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Version 66.21 by Xiaoling on 2022/05/24 13:55
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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 (((
203 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. 
204 )))
205
206 (((
207 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.
208 )))
209
210 (((
211 3.2 Example to join LoRaWAN network
212 )))
213
214 (((
215 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. 
216 )))
217
218 [[image:image-20220523172350-1.png||height="266" width="864"]]
219
220
221 (((
222 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:
223 )))
224
225 (((
226 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
227 )))
228
229 (((
230 Each LT is shipped with a sticker with the default device EUI as below:
231 )))
232
233 [[image:1653297924498-393.png]]
234
235 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
236
237 Add APP EUI in the application.
238
239 [[image:1653297955910-247.png||height="321" width="716"]]
240
241 Add APP KEY and DEV EUI
242
243 [[image:1653298023685-319.png]]
244
245 (((
246 **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.
247 )))
248
249 [[image:1653298044601-602.png||height="405" width="709"]]
250
251 == 3.3 Uplink Payload ==
252
253 There are five working modes + one interrupt mode on LT for different type application:
254
255 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
256 * **MOD2**: Double DI Counting + DO + RO
257 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
258 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
259 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
260 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
261
262 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
263
264 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
265
266 [[image:image-20220523174024-3.png]]
267
268 (((
269 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
270 )))
271
272 [[image:image-20220523174254-4.png]]
273
274 * RO is for relay. ROx=1 : close，ROx=0 always open.
275 * DI is for digital input. DIx=1: high or float, DIx=0: low.
276 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
277
278 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
279
280 For example if payload is: [[image:image-20220523175847-2.png]]
281
282 **The value for the interface is:  **
283
284 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
285
286 AVI2 channel voltage is 0x04AC/1000=1.196V
287
288 ACI1 channel current is 0x1310/1000=4.880mA
289
290 ACI2 channel current is 0x1300/1000=4.864mA
291
292 The last byte 0xAA= 10101010(B) means
293
294 * [1] RO1 relay channel is close and the RO1 LED is ON.
295 * [0] RO2 relay channel is open and RO2 LED is OFF;
296
297 **LT22222-L:**
298
299 * [1] DI2 channel is high input and DI2 LED is ON;
300 * [0] DI1 channel is low input;
301
302 * [0] DO3 channel output state
303 ** DO3 is float in case no load between DO3 and V+.;
304 ** DO3 is high in case there is load between DO3 and V+.
305 ** DO3 LED is off in both case
306 * [1] DO2 channel output is low and DO2 LED is ON.
307 * [0] DO1 channel output state
308 ** DO1 is float in case no load between DO1 and V+.;
309 ** DO1 is high in case there is load between DO1 and V+.
310 ** DO1 LED is off in both case
311
312 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
313
314 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
315
316 Total : 11 bytes payload
317
318 [[image:image-20220523180452-3.png]]
319
320 (((
321 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
322 )))
323
324 [[image:image-20220523180506-4.png]]
325
326 * RO is for relay. ROx=1 : close，ROx=0 always open.
327 * FIRST: Indicate this is the first packet after join network.
328 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
329
330 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
331
332 **To use counting mode, please run:**
333
334 (% class="box infomessage" %)
335 (((
336 **AT+MOD=2**
337 )))
338
339 (% class="box infomessage" %)
340 (((
341 **ATZ**
342 )))
343
344 (% style="color:#4f81bd" %)**AT Commands for counting:**
345
346 **For LT22222-L:**
347
348 (% class="box infomessage" %)
349 (((
350 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
351 )))
352
353 (% class="box infomessage" %)
354 (((
355 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
356 )))
357
358 (% class="box infomessage" %)
359 (((
360 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
361 )))
362
363 (% class="box infomessage" %)
364 (((
365 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
366 )))
367
368 (% class="box infomessage" %)
369 (((
370 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
371 )))
372
373 (% class="box infomessage" %)
374 (((
375 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
376 )))
377
378 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
379
380 **LT22222-L**: This mode the DI1 is used as a counting pin.
381
382 [[image:image-20220523181246-5.png]]
383
384 (((
385 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
386 )))
387
388 [[image:image-20220523181301-6.png]]
389
390 * RO is for relay. ROx=1 : close，ROx=0 always open.
391 * FIRST: Indicate this is the first packet after join network.
392 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
393
394 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
395
396 **To use counting mode, please run:**
397
398 (% class="box infomessage" %)
399 (((
400 **AT+MOD=3**
401 )))
402
403 (% class="box infomessage" %)
404 (((
405 **ATZ**
406 )))
407
408 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]].
409
410 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
411
412 **LT22222-L**: This mode the DI1 is used as a counting pin.
413
414 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.
415
416 [[image:image-20220523181903-8.png]]
417
418 (((
419 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
420 )))
421
422 [[image:image-20220523181727-7.png]]
423
424 * RO is for relay. ROx=1 : close，ROx=0 always open.
425 * FIRST: Indicate this is the first packet after join network.
426 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
427
428 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
429
430 **To use this mode, please run:**
431
432 (% class="box infomessage" %)
433 (((
434 **AT+MOD=4**
435 )))
436
437 (% class="box infomessage" %)
438 (((
439 **ATZ**
440 )))
441
442
443 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]].
444
445 **Plus below command for AVI1 Counting:**
446
447 (% class="box infomessage" %)
448 (((
449 **AT+SETCNT=3,60   (set AVI Count to 60)**
450 )))
451
452 (% class="box infomessage" %)
453 (((
454 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
455 )))
456
457 (% class="box infomessage" %)
458 (((
459 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
460 )))
461
462 (% class="box infomessage" %)
463 (((
464 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
465 )))
466
467 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
468
469 **LT22222-L**: This mode the DI1 is used as a counting pin.
470
471 [[image:image-20220523182334-9.png]]
472
473 (((
474 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
475 )))
476
477 * RO is for relay. ROx=1 : close，ROx=0 always open.
478 * FIRST: Indicate this is the first packet after join network.
479 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
480
481 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
482
483 **To use this mode, please run:**
484
485 (% class="box infomessage" %)
486 (((
487 **AT+MOD=5**
488 )))
489
490 (% class="box infomessage" %)
491 (((
492 **ATZ**
493 )))
494
495 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]].
496
497 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
498
499 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
500
501 For example, if user has configured below commands:
502
503 * **AT+MOD=1 ** **~-~->** The normal working mode
504 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
505
506 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
507
508 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
509 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.**
510
511 **AT Command to set Trigger Condition**:
512
513 (% style="color:#4f81bd" %)**Trigger base on voltage**:
514
515 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
516
517 **Example:**
518
519 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)
520
521 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
522
523 (% style="color:#4f81bd" %)**Trigger base on current**:
524
525 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
526
527 **Example:**
528
529 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
530
531 (% style="color:#4f81bd" %)**Trigger base on DI status**:
532
533 DI status trigger Flag.
534
535 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
536
537 **Example:**
538
539 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
540
541
542 **Downlink Command to set Trigger Condition**
543
544 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
545
546 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
547
548 AA: Code for this downlink Command:
549
550 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
551
552 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
553
554 yy2 yy2: AC1 or AV1 high limit.
555
556 yy3 yy3: AC2 or AV2 low limit.
557
558 Yy4 yy4: AC2 or AV2 high limit.
559
560 **Example1**: AA 00 13 88 00 00 00 00 00 00
561
562 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
563
564 **Example2**: AA 02 01 00
565
566 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
567
568 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
569
570 MOD6 Payload : total 11 bytes payload
571
572 [[image:image-20220524085923-1.png]]
573
574 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
575
576 [[image:image-20220524090106-2.png]]
577
578 * Each bits shows if the corresponding trigger has been configured.
579
580 **Example:**
581
582 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
583
584
585 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
586
587 [[image:image-20220524090249-3.png]]
588
589 * Each bits shows which status has been trigger on this uplink.
590
591 **Example:**
592
593 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
594
595
596 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
597
598 [[image:image-20220524090456-4.png]]
599
600 * Each bits shows which status has been trigger on this uplink.
601
602 **Example:**
603
604 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
605
606 00000101: Means both DI1 and DI2 trigger are enabled.
607
608
609 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
610
611 Downlink command to poll MOD6 status:
612
613 **AB 06**
614
615 When device got this command, it will send the MOD6 payload.
616
617 === 3.3.7 Payload Decoder ===
618
619 (((
620 **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/]]
621 )))
622
623 == 3.4 ​Configure LT via AT or Downlink ==
624
625 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
626
627 (((
628 There are two kinds of Commands:
629 )))
630
631 * (% 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
632
633 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
634
635 === 3.4.1 Common Commands ===
636
637 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/]]
638
639 === 3.4.2 Sensor related commands ===
640
641 ==== 3.4.2.1 Set Transmit Interval ====
642
643 Set device uplink interval.
644
645 * AT Command:
646
647 (% class="box infomessage" %)
648 (((
649 **AT+TDC=N **
650 )))
651
652 **Example: **AT+TDC=30000. Means set interval to 30 seconds
653
654 * Downlink Payload (prefix 0x01):
655
656 (% class="box infomessage" %)
657 (((
658 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
659 )))
660
661 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
662
663 Set work mode.
664
665 * AT Command:
666
667 (% class="box infomessage" %)
668 (((
669 **AT+MOD=N  **
670 )))
671
672 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
673
674 * Downlink Payload (prefix 0x0A):
675
676 (% class="box infomessage" %)
677 (((
678 **0x0A aa     ~/~/ Same as AT+MOD=aa**
679 )))
680
681 ==== 3.4.2.3 Poll an uplink ====
682
683 * AT Command:
684
685 There is no AT Command to poll uplink
686
687 * Downlink Payload (prefix 0x08):
688
689 (% class="box infomessage" %)
690 (((
691 **0x08 FF     ~/~/ Poll an uplink,**
692 )))
693
694 **Example**: 0x08FF, ask device to send an Uplink
695
696 ==== 3.4.2.4 Enable Trigger Mode ====
697
698 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]]
699
700 * AT Command:
701
702 (% class="box infomessage" %)
703 (((
704 **AT+ADDMOD6=1 or 0**
705 )))
706
707 1: Enable Trigger Mode
708
709 0: Disable Trigger Mode
710
711 * Downlink Payload (prefix 0x0A 06):
712
713 (% class="box infomessage" %)
714 (((
715 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
716 )))
717
718 ==== 3.4.2.5 Poll trigger settings ====
719
720 Poll trigger settings,
721
722 * AT Command:
723
724 There is no AT Command for this feature.
725
726 * Downlink Payload (prefix 0x AB 06):
727
728 (% class="box infomessage" %)
729 (((
730 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
731 )))
732
733 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
734
735 Enable Disable DI1/DI2/DI2 as trigger,
736
737 * AT Command:
738
739 (% class="box infomessage" %)
740 (((
741 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
742 )))
743
744 **Example:**
745
746 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
747
748 * Downlink Payload (prefix 0xAA 02):
749
750 (% class="box infomessage" %)
751 (((
752 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
753 )))
754
755 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
756
757 Set DI1 or DI3(for LT-33222-L) trigger.
758
759 * AT Command:
760
761 (% class="box infomessage" %)
762 (((
763 **AT+TRIG1=a,b**
764 )))
765
766 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
767
768 b : delay timing.
769
770 **Example:**
771
772 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
773
774 * Downlink Payload (prefix 0x09 01 ):
775
776 (% class="box infomessage" %)
777 (((
778 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
779 )))
780
781 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
782
783 Set DI2 trigger.
784
785 * AT Command:
786
787 (% class="box infomessage" %)
788 (((
789 **AT+TRIG2=a,b**
790 )))
791
792 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
793
794 b : delay timing.
795
796 **Example:**
797
798 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
799
800 * Downlink Payload (prefix 0x09 02 ):
801
802 (% class="box infomessage" %)
803 (((
804 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
805 )))
806
807 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
808
809 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]]
810
811 * AT Command:
812
813 (% class="box infomessage" %)
814 (((
815 **AT+ACLIM. **
816 )))
817
818 * Downlink Payload (prefix 0xAA 01 ):
819
820 (% class="box infomessage" %)
821 (((
822 **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]]**
823 )))
824
825 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
826
827 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]]
828
829 * AT Command:
830
831 (% class="box infomessage" %)
832 (((
833 **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]]**
834 )))
835
836 * Downlink Payload (prefix 0xAA 00 ):
837
838 (% class="box infomessage" %)
839 (((
840 **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]] **
841 )))
842
843 ==== 3.4.2.11 Trigger – Set minimum interval ====
844
845 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
846
847 * AT Command:
848
849 (% class="box infomessage" %)
850 (((
851 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
852 )))
853
854 * Downlink Payload (prefix 0xAC ):
855
856 (% class="box infomessage" %)
857 (((
858 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
859 )))
860
861 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
862
863 * AT Command:
864
865 There is no AT Command to control Digital Output
866
867 * Downlink Payload (prefix 0x02):
868
869 (% class="box infomessage" %)
870 (((
871 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
872 )))
873
874 (((
875 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
876 )))
877
878 (((
879 01: Low,  00: High ,  11: No action
880 )))
881
882 [[image:image-20220524092754-5.png]]
883
884 (((
885 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
886 )))
887
888 (((
889 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
890 )))
891
892
893 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
894
895 * AT Command:
896
897 There is no AT Command to control Digital Output
898
899 * Downlink Payload (prefix 0xA9):
900
901 (% class="box infomessage" %)
902 (((
903 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
904 )))
905
906 This is to control the digital output time of DO pin. Include four bytes:
907
908 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
909
910 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
911
912 01: DO pins will change back to original state after timeout.
913
914 00: DO pins will change to an inverter state after timeout 
915
916 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
917
918 [[image:image-20220524093238-6.png]]
919
920 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
921
922 [[image:image-20220524093328-7.png]]
923
924 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
925
926 [[image:image-20220524093351-8.png]]
927
928 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
929
930 Latching time. Unit: ms
931
932 Device will upload a packet if downlink code executes successfully.
933
934 **Example payload:**
935
936 **~1. A9 01 01 01 01 07 D0**
937
938 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
939
940 **2. A9 01 00 01 11 07 D0**
941
942 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
943
944 **3. A9 00 00 00 00 07 D0**
945
946 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
947
948 **4. A9 00 11 01 00 07 D0**
949
950 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
951
952
953 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
954
955 * AT Command:
956
957 There is no AT Command to control Relay Output
958
959 * Downlink Payload (prefix 0x03):
960
961 (% class="box infomessage" %)
962 (((
963 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
964 )))
965
966 (((
967 If payload = 0x030100, it means set RO1 to close and RO2 to open.
968 )))
969
970 (((
971 01: Close ,  00: Open , 11: No action
972 )))
973
974 (((
975 [[image:image-20220524093724-9.png]]
976 )))
977
978 Device will upload a packet if downlink code executes successfully.
979
980
981 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
982
983 * AT Command:
984
985 There is no AT Command to control Relay Output
986
987 * Downlink Payload (prefix 0x05):
988
989 (% class="box infomessage" %)
990 (((
991 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
992 )))
993
994 This is to control the relay output time of relay. Include four bytes:
995
996 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
997
998 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
999
1000 01: Relays will change back to original state after timeout.
1001
1002 00: Relays will change to an inverter state after timeout
1003
1004 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1005
1006 [[image:image-20220524093831-10.png]]
1007
1008 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1009
1010 Device will upload a packet if downlink code executes successfully.
1011
1012 **Example payload:**
1013
1014 **~1. 05 01 11 07 D0**
1015
1016 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1017
1018 **2. 05 01 10 07 D0**
1019
1020 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1021
1022 **3. 05 00 01 07 D0**
1023
1024 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1025
1026 **4. 05 00 00 07 D0**
1027
1028 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1029
1030
1031 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1032
1033 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]]
1034
1035 * AT Command:
1036
1037 (% class="box infomessage" %)
1038 (((
1039 **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]]**
1040 )))
1041
1042 * Downlink Payload (prefix 0xA5):
1043
1044 (% class="box infomessage" %)
1045 (((
1046 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1047 )))
1048
1049 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1050
1051 * AT Command:
1052
1053 (% class="box infomessage" %)
1054 (((
1055 **AT+SETCNT=aa,(bb cc dd ee) **
1056 )))
1057
1058 aa: 1: Set count1,
1059
1060 2: Set count2,
1061
1062 3: Set AV1 count
1063
1064 Bb cc dd ee: number to be set
1065
1066 * Downlink Payload (prefix 0xA8):
1067
1068 (% class="box infomessage" %)
1069 (((
1070 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1071 )))
1072
1073 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1074
1075 Clear counting for counting mode
1076
1077 * AT Command:
1078
1079 (% class="box infomessage" %)
1080 (((
1081 **AT+CLRCOUNT ~/~/ clear all counting**
1082 )))
1083
1084 * Downlink Payload (prefix 0xA6):
1085
1086 (% class="box infomessage" %)
1087 (((
1088 **0x A6 01     ~/~/ clear all counting,**
1089 )))
1090
1091 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1092
1093 * AT Command:
1094
1095 (% class="box infomessage" %)
1096 (((
1097 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1098 )))
1099
1100 * Downlink Payload (prefix 0xA7):
1101
1102 (% class="box infomessage" %)
1103 (((
1104 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1105 )))
1106
1107 range: aa bb cc:0 to 16777215,  (unit:second)
1108
1109 == 3.5 Integrate with Mydevice ==
1110
1111 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:
1112
1113 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1114
1115 **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:
1116
1117 [[image:1653356737703-362.png||height="232" width="732"]]
1118
1119 [[image:image-20220524094641-11.png||height="390" width="723"]]
1120
1121
1122 [[image:image-20220524094641-12.png||height="402" width="718"]]
1123
1124 **Step 3**: Create an account or log in Mydevices.
1125
1126 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1127
1128 Search under The things network
1129
1130 [[image:1653356838789-523.png||height="337" width="740"]]
1131
1132 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1133
1134 [[image:image-20220524094909-1.png||height="335" width="729"]]
1135
1136 [[image:image-20220524094909-2.png||height="337" width="729"]]
1137
1138 [[image:image-20220524094909-3.png||height="338" width="727"]]
1139
1140 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1141
1142 [[image:image-20220524094909-5.png||height="341" width="734"]]
1143
1144 == 3.6 Interface Detail ==
1145
1146 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1147
1148 Support NPN Type sensor
1149
1150 [[image:1653356991268-289.png]]
1151
1152 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1153
1154 (((
1155 The DI port of LT-22222-L can support NPN or PNP output sensor.
1156 )))
1157
1158 (((
1159 (((
1160 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
1161 )))
1162 )))
1163
1164 [[image:1653357170703-587.png]]
1165
1166 (((
1167 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1168 )))
1169
1170
1171 **Example1**: Connect to a Low active sensor.
1172
1173 This type of sensor will output a low signal GND when active.
1174
1175 * Connect sensor’s output to DI1-
1176 * Connect sensor’s VCC to DI1+.
1177
1178 So when sensor active, the current between NEC2501 pin1 and pin2 is： ​​
1179
1180 //IF// = DI1+ / 1K.
1181
1182 If DI1+ = 12v, the //IF// = 12mA , So the LT-22222-L will be able to detect this active signal.
1183
1184
1185 **Example2**: Connect to a High active sensor.
1186
1187 This type of sensor will output a high signal (example 24v) when active.
1188
1189 * Connect sensor’s output to DI1+
1190 * Connect sensor’s GND DI1-.
1191
1192 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1193
1194 [[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.**
1195
1196 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.
1197
1198
1199 **Example3**: Connect to a 220v high active sensor.
1200
1201 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1202
1203 * Connect sensor’s output to DI1+ with a serial 50K resistor
1204 * Connect sensor’s GND DI1-.
1205
1206 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1207
1208 [[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.**
1209
1210 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.
1211
1212 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1213
1214 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1215
1216 [[image:1653357531600-905.png]]
1217
1218 === 3.6.4 Analog Input Interface ===
1219
1220 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:
1221
1222 **AC2 = (IN2 voltage )/12**
1223
1224 [[image:1653357592296-182.png]]
1225
1226 Example to connect a 4~~20mA sensor
1227
1228 We take the wind speed sensor as an example for reference only.
1229
1230 Specifications of the wind speed sensor:
1231
1232 Red:12~~24v
1233
1234 Yellow:4~~20mA
1235
1236 Black:GND
1237
1238
1239 Connection diagram:
1240
1241 [[image:1653357640609-758.png]]
1242
1243 [[image:1653357648330-671.png||height="155" width="733"]]
1244
1245 === 3.6.5 Relay Output ===
1246
1247 (((
1248 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:
1249 )))
1250
1251 [[image:image-20220524100215-9.png]]
1252
1253 [[image:image-20220524100215-10.png||height="382" width="723"]]
1254
1255 == 3.7 LEDs Indicators ==
1256
1257 [[image:image-20220524100748-11.png]]
1258
1259 = 4. Use AT Command =
1260
1261 == 4.1 Access AT Command ==
1262
1263 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.
1264
1265 [[image:1653358238933-385.png]]
1266
1267 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:
1268
1269 [[image:1653358355238-883.png]]
1270
1271 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/]]
1272
1273 (((
1274 AT+<CMD>?        : Help on <CMD>
1275 )))
1276
1277 (((
1278 AT+<CMD>         : Run <CMD>
1279 )))
1280
1281 (((
1282 AT+<CMD>=<value> : Set the value
1283 )))
1284
1285 (((
1286 AT+<CMD>=?       : Get the value
1287 )))
1288
1289 (((
1290 ATZ: Trig a reset of the MCU
1291 )))
1292
1293 (((
1294 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1295 )))
1296
1297 (((
1298 AT+DEUI: Get or Set the Device EUI
1299 )))
1300
1301 (((
1302 AT+DADDR: Get or Set the Device Address
1303 )))
1304
1305 (((
1306 AT+APPKEY: Get or Set the Application Key
1307 )))
1308
1309 (((
1310 AT+NWKSKEY: Get or Set the Network Session Key
1311 )))
1312
1313 (((
1314 AT+APPSKEY: Get or Set the Application Session Key
1315 )))
1316
1317 (((
1318 AT+APPEUI: Get or Set the Application EUI
1319 )))
1320
1321 (((
1322 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1323 )))
1324
1325 (((
1326 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1327 )))
1328
1329 (((
1330 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1331 )))
1332
1333 (((
1334 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1335 )))
1336
1337 (((
1338 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1339 )))
1340
1341 (((
1342 AT+RX2FQ: Get or Set the Rx2 window frequency
1343 )))
1344
1345 (((
1346 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1347 )))
1348
1349 (((
1350 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1351 )))
1352
1353 (((
1354 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1355 )))
1356
1357 (((
1358 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1359 )))
1360
1361 (((
1362 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1363 )))
1364
1365 (((
1366 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1367 )))
1368
1369 (((
1370 AT+NWKID: Get or Set the Network ID
1371 )))
1372
1373 (((
1374 AT+FCU: Get or Set the Frame Counter Uplink
1375 )))
1376
1377 (((
1378 AT+FCD: Get or Set the Frame Counter Downlink
1379 )))
1380
1381 (((
1382 AT+CLASS: Get or Set the Device Class
1383 )))
1384
1385 (((
1386 AT+JOIN: Join network
1387 )))
1388
1389 (((
1390 AT+NJS: Get OTAA Join Status
1391 )))
1392
1393 (((
1394 AT+SENDB: Send hexadecimal data along with the application port
1395 )))
1396
1397 (((
1398 AT+SEND: Send text data along with the application port
1399 )))
1400
1401 (((
1402 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1403 )))
1404
1405 (((
1406 AT+RECV: Print last received data in raw format
1407 )))
1408
1409 (((
1410 AT+VER: Get current image version and Frequency Band
1411 )))
1412
1413 (((
1414 AT+CFM: Get or Set the confirmation mode (0-1)
1415 )))
1416
1417 (((
1418 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1419 )))
1420
1421 (((
1422 AT+SNR: Get the SNR of the last received packet
1423 )))
1424
1425 (((
1426 AT+RSSI: Get the RSSI of the last received packet
1427 )))
1428
1429 (((
1430 AT+TDC: Get or set the application data transmission interval in ms
1431 )))
1432
1433 (((
1434 AT+PORT: Get or set the application port
1435 )))
1436
1437 (((
1438 AT+DISAT: Disable AT commands
1439 )))
1440
1441 (((
1442 AT+PWORD: Set password, max 9 digits
1443 )))
1444
1445 (((
1446 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1447 )))
1448
1449 (((
1450 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1451 )))
1452
1453 (((
1454 AT+CFG: Print all settings
1455 )))
1456
1457 == 4.2 Common AT Command Sequence ==
1458
1459 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1460
1461 (((
1462 If device has not joined network yet:
1463 )))
1464
1465 (((
1466 (% style="background-color:#dcdcdc" %)123456
1467 )))
1468
1469 (((
1470 (% style="background-color:#dcdcdc" %)AT+FDR
1471 )))
1472
1473 (((
1474 (% style="background-color:#dcdcdc" %)123456
1475 )))
1476
1477 (((
1478 (% style="background-color:#dcdcdc" %)AT+NJM=0
1479 )))
1480
1481 (((
1482 (% style="background-color:#dcdcdc" %)ATZ
1483 )))
1484
1485
1486 (((
1487 If device already joined network:
1488 )))
1489
1490 (((
1491 (% style="background-color:#dcdcdc" %)AT+NJM=0
1492 )))
1493
1494 (((
1495 (% style="background-color:#dcdcdc" %)ATZ
1496 )))
1497
1498 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1499
1500 (((
1501 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1502 )))
1503
1504 (((
1505 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1506 )))
1507
1508 (((
1509 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1510 )))
1511
1512 (((
1513 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1514 )))
1515
1516 (((
1517 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1518 )))
1519
1520 (((
1521 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1522 )))
1523
1524 (((
1525 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1526 )))
1527
1528 (((
1529 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1530 )))
1531
1532 (((
1533 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1534 )))
1535
1536 (((
1537 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1538 )))
1539
1540 (((
1541 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1542 )))
1543
1544 (((
1545 (% 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.
1546 )))
1547
1548 (((
1549 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1550 )))
1551
1552 (((
1553 (% style="color:red" %)**Note:**
1554 )))
1555
1556 (((
1557 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1558 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1559 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.
1560 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
1561 )))
1562
1563 (((
1564 [[image:1653359097980-169.png||height="188" width="729"]]
1565 )))
1566
1567 (((
1568
1569 )))
1570
1571 === 4.2.3 Change to Class A ===
1572
1573 If sensor JOINED
1574 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1575 ATZ
1576
1577 = 5. FAQ =
1578
1579 == 5.1 How to upgrade the image? ==
1580
1581 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1582
1583 * Support new features
1584 * For bug fix
1585 * Change LoRaWAN bands.
1586 Below shows the hardware connection for how to upload an image to the LT:
1587 * [[image:1653359603330-121.png]]
1588
1589 **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]].
1590 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1591 **Step3: **Open flashloader; choose the correct COM port to update.
1592 **For LT-22222-L**:
1593 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.
1594
1595 [[image:image-20220524103407-12.png]]
1596
1597 [[image:image-20220524103429-13.png]]
1598
1599 [[image:image-20220524104033-15.png]]
1600
1601 (% 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:
1602
1603 [[image:1653360054704-518.png||height="186" width="745"]]
1604
1605 (((
1606 (((
1607 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1608 )))
1609 )))
1610
1611 (((
1612 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.
1613 )))
1614
1615 (((
1616 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1617 )))
1618
1619 (((
1620 (((
1621 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1622 )))
1623 )))
1624
1625 (((
1626 (((
1627 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1628 )))
1629 )))
1630
1631 (((
1632 (% 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.
1633 )))
1634
1635 (((
1636 [[image:1653360231087-571.png||height="401" width="727"]]
1637 )))
1638
1639 (% 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.
1640
1641 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1642
1643 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1644 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1645 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1646 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1647 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1648 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1649 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1650 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1651 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1652 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1653
1654 As shown in below:
1655
1656 [[image:1653360498588-932.png||height="485" width="726"]]
1657
1658 == 5.4 Can I see counting event in Serial? ==
1659
1660 (((
1661 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.
1662 )))
1663
1664 (((
1665 = 6. Trouble Shooting =
1666 )))
1667
1668 (((
1669 (((
1670 == 6.1 Downlink doesn’t work, how to solve it? ==
1671 )))
1672 )))
1673
1674 (((
1675 Please see this link for how to debug:
1676
1677 [[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/]]
1678 )))
1679
1680 (((
1681 [[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]]
1682 )))
1683
1684 (((
1685 == 6.2 Have trouble to upload image. ==
1686 )))
1687
1688 (((
1689 See this link for trouble shooting:
1690 )))
1691
1692 (((
1693 [[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]]
1694 )))
1695
1696 (((
1697 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1698 )))
1699
1700 (((
1701 It might be about the channels mapping. Please see this link for detail:
1702 )))
1703
1704 (((
1705 [[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]]
1706 )))
1707
1708 (((
1709 = 7. Order Info =
1710 )))
1711
1712 (((
1713 (((
1714 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1715 )))
1716 )))
1717
1718 (((
1719 (((
1720 (% style="color:#4f81bd" %)**XXX:**
1721 )))
1722 )))
1723
1724 * (((
1725 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1726 )))
1727 * (((
1728 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1729 )))
1730 * (((
1731 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1732 )))
1733 * (((
1734 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1735 )))
1736 * (((
1737 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1738 )))
1739 * (((
1740 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1741 )))
1742 * (((
1743 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1744 )))
1745 * (((
1746 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1747 )))
1748
1749 (((
1750 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1751
1752 = 8. Packing Info =
1753 )))
1754
1755 (((
1756 (((
1757 **Package Includes**:
1758 )))
1759 )))
1760
1761 (((
1762 (((
1763 * LT-22222-L I/O Controller x 1
1764 * Stick Antenna for LoRa RF part x 1
1765 * Bracket for controller x1
1766 * Program cable x 1
1767 )))
1768 )))
1769
1770 (((
1771 (((
1772 **Dimension and weight**:
1773 )))
1774 )))
1775
1776 (((
1777 (((
1778 * Device Size: 13.5 x 7 x 3 cm
1779 * Device Weight: 105g
1780 * Package Size / pcs : 14.5 x 8 x 5 cm
1781 * Weight / pcs : 170g
1782 )))
1783 )))
1784
1785 (((
1786 = 9. Support =
1787 )))
1788
1789 * (((
1790 (((
1791 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.
1792 )))
1793 )))
1794 * (((
1795 (((
1796 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
1797 )))
1798 )))
1799
1800 (((
1801 (((
1802 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
1803 )))
1804
1805 (((
1806 = 10. Reference​​​​​ =
1807
1808 * Product Page:
1809
1810 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]]
1811
1812 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
1813 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1814 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
1815 )))
1816 )))