1566
1567 (((
1568 AT+JOIN: Join network
1569 )))
1570
1571 (((
1572 AT+NJS: Get OTAA Join Status
1573 )))
1574
1575 (((
1576 AT+SENDB: Send hexadecimal data along with the application port
1577 )))
1578
1579 (((
1580 AT+SEND: Send text data along with the application port
1581 )))
1582
1583 (((
1584 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1585 )))
1586
1587 (((
1588 AT+RECV: Print last received data in raw format
1589 )))
1590
1591 (((
1592 AT+VER: Get current image version and Frequency Band
1593 )))
1594
1595 (((
1596 AT+CFM: Get or Set the confirmation mode (0-1)
1597 )))
1598
1599 (((
1600 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1601 )))
1602
1603 (((
1604 AT+SNR: Get the SNR of the last received packet
1605 )))
1606
1607 (((
1608 AT+RSSI: Get the RSSI of the last received packet
1609 )))
1610
1611 (((
1612 AT+TDC: Get or set the application data transmission interval in ms
1613 )))
1614
1615 (((
1616 AT+PORT: Get or set the application port
1617 )))
1618
1619 (((
1620 AT+DISAT: Disable AT commands
1621 )))
1622
1623 (((
1624 AT+PWORD: Set password, max 9 digits
1625 )))
1626
1627 (((
1628 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1629 )))
1630
1631 (((
1632 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1633 )))
1634
1635 (((
1636 AT+CFG: Print all settings
1637
1638
1639 )))
1640
1641 == 4.2 Common AT Command Sequence ==
1642
1643 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1644
1645 (((
1646 If device has not joined network yet:
1647 )))
1648
1649 (((
1650 (% style="background-color:#dcdcdc" %)123456
1651 )))
1652
1653 (((
1654 (% style="background-color:#dcdcdc" %)AT+FDR
1655 )))
1656
1657 (((
1658 (% style="background-color:#dcdcdc" %)123456
1659 )))
1660
1661 (((
1662 (% style="background-color:#dcdcdc" %)AT+NJM=0
1663 )))
1664
1665 (((
1666 (% style="background-color:#dcdcdc" %)ATZ
1667 )))
1668
1669
1670 (((
1671 If device already joined network:
1672 )))
1673
1674 (((
1675 (% style="background-color:#dcdcdc" %)AT+NJM=0
1676 )))
1677
1678 (((
1679 (% style="background-color:#dcdcdc" %)ATZ
1680
1681
1682 )))
1683
1684 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1685
1686 (((
1687 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1688 )))
1689
1690 (((
1691 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1692 )))
1693
1694 (((
1695 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1696 )))
1697
1698 (((
1699 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1700 )))
1701
1702 (((
1703 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1704 )))
1705
1706 (((
1707 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1708 )))
1709
1710 (((
1711 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1712 )))
1713
1714 (((
1715 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1716 )))
1717
1718 (((
1719 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1720 )))
1721
1722 (((
1723 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1724 )))
1725
1726 (((
1727 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1728 )))
1729
1730 (((
1731 (% 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.
1732 )))
1733
1734 (((
1735 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1736 )))
1737
1738 (((
1739 (% style="color:red" %)**Note:**
1740 )))
1741
1742 (((
1743 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1744 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1745 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.
1746 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
1747 )))
1748
1749 (((
1750 [[image:1653359097980-169.png||height="188" width="729"]]
1751 )))
1752
1753 (((
1754
1755 )))
1756
1757 === 4.2.3 Change to Class A ===
1758
1759 If sensor JOINED
1760 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1761 ATZ
1762
1763
1764 = 5. FAQ =
1765
1766 == 5.1 How to upgrade the image? ==
1767
1768 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1769
1770 * Support new features
1771 * For bug fix
1772 * Change LoRaWAN bands.
1773 Below shows the hardware connection for how to upload an image to the LT:
1774 * [[image:1653359603330-121.png]]
1775
1776 (((
1777 **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]].
1778 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1779 **Step3: **Open flashloader; choose the correct COM port to update.
1780 **For LT-22222-L**:
1781 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.
1782 )))
1783
1784 [[image:image-20220524103407-12.png]]
1785
1786 [[image:image-20220524103429-13.png]]
1787
1788 [[image:image-20220524104033-15.png]]
1789
1790 (% 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:
1791
1792 [[image:1653360054704-518.png||height="186" width="745"]]
1793
1794
1795 (((
1796 (((
1797 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1798 )))
1799 )))
1800
1801 (((
1802 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1803
1804
1805 )))
1806
1807 (((
1808 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1809 )))
1810
1811 (((
1812 (((
1813 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1814 )))
1815 )))
1816
1817 (((
1818 (((
1819 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1820 )))
1821 )))
1822
1823 (((
1824 (% 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.
1825 )))
1826
1827 (((
1828 [[image:1653360231087-571.png||height="401" width="727"]]
1829 )))
1830
1831 (((
1832 (% 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.
1833 )))
1834
1835 (((
1836 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1837 )))
1838
1839 (((
1840 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1841 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1842 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1843 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1844 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1845 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1846 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1847 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1848 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1849 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1850 )))
1851
1852 (((
1853 As shown in below:
1854 )))
1855
1856 [[image:1653360498588-932.png||height="485" width="726"]]
1857
1858
1859 == 5.4 Can I see counting event in Serial? ==
1860
1861 (((
1862 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.
1863
1864
1865 )))
1866
1867 (((
1868 = 6. Trouble Shooting =
1869 )))
1870
1871 (((
1872 (((
1873 == 6.1 Downlink doesn’t work, how to solve it? ==
1874 )))
1875 )))
1876
1877 (((
1878 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1879
1880
1881 )))
1882
1883 (((
1884 == 6.2 Have trouble to upload image. ==
1885 )))
1886
1887 (((
1888 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1889 )))
1890
1891 (((
1892
1893 )))
1894
1895 (((
1896 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1897 )))
1898
1899 (((
1900 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1901 )))
1902
1903 (((
1904
1905 )))
1906
1907 (((
1908 = 7. Order Info =
1909 )))
1910
1911 (((
1912 (((
1913 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1914 )))
1915 )))
1916
1917 (((
1918 (((
1919 (% style="color:#4f81bd" %)**XXX:**
1920 )))
1921 )))
1922
1923 (((
1924 * (((
1925 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1926 )))
1927 )))
1928
1929 (((
1930 * (((
1931 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1932 )))
1933 )))
1934
1935 (((
1936 * (((
1937 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1938 )))
1939 )))
1940
1941 (((
1942 * (((
1943 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1944 )))
1945 )))
1946
1947 (((
1948 * (((
1949 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1950 )))
1951 )))
1952
1953 (((
1954 * (((
1955 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1956 )))
1957 )))
1958
1959 (((
1960 * (((
1961 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1962 )))
1963 )))
1964
1965 (((
1966 * (((
1967 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1968 )))
1969 )))
1970
1971 (((
1972 * (((
1973 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1974
1975
1976 )))
1977
1978 = 8. Packing Info =
1979 )))
1980
1981 (((
1982 (((
1983 **Package Includes**:
1984 )))
1985 )))
1986
1987 (((
1988 (((
1989 * LT-22222-L I/O Controller x 1
1990 * Stick Antenna for LoRa RF part x 1
1991 * Bracket for controller x1
1992 * Program cable x 1
1993 )))
1994 )))
1995
1996 (((
1997 (((
1998 **Dimension and weight**:
1999 )))
2000 )))
2001
2002 (((
2003 (((
2004 * Device Size: 13.5 x 7 x 3 cm
2005 * Device Weight: 105g
2006 * Package Size / pcs : 14.5 x 8 x 5 cm
2007 * Weight / pcs : 170g
2008
2009
2010 )))
2011 )))
2012
2013 (((
2014 = 9. Support =
2015 )))
2016
2017 * (((
2018 (((
2019 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.
2020 )))
2021 )))
2022 * (((
2023 (((
2024 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
2025 )))
2026 )))
2027
2028 (((
2029 (((
2030 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2031
2032
2033 )))
2034
2035 (((
2036 = 10. Reference​​​​​ =
2037
2038 * Product Page:
2039
2040 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]]
2041
2042 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2043 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2044 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2045 )))
2046 )))

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