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Version 66.20 by Xiaoling on 2022/05/24 13:53
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1 (% style="text-align:center" %)
2 [[image:image-20220523163353-1.jpeg||height="604" width="500"]]
3
4 **LT-22222-L LoRa IO Controller User Manual **
5
6
7 **Table of Contents:**
8
9 {{toc/}}
10
11
12
13
14 = 1.Introduction =
15
16 == 1.1 What is LT Series I/O Controller ==
17
18 (((
19 The Dragino LT series I/O Modules are Long Range LoRaWAN I/O Controller. It contains different I/O Interfaces such as: analog current Input, analog voltage input, relay output, digital input and 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 a simple plug and play, low cost installation by using LoRaWAN 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 == 1.2  Specifications ==
47
48 (((
49 **Hardware System:**
50 )))
51
52 * (((
53 STM32L072CZT6 MCU
54 )))
55 * (((
56 SX1276/78 Wireless Chip 
57 )))
58 * (((
59 (((
60 Power Consumption:
61 )))
62
63 * (((
64 Idle: 4mA@12v
65 )))
66 * (((
67 20dB Transmit: 34mA@12v
68 )))
69 )))
70
71 (((
72 **Interface for Model: LT22222-L:**
73 )))
74
75 * (((
76 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
77 )))
78 * (((
79 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
80 )))
81 * (((
82 2 x Relay Output (5A@250VAC / 30VDC)
83 )))
84 * (((
85 2 x 0~~20mA Analog Input (res:0.01mA)
86 )))
87 * (((
88 2 x 0~~30V Analog Input (res:0.01v)
89 )))
90 * (((
91 Power Input 7~~ 24V DC. 
92 )))
93
94 (((
95 **LoRa Spec:**
96 )))
97
98 * (((
99 (((
100 Frequency Range:
101 )))
102
103 * (((
104 Band 1 (HF): 862 ~~ 1020 Mhz
105 )))
106 * (((
107 Band 2 (LF): 410 ~~ 528 Mhz
108 )))
109 )))
110 * (((
111 168 dB maximum link budget.
112 )))
113 * (((
114 +20 dBm - 100 mW constant RF output vs.
115 )))
116 * (((
117 +14 dBm high efficiency PA.
118 )))
119 * (((
120 Programmable bit rate up to 300 kbps.
121 )))
122 * (((
123 High sensitivity: down to -148 dBm.
124 )))
125 * (((
126 Bullet-proof front end: IIP3 = -12.5 dBm.
127 )))
128 * (((
129 Excellent blocking immunity.
130 )))
131 * (((
132 Low RX current of 10.3 mA, 200 nA register retention.
133 )))
134 * (((
135 Fully integrated synthesizer with a resolution of 61 Hz.
136 )))
137 * (((
138 FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
139 )))
140 * (((
141 Built-in bit synchronizer for clock recovery.
142 )))
143 * (((
144 Preamble detection.
145 )))
146 * (((
147 127 dB Dynamic Range RSSI.
148 )))
149 * (((
150 Automatic RF Sense and CAD with ultra-fast AFC.
151 )))
152 * (((
153 Packet engine up to 256 bytes with CRC.
154 )))
155
156 == 1.3 Features ==
157
158 * LoRaWAN Class A & Class C protocol
159 * Optional Customized LoRa Protocol
160 * Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
161 * AT Commands to change parameters
162 * Remote configure parameters via LoRa Downlink
163 * Firmware upgradable via program port
164 * Counting
165
166 == 1.4  Applications ==
167
168 * Smart Buildings & Home Automation
169 * Logistics and Supply Chain Management
170 * Smart Metering
171 * Smart Agriculture
172 * Smart Cities
173 * Smart Factory
174
175 == 1.5 Hardware Variants ==
176
177 (% border="1" style="background-color:#f7faff; width:500px" %)
178 |(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:334px" %)**Description**
179 |(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:334px" %)(((
180 * 2 x Digital Input (Bi-direction)
181 * 2 x Digital Output
182 * 2 x Relay Output (5A@250VAC / 30VDC)
183 * 2 x 0~~20mA Analog Input (res:0.01mA)
184 * 2 x 0~~30V Analog Input (res:0.01v)
185 * 1 x Counting Port
186 )))
187
188 = 2. Power ON Device =
189
190 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.
191
192 (((
193 PWR will on when device is properly powered.
194 )))
195
196 [[image:1653297104069-180.png]]
197
198 = 3. Operation Mode =
199
200 == 3.1 How it works? ==
201
202 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. 
203
204 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>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H4.UseATCommand]] to set the keys in the devices.
205
206 3.2 Example to join LoRaWAN network
207
208 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. 
209
210 [[image:image-20220523172350-1.png||height="266" width="864"]]
211
212
213 (((
214 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:
215 )))
216
217 (((
218 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
219 )))
220
221 (((
222 Each LT is shipped with a sticker with the default device EUI as below:
223 )))
224
225 [[image:1653297924498-393.png]]
226
227 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
228
229 Add APP EUI in the application.
230
231 [[image:1653297955910-247.png||height="321" width="716"]]
232
233 Add APP KEY and DEV EUI
234
235 [[image:1653298023685-319.png]]
236
237 (((
238 **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.
239 )))
240
241 [[image:1653298044601-602.png||height="405" width="709"]]
242
243 == 3.3 Uplink Payload ==
244
245 There are five working modes + one interrupt mode on LT for different type application:
246
247 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
248 * **MOD2**: Double DI Counting + DO + RO
249 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
250 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
251 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
252 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
253
254 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
255
256 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
257
258 [[image:image-20220523174024-3.png]]
259
260 (((
261 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
262 )))
263
264 [[image:image-20220523174254-4.png]]
265
266 * RO is for relay. ROx=1 : close，ROx=0 always open.
267 * DI is for digital input. DIx=1: high or float, DIx=0: low.
268 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
269
270 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
271
272 For example if payload is: [[image:image-20220523175847-2.png]]
273
274 **The value for the interface is:  **
275
276 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
277
278 AVI2 channel voltage is 0x04AC/1000=1.196V
279
280 ACI1 channel current is 0x1310/1000=4.880mA
281
282 ACI2 channel current is 0x1300/1000=4.864mA
283
284 The last byte 0xAA= 10101010(B) means
285
286 * [1] RO1 relay channel is close and the RO1 LED is ON.
287 * [0] RO2 relay channel is open and RO2 LED is OFF;
288
289 **LT22222-L:**
290
291 * [1] DI2 channel is high input and DI2 LED is ON;
292 * [0] DI1 channel is low input;
293
294 * [0] DO3 channel output state
295 ** DO3 is float in case no load between DO3 and V+.;
296 ** DO3 is high in case there is load between DO3 and V+.
297 ** DO3 LED is off in both case
298 * [1] DO2 channel output is low and DO2 LED is ON.
299 * [0] DO1 channel output state
300 ** DO1 is float in case no load between DO1 and V+.;
301 ** DO1 is high in case there is load between DO1 and V+.
302 ** DO1 LED is off in both case
303
304 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
305
306 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
307
308 Total : 11 bytes payload
309
310 [[image:image-20220523180452-3.png]]
311
312 (((
313 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
314 )))
315
316 [[image:image-20220523180506-4.png]]
317
318 * RO is for relay. ROx=1 : close，ROx=0 always open.
319 * FIRST: Indicate this is the first packet after join network.
320 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
321
322 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
323
324 **To use counting mode, please run:**
325
326 (% class="box infomessage" %)
327 (((
328 **AT+MOD=2**
329 )))
330
331 (% class="box infomessage" %)
332 (((
333 **ATZ**
334 )))
335
336 (% style="color:#4f81bd" %)**AT Commands for counting:**
337
338 **For LT22222-L:**
339
340 (% class="box infomessage" %)
341 (((
342 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
343 )))
344
345 (% class="box infomessage" %)
346 (((
347 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
348 )))
349
350 (% class="box infomessage" %)
351 (((
352 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
353 )))
354
355 (% class="box infomessage" %)
356 (((
357 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
358 )))
359
360 (% class="box infomessage" %)
361 (((
362 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
363 )))
364
365 (% class="box infomessage" %)
366 (((
367 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
368 )))
369
370 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
371
372 **LT22222-L**: This mode the DI1 is used as a counting pin.
373
374 [[image:image-20220523181246-5.png]]
375
376 (((
377 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
378 )))
379
380 [[image:image-20220523181301-6.png]]
381
382 * RO is for relay. ROx=1 : close，ROx=0 always open.
383 * FIRST: Indicate this is the first packet after join network.
384 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
385
386 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
387
388 **To use counting mode, please run:**
389
390 (% class="box infomessage" %)
391 (((
392 **AT+MOD=3**
393 )))
394
395 (% class="box infomessage" %)
396 (((
397 **ATZ**
398 )))
399
400 Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
401
402 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
403
404 **LT22222-L**: This mode the DI1 is used as a counting pin.
405
406 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.
407
408 [[image:image-20220523181903-8.png]]
409
410 (((
411 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
412 )))
413
414 [[image:image-20220523181727-7.png]]
415
416 * RO is for relay. ROx=1 : close，ROx=0 always open.
417 * FIRST: Indicate this is the first packet after join network.
418 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
419
420 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
421
422 **To use this mode, please run:**
423
424 (% class="box infomessage" %)
425 (((
426 **AT+MOD=4**
427 )))
428
429 (% class="box infomessage" %)
430 (((
431 **ATZ**
432 )))
433
434
435 Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
436
437 **Plus below command for AVI1 Counting:**
438
439 (% class="box infomessage" %)
440 (((
441 **AT+SETCNT=3,60   (set AVI Count to 60)**
442 )))
443
444 (% class="box infomessage" %)
445 (((
446 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
447 )))
448
449 (% class="box infomessage" %)
450 (((
451 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
452 )))
453
454 (% class="box infomessage" %)
455 (((
456 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
457 )))
458
459 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
460
461 **LT22222-L**: This mode the DI1 is used as a counting pin.
462
463 [[image:image-20220523182334-9.png]]
464
465 (((
466 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
467 )))
468
469 * RO is for relay. ROx=1 : close，ROx=0 always open.
470 * FIRST: Indicate this is the first packet after join network.
471 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
472
473 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
474
475 **To use this mode, please run:**
476
477 (% class="box infomessage" %)
478 (((
479 **AT+MOD=5**
480 )))
481
482 (% class="box infomessage" %)
483 (((
484 **ATZ**
485 )))
486
487 Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H3.3.2AT2BMOD3D22C28DoubleDICounting29]].
488
489 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
490
491 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
492
493 For example, if user has configured below commands:
494
495 * **AT+MOD=1 ** **~-~->** The normal working mode
496 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
497
498 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
499
500 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
501 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.**
502
503 **AT Command to set Trigger Condition**:
504
505 (% style="color:#4f81bd" %)**Trigger base on voltage**:
506
507 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
508
509 **Example:**
510
511 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)
512
513 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
514
515 (% style="color:#4f81bd" %)**Trigger base on current**:
516
517 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
518
519 **Example:**
520
521 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
522
523 (% style="color:#4f81bd" %)**Trigger base on DI status**:
524
525 DI status trigger Flag.
526
527 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
528
529 **Example:**
530
531 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
532
533
534 **Downlink Command to set Trigger Condition**
535
536 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
537
538 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
539
540 AA: Code for this downlink Command:
541
542 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
543
544 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
545
546 yy2 yy2: AC1 or AV1 high limit.
547
548 yy3 yy3: AC2 or AV2 low limit.
549
550 Yy4 yy4: AC2 or AV2 high limit.
551
552 **Example1**: AA 00 13 88 00 00 00 00 00 00
553
554 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
555
556 **Example2**: AA 02 01 00
557
558 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
559
560 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
561
562 MOD6 Payload : total 11 bytes payload
563
564 [[image:image-20220524085923-1.png]]
565
566 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
567
568 [[image:image-20220524090106-2.png]]
569
570 * Each bits shows if the corresponding trigger has been configured.
571
572 **Example:**
573
574 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
575
576
577 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
578
579 [[image:image-20220524090249-3.png]]
580
581 * Each bits shows which status has been trigger on this uplink.
582
583 **Example:**
584
585 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
586
587
588 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
589
590 [[image:image-20220524090456-4.png]]
591
592 * Each bits shows which status has been trigger on this uplink.
593
594 **Example:**
595
596 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
597
598 00000101: Means both DI1 and DI2 trigger are enabled.
599
600
601 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
602
603 Downlink command to poll MOD6 status:
604
605 **AB 06**
606
607 When device got this command, it will send the MOD6 payload.
608
609 === 3.3.7 Payload Decoder ===
610
611 (((
612 **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/]]
613 )))
614
615 == 3.4 ​Configure LT via AT or Downlink ==
616
617 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
618
619 (((
620 There are two kinds of Commands:
621 )))
622
623 * (% 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
624
625 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
626
627 === 3.4.1 Common Commands ===
628
629 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>>http://8.211.40.43:8080/xwiki/bin/view/Main/End%20Device%20AT%20Commands%20and%20Downlink%20Command/]]
630
631 === 3.4.2 Sensor related commands ===
632
633 ==== 3.4.2.1 Set Transmit Interval ====
634
635 Set device uplink interval.
636
637 * AT Command:
638
639 (% class="box infomessage" %)
640 (((
641 **AT+TDC=N **
642 )))
643
644 **Example: **AT+TDC=30000. Means set interval to 30 seconds
645
646 * Downlink Payload (prefix 0x01):
647
648 (% class="box infomessage" %)
649 (((
650 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
651 )))
652
653 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
654
655 Set work mode.
656
657 * AT Command:
658
659 (% class="box infomessage" %)
660 (((
661 **AT+MOD=N  **
662 )))
663
664 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
665
666 * Downlink Payload (prefix 0x0A):
667
668 (% class="box infomessage" %)
669 (((
670 **0x0A aa     ~/~/ Same as AT+MOD=aa**
671 )))
672
673 ==== 3.4.2.3 Poll an uplink ====
674
675 * AT Command:
676
677 There is no AT Command to poll uplink
678
679 * Downlink Payload (prefix 0x08):
680
681 (% class="box infomessage" %)
682 (((
683 **0x08 FF     ~/~/ Poll an uplink,**
684 )))
685
686 **Example**: 0x08FF, ask device to send an Uplink
687
688 ==== 3.4.2.4 Enable Trigger Mode ====
689
690 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]]
691
692 * AT Command:
693
694 (% class="box infomessage" %)
695 (((
696 **AT+ADDMOD6=1 or 0**
697 )))
698
699 1: Enable Trigger Mode
700
701 0: Disable Trigger Mode
702
703 * Downlink Payload (prefix 0x0A 06):
704
705 (% class="box infomessage" %)
706 (((
707 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
708 )))
709
710 ==== 3.4.2.5 Poll trigger settings ====
711
712 Poll trigger settings,
713
714 * AT Command:
715
716 There is no AT Command for this feature.
717
718 * Downlink Payload (prefix 0x AB 06):
719
720 (% class="box infomessage" %)
721 (((
722 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
723 )))
724
725 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
726
727 Enable Disable DI1/DI2/DI2 as trigger,
728
729 * AT Command:
730
731 (% class="box infomessage" %)
732 (((
733 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
734 )))
735
736 **Example:**
737
738 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
739
740 * Downlink Payload (prefix 0xAA 02):
741
742 (% class="box infomessage" %)
743 (((
744 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
745 )))
746
747 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
748
749 Set DI1 or DI3(for LT-33222-L) trigger.
750
751 * AT Command:
752
753 (% class="box infomessage" %)
754 (((
755 **AT+TRIG1=a,b**
756 )))
757
758 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
759
760 b : delay timing.
761
762 **Example:**
763
764 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
765
766 * Downlink Payload (prefix 0x09 01 ):
767
768 (% class="box infomessage" %)
769 (((
770 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
771 )))
772
773 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
774
775 Set DI2 trigger.
776
777 * AT Command:
778
779 (% class="box infomessage" %)
780 (((
781 **AT+TRIG2=a,b**
782 )))
783
784 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
785
786 b : delay timing.
787
788 **Example:**
789
790 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
791
792 * Downlink Payload (prefix 0x09 02 ):
793
794 (% class="box infomessage" %)
795 (((
796 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
797 )))
798
799 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
800
801 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]]
802
803 * AT Command:
804
805 (% class="box infomessage" %)
806 (((
807 **AT+ACLIM. **
808 )))
809
810 * Downlink Payload (prefix 0xAA 01 ):
811
812 (% class="box infomessage" %)
813 (((
814 **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]]**
815 )))
816
817 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
818
819 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]]
820
821 * AT Command:
822
823 (% class="box infomessage" %)
824 (((
825 **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]]**
826 )))
827
828 * Downlink Payload (prefix 0xAA 00 ):
829
830 (% class="box infomessage" %)
831 (((
832 **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]] **
833 )))
834
835 ==== 3.4.2.11 Trigger – Set minimum interval ====
836
837 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
838
839 * AT Command:
840
841 (% class="box infomessage" %)
842 (((
843 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
844 )))
845
846 * Downlink Payload (prefix 0xAC ):
847
848 (% class="box infomessage" %)
849 (((
850 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
851 )))
852
853 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
854
855 * AT Command:
856
857 There is no AT Command to control Digital Output
858
859 * Downlink Payload (prefix 0x02):
860
861 (% class="box infomessage" %)
862 (((
863 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
864 )))
865
866 (((
867 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
868 )))
869
870 (((
871 01: Low,  00: High ,  11: No action
872 )))
873
874 [[image:image-20220524092754-5.png]]
875
876 (((
877 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
878 )))
879
880 (((
881 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
882 )))
883
884
885 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
886
887 * AT Command:
888
889 There is no AT Command to control Digital Output
890
891 * Downlink Payload (prefix 0xA9):
892
893 (% class="box infomessage" %)
894 (((
895 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
896 )))
897
898 This is to control the digital output time of DO pin. Include four bytes:
899
900 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
901
902 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
903
904 01: DO pins will change back to original state after timeout.
905
906 00: DO pins will change to an inverter state after timeout 
907
908 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
909
910 [[image:image-20220524093238-6.png]]
911
912 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
913
914 [[image:image-20220524093328-7.png]]
915
916 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
917
918 [[image:image-20220524093351-8.png]]
919
920 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
921
922 Latching time. Unit: ms
923
924 Device will upload a packet if downlink code executes successfully.
925
926 **Example payload:**
927
928 **~1. A9 01 01 01 01 07 D0**
929
930 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
931
932 **2. A9 01 00 01 11 07 D0**
933
934 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
935
936 **3. A9 00 00 00 00 07 D0**
937
938 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
939
940 **4. A9 00 11 01 00 07 D0**
941
942 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
943
944
945 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
946
947 * AT Command:
948
949 There is no AT Command to control Relay Output
950
951 * Downlink Payload (prefix 0x03):
952
953 (% class="box infomessage" %)
954 (((
955 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
956 )))
957
958 (((
959 If payload = 0x030100, it means set RO1 to close and RO2 to open.
960 )))
961
962 (((
963 01: Close ,  00: Open , 11: No action
964 )))
965
966 (((
967 [[image:image-20220524093724-9.png]]
968 )))
969
970 Device will upload a packet if downlink code executes successfully.
971
972
973 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
974
975 * AT Command:
976
977 There is no AT Command to control Relay Output
978
979 * Downlink Payload (prefix 0x05):
980
981 (% class="box infomessage" %)
982 (((
983 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
984 )))
985
986 This is to control the relay output time of relay. Include four bytes:
987
988 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
989
990 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
991
992 01: Relays will change back to original state after timeout.
993
994 00: Relays will change to an inverter state after timeout
995
996 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
997
998 [[image:image-20220524093831-10.png]]
999
1000 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1001
1002 Device will upload a packet if downlink code executes successfully.
1003
1004 **Example payload:**
1005
1006 **~1. 05 01 11 07 D0**
1007
1008 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1009
1010 **2. 05 01 10 07 D0**
1011
1012 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1013
1014 **3. 05 00 01 07 D0**
1015
1016 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1017
1018 **4. 05 00 00 07 D0**
1019
1020 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1021
1022
1023 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1024
1025 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]]
1026
1027 * AT Command:
1028
1029 (% class="box infomessage" %)
1030 (((
1031 **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]]**
1032 )))
1033
1034 * Downlink Payload (prefix 0xA5):
1035
1036 (% class="box infomessage" %)
1037 (((
1038 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1039 )))
1040
1041 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1042
1043 * AT Command:
1044
1045 (% class="box infomessage" %)
1046 (((
1047 **AT+SETCNT=aa,(bb cc dd ee) **
1048 )))
1049
1050 aa: 1: Set count1,
1051
1052 2: Set count2,
1053
1054 3: Set AV1 count
1055
1056 Bb cc dd ee: number to be set
1057
1058 * Downlink Payload (prefix 0xA8):
1059
1060 (% class="box infomessage" %)
1061 (((
1062 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1063 )))
1064
1065 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1066
1067 Clear counting for counting mode
1068
1069 * AT Command:
1070
1071 (% class="box infomessage" %)
1072 (((
1073 **AT+CLRCOUNT ~/~/ clear all counting**
1074 )))
1075
1076 * Downlink Payload (prefix 0xA6):
1077
1078 (% class="box infomessage" %)
1079 (((
1080 **0x A6 01     ~/~/ clear all counting,**
1081 )))
1082
1083 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1084
1085 * AT Command:
1086
1087 (% class="box infomessage" %)
1088 (((
1089 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1090 )))
1091
1092 * Downlink Payload (prefix 0xA7):
1093
1094 (% class="box infomessage" %)
1095 (((
1096 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1097 )))
1098
1099 range: aa bb cc:0 to 16777215,  (unit:second)
1100
1101 == 3.5 Integrate with Mydevice ==
1102
1103 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:
1104
1105 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1106
1107 **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:
1108
1109 [[image:1653356737703-362.png||height="232" width="732"]]
1110
1111 [[image:image-20220524094641-11.png||height="390" width="723"]]
1112
1113
1114 [[image:image-20220524094641-12.png||height="402" width="718"]]
1115
1116 **Step 3**: Create an account or log in Mydevices.
1117
1118 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1119
1120 Search under The things network
1121
1122 [[image:1653356838789-523.png||height="337" width="740"]]
1123
1124 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1125
1126 [[image:image-20220524094909-1.png||height="335" width="729"]]
1127
1128 [[image:image-20220524094909-2.png||height="337" width="729"]]
1129
1130 [[image:image-20220524094909-3.png||height="338" width="727"]]
1131
1132 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1133
1134 [[image:image-20220524094909-5.png||height="341" width="734"]]
1135
1136 == 3.6 Interface Detail ==
1137
1138 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1139
1140 Support NPN Type sensor
1141
1142 [[image:1653356991268-289.png]]
1143
1144 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1145
1146 (((
1147 The DI port of LT-22222-L can support NPN or PNP output sensor.
1148 )))
1149
1150 (((
1151 (((
1152 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
1153 )))
1154 )))
1155
1156 [[image:1653357170703-587.png]]
1157
1158 (((
1159 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1160 )))
1161
1162
1163 **Example1**: Connect to a Low active sensor.
1164
1165 This type of sensor will output a low signal GND when active.
1166
1167 * Connect sensor’s output to DI1-
1168 * Connect sensor’s VCC to DI1+.
1169
1170 So when sensor active, the current between NEC2501 pin1 and pin2 is： ​​
1171
1172 //IF// = DI1+ / 1K.
1173
1174 If DI1+ = 12v, the //IF// = 12mA , So the LT-22222-L will be able to detect this active signal.
1175
1176
1177 **Example2**: Connect to a High active sensor.
1178
1179 This type of sensor will output a high signal (example 24v) when active.
1180
1181 * Connect sensor’s output to DI1+
1182 * Connect sensor’s GND DI1-.
1183
1184 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1185
1186 [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]** [[image:image-20220524095628-8.png]]= DI1+ / 1K.**
1187
1188 If **DI1+ = 24v**, the [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**[[image:image-20220524095628-8.png]]** = 24mA , So the LT-22222-L will be able to detect this high active signal.
1189
1190
1191 **Example3**: Connect to a 220v high active sensor.
1192
1193 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1194
1195 * Connect sensor’s output to DI1+ with a serial 50K resistor
1196 * Connect sensor’s GND DI1-.
1197
1198 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1199
1200 [[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]][[image:/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/WebHome/image-20220524095628-8.png?rev=1.1||alt="image-20220524095628-8.png"]]**[[image:image-20220524095628-8.png]] = DI1+ / 51K.**
1201
1202 If sensor output is 220v, the (% 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.
1203
1204 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1205
1206 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1207
1208 [[image:1653357531600-905.png]]
1209
1210 === 3.6.4 Analog Input Interface ===
1211
1212 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:
1213
1214 **AC2 = (IN2 voltage )/12**
1215
1216 [[image:1653357592296-182.png]]
1217
1218 Example to connect a 4~~20mA sensor
1219
1220 We take the wind speed sensor as an example for reference only.
1221
1222 Specifications of the wind speed sensor:
1223
1224 Red:12~~24v
1225
1226 Yellow:4~~20mA
1227
1228 Black:GND
1229
1230
1231 Connection diagram:
1232
1233 [[image:1653357640609-758.png]]
1234
1235 [[image:1653357648330-671.png||height="155" width="733"]]
1236
1237 === 3.6.5 Relay Output ===
1238
1239 (((
1240 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:
1241 )))
1242
1243 [[image:image-20220524100215-9.png]]
1244
1245 [[image:image-20220524100215-10.png||height="382" width="723"]]
1246
1247 == 3.7 LEDs Indicators ==
1248
1249 [[image:image-20220524100748-11.png]]
1250
1251 = 4. Use AT Command =
1252
1253 == 4.1 Access AT Command ==
1254
1255 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.
1256
1257 [[image:1653358238933-385.png]]
1258
1259 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:
1260
1261 [[image:1653358355238-883.png]]
1262
1263 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/]]
1264
1265 (((
1266 AT+<CMD>?        : Help on <CMD>
1267 )))
1268
1269 (((
1270 AT+<CMD>         : Run <CMD>
1271 )))
1272
1273 (((
1274 AT+<CMD>=<value> : Set the value
1275 )))
1276
1277 (((
1278 AT+<CMD>=?       : Get the value
1279 )))
1280
1281 (((
1282 ATZ: Trig a reset of the MCU
1283 )))
1284
1285 (((
1286 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1287 )))
1288
1289 (((
1290 AT+DEUI: Get or Set the Device EUI
1291 )))
1292
1293 (((
1294 AT+DADDR: Get or Set the Device Address
1295 )))
1296
1297 (((
1298 AT+APPKEY: Get or Set the Application Key
1299 )))
1300
1301 (((
1302 AT+NWKSKEY: Get or Set the Network Session Key
1303 )))
1304
1305 (((
1306 AT+APPSKEY: Get or Set the Application Session Key
1307 )))
1308
1309 (((
1310 AT+APPEUI: Get or Set the Application EUI
1311 )))
1312
1313 (((
1314 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1315 )))
1316
1317 (((
1318 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1319 )))
1320
1321 (((
1322 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1323 )))
1324
1325 (((
1326 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1327 )))
1328
1329 (((
1330 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1331 )))
1332
1333 (((
1334 AT+RX2FQ: Get or Set the Rx2 window frequency
1335 )))
1336
1337 (((
1338 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1339 )))
1340
1341 (((
1342 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1343 )))
1344
1345 (((
1346 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1347 )))
1348
1349 (((
1350 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1351 )))
1352
1353 (((
1354 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1355 )))
1356
1357 (((
1358 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1359 )))
1360
1361 (((
1362 AT+NWKID: Get or Set the Network ID
1363 )))
1364
1365 (((
1366 AT+FCU: Get or Set the Frame Counter Uplink
1367 )))
1368
1369 (((
1370 AT+FCD: Get or Set the Frame Counter Downlink
1371 )))
1372
1373 (((
1374 AT+CLASS: Get or Set the Device Class
1375 )))
1376
1377 (((
1378 AT+JOIN: Join network
1379 )))
1380
1381 (((
1382 AT+NJS: Get OTAA Join Status
1383 )))
1384
1385 (((
1386 AT+SENDB: Send hexadecimal data along with the application port
1387 )))
1388
1389 (((
1390 AT+SEND: Send text data along with the application port
1391 )))
1392
1393 (((
1394 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1395 )))
1396
1397 (((
1398 AT+RECV: Print last received data in raw format
1399 )))
1400
1401 (((
1402 AT+VER: Get current image version and Frequency Band
1403 )))
1404
1405 (((
1406 AT+CFM: Get or Set the confirmation mode (0-1)
1407 )))
1408
1409 (((
1410 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1411 )))
1412
1413 (((
1414 AT+SNR: Get the SNR of the last received packet
1415 )))
1416
1417 (((
1418 AT+RSSI: Get the RSSI of the last received packet
1419 )))
1420
1421 (((
1422 AT+TDC: Get or set the application data transmission interval in ms
1423 )))
1424
1425 (((
1426 AT+PORT: Get or set the application port
1427 )))
1428
1429 (((
1430 AT+DISAT: Disable AT commands
1431 )))
1432
1433 (((
1434 AT+PWORD: Set password, max 9 digits
1435 )))
1436
1437 (((
1438 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1439 )))
1440
1441 (((
1442 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1443 )))
1444
1445 (((
1446 AT+CFG: Print all settings
1447 )))
1448
1449 == 4.2 Common AT Command Sequence ==
1450
1451 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1452
1453 (((
1454 If device has not joined network yet:
1455 )))
1456
1457 (((
1458 (% style="background-color:#dcdcdc" %)123456
1459 )))
1460
1461 (((
1462 (% style="background-color:#dcdcdc" %)AT+FDR
1463 )))
1464
1465 (((
1466 (% style="background-color:#dcdcdc" %)123456
1467 )))
1468
1469 (((
1470 (% style="background-color:#dcdcdc" %)AT+NJM=0
1471 )))
1472
1473 (((
1474 (% style="background-color:#dcdcdc" %)ATZ
1475 )))
1476
1477
1478 (((
1479 If device already joined network:
1480 )))
1481
1482 (((
1483 (% style="background-color:#dcdcdc" %)AT+NJM=0
1484 )))
1485
1486 (((
1487 (% style="background-color:#dcdcdc" %)ATZ
1488 )))
1489
1490 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1491
1492 (((
1493 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1494 )))
1495
1496 (((
1497 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1498 )))
1499
1500 (((
1501 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1502 )))
1503
1504 (((
1505 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1506 )))
1507
1508 (((
1509 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1510 )))
1511
1512 (((
1513 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1514 )))
1515
1516 (((
1517 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1518 )))
1519
1520 (((
1521 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1522 )))
1523
1524 (((
1525 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1526 )))
1527
1528 (((
1529 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1530 )))
1531
1532 (((
1533 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1534 )))
1535
1536 (((
1537 (% 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.
1538 )))
1539
1540 (((
1541 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1542 )))
1543
1544 (((
1545 (% style="color:red" %)**Note:**
1546 )))
1547
1548 (((
1549 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1550 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1551 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.
1552 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
1553 )))
1554
1555 (((
1556 [[image:1653359097980-169.png||height="188" width="729"]]
1557 )))
1558
1559 (((
1560
1561 )))
1562
1563 === 4.2.3 Change to Class A ===
1564
1565 If sensor JOINED
1566 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1567 ATZ
1568
1569 = 5. FAQ =
1570
1571 == 5.1 How to upgrade the image? ==
1572
1573 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1574
1575 * Support new features
1576 * For bug fix
1577 * Change LoRaWAN bands.
1578 Below shows the hardware connection for how to upload an image to the LT:
1579 * [[image:1653359603330-121.png]]
1580
1581 **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]].
1582 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1583 **Step3: **Open flashloader; choose the correct COM port to update.
1584 **For LT-22222-L**:
1585 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.
1586
1587 [[image:image-20220524103407-12.png]]
1588
1589 [[image:image-20220524103429-13.png]]
1590
1591 [[image:image-20220524104033-15.png]]
1592
1593 (% 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:
1594
1595 [[image:1653360054704-518.png||height="186" width="745"]]
1596
1597 (((
1598 (((
1599 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1600 )))
1601 )))
1602
1603 (((
1604 User can follow the introduction for [[how to upgrade image>>path:http://8.211.40.43:8080/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H5.1Howtoupgradetheimage3F]]. When download the images, choose the required image file for download.
1605 )))
1606
1607 (((
1608 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1609 )))
1610
1611 (((
1612 (((
1613 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1614 )))
1615 )))
1616
1617 (((
1618 (((
1619 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1620 )))
1621 )))
1622
1623 (((
1624 (% 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.
1625 )))
1626
1627 (((
1628 [[image:1653360231087-571.png||height="401" width="727"]]
1629 )))
1630
1631 (% 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.
1632
1633 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1634
1635 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1636 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1637 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1638 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1639 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1640 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1641 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1642 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1643 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1644 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1645
1646 As shown in below:
1647
1648 [[image:1653360498588-932.png||height="485" width="726"]]
1649
1650 == 5.4 Can I see counting event in Serial? ==
1651
1652 (((
1653 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.
1654 )))
1655
1656 (((
1657 = 6. Trouble Shooting =
1658 )))
1659
1660 (((
1661 (((
1662 == 6.1 Downlink doesn’t work, how to solve it? ==
1663 )))
1664 )))
1665
1666 (((
1667 Please see this link for how to debug:
1668
1669 [[http:~~/~~/8.211.40.43:8080/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/>>http://8.211.40.43:8080/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/]]
1670 )))
1671
1672 (((
1673 [[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#How_it_work>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#How_it_work]]
1674 )))
1675
1676 (((
1677 == 6.2 Have trouble to upload image. ==
1678 )))
1679
1680 (((
1681 See this link for trouble shooting:
1682 )))
1683
1684 (((
1685 [[http:~~/~~/wiki.dragino.com/index.php?title=Firmware_Upgrade_Trouble_Shooting#UART_upgrade_trouble_shooting>>url:http://wiki.dragino.com/index.php?title=Firmware_Upgrade_Trouble_Shooting#UART_upgrade_trouble_shooting]]
1686 )))
1687
1688 (((
1689 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1690 )))
1691
1692 (((
1693 It might be about the channels mapping. Please see this link for detail:
1694 )))
1695
1696 (((
1697 [[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band]]
1698 )))
1699
1700 (((
1701 = 7. Order Info =
1702 )))
1703
1704 (((
1705 (((
1706 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1707 )))
1708 )))
1709
1710 (((
1711 (((
1712 (% style="color:#4f81bd" %)**XXX:**
1713 )))
1714 )))
1715
1716 * (((
1717 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1718 )))
1719 * (((
1720 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1721 )))
1722 * (((
1723 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1724 )))
1725 * (((
1726 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1727 )))
1728 * (((
1729 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1730 )))
1731 * (((
1732 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1733 )))
1734 * (((
1735 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1736 )))
1737 * (((
1738 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1739 )))
1740
1741 (((
1742 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1743
1744 = 8. Packing Info =
1745 )))
1746
1747 (((
1748 (((
1749 **Package Includes**:
1750 )))
1751 )))
1752
1753 (((
1754 (((
1755 * LT-22222-L I/O Controller x 1
1756 * Stick Antenna for LoRa RF part x 1
1757 * Bracket for controller x1
1758 * Program cable x 1
1759 )))
1760 )))
1761
1762 (((
1763 (((
1764 **Dimension and weight**:
1765 )))
1766 )))
1767
1768 (((
1769 (((
1770 * Device Size: 13.5 x 7 x 3 cm
1771 * Device Weight: 105g
1772 * Package Size / pcs : 14.5 x 8 x 5 cm
1773 * Weight / pcs : 170g
1774 )))
1775 )))
1776
1777 (((
1778 = 9. Support =
1779 )))
1780
1781 * (((
1782 (((
1783 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.
1784 )))
1785 )))
1786 * (((
1787 (((
1788 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
1789 )))
1790 )))
1791
1792 (((
1793 (((
1794 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
1795 )))
1796
1797 (((
1798 = 10. Reference​​​​​ =
1799
1800 * Product Page:
1801
1802 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]]
1803
1804 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
1805 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1806 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
1807 )))
1808 )))