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Version 77.75 by Xiaoling on 2022/06/10 09:23
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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 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
279
280 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
281
282 [[image:image-20220523174024-3.png]]
283
284 (((
285 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
286 )))
287
288 [[image:image-20220523174254-4.png]]
289
290 * RO is for relay. ROx=1 : close，ROx=0 always open.
291 * DI is for digital input. DIx=1: high or float, DIx=0: low.
292 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
293
294 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
295
296 For example if payload is: [[image:image-20220523175847-2.png]]
297
298 **The value for the interface is:  **
299
300 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
301
302 AVI2 channel voltage is 0x04AC/1000=1.196V
303
304 ACI1 channel current is 0x1310/1000=4.880mA
305
306 ACI2 channel current is 0x1300/1000=4.864mA
307
308 The last byte 0xAA= 10101010(B) means
309
310 * [1] RO1 relay channel is close and the RO1 LED is ON.
311 * [0] RO2 relay channel is open and RO2 LED is OFF;
312
313 **LT22222-L:**
314
315 * [1] DI2 channel is high input and DI2 LED is ON;
316 * [0] DI1 channel is low input;
317
318 * [0] DO3 channel output state
319 ** DO3 is float in case no load between DO3 and V+.;
320 ** DO3 is high in case there is load between DO3 and V+.
321 ** DO3 LED is off in both case
322 * [1] DO2 channel output is low and DO2 LED is ON.
323 * [0] DO1 channel output state
324 ** DO1 is float in case no load between DO1 and V+.;
325 ** DO1 is high in case there is load between DO1 and V+.
326 ** DO1 LED is off in both case
327
328 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
329
330 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
331
332 (((
333 Total : 11 bytes payload
334 )))
335
336 [[image:image-20220523180452-3.png]]
337
338 (((
339 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
340 )))
341
342 [[image:image-20220523180506-4.png]]
343
344 * RO is for relay. ROx=1 : close，ROx=0 always open.
345 * FIRST: Indicate this is the first packet after join network.
346 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
347
348 (((
349 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
350 )))
351
352 (((
353 **To use counting mode, please run:**
354 )))
355
356 (% class="box infomessage" %)
357 (((
358 (((
359 **AT+MOD=2**
360 )))
361 )))
362
363 (% class="box infomessage" %)
364 (((
365 (((
366 **ATZ**
367 )))
368 )))
369
370 (((
371 (% style="color:#4f81bd" %)**AT Commands for counting:**
372 )))
373
374 (((
375 **For LT22222-L:**
376 )))
377
378 (% class="box infomessage" %)
379 (((
380 (((
381 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
382 )))
383 )))
384
385 (% class="box infomessage" %)
386 (((
387 (((
388 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
389 )))
390 )))
391
392 (% class="box infomessage" %)
393 (((
394 (((
395 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
396 )))
397 )))
398
399 (% class="box infomessage" %)
400 (((
401 (((
402 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
403 )))
404 )))
405
406 (% class="box infomessage" %)
407 (((
408 (((
409 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
410 )))
411 )))
412
413 (% class="box infomessage" %)
414 (((
415 (((
416 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
417 )))
418 )))
419
420
421
422 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
423
424 **LT22222-L**: This mode the DI1 is used as a counting pin.
425
426 [[image:image-20220523181246-5.png]]
427
428 (((
429 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
430 )))
431
432 [[image:image-20220523181301-6.png]]
433
434 * RO is for relay. ROx=1 : close，ROx=0 always open.
435 * FIRST: Indicate this is the first packet after join network.
436 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
437
438 (((
439 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
440 )))
441
442 (((
443 **To use counting mode, please run:**
444 )))
445
446 (% class="box infomessage" %)
447 (((
448 (((
449 **AT+MOD=3**
450 )))
451 )))
452
453 (% class="box infomessage" %)
454 (((
455 (((
456 **ATZ**
457 )))
458 )))
459
460 (((
461 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
462
463
464 )))
465
466
467
468 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
469
470 **LT22222-L**: This mode the DI1 is used as a counting pin.
471
472 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.
473
474 [[image:image-20220523181903-8.png]]
475
476 (((
477 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
478 )))
479
480 [[image:image-20220523181727-7.png]]
481
482 * RO is for relay. ROx=1 : close，ROx=0 always open.
483 * FIRST: Indicate this is the first packet after join network.
484 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
485
486 (((
487 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
488 )))
489
490 (((
491 **To use this mode, please run:**
492 )))
493
494 (% class="box infomessage" %)
495 (((
496 (((
497 **AT+MOD=4**
498 )))
499 )))
500
501 (% class="box infomessage" %)
502 (((
503 (((
504 **ATZ**
505 )))
506 )))
507
508 (((
509
510 )))
511
512 (((
513 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
514 )))
515
516 (((
517 **Plus below command for AVI1 Counting:**
518 )))
519
520 (% class="box infomessage" %)
521 (((
522 (((
523 **AT+SETCNT=3,60   (set AVI Count to 60)**
524 )))
525 )))
526
527 (% class="box infomessage" %)
528 (((
529 (((
530 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
531 )))
532 )))
533
534 (% class="box infomessage" %)
535 (((
536 (((
537 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
538 )))
539 )))
540
541 (% class="box infomessage" %)
542 (((
543 (((
544 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
545 )))
546 )))
547
548
549
550 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
551
552 **LT22222-L**: This mode the DI1 is used as a counting pin.
553
554 [[image:image-20220523182334-9.png]]
555
556 (((
557 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
558 )))
559
560 * RO is for relay. ROx=1 : close，ROx=0 always open.
561 * FIRST: Indicate this is the first packet after join network.
562 * (((
563 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
564 )))
565
566 (((
567 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
568 )))
569
570 (((
571 **To use this mode, please run:**
572 )))
573
574 (% class="box infomessage" %)
575 (((
576 (((
577 **AT+MOD=5**
578 )))
579 )))
580
581 (% class="box infomessage" %)
582 (((
583 (((
584 **ATZ**
585 )))
586 )))
587
588 (((
589 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
590
591
592 )))
593
594
595
596 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
597
598 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
599
600 For example, if user has configured below commands:
601
602 * **AT+MOD=1 ** **~-~->** The normal working mode
603 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
604
605 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
606
607 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
608 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.**
609
610 **AT Command to set Trigger Condition**:
611
612 (% style="color:#4f81bd" %)**Trigger base on voltage**:
613
614 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
615
616 **Example:**
617
618 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)
619
620 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
621
622
623 (% style="color:#4f81bd" %)**Trigger base on current**:
624
625 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
626
627 **Example:**
628
629 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
630
631
632 (% style="color:#4f81bd" %)**Trigger base on DI status**:
633
634 DI status trigger Flag.
635
636 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
637
638 **Example:**
639
640 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
641
642
643 **Downlink Command to set Trigger Condition**
644
645 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
646
647 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
648
649 AA: Code for this downlink Command:
650
651 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
652
653 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
654
655 yy2 yy2: AC1 or AV1 high limit.
656
657 yy3 yy3: AC2 or AV2 low limit.
658
659 Yy4 yy4: AC2 or AV2 high limit.
660
661
662 **Example1**: AA 00 13 88 00 00 00 00 00 00
663
664 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
665
666
667 **Example2**: AA 02 01 00
668
669 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
670
671
672 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
673
674 MOD6 Payload : total 11 bytes payload
675
676 [[image:image-20220524085923-1.png]]
677
678
679 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
680
681 [[image:image-20220524090106-2.png]]
682
683 * Each bits shows if the corresponding trigger has been configured.
684
685
686 **Example:**
687
688 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
689
690
691 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
692
693 [[image:image-20220524090249-3.png]]
694
695 * Each bits shows which status has been trigger on this uplink.
696
697
698 **Example:**
699
700 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
701
702
703 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
704
705 [[image:image-20220524090456-4.png]]
706
707 * Each bits shows which status has been trigger on this uplink.
708
709
710 **Example:**
711
712 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
713
714 00000101: Means both DI1 and DI2 trigger are enabled.
715
716
717 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
718
719 Downlink command to poll MOD6 status:
720
721 **AB 06**
722
723 When device got this command, it will send the MOD6 payload.
724
725
726
727 === 3.3.7 Payload Decoder ===
728
729 (((
730 **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/]]
731
732
733 )))
734
735
736
737 == 3.4 ​Configure LT via AT or Downlink ==
738
739 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
740
741 (((
742 There are two kinds of Commands:
743 )))
744
745 * (% 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]]
746
747 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
748
749
750
751 === 3.4.1 Common Commands ===
752
753 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]]
754
755
756
757 === 3.4.2 Sensor related commands ===
758
759 ==== 3.4.2.1 Set Transmit Interval ====
760
761 Set device uplink interval.
762
763 * AT Command:
764
765 (% class="box infomessage" %)
766 (((
767 **AT+TDC=N **
768 )))
769
770 **Example: **AT+TDC=30000. Means set interval to 30 seconds
771
772
773 * Downlink Payload (prefix 0x01):
774
775 (% class="box infomessage" %)
776 (((
777 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
778 )))
779
780
781
782 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
783
784 Set work mode.
785
786 * AT Command:
787
788 (% class="box infomessage" %)
789 (((
790 **AT+MOD=N  **
791 )))
792
793 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
794
795
796 * Downlink Payload (prefix 0x0A):
797
798 (% class="box infomessage" %)
799 (((
800 **0x0A aa     ~/~/ Same as AT+MOD=aa**
801 )))
802
803
804
805 ==== 3.4.2.3 Poll an uplink ====
806
807 * AT Command:
808
809 There is no AT Command to poll uplink
810
811
812 * Downlink Payload (prefix 0x08):
813
814 (% class="box infomessage" %)
815 (((
816 **0x08 FF     ~/~/ Poll an uplink,**
817 )))
818
819 **Example**: 0x08FF, ask device to send an Uplink
820
821
822
823 ==== 3.4.2.4 Enable Trigger Mode ====
824
825 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
826
827 * AT Command:
828
829 (% class="box infomessage" %)
830 (((
831 **AT+ADDMOD6=1 or 0**
832 )))
833
834 1: Enable Trigger Mode
835
836 0: Disable Trigger Mode
837
838
839 * Downlink Payload (prefix 0x0A 06):
840
841 (% class="box infomessage" %)
842 (((
843 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
844 )))
845
846
847
848 ==== 3.4.2.5 Poll trigger settings ====
849
850 Poll trigger settings,
851
852 * AT Command:
853
854 There is no AT Command for this feature.
855
856
857 * Downlink Payload (prefix 0x AB 06):
858
859 (% class="box infomessage" %)
860 (((
861 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
862 )))
863
864
865
866 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
867
868 Enable Disable DI1/DI2/DI2 as trigger,
869
870 * AT Command:
871
872 (% class="box infomessage" %)
873 (((
874 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
875 )))
876
877
878 **Example:**
879
880 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
881
882 * Downlink Payload (prefix 0xAA 02):
883
884 (% class="box infomessage" %)
885 (((
886 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
887 )))
888
889
890
891 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
892
893 Set DI1 or DI3(for LT-33222-L) trigger.
894
895 * AT Command:
896
897 (% class="box infomessage" %)
898 (((
899 **AT+TRIG1=a,b**
900 )))
901
902 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
903
904 b : delay timing.
905
906
907 **Example:**
908
909 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
910
911
912 * Downlink Payload (prefix 0x09 01 ):
913
914 (% class="box infomessage" %)
915 (((
916 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
917 )))
918
919
920
921 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
922
923 Set DI2 trigger.
924
925 * AT Command:
926
927 (% class="box infomessage" %)
928 (((
929 **AT+TRIG2=a,b**
930 )))
931
932 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
933
934 b : delay timing.
935
936
937 **Example:**
938
939 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
940
941
942 * Downlink Payload (prefix 0x09 02 ):
943
944 (% class="box infomessage" %)
945 (((
946 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
947 )))
948
949
950
951 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
952
953 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
954
955 * AT Command:
956
957 (% class="box infomessage" %)
958 (((
959 **AT+ACLIM. **
960 )))
961
962
963 * Downlink Payload (prefix 0xAA 01 ):
964
965 (% class="box infomessage" %)
966 (((
967 **0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
968 )))
969
970
971
972 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
973
974 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
975
976 * AT Command:
977
978 (% class="box infomessage" %)
979 (((
980 **AT+AVLIM. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
981 )))
982
983
984 * Downlink Payload (prefix 0xAA 00 ):
985
986 (% class="box infomessage" %)
987 (((
988 **0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]] **
989 )))
990
991
992
993 ==== 3.4.2.11 Trigger – Set minimum interval ====
994
995 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
996
997 * AT Command:
998
999 (% class="box infomessage" %)
1000 (((
1001 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
1002 )))
1003
1004
1005 * Downlink Payload (prefix 0xAC ):
1006
1007 (% class="box infomessage" %)
1008 (((
1009 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
1010 )))
1011
1012
1013
1014 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
1015
1016 * AT Command:
1017
1018 There is no AT Command to control Digital Output
1019
1020
1021 * Downlink Payload (prefix 0x02):
1022
1023 (% class="box infomessage" %)
1024 (((
1025 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
1026 )))
1027
1028 (((
1029 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
1030 )))
1031
1032 (((
1033 01: Low,  00: High ,  11: No action
1034 )))
1035
1036 [[image:image-20220524092754-5.png]]
1037
1038 (((
1039 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1040 )))
1041
1042 (((
1043 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
1044 )))
1045
1046
1047
1048 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1049
1050 * AT Command:
1051
1052 There is no AT Command to control Digital Output
1053
1054
1055 * Downlink Payload (prefix 0xA9):
1056
1057 (% class="box infomessage" %)
1058 (((
1059 (((
1060 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1061 )))
1062 )))
1063
1064 This is to control the digital output time of DO pin. Include four bytes:
1065
1066 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1067
1068 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1069
1070 01: DO pins will change back to original state after timeout.
1071
1072 00: DO pins will change to an inverter state after timeout 
1073
1074
1075 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1076
1077 [[image:image-20220524093238-6.png]]
1078
1079
1080 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1081
1082 [[image:image-20220524093328-7.png]]
1083
1084
1085 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1086
1087 [[image:image-20220524093351-8.png]]
1088
1089
1090 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1091
1092 Latching time. Unit: ms
1093
1094 Device will upload a packet if downlink code executes successfully.
1095
1096
1097 **Example payload:**
1098
1099 **~1. A9 01 01 01 01 07 D0**
1100
1101 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1102
1103 **2. A9 01 00 01 11 07 D0**
1104
1105 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1106
1107 **3. A9 00 00 00 00 07 D0**
1108
1109 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1110
1111 **4. A9 00 11 01 00 07 D0**
1112
1113 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
1114
1115
1116
1117 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1118
1119 * AT Command:
1120
1121 There is no AT Command to control Relay Output
1122
1123
1124 * Downlink Payload (prefix 0x03):
1125
1126 (% class="box infomessage" %)
1127 (((
1128 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1129 )))
1130
1131 (((
1132 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1133 )))
1134
1135 (((
1136 01: Close ,  00: Open , 11: No action
1137 )))
1138
1139 (((
1140 [[image:image-20220524093724-9.png]]
1141 )))
1142
1143 Device will upload a packet if downlink code executes successfully.
1144
1145
1146
1147 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1148
1149 * AT Command:
1150
1151 There is no AT Command to control Relay Output
1152
1153
1154 * Downlink Payload (prefix 0x05):
1155
1156 (% class="box infomessage" %)
1157 (((
1158 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1159 )))
1160
1161 This is to control the relay output time of relay. Include four bytes:
1162
1163 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1164
1165 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1166
1167 01: Relays will change back to original state after timeout.
1168
1169 00: Relays will change to an inverter state after timeout
1170
1171
1172 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1173
1174 [[image:image-20220524093831-10.png]]
1175
1176
1177 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1178
1179 Device will upload a packet if downlink code executes successfully.
1180
1181
1182 **Example payload:**
1183
1184 **~1. 05 01 11 07 D0**
1185
1186 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1187
1188 **2. 05 01 10 07 D0**
1189
1190 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1191
1192 **3. 05 00 01 07 D0**
1193
1194 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1195
1196 **4. 05 00 00 07 D0**
1197
1198 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1199
1200
1201
1202 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1203
1204 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1205
1206 * AT Command:
1207
1208 (% class="box infomessage" %)
1209 (((
1210 **AT+VOLMAX    ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]**
1211 )))
1212
1213
1214 * Downlink Payload (prefix 0xA5):
1215
1216 (% class="box infomessage" %)
1217 (((
1218 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1219 )))
1220
1221
1222
1223 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1224
1225 * AT Command:
1226
1227 (% class="box infomessage" %)
1228 (((
1229 **AT+SETCNT=aa,(bb cc dd ee) **
1230 )))
1231
1232 aa: 1: Set count1,
1233
1234 2: Set count2,
1235
1236 3: Set AV1 count
1237
1238 Bb cc dd ee: number to be set
1239
1240
1241 * Downlink Payload (prefix 0xA8):
1242
1243 (% class="box infomessage" %)
1244 (((
1245 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1246 )))
1247
1248
1249
1250 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1251
1252 Clear counting for counting mode
1253
1254 * AT Command:
1255
1256 (% class="box infomessage" %)
1257 (((
1258 **AT+CLRCOUNT ~/~/ clear all counting**
1259 )))
1260
1261 * Downlink Payload (prefix 0xA6):
1262
1263 (% class="box infomessage" %)
1264 (((
1265 **0x A6 01     ~/~/ clear all counting,**
1266 )))
1267
1268
1269
1270 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1271
1272 * AT Command:
1273
1274 (% class="box infomessage" %)
1275 (((
1276 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1277 )))
1278
1279 * Downlink Payload (prefix 0xA7):
1280
1281 (% class="box infomessage" %)
1282 (((
1283 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1284 )))
1285
1286 (((
1287 range: aa bb cc:0 to 16777215,  (unit:second)
1288
1289
1290 )))
1291
1292
1293 == 3.5 Integrate with Mydevice ==
1294
1295 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:
1296
1297 (((
1298 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1299 )))
1300
1301 (((
1302 (% 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:
1303 )))
1304
1305 [[image:1653356737703-362.png||height="232" width="732"]]
1306
1307 [[image:image-20220524094641-11.png||height="390" width="723"]]
1308
1309
1310 [[image:image-20220524094641-12.png||height="402" width="718"]]
1311
1312
1313 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1314
1315 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1316
1317 Search under The things network
1318
1319 [[image:1653356838789-523.png||height="337" width="740"]]
1320
1321
1322
1323 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1324
1325 [[image:image-20220524094909-1.png||height="335" width="729"]]
1326
1327
1328 [[image:image-20220524094909-2.png||height="337" width="729"]]
1329
1330
1331 [[image:image-20220524094909-3.png||height="338" width="727"]]
1332
1333
1334 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1335
1336
1337 [[image:image-20220524094909-5.png||height="341" width="734"]]
1338
1339
1340
1341 == 3.6 Interface Detail ==
1342
1343 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1344
1345 Support NPN Type sensor
1346
1347 [[image:1653356991268-289.png]]
1348
1349
1350
1351 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1352
1353 (((
1354 The DI port of LT-22222-L can support NPN or PNP output sensor.
1355 )))
1356
1357 (((
1358 (((
1359 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
1360 )))
1361 )))
1362
1363 [[image:1653357170703-587.png]]
1364
1365 (((
1366 (((
1367 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1368 )))
1369 )))
1370
1371 (((
1372
1373 )))
1374
1375 (((
1376 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1377 )))
1378
1379 (((
1380 This type of sensor will output a low signal GND when active.
1381 )))
1382
1383 * (((
1384 Connect sensor’s output to DI1-
1385 )))
1386 * (((
1387 Connect sensor’s VCC to DI1+.
1388 )))
1389
1390 (((
1391 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1392 )))
1393
1394 (((
1395 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1396 )))
1397
1398 (((
1399 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.
1400 )))
1401
1402 (((
1403
1404 )))
1405
1406 (((
1407 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1408 )))
1409
1410 (((
1411 This type of sensor will output a high signal (example 24v) when active.
1412 )))
1413
1414 * (((
1415 Connect sensor’s output to DI1+
1416 )))
1417 * (((
1418 Connect sensor’s GND DI1-.
1419 )))
1420
1421 (((
1422 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1423 )))
1424
1425 (((
1426 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1427 )))
1428
1429 (((
1430 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.
1431 )))
1432
1433 (((
1434
1435 )))
1436
1437 (((
1438 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1439 )))
1440
1441 (((
1442 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1443 )))
1444
1445 * (((
1446 Connect sensor’s output to DI1+ with a serial 50K resistor
1447 )))
1448 * (((
1449 Connect sensor’s GND DI1-.
1450 )))
1451
1452 (((
1453 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1454 )))
1455
1456 (((
1457 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1458 )))
1459
1460 (((
1461 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.
1462 )))
1463
1464
1465
1466 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1467
1468 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1469
1470 [[image:1653357531600-905.png]]
1471
1472
1473
1474 === 3.6.4 Analog Input Interface ===
1475
1476 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:
1477
1478
1479 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1480
1481 [[image:1653357592296-182.png]]
1482
1483 Example to connect a 4~~20mA sensor
1484
1485 We take the wind speed sensor as an example for reference only.
1486
1487
1488 **Specifications of the wind speed sensor:**
1489
1490 Red:  12~~24v
1491
1492 Yellow:  4~~20mA
1493
1494 Black:  GND
1495
1496
1497 **Connection diagram:**
1498
1499 [[image:1653357640609-758.png]]
1500
1501 [[image:1653357648330-671.png||height="155" width="733"]]
1502
1503
1504
1505 === 3.6.5 Relay Output ===
1506
1507 (((
1508 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:
1509 )))
1510
1511 [[image:image-20220524100215-9.png]]
1512
1513 [[image:image-20220524100215-10.png||height="382" width="723"]]
1514
1515
1516
1517 == 3.7 LEDs Indicators ==
1518
1519 [[image:image-20220524100748-11.png]]
1520
1521
1522 = 4. Use AT Command =
1523
1524 == 4.1 Access AT Command ==
1525
1526 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.
1527
1528 [[image:1653358238933-385.png]]
1529
1530
1531 (((
1532 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:
1533 )))
1534
1535 [[image:1653358355238-883.png]]
1536
1537
1538 (((
1539 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/]]
1540 )))
1541
1542 (((
1543 AT+<CMD>?        : Help on <CMD>
1544 )))
1545
1546 (((
1547 AT+<CMD>         : Run <CMD>
1548 )))
1549
1550 (((
1551 AT+<CMD>=<value> : Set the value
1552 )))
1553
1554 (((
1555 AT+<CMD>=?       : Get the value
1556 )))
1557
1558 (((
1559 ATZ: Trig a reset of the MCU
1560 )))
1561
1562 (((
1563 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1564 )))
1565
1566 (((
1567 AT+DEUI: Get or Set the Device EUI
1568 )))
1569
1570 (((
1571 AT+DADDR: Get or Set the Device Address
1572 )))
1573
1574 (((
1575 AT+APPKEY: Get or Set the Application Key
1576 )))
1577
1578 (((
1579 AT+NWKSKEY: Get or Set the Network Session Key
1580 )))
1581
1582 (((
1583 AT+APPSKEY: Get or Set the Application Session Key
1584 )))
1585
1586 (((
1587 AT+APPEUI: Get or Set the Application EUI
1588 )))
1589
1590 (((
1591 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1592 )))
1593
1594 (((
1595 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1596 )))
1597
1598 (((
1599 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1600 )))
1601
1602 (((
1603 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1604 )))
1605
1606 (((
1607 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1608 )))
1609
1610 (((
1611 AT+RX2FQ: Get or Set the Rx2 window frequency
1612 )))
1613
1614 (((
1615 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1616 )))
1617
1618 (((
1619 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1620 )))
1621
1622 (((
1623 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1624 )))
1625
1626 (((
1627 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1628 )))
1629
1630 (((
1631 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1632 )))
1633
1634 (((
1635 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1636 )))
1637
1638 (((
1639 AT+NWKID: Get or Set the Network ID
1640 )))
1641
1642 (((
1643 AT+FCU: Get or Set the Frame Counter Uplink
1644 )))
1645
1646 (((
1647 AT+FCD: Get or Set the Frame Counter Downlink
1648 )))
1649
1650 (((
1651 AT+CLASS: Get or Set the Device Class
1652 )))
1653
1654 (((
1655 AT+JOIN: Join network
1656 )))
1657
1658 (((
1659 AT+NJS: Get OTAA Join Status
1660 )))
1661
1662 (((
1663 AT+SENDB: Send hexadecimal data along with the application port
1664 )))
1665
1666 (((
1667 AT+SEND: Send text data along with the application port
1668 )))
1669
1670 (((
1671 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1672 )))
1673
1674 (((
1675 AT+RECV: Print last received data in raw format
1676 )))
1677
1678 (((
1679 AT+VER: Get current image version and Frequency Band
1680 )))
1681
1682 (((
1683 AT+CFM: Get or Set the confirmation mode (0-1)
1684 )))
1685
1686 (((
1687 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1688 )))
1689
1690 (((
1691 AT+SNR: Get the SNR of the last received packet
1692 )))
1693
1694 (((
1695 AT+RSSI: Get the RSSI of the last received packet
1696 )))
1697
1698 (((
1699 AT+TDC: Get or set the application data transmission interval in ms
1700 )))
1701
1702 (((
1703 AT+PORT: Get or set the application port
1704 )))
1705
1706 (((
1707 AT+DISAT: Disable AT commands
1708 )))
1709
1710 (((
1711 AT+PWORD: Set password, max 9 digits
1712 )))
1713
1714 (((
1715 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1716 )))
1717
1718 (((
1719 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1720 )))
1721
1722 (((
1723 AT+CFG: Print all settings
1724
1725
1726 )))
1727
1728
1729
1730 == 4.2 Common AT Command Sequence ==
1731
1732 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1733
1734 (((
1735
1736
1737 **If device has not joined network yet:**
1738 )))
1739
1740 (((
1741 (% style="background-color:#dcdcdc" %)123456
1742 )))
1743
1744 (((
1745 (% style="background-color:#dcdcdc" %)AT+FDR
1746 )))
1747
1748 (((
1749 (% style="background-color:#dcdcdc" %)123456
1750 )))
1751
1752 (((
1753 (% style="background-color:#dcdcdc" %)AT+NJM=0
1754 )))
1755
1756 (((
1757 (% style="background-color:#dcdcdc" %)ATZ
1758 )))
1759
1760
1761 (((
1762 **If device already joined network:**
1763 )))
1764
1765 (((
1766 (% style="background-color:#dcdcdc" %)AT+NJM=0
1767 )))
1768
1769 (((
1770 (% style="background-color:#dcdcdc" %)ATZ
1771
1772
1773 )))
1774
1775
1776
1777 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1778
1779 (((
1780
1781
1782 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1783 )))
1784
1785 (((
1786 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1787 )))
1788
1789 (((
1790 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1791 )))
1792
1793 (((
1794 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1795 )))
1796
1797 (((
1798 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1799 )))
1800
1801 (((
1802 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1803 )))
1804
1805 (((
1806 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1807 )))
1808
1809 (((
1810 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1811 )))
1812
1813 (((
1814 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1815 )))
1816
1817 (((
1818 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1819 )))
1820
1821 (((
1822 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1823 )))
1824
1825 (((
1826 (% 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.
1827 )))
1828
1829 (((
1830 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1831
1832
1833 )))
1834
1835 (((
1836 (% style="color:red" %)**Note:**
1837 )))
1838
1839 (((
1840 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1841 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1842 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.
1843 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
1844 )))
1845
1846 (((
1847 [[image:1653359097980-169.png||height="188" width="729"]]
1848 )))
1849
1850 (((
1851
1852 )))
1853
1854
1855 === 4.2.3 Change to Class A ===
1856
1857 If sensor JOINED
1858 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1859 ATZ
1860
1861
1862 = 5. FAQ =
1863
1864 == 5.1 How to upgrade the image? ==
1865
1866
1867 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1868
1869 * Support new features
1870 * For bug fix
1871 * Change LoRaWAN bands.
1872
1873 Below shows the hardware connection for how to upload an image to the LT:
1874
1875 [[image:1653359603330-121.png]]
1876
1877
1878 (((
1879 (% 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]].
1880 (% 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/]].
1881 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1882
1883
1884 (% style="color:blue" %)**For LT-22222-L**(%%):
1885 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.
1886 )))
1887
1888 [[image:image-20220524103407-12.png]]
1889
1890 [[image:image-20220524103429-13.png]]
1891
1892 [[image:image-20220524104033-15.png]]
1893
1894
1895 (% 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:
1896
1897 [[image:1653360054704-518.png||height="186" width="745"]]
1898
1899
1900 (((
1901 (((
1902
1903
1904 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1905 )))
1906 )))
1907
1908 (((
1909 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1910 )))
1911
1912 (((
1913
1914
1915 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1916 )))
1917
1918 (((
1919 (((
1920 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1921 )))
1922 )))
1923
1924 (((
1925 (((
1926 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1927
1928
1929 )))
1930 )))
1931
1932 (((
1933 (% 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.
1934 )))
1935
1936 (((
1937 [[image:1653360231087-571.png||height="401" width="727"]]
1938 )))
1939
1940 (((
1941 (% 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.
1942 )))
1943
1944
1945 (((
1946 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1947 )))
1948
1949 (((
1950 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1951 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1952 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1953 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1954 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1955 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1956 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1957 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1958 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1959 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1960 )))
1961
1962
1963 (((
1964 As shown in below:
1965 )))
1966
1967 [[image:1653360498588-932.png||height="485" width="726"]]
1968
1969
1970 == 5.4 Can I see counting event in Serial? ==
1971
1972 (((
1973 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.
1974
1975
1976 == 5.5 Can i use point to point communication for LT-22222-L? ==
1977
1978 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1979 )))
1980
1981 (((
1982
1983
1984 = 6. Trouble Shooting =
1985 )))
1986
1987 (((
1988 (((
1989 == 6.1 Downlink doesn’t work, how to solve it? ==
1990 )))
1991 )))
1992
1993 (((
1994 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1995 )))
1996
1997 (((
1998
1999
2000 == 6.2 Have trouble to upload image. ==
2001 )))
2002
2003 (((
2004 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
2005 )))
2006
2007 (((
2008
2009
2010 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
2011 )))
2012
2013 (((
2014 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
2015 )))
2016
2017
2018
2019 = 7. Order Info =
2020
2021
2022 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
2023
2024
2025 (% style="color:#4f81bd" %)**XXX:**
2026
2027 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
2028 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
2029 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
2030 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
2031 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
2032 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
2033 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
2034 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
2035 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
2036
2037 = 8. Packing Info =
2038
2039
2040 **Package Includes**:
2041
2042 * LT-22222-L I/O Controller x 1
2043 * Stick Antenna for LoRa RF part x 1
2044 * Bracket for controller x1
2045 * Program cable x 1
2046
2047 **Dimension and weight**:
2048
2049 * Device Size: 13.5 x 7 x 3 cm
2050 * Device Weight: 105g
2051 * Package Size / pcs : 14.5 x 8 x 5 cm
2052 * Weight / pcs : 170g
2053
2054 = 9. Support =
2055
2056 * (((
2057 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.
2058 )))
2059 * (((
2060 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]]
2061 )))
2062
2063 = 10. Reference​​​​​ =
2064
2065 * 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]]
2066 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2067 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2068 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]