Skip to Content
Version 75.7 by Xiaoling on 2022/06/01 17:27
Show last authors
1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
3
4 **LT-22222-L LoRa IO Controller User Manual **
5
6
7 **Table of Contents:**
8
9 {{toc/}}
10
11
12
13
14 = 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 == 1.5 Hardware Variants ==
182
183 (% border="1" style="background-color:#f7faff; width:500px" %)
184 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
185 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
186 * 2 x Digital Input (Bi-direction)
187 * 2 x Digital Output
188 * 2 x Relay Output (5A@250VAC / 30VDC)
189 * 2 x 0~~20mA Analog Input (res:0.01mA)
190 * 2 x 0~~30V Analog Input (res:0.01v)
191 * 1 x Counting Port
192 )))
193
194 = 2. Power ON Device =
195
196 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.
197
198 (((
199 PWR will on when device is properly powered.
200 )))
201
202 [[image:1653297104069-180.png]]
203
204
205 = 3. Operation Mode =
206
207 == 3.1 How it works? ==
208
209 (((
210 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. 
211 )))
212
213 (((
214 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.
215
216
217 )))
218
219 == 3.2 Example to join LoRaWAN network ==
220
221 (((
222 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. 
223 )))
224
225 [[image:image-20220523172350-1.png||height="266" width="864"]]
226
227 (((
228 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:
229 )))
230
231 (((
232 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
233 )))
234
235 (((
236 Each LT is shipped with a sticker with the default device EUI as below:
237 )))
238
239 [[image:1653297924498-393.png]]
240
241 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
242
243 Add APP EUI in the application.
244
245 [[image:1653297955910-247.png||height="321" width="716"]]
246
247
248 Add APP KEY and DEV EUI
249
250 [[image:1653298023685-319.png]]
251
252
253 (((
254 **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.
255 )))
256
257 [[image:1653298044601-602.png||height="405" width="709"]]
258
259
260 == 3.3 Uplink Payload ==
261
262 There are five working modes + one interrupt mode on LT for different type application:
263
264 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
265 * **MOD2**: Double DI Counting + DO + RO
266 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
267 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
268 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
269 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
270
271 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
272
273 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
274
275 [[image:image-20220523174024-3.png]]
276
277 (((
278 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
279 )))
280
281 [[image:image-20220523174254-4.png]]
282
283 * RO is for relay. ROx=1 : close，ROx=0 always open.
284 * DI is for digital input. DIx=1: high or float, DIx=0: low.
285 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
286
287 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
288
289 For example if payload is: [[image:image-20220523175847-2.png]]
290
291 **The value for the interface is:  **
292
293 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
294
295 AVI2 channel voltage is 0x04AC/1000=1.196V
296
297 ACI1 channel current is 0x1310/1000=4.880mA
298
299 ACI2 channel current is 0x1300/1000=4.864mA
300
301 The last byte 0xAA= 10101010(B) means
302
303 * [1] RO1 relay channel is close and the RO1 LED is ON.
304 * [0] RO2 relay channel is open and RO2 LED is OFF;
305
306 **LT22222-L:**
307
308 * [1] DI2 channel is high input and DI2 LED is ON;
309 * [0] DI1 channel is low input;
310
311 * [0] DO3 channel output state
312 ** DO3 is float in case no load between DO3 and V+.;
313 ** DO3 is high in case there is load between DO3 and V+.
314 ** DO3 LED is off in both case
315 * [1] DO2 channel output is low and DO2 LED is ON.
316 * [0] DO1 channel output state
317 ** DO1 is float in case no load between DO1 and V+.;
318 ** DO1 is high in case there is load between DO1 and V+.
319 ** DO1 LED is off in both case
320
321 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
322
323 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
324
325 (((
326 Total : 11 bytes payload
327 )))
328
329 [[image:image-20220523180452-3.png]]
330
331 (((
332 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
333 )))
334
335 [[image:image-20220523180506-4.png]]
336
337 * RO is for relay. ROx=1 : close，ROx=0 always open.
338 * FIRST: Indicate this is the first packet after join network.
339 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
340
341 (((
342 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
343 )))
344
345 (((
346 **To use counting mode, please run:**
347 )))
348
349 (% class="box infomessage" %)
350 (((
351 (((
352 **AT+MOD=2**
353 )))
354 )))
355
356 (% class="box infomessage" %)
357 (((
358 (((
359 **ATZ**
360 )))
361 )))
362
363 (((
364 (% style="color:#4f81bd" %)**AT Commands for counting:**
365 )))
366
367 (((
368 **For LT22222-L:**
369 )))
370
371 (% class="box infomessage" %)
372 (((
373 (((
374 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
375 )))
376 )))
377
378 (% class="box infomessage" %)
379 (((
380 (((
381 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
382 )))
383 )))
384
385 (% class="box infomessage" %)
386 (((
387 (((
388 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
389 )))
390 )))
391
392 (% class="box infomessage" %)
393 (((
394 (((
395 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
396 )))
397 )))
398
399 (% class="box infomessage" %)
400 (((
401 (((
402 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
403 )))
404 )))
405
406 (% class="box infomessage" %)
407 (((
408 (((
409 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
410 )))
411 )))
412
413
414 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
415
416 **LT22222-L**: This mode the DI1 is used as a counting pin.
417
418 [[image:image-20220523181246-5.png]]
419
420 (((
421 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
422 )))
423
424 [[image:image-20220523181301-6.png]]
425
426 * RO is for relay. ROx=1 : close，ROx=0 always open.
427 * FIRST: Indicate this is the first packet after join network.
428 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
429
430 (((
431 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
432 )))
433
434 (((
435 **To use counting mode, please run:**
436 )))
437
438 (% class="box infomessage" %)
439 (((
440 (((
441 **AT+MOD=3**
442 )))
443 )))
444
445 (% class="box infomessage" %)
446 (((
447 (((
448 **ATZ**
449 )))
450 )))
451
452 (((
453 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
454
455
456 )))
457
458 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
459
460 **LT22222-L**: This mode the DI1 is used as a counting pin.
461
462 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.
463
464 [[image:image-20220523181903-8.png]]
465
466 (((
467 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
468 )))
469
470 [[image:image-20220523181727-7.png]]
471
472 * RO is for relay. ROx=1 : close，ROx=0 always open.
473 * FIRST: Indicate this is the first packet after join network.
474 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
475
476 (((
477 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
478 )))
479
480 (((
481 **To use this mode, please run:**
482 )))
483
484 (% class="box infomessage" %)
485 (((
486 (((
487 **AT+MOD=4**
488 )))
489 )))
490
491 (% class="box infomessage" %)
492 (((
493 (((
494 **ATZ**
495 )))
496 )))
497
498 (((
499
500 )))
501
502 (((
503 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
504 )))
505
506 (((
507 **Plus below command for AVI1 Counting:**
508 )))
509
510 (% class="box infomessage" %)
511 (((
512 (((
513 **AT+SETCNT=3,60   (set AVI Count to 60)**
514 )))
515 )))
516
517 (% class="box infomessage" %)
518 (((
519 (((
520 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
521 )))
522 )))
523
524 (% class="box infomessage" %)
525 (((
526 (((
527 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
528 )))
529 )))
530
531 (% class="box infomessage" %)
532 (((
533 (((
534 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
535 )))
536 )))
537
538
539 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
540
541 **LT22222-L**: This mode the DI1 is used as a counting pin.
542
543 [[image:image-20220523182334-9.png]]
544
545 (((
546 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
547 )))
548
549 * RO is for relay. ROx=1 : close，ROx=0 always open.
550 * FIRST: Indicate this is the first packet after join network.
551 * (((
552 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
553 )))
554
555 (((
556 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
557 )))
558
559 (((
560 **To use this mode, please run:**
561 )))
562
563 (% class="box infomessage" %)
564 (((
565 (((
566 **AT+MOD=5**
567 )))
568 )))
569
570 (% class="box infomessage" %)
571 (((
572 (((
573 **ATZ**
574 )))
575 )))
576
577 (((
578 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
579
580
581 )))
582
583 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
584
585 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
586
587 For example, if user has configured below commands:
588
589 * **AT+MOD=1 ** **~-~->** The normal working mode
590 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
591
592 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
593
594 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
595 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.**
596
597 **AT Command to set Trigger Condition**:
598
599 (% style="color:#4f81bd" %)**Trigger base on voltage**:
600
601 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
602
603 **Example:**
604
605 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)
606
607 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
608
609 (% style="color:#4f81bd" %)**Trigger base on current**:
610
611 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
612
613 **Example:**
614
615 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
616
617 (% style="color:#4f81bd" %)**Trigger base on DI status**:
618
619 DI status trigger Flag.
620
621 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
622
623 **Example:**
624
625 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
626
627
628 **Downlink Command to set Trigger Condition**
629
630 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
631
632 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
633
634 AA: Code for this downlink Command:
635
636 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
637
638 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
639
640 yy2 yy2: AC1 or AV1 high limit.
641
642 yy3 yy3: AC2 or AV2 low limit.
643
644 Yy4 yy4: AC2 or AV2 high limit.
645
646 **Example1**: AA 00 13 88 00 00 00 00 00 00
647
648 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
649
650 **Example2**: AA 02 01 00
651
652 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
653
654 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
655
656 MOD6 Payload : total 11 bytes payload
657
658 [[image:image-20220524085923-1.png]]
659
660 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
661
662 [[image:image-20220524090106-2.png]]
663
664 * Each bits shows if the corresponding trigger has been configured.
665
666 **Example:**
667
668 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
669
670
671 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
672
673 [[image:image-20220524090249-3.png]]
674
675 * Each bits shows which status has been trigger on this uplink.
676
677 **Example:**
678
679 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
680
681
682 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
683
684 [[image:image-20220524090456-4.png]]
685
686 * Each bits shows which status has been trigger on this uplink.
687
688 **Example:**
689
690 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
691
692 00000101: Means both DI1 and DI2 trigger are enabled.
693
694
695 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
696
697 Downlink command to poll MOD6 status:
698
699 **AB 06**
700
701 When device got this command, it will send the MOD6 payload.
702
703
704 === 3.3.7 Payload Decoder ===
705
706 (((
707 **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/]]
708
709
710 )))
711
712 == 3.4 ​Configure LT via AT or Downlink ==
713
714 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
715
716 (((
717 There are two kinds of Commands:
718 )))
719
720 * (% 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
721
722 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
723
724 === 3.4.1 Common Commands ===
725
726 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]]
727
728
729 === 3.4.2 Sensor related commands ===
730
731 ==== 3.4.2.1 Set Transmit Interval ====
732
733 Set device uplink interval.
734
735 * AT Command:
736
737 (% class="box infomessage" %)
738 (((
739 **AT+TDC=N **
740 )))
741
742 **Example: **AT+TDC=30000. Means set interval to 30 seconds
743
744 * Downlink Payload (prefix 0x01):
745
746 (% class="box infomessage" %)
747 (((
748 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
749 )))
750
751
752 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
753
754 Set work mode.
755
756 * AT Command:
757
758 (% class="box infomessage" %)
759 (((
760 **AT+MOD=N  **
761 )))
762
763 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
764
765 * Downlink Payload (prefix 0x0A):
766
767 (% class="box infomessage" %)
768 (((
769 **0x0A aa     ~/~/ Same as AT+MOD=aa**
770 )))
771
772
773 ==== 3.4.2.3 Poll an uplink ====
774
775 * AT Command:
776
777 There is no AT Command to poll uplink
778
779 * Downlink Payload (prefix 0x08):
780
781 (% class="box infomessage" %)
782 (((
783 **0x08 FF     ~/~/ Poll an uplink,**
784 )))
785
786 **Example**: 0x08FF, ask device to send an Uplink
787
788
789 ==== 3.4.2.4 Enable Trigger Mode ====
790
791 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]]
792
793 * AT Command:
794
795 (% class="box infomessage" %)
796 (((
797 **AT+ADDMOD6=1 or 0**
798 )))
799
800 1: Enable Trigger Mode
801
802 0: Disable Trigger Mode
803
804 * Downlink Payload (prefix 0x0A 06):
805
806 (% class="box infomessage" %)
807 (((
808 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
809 )))
810
811
812 ==== 3.4.2.5 Poll trigger settings ====
813
814 Poll trigger settings,
815
816 * AT Command:
817
818 There is no AT Command for this feature.
819
820 * Downlink Payload (prefix 0x AB 06):
821
822 (% class="box infomessage" %)
823 (((
824 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
825 )))
826
827
828 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
829
830 Enable Disable DI1/DI2/DI2 as trigger,
831
832 * AT Command:
833
834 (% class="box infomessage" %)
835 (((
836 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
837 )))
838
839 **Example:**
840
841 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
842
843 * Downlink Payload (prefix 0xAA 02):
844
845 (% class="box infomessage" %)
846 (((
847 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
848 )))
849
850
851 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
852
853 Set DI1 or DI3(for LT-33222-L) trigger.
854
855 * AT Command:
856
857 (% class="box infomessage" %)
858 (((
859 **AT+TRIG1=a,b**
860 )))
861
862 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
863
864 b : delay timing.
865
866 **Example:**
867
868 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
869
870 * Downlink Payload (prefix 0x09 01 ):
871
872 (% class="box infomessage" %)
873 (((
874 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
875 )))
876
877
878 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
879
880 Set DI2 trigger.
881
882 * AT Command:
883
884 (% class="box infomessage" %)
885 (((
886 **AT+TRIG2=a,b**
887 )))
888
889 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
890
891 b : delay timing.
892
893 **Example:**
894
895 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
896
897 * Downlink Payload (prefix 0x09 02 ):
898
899 (% class="box infomessage" %)
900 (((
901 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
902 )))
903
904
905 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
906
907 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]]
908
909 * AT Command:
910
911 (% class="box infomessage" %)
912 (((
913 **AT+ACLIM. **
914 )))
915
916 * Downlink Payload (prefix 0xAA 01 ):
917
918 (% class="box infomessage" %)
919 (((
920 **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]]**
921 )))
922
923
924 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
925
926 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]]
927
928 * AT Command:
929
930 (% class="box infomessage" %)
931 (((
932 **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]]**
933 )))
934
935 * Downlink Payload (prefix 0xAA 00 ):
936
937 (% class="box infomessage" %)
938 (((
939 **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]] **
940 )))
941
942
943 ==== 3.4.2.11 Trigger – Set minimum interval ====
944
945 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
946
947 * AT Command:
948
949 (% class="box infomessage" %)
950 (((
951 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
952 )))
953
954 * Downlink Payload (prefix 0xAC ):
955
956 (% class="box infomessage" %)
957 (((
958 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
959 )))
960
961
962 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
963
964 * AT Command:
965
966 There is no AT Command to control Digital Output
967
968 * Downlink Payload (prefix 0x02):
969
970 (% class="box infomessage" %)
971 (((
972 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
973 )))
974
975 (((
976 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
977 )))
978
979 (((
980 01: Low,  00: High ,  11: No action
981 )))
982
983 [[image:image-20220524092754-5.png]]
984
985 (((
986 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
987 )))
988
989 (((
990 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
991 )))
992
993
994 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
995
996 * AT Command:
997
998 There is no AT Command to control Digital Output
999
1000 * Downlink Payload (prefix 0xA9):
1001
1002 (% class="box infomessage" %)
1003 (((
1004 (((
1005 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
1006 )))
1007 )))
1008
1009 This is to control the digital output time of DO pin. Include four bytes:
1010
1011 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
1012
1013 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
1014
1015 01: DO pins will change back to original state after timeout.
1016
1017 00: DO pins will change to an inverter state after timeout 
1018
1019 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
1020
1021 [[image:image-20220524093238-6.png]]
1022
1023 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
1024
1025 [[image:image-20220524093328-7.png]]
1026
1027 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
1028
1029 [[image:image-20220524093351-8.png]]
1030
1031 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
1032
1033 Latching time. Unit: ms
1034
1035 Device will upload a packet if downlink code executes successfully.
1036
1037 **Example payload:**
1038
1039 **~1. A9 01 01 01 01 07 D0**
1040
1041 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1042
1043 **2. A9 01 00 01 11 07 D0**
1044
1045 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1046
1047 **3. A9 00 00 00 00 07 D0**
1048
1049 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1050
1051 **4. A9 00 11 01 00 07 D0**
1052
1053 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
1054
1055
1056 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1057
1058 * AT Command:
1059
1060 There is no AT Command to control Relay Output
1061
1062 * Downlink Payload (prefix 0x03):
1063
1064 (% class="box infomessage" %)
1065 (((
1066 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1067 )))
1068
1069 (((
1070 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1071 )))
1072
1073 (((
1074 01: Close ,  00: Open , 11: No action
1075 )))
1076
1077 (((
1078 [[image:image-20220524093724-9.png]]
1079 )))
1080
1081 Device will upload a packet if downlink code executes successfully.
1082
1083
1084 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1085
1086 * AT Command:
1087
1088 There is no AT Command to control Relay Output
1089
1090 * Downlink Payload (prefix 0x05):
1091
1092 (% class="box infomessage" %)
1093 (((
1094 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1095 )))
1096
1097 This is to control the relay output time of relay. Include four bytes:
1098
1099 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1100
1101 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1102
1103 01: Relays will change back to original state after timeout.
1104
1105 00: Relays will change to an inverter state after timeout
1106
1107 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1108
1109 [[image:image-20220524093831-10.png]]
1110
1111 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1112
1113 Device will upload a packet if downlink code executes successfully.
1114
1115 **Example payload:**
1116
1117 **~1. 05 01 11 07 D0**
1118
1119 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1120
1121 **2. 05 01 10 07 D0**
1122
1123 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1124
1125 **3. 05 00 01 07 D0**
1126
1127 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1128
1129 **4. 05 00 00 07 D0**
1130
1131 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1132
1133
1134 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1135
1136 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]]
1137
1138 * AT Command:
1139
1140 (% class="box infomessage" %)
1141 (((
1142 **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]]**
1143 )))
1144
1145 * Downlink Payload (prefix 0xA5):
1146
1147 (% class="box infomessage" %)
1148 (((
1149 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1150 )))
1151
1152
1153 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1154
1155 * AT Command:
1156
1157 (% class="box infomessage" %)
1158 (((
1159 **AT+SETCNT=aa,(bb cc dd ee) **
1160 )))
1161
1162 aa: 1: Set count1,
1163
1164 2: Set count2,
1165
1166 3: Set AV1 count
1167
1168 Bb cc dd ee: number to be set
1169
1170 * Downlink Payload (prefix 0xA8):
1171
1172 (% class="box infomessage" %)
1173 (((
1174 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1175 )))
1176
1177
1178 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1179
1180 Clear counting for counting mode
1181
1182 * AT Command:
1183
1184 (% class="box infomessage" %)
1185 (((
1186 **AT+CLRCOUNT ~/~/ clear all counting**
1187 )))
1188
1189 * Downlink Payload (prefix 0xA6):
1190
1191 (% class="box infomessage" %)
1192 (((
1193 **0x A6 01     ~/~/ clear all counting,**
1194 )))
1195
1196
1197 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1198
1199 * AT Command:
1200
1201 (% class="box infomessage" %)
1202 (((
1203 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1204 )))
1205
1206 * Downlink Payload (prefix 0xA7):
1207
1208 (% class="box infomessage" %)
1209 (((
1210 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1211 )))
1212
1213 (((
1214 range: aa bb cc:0 to 16777215,  (unit:second)
1215
1216
1217 )))
1218
1219 == 3.5 Integrate with Mydevice ==
1220
1221 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:
1222
1223 (((
1224 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1225 )))
1226
1227 (((
1228 **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:
1229 )))
1230
1231 [[image:1653356737703-362.png||height="232" width="732"]]
1232
1233 [[image:image-20220524094641-11.png||height="390" width="723"]]
1234
1235 [[image:image-20220524094641-12.png||height="402" width="718"]]
1236
1237 **Step 3**: Create an account or log in Mydevices.
1238
1239 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1240
1241 Search under The things network
1242
1243 [[image:1653356838789-523.png||height="337" width="740"]]
1244
1245
1246 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1247
1248 [[image:image-20220524094909-1.png||height="335" width="729"]]
1249
1250 [[image:image-20220524094909-2.png||height="337" width="729"]]
1251
1252 [[image:image-20220524094909-3.png||height="338" width="727"]]
1253
1254 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1255
1256 [[image:image-20220524094909-5.png||height="341" width="734"]]
1257
1258
1259 == 3.6 Interface Detail ==
1260
1261 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1262
1263 Support NPN Type sensor
1264
1265 [[image:1653356991268-289.png]]
1266
1267
1268 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1269
1270 (((
1271 The DI port of LT-22222-L can support NPN or PNP output sensor.
1272 )))
1273
1274 (((
1275 (((
1276 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
1277 )))
1278 )))
1279
1280 [[image:1653357170703-587.png]]
1281
1282 (((
1283 (((
1284 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1285 )))
1286 )))
1287
1288 (((
1289
1290 )))
1291
1292 (((
1293 **Example1**: Connect to a Low active sensor.
1294 )))
1295
1296 (((
1297 This type of sensor will output a low signal GND when active.
1298 )))
1299
1300 * (((
1301 Connect sensor’s output to DI1-
1302 )))
1303 * (((
1304 Connect sensor’s VCC to DI1+.
1305 )))
1306
1307 (((
1308 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1309 )))
1310
1311 (((
1312 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1313 )))
1314
1315 (((
1316 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.
1317 )))
1318
1319 (((
1320
1321 )))
1322
1323 (((
1324 **Example2**: Connect to a High active sensor.
1325 )))
1326
1327 (((
1328 This type of sensor will output a high signal (example 24v) when active.
1329 )))
1330
1331 * (((
1332 Connect sensor’s output to DI1+
1333 )))
1334 * (((
1335 Connect sensor’s GND DI1-.
1336 )))
1337
1338 (((
1339 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1340 )))
1341
1342 (((
1343 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1344 )))
1345
1346 (((
1347 If **DI1+ = 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.
1348 )))
1349
1350 (((
1351
1352 )))
1353
1354 (((
1355 **Example3**: Connect to a 220v high active sensor.
1356 )))
1357
1358 (((
1359 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1360 )))
1361
1362 * (((
1363 Connect sensor’s output to DI1+ with a serial 50K resistor
1364 )))
1365 * (((
1366 Connect sensor’s GND DI1-.
1367 )))
1368
1369 (((
1370 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1371 )))
1372
1373 (((
1374 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1375 )))
1376
1377 (((
1378 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.
1379 )))
1380
1381
1382 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1383
1384 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1385
1386 [[image:1653357531600-905.png]]
1387
1388
1389 === 3.6.4 Analog Input Interface ===
1390
1391 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:
1392
1393 **AC2 = (IN2 voltage )/12**
1394
1395 [[image:1653357592296-182.png]]
1396
1397 Example to connect a 4~~20mA sensor
1398
1399 We take the wind speed sensor as an example for reference only.
1400
1401 Specifications of the wind speed sensor:
1402
1403 Red:12~~24v
1404
1405 Yellow:4~~20mA
1406
1407 Black:GND
1408
1409
1410 Connection diagram:
1411
1412 [[image:1653357640609-758.png]]
1413
1414 [[image:1653357648330-671.png||height="155" width="733"]]
1415
1416
1417 === 3.6.5 Relay Output ===
1418
1419 (((
1420 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:
1421 )))
1422
1423 [[image:image-20220524100215-9.png]]
1424
1425 [[image:image-20220524100215-10.png||height="382" width="723"]]
1426
1427
1428 == 3.7 LEDs Indicators ==
1429
1430 [[image:image-20220524100748-11.png]]
1431
1432
1433 = 4. Use AT Command =
1434
1435 == 4.1 Access AT Command ==
1436
1437 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.
1438
1439 [[image:1653358238933-385.png]]
1440
1441 (((
1442 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:
1443 )))
1444
1445 [[image:1653358355238-883.png]]
1446
1447 (((
1448 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/]]
1449 )))
1450
1451 (((
1452 AT+<CMD>?        : Help on <CMD>
1453 )))
1454
1455 (((
1456 AT+<CMD>         : Run <CMD>
1457 )))
1458
1459 (((
1460 AT+<CMD>=<value> : Set the value
1461 )))
1462
1463 (((
1464 AT+<CMD>=?       : Get the value
1465 )))
1466
1467 (((
1468 ATZ: Trig a reset of the MCU
1469 )))
1470
1471 (((
1472 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1473 )))
1474
1475 (((
1476 AT+DEUI: Get or Set the Device EUI
1477 )))
1478
1479 (((
1480 AT+DADDR: Get or Set the Device Address
1481 )))
1482
1483 (((
1484 AT+APPKEY: Get or Set the Application Key
1485 )))
1486
1487 (((
1488 AT+NWKSKEY: Get or Set the Network Session Key
1489 )))
1490
1491 (((
1492 AT+APPSKEY: Get or Set the Application Session Key
1493 )))
1494
1495 (((
1496 AT+APPEUI: Get or Set the Application EUI
1497 )))
1498
1499 (((
1500 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1501 )))
1502
1503 (((
1504 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1505 )))
1506
1507 (((
1508 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1509 )))
1510
1511 (((
1512 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1513 )))
1514
1515 (((
1516 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1517 )))
1518
1519 (((
1520 AT+RX2FQ: Get or Set the Rx2 window frequency
1521 )))
1522
1523 (((
1524 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1525 )))
1526
1527 (((
1528 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1529 )))
1530
1531 (((
1532 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1533 )))
1534
1535 (((
1536 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1537 )))
1538
1539 (((
1540 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1541 )))
1542
1543 (((
1544 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1545 )))
1546
1547 (((
1548 AT+NWKID: Get or Set the Network ID
1549 )))
1550
1551 (((
1552 AT+FCU: Get or Set the Frame Counter Uplink
1553 )))
1554
1555 (((
1556 AT+FCD: Get or Set the Frame Counter Downlink
1557 )))
1558
1559 (((
1560 AT+CLASS: Get or Set the Device Class
1561 )))
1562
1563 (((
1564 AT+JOIN: Join network
1565 )))
1566
1567 (((
1568 AT+NJS: Get OTAA Join Status
1569 )))
1570
1571 (((
1572 AT+SENDB: Send hexadecimal data along with the application port
1573 )))
1574
1575 (((
1576 AT+SEND: Send text data along with the application port
1577 )))
1578
1579 (((
1580 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1581 )))
1582
1583 (((
1584 AT+RECV: Print last received data in raw format
1585 )))
1586
1587 (((
1588 AT+VER: Get current image version and Frequency Band
1589 )))
1590
1591 (((
1592 AT+CFM: Get or Set the confirmation mode (0-1)
1593 )))
1594
1595 (((
1596 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1597 )))
1598
1599 (((
1600 AT+SNR: Get the SNR of the last received packet
1601 )))
1602
1603 (((
1604 AT+RSSI: Get the RSSI of the last received packet
1605 )))
1606
1607 (((
1608 AT+TDC: Get or set the application data transmission interval in ms
1609 )))
1610
1611 (((
1612 AT+PORT: Get or set the application port
1613 )))
1614
1615 (((
1616 AT+DISAT: Disable AT commands
1617 )))
1618
1619 (((
1620 AT+PWORD: Set password, max 9 digits
1621 )))
1622
1623 (((
1624 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1625 )))
1626
1627 (((
1628 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1629 )))
1630
1631 (((
1632 AT+CFG: Print all settings
1633
1634
1635 )))
1636
1637 == 4.2 Common AT Command Sequence ==
1638
1639 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1640
1641 (((
1642 If device has not joined network yet:
1643 )))
1644
1645 (((
1646 (% style="background-color:#dcdcdc" %)123456
1647 )))
1648
1649 (((
1650 (% style="background-color:#dcdcdc" %)AT+FDR
1651 )))
1652
1653 (((
1654 (% style="background-color:#dcdcdc" %)123456
1655 )))
1656
1657 (((
1658 (% style="background-color:#dcdcdc" %)AT+NJM=0
1659 )))
1660
1661 (((
1662 (% style="background-color:#dcdcdc" %)ATZ
1663 )))
1664
1665
1666 (((
1667 If device already joined network:
1668 )))
1669
1670 (((
1671 (% style="background-color:#dcdcdc" %)AT+NJM=0
1672 )))
1673
1674 (((
1675 (% style="background-color:#dcdcdc" %)ATZ
1676
1677
1678 )))
1679
1680 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1681
1682 (((
1683 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1684 )))
1685
1686 (((
1687 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1688 )))
1689
1690 (((
1691 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1692 )))
1693
1694 (((
1695 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1696 )))
1697
1698 (((
1699 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1700 )))
1701
1702 (((
1703 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1704 )))
1705
1706 (((
1707 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1708 )))
1709
1710 (((
1711 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1712 )))
1713
1714 (((
1715 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1716 )))
1717
1718 (((
1719 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1720 )))
1721
1722 (((
1723 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1724 )))
1725
1726 (((
1727 (% 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.
1728 )))
1729
1730 (((
1731 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1732 )))
1733
1734 (((
1735 (% style="color:red" %)**Note:**
1736 )))
1737
1738 (((
1739 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1740 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1741 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.
1742 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
1743 )))
1744
1745 (((
1746 [[image:1653359097980-169.png||height="188" width="729"]]
1747 )))
1748
1749 (((
1750
1751 )))
1752
1753 === 4.2.3 Change to Class A ===
1754
1755 If sensor JOINED
1756 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1757 ATZ
1758
1759
1760 = 5. FAQ =
1761
1762 == 5.1 How to upgrade the image? ==
1763
1764 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1765
1766 * Support new features
1767 * For bug fix
1768 * Change LoRaWAN bands.
1769 Below shows the hardware connection for how to upload an image to the LT:
1770 * [[image:1653359603330-121.png]]
1771
1772 (((
1773 **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]].
1774 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1775 **Step3: **Open flashloader; choose the correct COM port to update.
1776 **For LT-22222-L**:
1777 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.
1778 )))
1779
1780 [[image:image-20220524103407-12.png]]
1781
1782 [[image:image-20220524103429-13.png]]
1783
1784 [[image:image-20220524104033-15.png]]
1785
1786 (% 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:
1787
1788 [[image:1653360054704-518.png||height="186" width="745"]]
1789
1790
1791 (((
1792 (((
1793 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1794 )))
1795 )))
1796
1797 (((
1798 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1799
1800
1801 )))
1802
1803 (((
1804 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1805 )))
1806
1807 (((
1808 (((
1809 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1810 )))
1811 )))
1812
1813 (((
1814 (((
1815 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1816 )))
1817 )))
1818
1819 (((
1820 (% 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.
1821 )))
1822
1823 (((
1824 [[image:1653360231087-571.png||height="401" width="727"]]
1825 )))
1826
1827 (((
1828 (% 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.
1829 )))
1830
1831 (((
1832 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1833 )))
1834
1835 (((
1836 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1837 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1838 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1839 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1840 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1841 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1842 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1843 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1844 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1845 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1846 )))
1847
1848 (((
1849 As shown in below:
1850 )))
1851
1852 [[image:1653360498588-932.png||height="485" width="726"]]
1853
1854
1855 == 5.4 Can I see counting event in Serial? ==
1856
1857 (((
1858 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.
1859
1860
1861 )))
1862
1863 (((
1864 = 6. Trouble Shooting =
1865 )))
1866
1867 (((
1868 (((
1869 == 6.1 Downlink doesn’t work, how to solve it? ==
1870 )))
1871 )))
1872
1873 (((
1874 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1875
1876
1877 )))
1878
1879 (((
1880 == 6.2 Have trouble to upload image. ==
1881 )))
1882
1883 (((
1884 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1885 )))
1886
1887 (((
1888
1889 )))
1890
1891 (((
1892 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1893 )))
1894
1895 (((
1896 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1897 )))
1898
1899 (((
1900
1901 )))
1902
1903 (((
1904 = 7. Order Info =
1905 )))
1906
1907 (((
1908 (((
1909 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1910 )))
1911 )))
1912
1913 (((
1914 (((
1915 (% style="color:#4f81bd" %)**XXX:**
1916 )))
1917 )))
1918
1919 (((
1920 * (((
1921 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1922 )))
1923 )))
1924
1925 (((
1926 * (((
1927 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1928 )))
1929 )))
1930
1931 (((
1932 * (((
1933 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1934 )))
1935 )))
1936
1937 (((
1938 * (((
1939 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1940 )))
1941 )))
1942
1943 (((
1944 * (((
1945 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1946 )))
1947 )))
1948
1949 (((
1950 * (((
1951 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1952 )))
1953 )))
1954
1955 (((
1956 * (((
1957 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1958 )))
1959 )))
1960
1961 (((
1962 * (((
1963 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1964 )))
1965 )))
1966
1967 (((
1968 * (((
1969 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1970
1971
1972 )))
1973
1974 = 8. Packing Info =
1975 )))
1976
1977 (((
1978 (((
1979 **Package Includes**:
1980 )))
1981 )))
1982
1983 (((
1984 (((
1985 * LT-22222-L I/O Controller x 1
1986 * Stick Antenna for LoRa RF part x 1
1987 * Bracket for controller x1
1988 * Program cable x 1
1989 )))
1990 )))
1991
1992 (((
1993 (((
1994 **Dimension and weight**:
1995 )))
1996 )))
1997
1998 (((
1999 (((
2000 * Device Size: 13.5 x 7 x 3 cm
2001 * Device Weight: 105g
2002 * Package Size / pcs : 14.5 x 8 x 5 cm
2003 * Weight / pcs : 170g
2004
2005
2006 )))
2007 )))
2008
2009 (((
2010 = 9. Support =
2011 )))
2012
2013 * (((
2014 (((
2015 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.
2016 )))
2017 )))
2018 * (((
2019 (((
2020 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
2021 )))
2022 )))
2023
2024 (((
2025 (((
2026 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
2027
2028
2029 )))
2030
2031 (((
2032 = 10. Reference​​​​​ =
2033
2034 * Product Page:
2035
2036 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]]
2037
2038 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
2039 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
2040 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
2041 )))
2042 )))