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Version 82.32 by Xiaoling on 2022/06/20 13:36
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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
23
24 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.
25 )))
26
27 (((
28 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.
29 )))
30
31 (((
32 The LT I/O Controllers is aiming to provide an (% style="color:blue" %)**easy and low cost installation** (%%)by using LoRa wireless technology.
33 )))
34
35 (((
36 The use environment includes:
37 )))
38
39 (((
40 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.
41 )))
42
43 (((
44 2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
45 )))
46
47 (((
48 [[image:1653295757274-912.png]]
49
50
51 )))
52
53
54 == 1.2  Specifications ==
55
56 (((
57
58
59 **Hardware System:**
60 )))
61
62 * (((
63 STM32L072CZT6 MCU
64 )))
65 * (((
66 SX1276/78 Wireless Chip 
67 )))
68 * (((
69 (((
70 Power Consumption:
71 )))
72
73 * (((
74 Idle: 4mA@12v
75 )))
76 * (((
77 20dB Transmit: 34mA@12v
78 )))
79 )))
80
81 (((
82
83
84 **Interface for Model: LT22222-L:**
85 )))
86
87 * (((
88 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
89 )))
90 * (((
91 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
92 )))
93 * (((
94 2 x Relay Output (5A@250VAC / 30VDC)
95 )))
96 * (((
97 2 x 0~~20mA Analog Input (res:0.01mA)
98 )))
99 * (((
100 2 x 0~~30V Analog Input (res:0.01v)
101 )))
102 * (((
103 Power Input 7~~ 24V DC. 
104 )))
105
106 (((
107
108
109 **LoRa Spec:**
110 )))
111
112 * (((
113 (((
114 Frequency Range:
115 )))
116
117 * (((
118 Band 1 (HF): 862 ~~ 1020 Mhz
119 )))
120 * (((
121 Band 2 (LF): 410 ~~ 528 Mhz
122 )))
123 )))
124 * (((
125 168 dB maximum link budget.
126 )))
127 * (((
128 +20 dBm - 100 mW constant RF output vs.
129 )))
130 * (((
131 +14 dBm high efficiency PA.
132 )))
133 * (((
134 Programmable bit rate up to 300 kbps.
135 )))
136 * (((
137 High sensitivity: down to -148 dBm.
138 )))
139 * (((
140 Bullet-proof front end: IIP3 = -12.5 dBm.
141 )))
142 * (((
143 Excellent blocking immunity.
144 )))
145 * (((
146 Low RX current of 10.3 mA, 200 nA register retention.
147 )))
148 * (((
149 Fully integrated synthesizer with a resolution of 61 Hz.
150 )))
151 * (((
152 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
153 )))
154 * (((
155 Built-in bit synchronizer for clock recovery.
156 )))
157 * (((
158 Preamble detection.
159 )))
160 * (((
161 127 dB Dynamic Range RSSI.
162 )))
163 * (((
164 Automatic RF Sense and CAD with ultra-fast AFC.
165 )))
166 * (((
167 Packet engine up to 256 bytes with CRC.
168
169
170
171
172 )))
173
174 == 1.3 Features ==
175
176 * LoRaWAN Class A & Class C protocol
177 * Optional Customized LoRa Protocol
178 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
179 * AT Commands to change parameters
180 * Remote configure parameters via LoRa Downlink
181 * Firmware upgradable via program port
182 * Counting
183
184 == 1.4  Applications ==
185
186 * Smart Buildings & Home Automation
187 * Logistics and Supply Chain Management
188 * Smart Metering
189 * Smart Agriculture
190 * Smart Cities
191 * Smart Factory
192
193 == 1.5 Hardware Variants ==
194
195 (% border="1" style="background-color:#f7faff; width:500px" %)
196 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
197 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
198 * 2 x Digital Input (Bi-direction)
199 * 2 x Digital Output
200 * 2 x Relay Output (5A@250VAC / 30VDC)
201 * 2 x 0~~20mA Analog Input (res:0.01mA)
202 * 2 x 0~~30V Analog Input (res:0.01v)
203 * 1 x Counting Port
204 )))
205
206
207
208 = 2. Power ON Device =
209
210 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.
211
212 (((
213 PWR will on when device is properly powered.
214 )))
215
216 [[image:1653297104069-180.png]]
217
218
219
220 = 3. Operation Mode =
221
222 == 3.1 How it works? ==
223
224 (((
225 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. 
226 )))
227
228 (((
229 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.
230 )))
231
232
233 == 3.2 Example to join LoRaWAN network ==
234
235 (((
236 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. 
237 )))
238
239 [[image:image-20220523172350-1.png||height="266" width="864"]]
240
241
242 (((
243 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:
244 )))
245
246 (((
247 (% style="color:blue" %)**Step 1**(%%): Create a device in TTN with the OTAA keys from LT IO controller.
248 )))
249
250 (((
251 Each LT is shipped with a sticker with the default device EUI as below:
252 )))
253
254 [[image:1653297924498-393.png]]
255
256
257 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
258
259 Add APP EUI in the application.
260
261 [[image:1653297955910-247.png||height="321" width="716"]]
262
263
264 Add APP KEY and DEV EUI
265
266 [[image:1653298023685-319.png]]
267
268
269 (((
270 (% style="color:blue" %)**Step 2**(%%): Power on LT and it will auto join to the TTN network. After join success, it will start to upload message to TTN and user can see in the panel.
271 )))
272
273 [[image:1653298044601-602.png||height="405" width="709"]]
274
275
276
277 == 3.3 Uplink Payload ==
278
279 There are five working modes + one interrupt mode on LT for different type application:
280
281 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
282 * **MOD2**: Double DI Counting + DO + RO
283 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
284 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
285 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
286 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
287
288 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
289
290 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
291
292 [[image:image-20220523174024-3.png]]
293
294 (((
295
296
297 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
298 )))
299
300 [[image:image-20220523174254-4.png]]
301
302 * RO is for relay. ROx=1 : close，ROx=0 always open.
303 * DI is for digital input. DIx=1: high or float, DIx=0: low.
304 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
305
306 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
307
308 For example if payload is: [[image:image-20220523175847-2.png]]
309
310
311 **The value for the interface is:  **
312
313 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
314
315 AVI2 channel voltage is 0x04AC/1000=1.196V
316
317 ACI1 channel current is 0x1310/1000=4.880mA
318
319 ACI2 channel current is 0x1300/1000=4.864mA
320
321 The last byte 0xAA= 10101010(B) means
322
323 * [1] RO1 relay channel is close and the RO1 LED is ON.
324 * [0] RO2 relay channel is open and RO2 LED is OFF;
325
326 **LT22222-L:**
327
328 * [1] DI2 channel is high input and DI2 LED is ON;
329 * [0] DI1 channel is low input;
330
331 * [0] DO3 channel output state
332 ** DO3 is float in case no load between DO3 and V+.;
333 ** DO3 is high in case there is load between DO3 and V+.
334 ** DO3 LED is off in both case
335 * [1] DO2 channel output is low and DO2 LED is ON.
336 * [0] DO1 channel output state
337 ** DO1 is float in case no load between DO1 and V+.;
338 ** DO1 is high in case there is load between DO1 and V+.
339 ** DO1 LED is off in both case
340
341 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
342
343
344 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
345
346 (((
347 Total : 11 bytes payload
348 )))
349
350 [[image:image-20220523180452-3.png]]
351
352
353 (((
354 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
355 )))
356
357 [[image:image-20220523180506-4.png]]
358
359 * RO is for relay. ROx=1 : close，ROx=0 always open.
360 * FIRST: Indicate this is the first packet after join network.
361 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
362
363 (((
364 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
365 )))
366
367 (((
368
369
370 **To use counting mode, please run:**
371 )))
372
373 (% class="box infomessage" %)
374 (((
375 (((
376 **AT+MOD=2**
377
378 **ATZ**
379 )))
380 )))
381
382 (((
383
384
385 (% style="color:#4f81bd" %)**AT Commands for counting:**
386 )))
387
388 (((
389 **For LT22222-L:**
390
391
392 (% style="color:blue" %)**AT+TRIG1=0,100**(%%)**  (set DI1 port to trigger on low level, valid signal is 100ms) **
393
394 (% style="color:blue" %)**AT+TRIG1=1,100**(%%)**  (set DI1 port to trigger on high level, valid signal is 100ms ) **
395
396 (% style="color:blue" %)**AT+TRIG2=0,100**(%%)**  (set DI2 port to trigger on low level, valid signal is 100ms) **
397
398 (% style="color:blue" %)**AT+TRIG2=1,100**(%%)**  (set DI2 port to trigger on high level, valid signal is 100ms ) **
399
400 (% style="color:blue" %)**AT+SETCNT=1,60**(%%)**   (Set COUNT1 value to 60)**
401
402 (% style="color:blue" %)**AT+SETCNT=2,60**(%%)**   (Set COUNT2 value to 60)**
403 )))
404
405
406
407 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
408
409 **LT22222-L**: This mode the DI1 is used as a counting pin.
410
411 [[image:image-20220523181246-5.png]]
412
413 (((
414 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
415 )))
416
417 [[image:image-20220523181301-6.png]]
418
419 * RO is for relay. ROx=1 : close，ROx=0 always open.
420 * FIRST: Indicate this is the first packet after join network.
421 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
422
423 (((
424 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
425 )))
426
427 (((
428 **To use counting mode, please run:**
429 )))
430
431 (% class="box infomessage" %)
432 (((
433 (((
434 **AT+MOD=3**
435
436 **ATZ**
437 )))
438 )))
439
440 (((
441 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
442 )))
443
444
445
446 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
447
448
449 **LT22222-L**: This mode the DI1 is used as a counting pin.
450
451 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.
452
453 [[image:image-20220523181903-8.png]]
454
455
456 (((
457 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
458 )))
459
460 [[image:image-20220523181727-7.png]]
461
462 * RO is for relay. ROx=1 : close，ROx=0 always open.
463 * FIRST: Indicate this is the first packet after join network.
464 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
465
466 (((
467 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
468 )))
469
470 (((
471
472
473 **To use this mode, please run:**
474 )))
475
476 (% class="box infomessage" %)
477 (((
478 (((
479 **AT+MOD=4**
480
481 **ATZ**
482 )))
483 )))
484
485
486
487 (((
488 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
489 )))
490
491 (((
492
493
494 **Plus below command for AVI1 Counting:**
495
496
497 (% style="color:blue" %)**AT+SETCNT=3,60**(%%)**  (set AVI Count to 60)**
498
499 (% style="color:blue" %)**AT+VOLMAX=20000**(%%)**  (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
500
501 (% style="color:blue" %)**AT+VOLMAX=20000,0**(%%)**  (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
502
503 (% style="color:blue" %)**AT+VOLMAX=20000,1**(%%)**  (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
504 )))
505
506
507
508 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
509
510
511 **LT22222-L**: This mode the DI1 is used as a counting pin.
512
513 [[image:image-20220523182334-9.png]]
514
515 (((
516
517
518 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
519 )))
520
521 * RO is for relay. ROx=1 : close，ROx=0 always open.
522 * FIRST: Indicate this is the first packet after join network.
523 * (((
524 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
525 )))
526
527 (((
528 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
529 )))
530
531 (((
532
533
534 **To use this mode, please run:**
535 )))
536
537 (% class="box infomessage" %)
538 (((
539 (((
540 **AT+MOD=5**
541
542 **ATZ**
543 )))
544 )))
545
546 (((
547 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
548 )))
549
550
551
552 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
553
554
555 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
556
557 For example, if user has configured below commands:
558
559 * **AT+MOD=1 ** **~-~->** The normal working mode
560 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
561
562 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
563
564 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
565 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.**
566
567
568 (% style="color:#037691" %)**AT Command to set Trigger Condition**:
569
570 (% style="color:#4f81bd" %)**Trigger base on voltage**:
571
572 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
573
574 **Example:**
575
576 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)
577
578 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
579
580
581
582 (% style="color:#4f81bd" %)**Trigger base on current**:
583
584 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
585
586 **Example:**
587
588 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
589
590
591
592 (% style="color:#4f81bd" %)**Trigger base on DI status**:
593
594 DI status trigger Flag.
595
596 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
597
598
599 **Example:**
600
601 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
602
603
604 (% style="color:#037691" %)**Downlink Command to set Trigger Condition:**
605
606 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
607
608 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
609
610 AA: Code for this downlink Command:
611
612 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
613
614 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
615
616 yy2 yy2: AC1 or AV1 high limit.
617
618 yy3 yy3: AC2 or AV2 low limit.
619
620 Yy4 yy4: AC2 or AV2 high limit.
621
622
623 **Example1**: AA 00 13 88 00 00 00 00 00 00
624
625 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
626
627
628 **Example2**: AA 02 01 00
629
630 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
631
632
633
634 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
635
636 MOD6 Payload : total 11 bytes payload
637
638 [[image:image-20220524085923-1.png]]
639
640
641 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
642
643 [[image:image-20220524090106-2.png]]
644
645 * Each bits shows if the corresponding trigger has been configured.
646
647 **Example:**
648
649 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
650
651
652 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
653
654 [[image:image-20220524090249-3.png]]
655
656 * Each bits shows which status has been trigger on this uplink.
657
658 **Example:**
659
660 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
661
662
663 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
664
665 [[image:image-20220524090456-4.png]]
666
667 * Each bits shows which status has been trigger on this uplink.
668
669 **Example:**
670
671 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
672
673 00000101: Means both DI1 and DI2 trigger are enabled.
674
675
676 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
677
678 Downlink command to poll MOD6 status:
679
680 **AB 06**
681
682 When device got this command, it will send the MOD6 payload.
683
684
685
686 === 3.3.7 Payload Decoder ===
687
688 (((
689
690
691 **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/]]
692
693
694 )))
695
696
697 == 3.4 ​Configure LT via AT or Downlink ==
698
699 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
700
701 (((
702 There are two kinds of Commands:
703 )))
704
705 * (% 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]]
706
707 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
708
709 === 3.4.1 Common Commands ===
710
711 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]]
712
713
714
715 === 3.4.2 Sensor related commands ===
716
717 ==== 3.4.2.1 Set Transmit Interval ====
718
719 Set device uplink interval.
720
721 * (% style="color:#037691" %)**AT Command:**
722
723 **AT+TDC=N **
724
725
726 **Example: **AT+TDC=30000. Means set interval to 30 seconds
727
728
729 * (% style="color:#037691" %)**Downlink Payload (prefix 0x01):**
730
731 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
732
733
734
735
736 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
737
738 Set work mode.
739
740 * (% style="color:#037691" %)**AT Command:**
741
742 **AT+MOD=N  **
743
744
745 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
746
747
748 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A):**
749
750 (% style="color:#037691" %)**​​​​​​​**(%%)**0x0A aa    ** ~/~/ Same as AT+MOD=aa
751
752
753
754
755 ==== 3.4.2.3 Poll an uplink ====
756
757 * (% style="color:#037691" %)**AT Command:**
758
759 There is no AT Command to poll uplink
760
761
762 * (% style="color:#037691" %)**Downlink Payload (prefix 0x08):**
763
764 **0x08 FF     **~/~/ Poll an uplink
765
766 **Example**: 0x08FF, ask device to send an Uplink
767
768
769
770 ==== 3.4.2.4 Enable Trigger Mode ====
771
772 Use of trigger mode, please check [[ADDMOD6>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
773
774 * (% style="color:#037691" %)**AT Command:**
775
776 **AT+ADDMOD6=1 or 0**
777
778 1: Enable Trigger Mode
779
780 0: Disable Trigger Mode
781
782
783 * (% style="color:#037691" %)**Downlink Payload (prefix 0x0A 06):**
784
785 **0x0A 06 aa    ** ~/~/ Same as AT+ADDMOD6=aa
786
787 (% class="box infomessage" %)
788 (((
789
790 )))
791
792
793
794 ==== 3.4.2.5 Poll trigger settings ====
795
796 Poll trigger settings,
797
798 * (% style="color:#037691" %)AT Command:
799
800 There is no AT Command for this feature.
801
802
803 * (% style="color:#037691" %)Downlink Payload (prefix 0x AB 06):
804
805 (% class="box infomessage" %)
806 (((
807 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
808 )))
809
810
811
812 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
813
814 Enable Disable DI1/DI2/DI2 as trigger,
815
816 * (% style="color:#037691" %)AT Command:
817
818 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
819
820
821 **Example:**
822
823 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
824
825 * (% style="color:#037691" %)Downlink Payload (prefix 0xAA 02):
826
827 **0xAA 02 aa bb        **~/~/ Same as AT+DTRI=aa,bb
828
829
830
831
832 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
833
834 Set DI1 or DI3(for LT-33222-L) trigger.
835
836 * (% style="color:#037691" %)AT Command:
837
838 **AT+TRIG1=a,b**
839
840 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
841
842 b : delay timing.
843
844
845 **Example:**
846
847 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
848
849
850 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 01 ):**
851 * **0x09 01 aa bb cc    ** ~/~/ same as AT+TRIG1=aa,0x(bb cc)
852
853
854 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
855
856 Set DI2 trigger.
857
858 * (% style="color:#037691" %)**AT Command:**
859
860 **AT+TRIG2=a,b**
861
862
863 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
864
865 b : delay timing.
866
867
868 **Example:**
869
870 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
871
872
873 * (% style="color:#037691" %)**Downlink Payload (prefix 0x09 02 ):**
874
875 **0x09 02 aa bb cc           **~/~/ same as AT+TRIG1=aa,0x(bb cc)
876
877
878
879
880 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
881
882 Set current trigger , base on AC port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
883
884 * (% style="color:#037691" %)**AT Command**
885
886 **AT+ACLIM**
887
888
889 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 01 )**
890
891 **0x AA 01 aa bb cc dd ee ff gg hh        ** ~/~/ same as AT+ACLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
892
893
894
895
896 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
897
898 Set current trigger , base on AV port. See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
899
900 * (% style="color:#037691" %)**AT Command**
901
902 **AT+AVLIM  See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]**
903
904
905 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAA 00 )**
906
907 **0x AA 00 aa bb cc dd ee ff gg hh    ** ~/~/ same as AT+AVLIM See [[trigger mode>>||anchor="H3.3.6AT2BADDMOD3D6.28TriggerMode2COptional29"]]
908
909
910
911
912 ==== 3.4.2.11 Trigger – Set minimum interval ====
913
914 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
915
916 * (% style="color:#037691" %)**AT Command**
917
918 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
919
920
921 * (% style="color:#037691" %)**Downlink Payload (prefix 0xAC )**
922
923 **0x AC aa bb   ** ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
924
925
926
927
928 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
929
930 * (% style="color:#037691" %)**AT Command**
931
932 There is no AT Command to control Digital Output
933
934
935 * (% style="color:#037691" %)**Downlink Payload (prefix 0x02)**
936 * **0x02 aa bb cc     **~/~/ Set DO1/DO2/DO3 output
937
938 (((
939 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
940 )))
941
942 (((
943 01: Low,  00: High ,  11: No action
944 )))
945
946 [[image:image-20220524092754-5.png]]
947
948 (((
949 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
950 )))
951
952 (((
953 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
954 )))
955
956
957
958
959 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
960
961 * (% style="color:#037691" %)**AT Command**
962
963 There is no AT Command to control Digital Output
964
965
966 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA9)**
967
968 **0xA9 aa bb cc     **~/~/ Set DO1/DO2/DO3 output with time control
969
970
971 This is to control the digital output time of DO pin. Include four bytes:
972
973 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
974
975 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
976
977 01: DO pins will change back to original state after timeout.
978
979 00: DO pins will change to an inverter state after timeout 
980
981
982 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
983
984 [[image:image-20220524093238-6.png]]
985
986
987 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
988
989 [[image:image-20220524093328-7.png]]
990
991
992 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
993
994 [[image:image-20220524093351-8.png]]
995
996
997 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
998
999 Latching time. Unit: ms
1000
1001 Device will upload a packet if downlink code executes successfully.
1002
1003
1004 **Example payload:**
1005
1006 **~1. A9 01 01 01 01 07 D0**
1007
1008 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1009
1010 **2. A9 01 00 01 11 07 D0**
1011
1012 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1013
1014 **3. A9 00 00 00 00 07 D0**
1015
1016 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1017
1018 **4. A9 00 11 01 00 07 D0**
1019
1020 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
1021
1022
1023
1024
1025 ==== 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ====
1026
1027 * (% style="color:#037691" %)**AT Command:**
1028
1029 There is no AT Command to control Relay Output
1030
1031
1032 * (% style="color:#037691" %)**Downlink Payload (prefix 0x03):**
1033
1034 **0x03 aa bb     **~/~/ Set RO1/RO2 output
1035
1036
1037 (((
1038 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1039 )))
1040
1041 (((
1042 01: Close ,  00: Open , 11: No action
1043 )))
1044
1045 (((
1046 [[image:image-20220524093724-9.png]]
1047 )))
1048
1049 Device will upload a packet if downlink code executes successfully.
1050
1051
1052
1053
1054 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1055
1056 * (% style="color:#037691" %)**AT Command:**
1057
1058 There is no AT Command to control Relay Output
1059
1060
1061 * (% style="color:#037691" %)**Downlink Payload (prefix 0x05):**
1062
1063 **0x05 aa bb cc dd     **~/~/ Set RO1/RO2 relay with time control
1064
1065
1066 This is to control the relay output time of relay. Include four bytes:
1067
1068 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1069
1070 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1071
1072 01: Relays will change back to original state after timeout.
1073
1074 00: Relays will change to an inverter state after timeout
1075
1076
1077 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1078
1079 [[image:image-20220524093831-10.png]]
1080
1081
1082 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1083
1084 Device will upload a packet if downlink code executes successfully.
1085
1086
1087 **Example payload:**
1088
1089 **~1. 05 01 11 07 D0**
1090
1091 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1092
1093 **2. 05 01 10 07 D0**
1094
1095 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1096
1097 **3. 05 00 01 07 D0**
1098
1099 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1100
1101 **4. 05 00 00 07 D0**
1102
1103 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1104
1105
1106
1107
1108 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1109
1110 When voltage exceed the threshold, count. Feature see [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1111
1112 * (% style="color:#037691" %)**AT Command:**
1113
1114 **AT+VOLMAX   ** ~/~/ See [[MOD4>>||anchor="H3.3.4AT2BMOD3D42CSingleDICounting2B1xVoltageCounting"]]
1115
1116
1117 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA5):**
1118
1119 **0xA5 aa bb cc   **~/~/ Same as AT+VOLMAX=(aa bb),cc
1120
1121
1122
1123
1124 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1125
1126 * (% style="color:#037691" %)**AT Command:**
1127
1128 (% style="color:#037691" %)**​​​​​​​​​​​​​​**(%%)**AT+SETCNT=aa,(bb cc dd ee) **
1129
1130 aa: 1: Set count1,
1131
1132 2: Set count2,
1133
1134 3: Set AV1 count
1135
1136 Bb cc dd ee: number to be set
1137
1138
1139 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA8):**
1140
1141 **0x A8 aa bb cc dd ee     **~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1142
1143
1144
1145
1146 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1147
1148 Clear counting for counting mode
1149
1150 * (% style="color:#037691" %)**AT Command:**
1151
1152 (% style="color:#037691" %)​​​​​​​​​​​​​​(%%)**AT+CLRCOUNT ** ~/~/ clear all counting
1153
1154
1155 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA6):**
1156
1157 **0x A6 01    ** ~/~/ clear all counting
1158
1159
1160
1161
1162 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1163
1164 * (% style="color:#037691" %)**AT Command:**
1165
1166 **AT+COUTIME=60  **~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)
1167
1168
1169 * (% style="color:#037691" %)**Downlink Payload (prefix 0xA7):**
1170
1171 **0x A7 aa bb cc     **~/~/ same as AT+COUTIME =aa bb cc,
1172
1173 (((
1174 range: aa bb cc:0 to 16777215,  (unit:second)
1175
1176
1177 )))
1178
1179
1180
1181 == 3.5 Integrate with Mydevice ==
1182
1183 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:
1184
1185 (((
1186 (% style="color:blue" %)**Step 1**(%%): Be sure that your device is programmed and properly connected to the network at this time.
1187 )))
1188
1189 (((
1190 (% 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:
1191 )))
1192
1193 [[image:1653356737703-362.png||height="232" width="732"]]
1194
1195 [[image:image-20220524094641-11.png||height="390" width="723"]]
1196
1197
1198 [[image:image-20220524094641-12.png||height="402" width="718"]]
1199
1200
1201 (% style="color:blue" %)**Step 3**(%%): Create an account or log in Mydevices.
1202
1203 (% style="color:blue" %)**Step 4**(%%): Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1204
1205 Search under The things network
1206
1207 [[image:1653356838789-523.png||height="337" width="740"]]
1208
1209
1210
1211 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1212
1213 [[image:image-20220524094909-1.png||height="335" width="729"]]
1214
1215
1216 [[image:image-20220524094909-2.png||height="337" width="729"]]
1217
1218
1219 [[image:image-20220524094909-3.png||height="338" width="727"]]
1220
1221
1222 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1223
1224
1225 [[image:image-20220524094909-5.png||height="341" width="734"]]
1226
1227
1228
1229 == 3.6 Interface Detail ==
1230
1231 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1232
1233 Support NPN Type sensor
1234
1235 [[image:1653356991268-289.png]]
1236
1237
1238
1239 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1240
1241 (((
1242 The DI port of LT-22222-L can support NPN or PNP output sensor.
1243 )))
1244
1245 (((
1246 (((
1247 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
1248 )))
1249 )))
1250
1251 [[image:1653357170703-587.png]]
1252
1253 (((
1254 (((
1255 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1256 )))
1257 )))
1258
1259 (((
1260
1261 )))
1262
1263 (((
1264 (% style="color:blue" %)**Example1**(%%): Connect to a Low active sensor.
1265 )))
1266
1267 (((
1268 This type of sensor will output a low signal GND when active.
1269 )))
1270
1271 * (((
1272 Connect sensor’s output to DI1-
1273 )))
1274 * (((
1275 Connect sensor’s VCC to DI1+.
1276 )))
1277
1278 (((
1279 So when sensor active, the current between NEC2501 pin1 and pin2 is：
1280 )))
1281
1282 (((
1283 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1284 )))
1285
1286 (((
1287 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.
1288 )))
1289
1290 (((
1291
1292 )))
1293
1294 (((
1295 (% style="color:blue" %)**Example2**(%%): Connect to a High active sensor.
1296 )))
1297
1298 (((
1299 This type of sensor will output a high signal (example 24v) when active.
1300 )))
1301
1302 * (((
1303 Connect sensor’s output to DI1+
1304 )))
1305 * (((
1306 Connect sensor’s GND DI1-.
1307 )))
1308
1309 (((
1310 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1311 )))
1312
1313 (((
1314 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 1K.**
1315 )))
1316
1317 (((
1318 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.
1319 )))
1320
1321 (((
1322
1323 )))
1324
1325 (((
1326 (% style="color:blue" %)**Example3**(%%): Connect to a 220v high active sensor.
1327 )))
1328
1329 (((
1330 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1331 )))
1332
1333 * (((
1334 Connect sensor’s output to DI1+ with a serial 50K resistor
1335 )))
1336 * (((
1337 Connect sensor’s GND DI1-.
1338 )))
1339
1340 (((
1341 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1342 )))
1343
1344 (((
1345 [[image:1653968155772-850.png||height="23" width="19"]]**= DI1+ / 51K.**
1346 )))
1347
1348 (((
1349 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.
1350 )))
1351
1352
1353
1354 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1355
1356 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1357
1358 [[image:1653357531600-905.png]]
1359
1360
1361
1362 === 3.6.4 Analog Input Interface ===
1363
1364 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:
1365
1366
1367 (% style="color:blue" %)**AC2 = (IN2 voltage )/12**
1368
1369 [[image:1653357592296-182.png]]
1370
1371 Example to connect a 4~~20mA sensor
1372
1373 We take the wind speed sensor as an example for reference only.
1374
1375
1376 **Specifications of the wind speed sensor:**
1377
1378 Red:  12~~24v
1379
1380 Yellow:  4~~20mA
1381
1382 Black:  GND
1383
1384
1385 **Connection diagram:**
1386
1387 [[image:1653357640609-758.png]]
1388
1389 [[image:1653357648330-671.png||height="155" width="733"]]
1390
1391
1392
1393 === 3.6.5 Relay Output ===
1394
1395 (((
1396 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:
1397 )))
1398
1399 [[image:image-20220524100215-9.png]]
1400
1401 [[image:image-20220524100215-10.png||height="382" width="723"]]
1402
1403
1404
1405 == 3.7 LEDs Indicators ==
1406
1407 [[image:image-20220524100748-11.png]]
1408
1409
1410 = 4. Use AT Command =
1411
1412 == 4.1 Access AT Command ==
1413
1414 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.
1415
1416 [[image:1653358238933-385.png]]
1417
1418
1419 (((
1420 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:
1421 )))
1422
1423 [[image:1653358355238-883.png]]
1424
1425
1426 (((
1427 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/]]
1428 )))
1429
1430 (((
1431 AT+<CMD>?        : Help on <CMD>
1432 )))
1433
1434 (((
1435 AT+<CMD>         : Run <CMD>
1436 )))
1437
1438 (((
1439 AT+<CMD>=<value> : Set the value
1440 )))
1441
1442 (((
1443 AT+<CMD>=?       : Get the value
1444 )))
1445
1446 (((
1447 ATZ: Trig a reset of the MCU
1448 )))
1449
1450 (((
1451 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1452 )))
1453
1454 (((
1455 AT+DEUI: Get or Set the Device EUI
1456 )))
1457
1458 (((
1459 AT+DADDR: Get or Set the Device Address
1460 )))
1461
1462 (((
1463 AT+APPKEY: Get or Set the Application Key
1464 )))
1465
1466 (((
1467 AT+NWKSKEY: Get or Set the Network Session Key
1468 )))
1469
1470 (((
1471 AT+APPSKEY: Get or Set the Application Session Key
1472 )))
1473
1474 (((
1475 AT+APPEUI: Get or Set the Application EUI
1476 )))
1477
1478 (((
1479 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1480 )))
1481
1482 (((
1483 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1484 )))
1485
1486 (((
1487 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1488 )))
1489
1490 (((
1491 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1492 )))
1493
1494 (((
1495 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1496 )))
1497
1498 (((
1499 AT+RX2FQ: Get or Set the Rx2 window frequency
1500 )))
1501
1502 (((
1503 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1504 )))
1505
1506 (((
1507 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1508 )))
1509
1510 (((
1511 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1512 )))
1513
1514 (((
1515 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1516 )))
1517
1518 (((
1519 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1520 )))
1521
1522 (((
1523 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1524 )))
1525
1526 (((
1527 AT+NWKID: Get or Set the Network ID
1528 )))
1529
1530 (((
1531 AT+FCU: Get or Set the Frame Counter Uplink
1532 )))
1533
1534 (((
1535 AT+FCD: Get or Set the Frame Counter Downlink
1536 )))
1537
1538 (((
1539 AT+CLASS: Get or Set the Device Class
1540 )))
1541
1542 (((
1543 AT+JOIN: Join network
1544 )))
1545
1546 (((
1547 AT+NJS: Get OTAA Join Status
1548 )))
1549
1550 (((
1551 AT+SENDB: Send hexadecimal data along with the application port
1552 )))
1553
1554 (((
1555 AT+SEND: Send text data along with the application port
1556 )))
1557
1558 (((
1559 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1560 )))
1561
1562 (((
1563 AT+RECV: Print last received data in raw format
1564 )))
1565
1566 (((
1567 AT+VER: Get current image version and Frequency Band
1568 )))
1569
1570 (((
1571 AT+CFM: Get or Set the confirmation mode (0-1)
1572 )))
1573
1574 (((
1575 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1576 )))
1577
1578 (((
1579 AT+SNR: Get the SNR of the last received packet
1580 )))
1581
1582 (((
1583 AT+RSSI: Get the RSSI of the last received packet
1584 )))
1585
1586 (((
1587 AT+TDC: Get or set the application data transmission interval in ms
1588 )))
1589
1590 (((
1591 AT+PORT: Get or set the application port
1592 )))
1593
1594 (((
1595 AT+DISAT: Disable AT commands
1596 )))
1597
1598 (((
1599 AT+PWORD: Set password, max 9 digits
1600 )))
1601
1602 (((
1603 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1604 )))
1605
1606 (((
1607 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1608 )))
1609
1610 (((
1611 AT+CFG: Print all settings
1612
1613
1614 )))
1615
1616
1617
1618 == 4.2 Common AT Command Sequence ==
1619
1620 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1621
1622 (((
1623
1624
1625 **If device has not joined network yet:**
1626 )))
1627
1628 (((
1629 (% style="background-color:#dcdcdc" %)123456
1630 )))
1631
1632 (((
1633 (% style="background-color:#dcdcdc" %)AT+FDR
1634 )))
1635
1636 (((
1637 (% style="background-color:#dcdcdc" %)123456
1638 )))
1639
1640 (((
1641 (% style="background-color:#dcdcdc" %)AT+NJM=0
1642 )))
1643
1644 (((
1645 (% style="background-color:#dcdcdc" %)ATZ
1646 )))
1647
1648
1649 (((
1650 **If device already joined network:**
1651 )))
1652
1653 (((
1654 (% style="background-color:#dcdcdc" %)AT+NJM=0
1655 )))
1656
1657 (((
1658 (% style="background-color:#dcdcdc" %)ATZ
1659
1660
1661 )))
1662
1663
1664
1665 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1666
1667 (((
1668
1669
1670 (% style="background-color:#dcdcdc" %)123456(%%)  Enter Password to have AT access.
1671 )))
1672
1673 (((
1674 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1675 )))
1676
1677 (((
1678 (% style="background-color:#dcdcdc" %) 123456(%%)  Enter Password to have AT access.
1679 )))
1680
1681 (((
1682 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1683 )))
1684
1685 (((
1686 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%)  Set to ABP mode
1687 )))
1688
1689 (((
1690 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%)  Set the Adaptive Data Rate Off
1691 )))
1692
1693 (((
1694 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1695 )))
1696
1697 (((
1698 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1699 )))
1700
1701 (((
1702 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1703 )))
1704
1705 (((
1706 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%)  Set RX2Frequency to 868.4Mhz (according to the result from server)
1707 )))
1708
1709 (((
1710 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1711 )))
1712
1713 (((
1714 (% 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.
1715 )))
1716
1717 (((
1718 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1719
1720
1721 )))
1722
1723 (((
1724 (% style="color:red" %)**Note:**
1725 )))
1726
1727 (((
1728 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1729 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1730 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.
1731 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
1732 )))
1733
1734 (((
1735 [[image:1653359097980-169.png||height="188" width="729"]]
1736 )))
1737
1738 (((
1739
1740 )))
1741
1742
1743 === 4.2.3 Change to Class A ===
1744
1745 If sensor JOINED
1746 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1747 ATZ
1748
1749
1750 = 5. FAQ =
1751
1752 == 5.1 How to upgrade the image? ==
1753
1754
1755 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1756
1757 * Support new features
1758 * For bug fix
1759 * Change LoRaWAN bands.
1760
1761 Below shows the hardware connection for how to upload an image to the LT:
1762
1763 [[image:1653359603330-121.png]]
1764
1765
1766 (((
1767 (% 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]].
1768 (% 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/]].
1769 (% style="color:blue" %)**Step3**(%%)**:** Open flashloader; choose the correct COM port to update.
1770
1771
1772 (% style="color:blue" %)**For LT-22222-L**(%%):
1773 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.
1774 )))
1775
1776 [[image:image-20220524103407-12.png]]
1777
1778 [[image:image-20220524103429-13.png]]
1779
1780 [[image:image-20220524104033-15.png]]
1781
1782
1783 (% 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:
1784
1785 [[image:1653360054704-518.png||height="186" width="745"]]
1786
1787
1788 (((
1789 (((
1790
1791
1792 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1793 )))
1794 )))
1795
1796 (((
1797 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1798 )))
1799
1800 (((
1801
1802
1803 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1804 )))
1805
1806 (((
1807 (((
1808 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1809 )))
1810 )))
1811
1812 (((
1813 (((
1814 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1815
1816
1817 )))
1818 )))
1819
1820 (((
1821 (% 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.
1822 )))
1823
1824 (((
1825 [[image:1653360231087-571.png||height="401" width="727"]]
1826 )))
1827
1828 (((
1829 (% 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.
1830 )))
1831
1832
1833 (((
1834 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1835 )))
1836
1837 (((
1838 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1839 (% style="background-color:#dcdcdc" %)AT+FDR(%%)  Reset Parameters to Factory Default, Keys Reserve
1840 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1841 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%) Set to ABP mode
1842 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%) Set the Adaptive Data Rate Off
1843 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1844 (% style="background-color:#dcdcdc" %)AT+TDC=60000 (%%) Set transmit interval to 60 seconds
1845 (% style="background-color:#dcdcdc" %)AT+CHS=868400000(%%)  Set transmit frequency to 868.4Mhz
1846 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%)  Set Device Address to 26 01 1A F1
1847 (% style="background-color:#dcdcdc" %)ATZ        (%%) Reset MCU
1848 )))
1849
1850
1851 (((
1852 As shown in below:
1853 )))
1854
1855 [[image:1653360498588-932.png||height="485" width="726"]]
1856
1857
1858 == 5.4 Can I see counting event in Serial? ==
1859
1860 (((
1861 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.
1862
1863
1864 == 5.5 Can i use point to point communication for LT-22222-L? ==
1865
1866 Yes, please refer [[Point to Point Communication>>doc:Main. Point to Point Communication of LT-22222-L.WebHome]]
1867 )))
1868
1869 (((
1870 == 5.6 Why does the relay output become the default and open relay after the lt22222 is powered off? ==
1871
1872 If the device is not shut down, but directly powered off.
1873
1874 It will default that this is a power-off state.
1875
1876 In modes 2 to 5, DO RO status and pulse count are saved in flash.
1877
1878 After restart, the status before power failure will be read from flash.
1879
1880 = 6. Trouble Shooting =
1881 )))
1882
1883 (((
1884 (((
1885 == 6.1 Downlink doesn’t work, how to solve it? ==
1886 )))
1887 )))
1888
1889 (((
1890 Please see this link for how to debug: [[LoRaWAN Communication Debug>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H5.1Howitwork"]]
1891 )))
1892
1893 (((
1894
1895
1896 == 6.2 Have trouble to upload image. ==
1897 )))
1898
1899 (((
1900 See this link for trouble shooting: [[Firmware Upgrade Instruction>>doc:Main.Firmware Upgrade Instruction for STM32 base products.WebHome]]
1901 )))
1902
1903 (((
1904
1905
1906 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1907 )))
1908
1909 (((
1910 It might be about the channels mapping. [[Please see this link for detail>>doc:Main.LoRaWAN Communication Debug.WebHome||anchor="H2.NoticeofUS9152FCN4702FAU915Frequencyband"]]
1911 )))
1912
1913
1914
1915 = 7. Order Info =
1916
1917
1918 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1919
1920
1921 (% style="color:#4f81bd" %)**XXX:**
1922
1923 * (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1924 * (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1925 * (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1926 * (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1927 * (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1928 * (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1929 * (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1930 * (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1931 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1932
1933 = 8. Packing Info =
1934
1935
1936 **Package Includes**:
1937
1938 * LT-22222-L I/O Controller x 1
1939 * Stick Antenna for LoRa RF part x 1
1940 * Bracket for controller x1
1941 * Program cable x 1
1942
1943 **Dimension and weight**:
1944
1945 * Device Size: 13.5 x 7 x 3 cm
1946 * Device Weight: 105g
1947 * Package Size / pcs : 14.5 x 8 x 5 cm
1948 * Weight / pcs : 170g
1949
1950 = 9. Support =
1951
1952 * (((
1953 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.
1954 )))
1955 * (((
1956 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]]
1957 )))
1958
1959 = 10. Reference​​​​​ =
1960
1961 * 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]]
1962 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
1963 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1964 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]