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Version 66.22 by Xiaoling on 2022/05/24 13:56
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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 (((
317 Total : 11 bytes payload
318 )))
319
320 [[image:image-20220523180452-3.png]]
321
322 (((
323 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
324 )))
325
326 [[image:image-20220523180506-4.png]]
327
328 * RO is for relay. ROx=1 : close，ROx=0 always open.
329 * FIRST: Indicate this is the first packet after join network.
330 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
331
332 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
333
334 **To use counting mode, please run:**
335
336 (% class="box infomessage" %)
337 (((
338 **AT+MOD=2**
339 )))
340
341 (% class="box infomessage" %)
342 (((
343 **ATZ**
344 )))
345
346 (% style="color:#4f81bd" %)**AT Commands for counting:**
347
348 **For LT22222-L:**
349
350 (% class="box infomessage" %)
351 (((
352 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
353 )))
354
355 (% class="box infomessage" %)
356 (((
357 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
358 )))
359
360 (% class="box infomessage" %)
361 (((
362 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
363 )))
364
365 (% class="box infomessage" %)
366 (((
367 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
368 )))
369
370 (% class="box infomessage" %)
371 (((
372 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
373 )))
374
375 (% class="box infomessage" %)
376 (((
377 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
378 )))
379
380 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
381
382 **LT22222-L**: This mode the DI1 is used as a counting pin.
383
384 [[image:image-20220523181246-5.png]]
385
386 (((
387 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
388 )))
389
390 [[image:image-20220523181301-6.png]]
391
392 * RO is for relay. ROx=1 : close，ROx=0 always open.
393 * FIRST: Indicate this is the first packet after join network.
394 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
395
396 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
397
398 **To use counting mode, please run:**
399
400 (% class="box infomessage" %)
401 (((
402 **AT+MOD=3**
403 )))
404
405 (% class="box infomessage" %)
406 (((
407 **ATZ**
408 )))
409
410 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]].
411
412 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
413
414 **LT22222-L**: This mode the DI1 is used as a counting pin.
415
416 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.
417
418 [[image:image-20220523181903-8.png]]
419
420 (((
421 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
422 )))
423
424 [[image:image-20220523181727-7.png]]
425
426 * RO is for relay. ROx=1 : close，ROx=0 always open.
427 * FIRST: Indicate this is the first packet after join network.
428 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
429
430 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
431
432 **To use this mode, please run:**
433
434 (% class="box infomessage" %)
435 (((
436 **AT+MOD=4**
437 )))
438
439 (% class="box infomessage" %)
440 (((
441 **ATZ**
442 )))
443
444
445 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]].
446
447 **Plus below command for AVI1 Counting:**
448
449 (% class="box infomessage" %)
450 (((
451 **AT+SETCNT=3,60   (set AVI Count to 60)**
452 )))
453
454 (% class="box infomessage" %)
455 (((
456 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
457 )))
458
459 (% class="box infomessage" %)
460 (((
461 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
462 )))
463
464 (% class="box infomessage" %)
465 (((
466 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
467 )))
468
469 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
470
471 **LT22222-L**: This mode the DI1 is used as a counting pin.
472
473 [[image:image-20220523182334-9.png]]
474
475 (((
476 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
477 )))
478
479 * RO is for relay. ROx=1 : close，ROx=0 always open.
480 * FIRST: Indicate this is the first packet after join network.
481 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
482
483 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
484
485 **To use this mode, please run:**
486
487 (% class="box infomessage" %)
488 (((
489 **AT+MOD=5**
490 )))
491
492 (% class="box infomessage" %)
493 (((
494 **ATZ**
495 )))
496
497 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]].
498
499 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
500
501 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
502
503 For example, if user has configured below commands:
504
505 * **AT+MOD=1 ** **~-~->** The normal working mode
506 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
507
508 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
509
510 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
511 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.**
512
513 **AT Command to set Trigger Condition**:
514
515 (% style="color:#4f81bd" %)**Trigger base on voltage**:
516
517 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
518
519 **Example:**
520
521 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)
522
523 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
524
525 (% style="color:#4f81bd" %)**Trigger base on current**:
526
527 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
528
529 **Example:**
530
531 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
532
533 (% style="color:#4f81bd" %)**Trigger base on DI status**:
534
535 DI status trigger Flag.
536
537 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
538
539 **Example:**
540
541 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
542
543
544 **Downlink Command to set Trigger Condition**
545
546 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
547
548 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
549
550 AA: Code for this downlink Command:
551
552 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
553
554 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
555
556 yy2 yy2: AC1 or AV1 high limit.
557
558 yy3 yy3: AC2 or AV2 low limit.
559
560 Yy4 yy4: AC2 or AV2 high limit.
561
562 **Example1**: AA 00 13 88 00 00 00 00 00 00
563
564 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
565
566 **Example2**: AA 02 01 00
567
568 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
569
570 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
571
572 MOD6 Payload : total 11 bytes payload
573
574 [[image:image-20220524085923-1.png]]
575
576 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
577
578 [[image:image-20220524090106-2.png]]
579
580 * Each bits shows if the corresponding trigger has been configured.
581
582 **Example:**
583
584 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
585
586
587 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
588
589 [[image:image-20220524090249-3.png]]
590
591 * Each bits shows which status has been trigger on this uplink.
592
593 **Example:**
594
595 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
596
597
598 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
599
600 [[image:image-20220524090456-4.png]]
601
602 * Each bits shows which status has been trigger on this uplink.
603
604 **Example:**
605
606 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
607
608 00000101: Means both DI1 and DI2 trigger are enabled.
609
610
611 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
612
613 Downlink command to poll MOD6 status:
614
615 **AB 06**
616
617 When device got this command, it will send the MOD6 payload.
618
619 === 3.3.7 Payload Decoder ===
620
621 (((
622 **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/]]
623 )))
624
625 == 3.4 ​Configure LT via AT or Downlink ==
626
627 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
628
629 (((
630 There are two kinds of Commands:
631 )))
632
633 * (% 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
634
635 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
636
637 === 3.4.1 Common Commands ===
638
639 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/]]
640
641 === 3.4.2 Sensor related commands ===
642
643 ==== 3.4.2.1 Set Transmit Interval ====
644
645 Set device uplink interval.
646
647 * AT Command:
648
649 (% class="box infomessage" %)
650 (((
651 **AT+TDC=N **
652 )))
653
654 **Example: **AT+TDC=30000. Means set interval to 30 seconds
655
656 * Downlink Payload (prefix 0x01):
657
658 (% class="box infomessage" %)
659 (((
660 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
661 )))
662
663 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
664
665 Set work mode.
666
667 * AT Command:
668
669 (% class="box infomessage" %)
670 (((
671 **AT+MOD=N  **
672 )))
673
674 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
675
676 * Downlink Payload (prefix 0x0A):
677
678 (% class="box infomessage" %)
679 (((
680 **0x0A aa     ~/~/ Same as AT+MOD=aa**
681 )))
682
683 ==== 3.4.2.3 Poll an uplink ====
684
685 * AT Command:
686
687 There is no AT Command to poll uplink
688
689 * Downlink Payload (prefix 0x08):
690
691 (% class="box infomessage" %)
692 (((
693 **0x08 FF     ~/~/ Poll an uplink,**
694 )))
695
696 **Example**: 0x08FF, ask device to send an Uplink
697
698 ==== 3.4.2.4 Enable Trigger Mode ====
699
700 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]]
701
702 * AT Command:
703
704 (% class="box infomessage" %)
705 (((
706 **AT+ADDMOD6=1 or 0**
707 )))
708
709 1: Enable Trigger Mode
710
711 0: Disable Trigger Mode
712
713 * Downlink Payload (prefix 0x0A 06):
714
715 (% class="box infomessage" %)
716 (((
717 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
718 )))
719
720 ==== 3.4.2.5 Poll trigger settings ====
721
722 Poll trigger settings,
723
724 * AT Command:
725
726 There is no AT Command for this feature.
727
728 * Downlink Payload (prefix 0x AB 06):
729
730 (% class="box infomessage" %)
731 (((
732 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
733 )))
734
735 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
736
737 Enable Disable DI1/DI2/DI2 as trigger,
738
739 * AT Command:
740
741 (% class="box infomessage" %)
742 (((
743 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
744 )))
745
746 **Example:**
747
748 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
749
750 * Downlink Payload (prefix 0xAA 02):
751
752 (% class="box infomessage" %)
753 (((
754 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
755 )))
756
757 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
758
759 Set DI1 or DI3(for LT-33222-L) trigger.
760
761 * AT Command:
762
763 (% class="box infomessage" %)
764 (((
765 **AT+TRIG1=a,b**
766 )))
767
768 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
769
770 b : delay timing.
771
772 **Example:**
773
774 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
775
776 * Downlink Payload (prefix 0x09 01 ):
777
778 (% class="box infomessage" %)
779 (((
780 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
781 )))
782
783 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
784
785 Set DI2 trigger.
786
787 * AT Command:
788
789 (% class="box infomessage" %)
790 (((
791 **AT+TRIG2=a,b**
792 )))
793
794 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
795
796 b : delay timing.
797
798 **Example:**
799
800 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
801
802 * Downlink Payload (prefix 0x09 02 ):
803
804 (% class="box infomessage" %)
805 (((
806 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
807 )))
808
809 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
810
811 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]]
812
813 * AT Command:
814
815 (% class="box infomessage" %)
816 (((
817 **AT+ACLIM. **
818 )))
819
820 * Downlink Payload (prefix 0xAA 01 ):
821
822 (% class="box infomessage" %)
823 (((
824 **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]]**
825 )))
826
827 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
828
829 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]]
830
831 * AT Command:
832
833 (% class="box infomessage" %)
834 (((
835 **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]]**
836 )))
837
838 * Downlink Payload (prefix 0xAA 00 ):
839
840 (% class="box infomessage" %)
841 (((
842 **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]] **
843 )))
844
845 ==== 3.4.2.11 Trigger – Set minimum interval ====
846
847 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
848
849 * AT Command:
850
851 (% class="box infomessage" %)
852 (((
853 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
854 )))
855
856 * Downlink Payload (prefix 0xAC ):
857
858 (% class="box infomessage" %)
859 (((
860 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
861 )))
862
863 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
864
865 * AT Command:
866
867 There is no AT Command to control Digital Output
868
869 * Downlink Payload (prefix 0x02):
870
871 (% class="box infomessage" %)
872 (((
873 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
874 )))
875
876 (((
877 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
878 )))
879
880 (((
881 01: Low,  00: High ,  11: No action
882 )))
883
884 [[image:image-20220524092754-5.png]]
885
886 (((
887 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
888 )))
889
890 (((
891 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
892 )))
893
894
895 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
896
897 * AT Command:
898
899 There is no AT Command to control Digital Output
900
901 * Downlink Payload (prefix 0xA9):
902
903 (% class="box infomessage" %)
904 (((
905 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
906 )))
907
908 This is to control the digital output time of DO pin. Include four bytes:
909
910 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
911
912 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
913
914 01: DO pins will change back to original state after timeout.
915
916 00: DO pins will change to an inverter state after timeout 
917
918 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
919
920 [[image:image-20220524093238-6.png]]
921
922 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
923
924 [[image:image-20220524093328-7.png]]
925
926 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
927
928 [[image:image-20220524093351-8.png]]
929
930 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
931
932 Latching time. Unit: ms
933
934 Device will upload a packet if downlink code executes successfully.
935
936 **Example payload:**
937
938 **~1. A9 01 01 01 01 07 D0**
939
940 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
941
942 **2. A9 01 00 01 11 07 D0**
943
944 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
945
946 **3. A9 00 00 00 00 07 D0**
947
948 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
949
950 **4. A9 00 11 01 00 07 D0**
951
952 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
953
954
955 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
956
957 * AT Command:
958
959 There is no AT Command to control Relay Output
960
961 * Downlink Payload (prefix 0x03):
962
963 (% class="box infomessage" %)
964 (((
965 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
966 )))
967
968 (((
969 If payload = 0x030100, it means set RO1 to close and RO2 to open.
970 )))
971
972 (((
973 01: Close ,  00: Open , 11: No action
974 )))
975
976 (((
977 [[image:image-20220524093724-9.png]]
978 )))
979
980 Device will upload a packet if downlink code executes successfully.
981
982
983 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
984
985 * AT Command:
986
987 There is no AT Command to control Relay Output
988
989 * Downlink Payload (prefix 0x05):
990
991 (% class="box infomessage" %)
992 (((
993 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
994 )))
995
996 This is to control the relay output time of relay. Include four bytes:
997
998 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
999
1000 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1001
1002 01: Relays will change back to original state after timeout.
1003
1004 00: Relays will change to an inverter state after timeout
1005
1006 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1007
1008 [[image:image-20220524093831-10.png]]
1009
1010 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1011
1012 Device will upload a packet if downlink code executes successfully.
1013
1014 **Example payload:**
1015
1016 **~1. 05 01 11 07 D0**
1017
1018 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1019
1020 **2. 05 01 10 07 D0**
1021
1022 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1023
1024 **3. 05 00 01 07 D0**
1025
1026 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1027
1028 **4. 05 00 00 07 D0**
1029
1030 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1031
1032
1033 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1034
1035 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]]
1036
1037 * AT Command:
1038
1039 (% class="box infomessage" %)
1040 (((
1041 **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]]**
1042 )))
1043
1044 * Downlink Payload (prefix 0xA5):
1045
1046 (% class="box infomessage" %)
1047 (((
1048 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1049 )))
1050
1051 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1052
1053 * AT Command:
1054
1055 (% class="box infomessage" %)
1056 (((
1057 **AT+SETCNT=aa,(bb cc dd ee) **
1058 )))
1059
1060 aa: 1: Set count1,
1061
1062 2: Set count2,
1063
1064 3: Set AV1 count
1065
1066 Bb cc dd ee: number to be set
1067
1068 * Downlink Payload (prefix 0xA8):
1069
1070 (% class="box infomessage" %)
1071 (((
1072 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1073 )))
1074
1075 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1076
1077 Clear counting for counting mode
1078
1079 * AT Command:
1080
1081 (% class="box infomessage" %)
1082 (((
1083 **AT+CLRCOUNT ~/~/ clear all counting**
1084 )))
1085
1086 * Downlink Payload (prefix 0xA6):
1087
1088 (% class="box infomessage" %)
1089 (((
1090 **0x A6 01     ~/~/ clear all counting,**
1091 )))
1092
1093 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1094
1095 * AT Command:
1096
1097 (% class="box infomessage" %)
1098 (((
1099 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1100 )))
1101
1102 * Downlink Payload (prefix 0xA7):
1103
1104 (% class="box infomessage" %)
1105 (((
1106 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1107 )))
1108
1109 range: aa bb cc:0 to 16777215,  (unit:second)
1110
1111 == 3.5 Integrate with Mydevice ==
1112
1113 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:
1114
1115 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1116
1117 **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:
1118
1119 [[image:1653356737703-362.png||height="232" width="732"]]
1120
1121 [[image:image-20220524094641-11.png||height="390" width="723"]]
1122
1123
1124 [[image:image-20220524094641-12.png||height="402" width="718"]]
1125
1126 **Step 3**: Create an account or log in Mydevices.
1127
1128 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1129
1130 Search under The things network
1131
1132 [[image:1653356838789-523.png||height="337" width="740"]]
1133
1134 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1135
1136 [[image:image-20220524094909-1.png||height="335" width="729"]]
1137
1138 [[image:image-20220524094909-2.png||height="337" width="729"]]
1139
1140 [[image:image-20220524094909-3.png||height="338" width="727"]]
1141
1142 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1143
1144 [[image:image-20220524094909-5.png||height="341" width="734"]]
1145
1146 == 3.6 Interface Detail ==
1147
1148 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1149
1150 Support NPN Type sensor
1151
1152 [[image:1653356991268-289.png]]
1153
1154 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1155
1156 (((
1157 The DI port of LT-22222-L can support NPN or PNP output sensor.
1158 )))
1159
1160 (((
1161 (((
1162 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
1163 )))
1164 )))
1165
1166 [[image:1653357170703-587.png]]
1167
1168 (((
1169 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1170 )))
1171
1172
1173 **Example1**: Connect to a Low active sensor.
1174
1175 This type of sensor will output a low signal GND when active.
1176
1177 * Connect sensor’s output to DI1-
1178 * Connect sensor’s VCC to DI1+.
1179
1180 So when sensor active, the current between NEC2501 pin1 and pin2 is： ​​
1181
1182 //IF// = DI1+ / 1K.
1183
1184 If DI1+ = 12v, the //IF// = 12mA , So the LT-22222-L will be able to detect this active signal.
1185
1186
1187 **Example2**: Connect to a High active sensor.
1188
1189 This type of sensor will output a high signal (example 24v) when active.
1190
1191 * Connect sensor’s output to DI1+
1192 * Connect sensor’s GND DI1-.
1193
1194 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1195
1196 [[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.**
1197
1198 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.
1199
1200
1201 **Example3**: Connect to a 220v high active sensor.
1202
1203 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1204
1205 * Connect sensor’s output to DI1+ with a serial 50K resistor
1206 * Connect sensor’s GND DI1-.
1207
1208 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1209
1210 [[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.**
1211
1212 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.
1213
1214 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1215
1216 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1217
1218 [[image:1653357531600-905.png]]
1219
1220 === 3.6.4 Analog Input Interface ===
1221
1222 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:
1223
1224 **AC2 = (IN2 voltage )/12**
1225
1226 [[image:1653357592296-182.png]]
1227
1228 Example to connect a 4~~20mA sensor
1229
1230 We take the wind speed sensor as an example for reference only.
1231
1232 Specifications of the wind speed sensor:
1233
1234 Red:12~~24v
1235
1236 Yellow:4~~20mA
1237
1238 Black:GND
1239
1240
1241 Connection diagram:
1242
1243 [[image:1653357640609-758.png]]
1244
1245 [[image:1653357648330-671.png||height="155" width="733"]]
1246
1247 === 3.6.5 Relay Output ===
1248
1249 (((
1250 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:
1251 )))
1252
1253 [[image:image-20220524100215-9.png]]
1254
1255 [[image:image-20220524100215-10.png||height="382" width="723"]]
1256
1257 == 3.7 LEDs Indicators ==
1258
1259 [[image:image-20220524100748-11.png]]
1260
1261 = 4. Use AT Command =
1262
1263 == 4.1 Access AT Command ==
1264
1265 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.
1266
1267 [[image:1653358238933-385.png]]
1268
1269 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:
1270
1271 [[image:1653358355238-883.png]]
1272
1273 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/]]
1274
1275 (((
1276 AT+<CMD>?        : Help on <CMD>
1277 )))
1278
1279 (((
1280 AT+<CMD>         : Run <CMD>
1281 )))
1282
1283 (((
1284 AT+<CMD>=<value> : Set the value
1285 )))
1286
1287 (((
1288 AT+<CMD>=?       : Get the value
1289 )))
1290
1291 (((
1292 ATZ: Trig a reset of the MCU
1293 )))
1294
1295 (((
1296 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1297 )))
1298
1299 (((
1300 AT+DEUI: Get or Set the Device EUI
1301 )))
1302
1303 (((
1304 AT+DADDR: Get or Set the Device Address
1305 )))
1306
1307 (((
1308 AT+APPKEY: Get or Set the Application Key
1309 )))
1310
1311 (((
1312 AT+NWKSKEY: Get or Set the Network Session Key
1313 )))
1314
1315 (((
1316 AT+APPSKEY: Get or Set the Application Session Key
1317 )))
1318
1319 (((
1320 AT+APPEUI: Get or Set the Application EUI
1321 )))
1322
1323 (((
1324 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1325 )))
1326
1327 (((
1328 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1329 )))
1330
1331 (((
1332 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1333 )))
1334
1335 (((
1336 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1337 )))
1338
1339 (((
1340 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1341 )))
1342
1343 (((
1344 AT+RX2FQ: Get or Set the Rx2 window frequency
1345 )))
1346
1347 (((
1348 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1349 )))
1350
1351 (((
1352 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1353 )))
1354
1355 (((
1356 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1357 )))
1358
1359 (((
1360 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1361 )))
1362
1363 (((
1364 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1365 )))
1366
1367 (((
1368 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1369 )))
1370
1371 (((
1372 AT+NWKID: Get or Set the Network ID
1373 )))
1374
1375 (((
1376 AT+FCU: Get or Set the Frame Counter Uplink
1377 )))
1378
1379 (((
1380 AT+FCD: Get or Set the Frame Counter Downlink
1381 )))
1382
1383 (((
1384 AT+CLASS: Get or Set the Device Class
1385 )))
1386
1387 (((
1388 AT+JOIN: Join network
1389 )))
1390
1391 (((
1392 AT+NJS: Get OTAA Join Status
1393 )))
1394
1395 (((
1396 AT+SENDB: Send hexadecimal data along with the application port
1397 )))
1398
1399 (((
1400 AT+SEND: Send text data along with the application port
1401 )))
1402
1403 (((
1404 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1405 )))
1406
1407 (((
1408 AT+RECV: Print last received data in raw format
1409 )))
1410
1411 (((
1412 AT+VER: Get current image version and Frequency Band
1413 )))
1414
1415 (((
1416 AT+CFM: Get or Set the confirmation mode (0-1)
1417 )))
1418
1419 (((
1420 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1421 )))
1422
1423 (((
1424 AT+SNR: Get the SNR of the last received packet
1425 )))
1426
1427 (((
1428 AT+RSSI: Get the RSSI of the last received packet
1429 )))
1430
1431 (((
1432 AT+TDC: Get or set the application data transmission interval in ms
1433 )))
1434
1435 (((
1436 AT+PORT: Get or set the application port
1437 )))
1438
1439 (((
1440 AT+DISAT: Disable AT commands
1441 )))
1442
1443 (((
1444 AT+PWORD: Set password, max 9 digits
1445 )))
1446
1447 (((
1448 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1449 )))
1450
1451 (((
1452 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1453 )))
1454
1455 (((
1456 AT+CFG: Print all settings
1457 )))
1458
1459 == 4.2 Common AT Command Sequence ==
1460
1461 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1462
1463 (((
1464 If device has not joined network yet:
1465 )))
1466
1467 (((
1468 (% style="background-color:#dcdcdc" %)123456
1469 )))
1470
1471 (((
1472 (% style="background-color:#dcdcdc" %)AT+FDR
1473 )))
1474
1475 (((
1476 (% style="background-color:#dcdcdc" %)123456
1477 )))
1478
1479 (((
1480 (% style="background-color:#dcdcdc" %)AT+NJM=0
1481 )))
1482
1483 (((
1484 (% style="background-color:#dcdcdc" %)ATZ
1485 )))
1486
1487
1488 (((
1489 If device already joined network:
1490 )))
1491
1492 (((
1493 (% style="background-color:#dcdcdc" %)AT+NJM=0
1494 )))
1495
1496 (((
1497 (% style="background-color:#dcdcdc" %)ATZ
1498 )))
1499
1500 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1501
1502 (((
1503 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1504 )))
1505
1506 (((
1507 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1508 )))
1509
1510 (((
1511 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1512 )))
1513
1514 (((
1515 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1516 )))
1517
1518 (((
1519 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1520 )))
1521
1522 (((
1523 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1524 )))
1525
1526 (((
1527 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1528 )))
1529
1530 (((
1531 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1532 )))
1533
1534 (((
1535 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1536 )))
1537
1538 (((
1539 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1540 )))
1541
1542 (((
1543 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1544 )))
1545
1546 (((
1547 (% 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.
1548 )))
1549
1550 (((
1551 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1552 )))
1553
1554 (((
1555 (% style="color:red" %)**Note:**
1556 )))
1557
1558 (((
1559 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1560 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1561 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.
1562 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
1563 )))
1564
1565 (((
1566 [[image:1653359097980-169.png||height="188" width="729"]]
1567 )))
1568
1569 (((
1570
1571 )))
1572
1573 === 4.2.3 Change to Class A ===
1574
1575 If sensor JOINED
1576 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1577 ATZ
1578
1579 = 5. FAQ =
1580
1581 == 5.1 How to upgrade the image? ==
1582
1583 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1584
1585 * Support new features
1586 * For bug fix
1587 * Change LoRaWAN bands.
1588 Below shows the hardware connection for how to upload an image to the LT:
1589 * [[image:1653359603330-121.png]]
1590
1591 **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]].
1592 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1593 **Step3: **Open flashloader; choose the correct COM port to update.
1594 **For LT-22222-L**:
1595 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.
1596
1597 [[image:image-20220524103407-12.png]]
1598
1599 [[image:image-20220524103429-13.png]]
1600
1601 [[image:image-20220524104033-15.png]]
1602
1603 (% 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:
1604
1605 [[image:1653360054704-518.png||height="186" width="745"]]
1606
1607 (((
1608 (((
1609 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1610 )))
1611 )))
1612
1613 (((
1614 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.
1615 )))
1616
1617 (((
1618 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1619 )))
1620
1621 (((
1622 (((
1623 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1624 )))
1625 )))
1626
1627 (((
1628 (((
1629 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1630 )))
1631 )))
1632
1633 (((
1634 (% 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.
1635 )))
1636
1637 (((
1638 [[image:1653360231087-571.png||height="401" width="727"]]
1639 )))
1640
1641 (% 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.
1642
1643 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1644
1645 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1646 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1647 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1648 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1649 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1650 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1651 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1652 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1653 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1654 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1655
1656 As shown in below:
1657
1658 [[image:1653360498588-932.png||height="485" width="726"]]
1659
1660 == 5.4 Can I see counting event in Serial? ==
1661
1662 (((
1663 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.
1664 )))
1665
1666 (((
1667 = 6. Trouble Shooting =
1668 )))
1669
1670 (((
1671 (((
1672 == 6.1 Downlink doesn’t work, how to solve it? ==
1673 )))
1674 )))
1675
1676 (((
1677 Please see this link for how to debug:
1678
1679 [[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/]]
1680 )))
1681
1682 (((
1683 [[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]]
1684 )))
1685
1686 (((
1687 == 6.2 Have trouble to upload image. ==
1688 )))
1689
1690 (((
1691 See this link for trouble shooting:
1692 )))
1693
1694 (((
1695 [[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]]
1696 )))
1697
1698 (((
1699 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1700 )))
1701
1702 (((
1703 It might be about the channels mapping. Please see this link for detail:
1704 )))
1705
1706 (((
1707 [[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]]
1708 )))
1709
1710 (((
1711 = 7. Order Info =
1712 )))
1713
1714 (((
1715 (((
1716 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1717 )))
1718 )))
1719
1720 (((
1721 (((
1722 (% style="color:#4f81bd" %)**XXX:**
1723 )))
1724 )))
1725
1726 * (((
1727 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1728 )))
1729 * (((
1730 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1731 )))
1732 * (((
1733 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1734 )))
1735 * (((
1736 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1737 )))
1738 * (((
1739 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1740 )))
1741 * (((
1742 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1743 )))
1744 * (((
1745 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1746 )))
1747 * (((
1748 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1749 )))
1750
1751 (((
1752 * (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1753
1754 = 8. Packing Info =
1755 )))
1756
1757 (((
1758 (((
1759 **Package Includes**:
1760 )))
1761 )))
1762
1763 (((
1764 (((
1765 * LT-22222-L I/O Controller x 1
1766 * Stick Antenna for LoRa RF part x 1
1767 * Bracket for controller x1
1768 * Program cable x 1
1769 )))
1770 )))
1771
1772 (((
1773 (((
1774 **Dimension and weight**:
1775 )))
1776 )))
1777
1778 (((
1779 (((
1780 * Device Size: 13.5 x 7 x 3 cm
1781 * Device Weight: 105g
1782 * Package Size / pcs : 14.5 x 8 x 5 cm
1783 * Weight / pcs : 170g
1784 )))
1785 )))
1786
1787 (((
1788 = 9. Support =
1789 )))
1790
1791 * (((
1792 (((
1793 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.
1794 )))
1795 )))
1796 * (((
1797 (((
1798 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
1799 )))
1800 )))
1801
1802 (((
1803 (((
1804 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
1805 )))
1806
1807 (((
1808 = 10. Reference​​​​​ =
1809
1810 * Product Page:
1811
1812 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]]
1813
1814 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
1815 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1816 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
1817 )))
1818 )))