Version 68.6 by Xiaoling on 2022/05/25 14:44
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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>>||anchor="H4.UseATCommand"]] to set the keys in the devices.
208 )))
209
210 == 3.2 Example to join LoRaWAN network ==
211
212 (((
213 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. 
214 )))
215
216 [[image:image-20220523172350-1.png||height="266" width="864"]]
217
218 (((
219 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:
220 )))
221
222 (((
223 **Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
224 )))
225
226 (((
227 Each LT is shipped with a sticker with the default device EUI as below:
228 )))
229
230 [[image:1653297924498-393.png]]
231
232 Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
233
234 Add APP EUI in the application.
235
236 [[image:1653297955910-247.png||height="321" width="716"]]
237
238 Add APP KEY and DEV EUI
239
240 [[image:1653298023685-319.png]]
241
242 (((
243 **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.
244 )))
245
246 [[image:1653298044601-602.png||height="405" width="709"]]
247
248 == 3.3 Uplink Payload ==
249
250 There are five working modes + one interrupt mode on LT for different type application:
251
252 * **MOD1**: (default setting): 2 x ACI + 2AVI + DI + DO + RO
253 * **MOD2**: Double DI Counting + DO + RO
254 * **MOD3**: Single DI Counting + 2 x ACI + DO + RO
255 * **MOD4**: Single DI Counting + 1 x Voltage Counting + DO + RO
256 * **MOD5**: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
257 * **ADDMOD6**: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
258
259 === 3.3.1 AT+MOD~=1, 2ACI+2AVI ===
260
261 The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
262
263 [[image:image-20220523174024-3.png]]
264
265 (((
266 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
267 )))
268
269 [[image:image-20220523174254-4.png]]
270
271 * RO is for relay. ROx=1 : close，ROx=0 always open.
272 * DI is for digital input. DIx=1: high or float, DIx=0: low.
273 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
274
275 (% style="color:red" %)Note: DI3 and DO3 bit are not valid for LT-22222-L
276
277 For example if payload is: [[image:image-20220523175847-2.png]]
278
279 **The value for the interface is:  **
280
281 AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
282
283 AVI2 channel voltage is 0x04AC/1000=1.196V
284
285 ACI1 channel current is 0x1310/1000=4.880mA
286
287 ACI2 channel current is 0x1300/1000=4.864mA
288
289 The last byte 0xAA= 10101010(B) means
290
291 * [1] RO1 relay channel is close and the RO1 LED is ON.
292 * [0] RO2 relay channel is open and RO2 LED is OFF;
293
294 **LT22222-L:**
295
296 * [1] DI2 channel is high input and DI2 LED is ON;
297 * [0] DI1 channel is low input;
298
299 * [0] DO3 channel output state
300 ** DO3 is float in case no load between DO3 and V+.;
301 ** DO3 is high in case there is load between DO3 and V+.
302 ** DO3 LED is off in both case
303 * [1] DO2 channel output is low and DO2 LED is ON.
304 * [0] DO1 channel output state
305 ** DO1 is float in case no load between DO1 and V+.;
306 ** DO1 is high in case there is load between DO1 and V+.
307 ** DO1 LED is off in both case
308
309 === 3.3.2 AT+MOD~=2, (Double DI Counting) ===
310
311 **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
312
313 (((
314 Total : 11 bytes payload
315 )))
316
317 [[image:image-20220523180452-3.png]]
318
319 (((
320 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
321 )))
322
323 [[image:image-20220523180506-4.png]]
324
325 * RO is for relay. ROx=1 : close，ROx=0 always open.
326 * FIRST: Indicate this is the first packet after join network.
327 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
328
329 (((
330 (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
331 )))
332
333 (((
334 **To use counting mode, please run:**
335 )))
336
337 (% class="box infomessage" %)
338 (((
339 (((
340 **AT+MOD=2**
341 )))
342 )))
343
344 (% class="box infomessage" %)
345 (((
346 (((
347 **ATZ**
348 )))
349 )))
350
351 (((
352 (% style="color:#4f81bd" %)**AT Commands for counting:**
353 )))
354
355 (((
356 **For LT22222-L:**
357 )))
358
359 (% class="box infomessage" %)
360 (((
361 (((
362 **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
363 )))
364 )))
365
366 (% class="box infomessage" %)
367 (((
368 (((
369 **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
370 )))
371 )))
372
373 (% class="box infomessage" %)
374 (((
375 (((
376 **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
377 )))
378 )))
379
380 (% class="box infomessage" %)
381 (((
382 (((
383 **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
384 )))
385 )))
386
387 (% class="box infomessage" %)
388 (((
389 (((
390 **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
391 )))
392 )))
393
394 (% class="box infomessage" %)
395 (((
396 (((
397 **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
398 )))
399 )))
400
401 === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
402
403 **LT22222-L**: This mode the DI1 is used as a counting pin.
404
405 [[image:image-20220523181246-5.png]]
406
407 (((
408 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
409 )))
410
411 [[image:image-20220523181301-6.png]]
412
413 * RO is for relay. ROx=1 : close，ROx=0 always open.
414 * FIRST: Indicate this is the first packet after join network.
415 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
416
417 (((
418 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
419 )))
420
421 (((
422 **To use counting mode, please run:**
423 )))
424
425 (% class="box infomessage" %)
426 (((
427 (((
428 **AT+MOD=3**
429 )))
430 )))
431
432 (% class="box infomessage" %)
433 (((
434 (((
435 **ATZ**
436 )))
437 )))
438
439 (((
440 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
441 )))
442
443 === 3.3.4 AT+MOD~=4, Single DI Counting + 1 x Voltage Counting ===
444
445 **LT22222-L**: This mode the DI1 is used as a counting pin.
446
447 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.
448
449 [[image:image-20220523181903-8.png]]
450
451 (((
452 (% style="color:#4f81bd" %)**DIDORO **(%%)is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
453 )))
454
455 [[image:image-20220523181727-7.png]]
456
457 * RO is for relay. ROx=1 : close，ROx=0 always open.
458 * FIRST: Indicate this is the first packet after join network.
459 * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
460
461 (((
462 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
463 )))
464
465 (((
466 **To use this mode, please run:**
467 )))
468
469 (% class="box infomessage" %)
470 (((
471 (((
472 **AT+MOD=4**
473 )))
474 )))
475
476 (% class="box infomessage" %)
477 (((
478 (((
479 **ATZ**
480 )))
481 )))
482
483 (((
484
485 )))
486
487 (((
488 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
489 )))
490
491 (((
492 **Plus below command for AVI1 Counting:**
493 )))
494
495 (% class="box infomessage" %)
496 (((
497 (((
498 **AT+SETCNT=3,60   (set AVI Count to 60)**
499 )))
500 )))
501
502 (% class="box infomessage" %)
503 (((
504 (((
505 **AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)**
506 )))
507 )))
508
509 (% class="box infomessage" %)
510 (((
511 (((
512 **AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)**
513 )))
514 )))
515
516 (% class="box infomessage" %)
517 (((
518 (((
519 **AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)**
520 )))
521 )))
522
523 === 3.3.5 AT+MOD~=5, Single DI Counting + 2 x AVI + 1 x ACI ===
524
525 **LT22222-L**: This mode the DI1 is used as a counting pin.
526
527 [[image:image-20220523182334-9.png]]
528
529 (((
530 (% style="color:#4f81bd" %)**DIDORO**(%%) is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
531 )))
532
533 * RO is for relay. ROx=1 : close，ROx=0 always open.
534 * FIRST: Indicate this is the first packet after join network.
535 * (((
536 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
537 )))
538
539 (((
540 (% style="color:red" %)Note: DO3 is not valid for LT-22222-L.
541 )))
542
543 (((
544 **To use this mode, please run:**
545 )))
546
547 (% class="box infomessage" %)
548 (((
549 (((
550 **AT+MOD=5**
551 )))
552 )))
553
554 (% class="box infomessage" %)
555 (((
556 (((
557 **ATZ**
558 )))
559 )))
560
561 (((
562 Other AT Commands for counting are similar to [[MOD2 Counting Command>>||anchor="H3.3.2AT2BMOD3D22C28DoubleDICounting29"]].
563 )))
564
565 === 3.3.6 AT+ADDMOD~=6. (Trigger Mode, Optional) ===
566
567 (% style="color:#4f81bd" %)**This mode is an optional mode for trigger purpose. It can run together with other mode.**
568
569 For example, if user has configured below commands:
570
571 * **AT+MOD=1 ** **~-~->** The normal working mode
572 * **AT+ADDMOD6=1**   **~-~->** Enable trigger
573
574 LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
575
576 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
577 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.**
578
579 **AT Command to set Trigger Condition**:
580
581 (% style="color:#4f81bd" %)**Trigger base on voltage**:
582
583 Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
584
585 **Example:**
586
587 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)
588
589 AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
590
591 (% style="color:#4f81bd" %)**Trigger base on current**:
592
593 Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
594
595 **Example:**
596
597 AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
598
599 (% style="color:#4f81bd" %)**Trigger base on DI status**:
600
601 DI status trigger Flag.
602
603 Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
604
605 **Example:**
606
607 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
608
609
610 **Downlink Command to set Trigger Condition**
611
612 Type Code: 0xAA. Downlink command same as AT Command **AT+AVLIM, AT+ACLIM**
613
614 Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
615
616 AA: Code for this downlink Command:
617
618 xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
619
620 yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
621
622 yy2 yy2: AC1 or AV1 high limit.
623
624 yy3 yy3: AC2 or AV2 low limit.
625
626 Yy4 yy4: AC2 or AV2 high limit.
627
628 **Example1**: AA 00 13 88 00 00 00 00 00 00
629
630 Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
631
632 **Example2**: AA 02 01 00
633
634 Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
635
636 (% style="color:#4f81bd" %)**Trigger Settings Payload Explanation:**
637
638 MOD6 Payload : total 11 bytes payload
639
640 [[image:image-20220524085923-1.png]]
641
642 (% style="color:#4f81bd" %)**TRI FLAG1**(%%) is a combination to show if trigger is set for this part. Totally 1byte as below
643
644 [[image:image-20220524090106-2.png]]
645
646 * Each bits shows if the corresponding trigger has been configured.
647
648 **Example:**
649
650 10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
651
652
653 (% style="color:#4f81bd" %)**TRI Status1**(%%) is a combination to show which condition is trigger. Totally 1byte as below
654
655 [[image:image-20220524090249-3.png]]
656
657 * Each bits shows which status has been trigger on this uplink.
658
659 **Example:**
660
661 10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
662
663
664 (% style="color:#4f81bd" %)**TRI_DI FLAG+STA **(%%)is a combination to show which condition is trigger. Totally 1byte as below
665
666 [[image:image-20220524090456-4.png]]
667
668 * Each bits shows which status has been trigger on this uplink.
669
670 **Example:**
671
672 00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
673
674 00000101: Means both DI1 and DI2 trigger are enabled.
675
676
677 (% style="color:#4f81bd" %)**Enable/Disable MOD6 **(%%): 0x01: MOD6 is enable. 0x00: MOD6 is disable.
678
679 Downlink command to poll MOD6 status:
680
681 **AB 06**
682
683 When device got this command, it will send the MOD6 payload.
684
685 === 3.3.7 Payload Decoder ===
686
687 (((
688 **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/]]
689 )))
690
691 == 3.4 ​Configure LT via AT or Downlink ==
692
693 User can configure LT I/O Controller via AT Commands or LoRaWAN Downlink Commands
694
695 (((
696 There are two kinds of Commands:
697 )))
698
699 * (% 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
700
701 * (% style="color:#4f81bd" %)**Sensor Related Commands**(%%): These commands are special designed for LT-22222-L.  User can see these commands below:
702
703 === 3.4.1 Common Commands ===
704
705 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>>End_Device_AT_Commands_and_Downlink_Command]]
706
707 === 3.4.2 Sensor related commands ===
708
709 ==== 3.4.2.1 Set Transmit Interval ====
710
711 Set device uplink interval.
712
713 * AT Command:
714
715 (% class="box infomessage" %)
716 (((
717 **AT+TDC=N **
718 )))
719
720 **Example: **AT+TDC=30000. Means set interval to 30 seconds
721
722 * Downlink Payload (prefix 0x01):
723
724 (% class="box infomessage" %)
725 (((
726 **0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)**
727 )))
728
729 ==== 3.4.2.2 Set Work Mode (AT+MOD) ====
730
731 Set work mode.
732
733 * AT Command:
734
735 (% class="box infomessage" %)
736 (((
737 **AT+MOD=N  **
738 )))
739
740 **Example**: AT+MOD=2. Set work mode to Double DI counting mode
741
742 * Downlink Payload (prefix 0x0A):
743
744 (% class="box infomessage" %)
745 (((
746 **0x0A aa     ~/~/ Same as AT+MOD=aa**
747 )))
748
749 ==== 3.4.2.3 Poll an uplink ====
750
751 * AT Command:
752
753 There is no AT Command to poll uplink
754
755 * Downlink Payload (prefix 0x08):
756
757 (% class="box infomessage" %)
758 (((
759 **0x08 FF     ~/~/ Poll an uplink,**
760 )))
761
762 **Example**: 0x08FF, ask device to send an Uplink
763
764 ==== 3.4.2.4 Enable Trigger Mode ====
765
766 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]]
767
768 * AT Command:
769
770 (% class="box infomessage" %)
771 (((
772 **AT+ADDMOD6=1 or 0**
773 )))
774
775 1: Enable Trigger Mode
776
777 0: Disable Trigger Mode
778
779 * Downlink Payload (prefix 0x0A 06):
780
781 (% class="box infomessage" %)
782 (((
783 **0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,**
784 )))
785
786 ==== 3.4.2.5 Poll trigger settings ====
787
788 Poll trigger settings,
789
790 * AT Command:
791
792 There is no AT Command for this feature.
793
794 * Downlink Payload (prefix 0x AB 06):
795
796 (% class="box infomessage" %)
797 (((
798 **0xAB 06  ~/~/ Poll trigger settings, device will uplink trigger settings once receive this command**
799 )))
800
801 ==== 3.4.2.6 Enable / Disable DI1/DI2/DI3 as trigger ====
802
803 Enable Disable DI1/DI2/DI2 as trigger,
804
805 * AT Command:
806
807 (% class="box infomessage" %)
808 (((
809 **Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >**
810 )))
811
812 **Example:**
813
814 AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
815
816 * Downlink Payload (prefix 0xAA 02):
817
818 (% class="box infomessage" %)
819 (((
820 **0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb**
821 )))
822
823 ==== 3.4.2.7 Trigger1 – Set DI1 or DI3 as trigger ====
824
825 Set DI1 or DI3(for LT-33222-L) trigger.
826
827 * AT Command:
828
829 (% class="box infomessage" %)
830 (((
831 **AT+TRIG1=a,b**
832 )))
833
834 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
835
836 b : delay timing.
837
838 **Example:**
839
840 AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
841
842 * Downlink Payload (prefix 0x09 01 ):
843
844 (% class="box infomessage" %)
845 (((
846 **0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
847 )))
848
849 ==== 3.4.2.8 Trigger2 – Set DI2 as trigger ====
850
851 Set DI2 trigger.
852
853 * AT Command:
854
855 (% class="box infomessage" %)
856 (((
857 **AT+TRIG2=a,b**
858 )))
859
860 a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
861
862 b : delay timing.
863
864 **Example:**
865
866 AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
867
868 * Downlink Payload (prefix 0x09 02 ):
869
870 (% class="box infomessage" %)
871 (((
872 **0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)**
873 )))
874
875 ==== 3.4.2.9 Trigger – Set AC (current) as trigger ====
876
877 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]]
878
879 * AT Command:
880
881 (% class="box infomessage" %)
882 (((
883 **AT+ACLIM. **
884 )))
885
886 * Downlink Payload (prefix 0xAA 01 ):
887
888 (% class="box infomessage" %)
889 (((
890 **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]]**
891 )))
892
893 ==== 3.4.2.10 Trigger – Set AV (voltage) as trigger ====
894
895 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]]
896
897 * AT Command:
898
899 (% class="box infomessage" %)
900 (((
901 **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]]**
902 )))
903
904 * Downlink Payload (prefix 0xAA 00 ):
905
906 (% class="box infomessage" %)
907 (((
908 **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]] **
909 )))
910
911 ==== 3.4.2.11 Trigger – Set minimum interval ====
912
913 Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
914
915 * AT Command:
916
917 (% class="box infomessage" %)
918 (((
919 **AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.**
920 )))
921
922 * Downlink Payload (prefix 0xAC ):
923
924 (% class="box infomessage" %)
925 (((
926 **0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)**
927 )))
928
929 ==== 3.4.2.12 DO ~-~- Control Digital Output DO1/DO2/DO3 ====
930
931 * AT Command:
932
933 There is no AT Command to control Digital Output
934
935 * Downlink Payload (prefix 0x02):
936
937 (% class="box infomessage" %)
938 (((
939 **0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output**
940 )))
941
942 (((
943 If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
944 )))
945
946 (((
947 01: Low,  00: High ,  11: No action
948 )))
949
950 [[image:image-20220524092754-5.png]]
951
952 (((
953 (% style="color:red" %)Note: For LT-22222-L, there is no DO3, the last byte can use any value.
954 )))
955
956 (((
957 (% style="color:red" %)Device will upload a packet if downlink code executes successfully.
958 )))
959
960
961 ==== 3.4.2.13 DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
962
963 * AT Command:
964
965 There is no AT Command to control Digital Output
966
967 * Downlink Payload (prefix 0xA9):
968
969 (% class="box infomessage" %)
970 (((
971 (((
972 **0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control**
973 )))
974 )))
975
976 This is to control the digital output time of DO pin. Include four bytes:
977
978 (% style="color:#4f81bd" %)**First Byte**(%%)**:** Type code (0xA9)
979
980 (% style="color:#4f81bd" %)**Second Byte**(%%): Inverter Mode
981
982 01: DO pins will change back to original state after timeout.
983
984 00: DO pins will change to an inverter state after timeout 
985
986 (% style="color:#4f81bd" %)**Third Byte**(%%): Control Method and Ports status:
987
988 [[image:image-20220524093238-6.png]]
989
990 (% style="color:#4f81bd" %)**Fourth Byte**(%%): Control Method and Ports status:
991
992 [[image:image-20220524093328-7.png]]
993
994 (% style="color:#4f81bd" %)**Fifth Byte**(%%): Control Method and Ports status:
995
996 [[image:image-20220524093351-8.png]]
997
998 (% style="color:#4f81bd" %)**Sixth and Seventh Byte**:
999
1000 Latching time. Unit: ms
1001
1002 Device will upload a packet if downlink code executes successfully.
1003
1004 **Example payload:**
1005
1006 **~1. A9 01 01 01 01 07 D0**
1007
1008 DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1009
1010 **2. A9 01 00 01 11 07 D0**
1011
1012 DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1013
1014 **3. A9 00 00 00 00 07 D0**
1015
1016 DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1017
1018 **4. A9 00 11 01 00 07 D0**
1019
1020 DO1 pin no action, DO2 pin set low, DO3 pin set high, last 2 seconds, then DO1 pin no action, DO2 pin set high, DO3 pin set low
1021
1022
1023 === 3.4.2.14 Relay ~-~- Control Relay Output RO1/RO2 ===
1024
1025 * AT Command:
1026
1027 There is no AT Command to control Relay Output
1028
1029 * Downlink Payload (prefix 0x03):
1030
1031 (% class="box infomessage" %)
1032 (((
1033 **0x03 aa bb     ~/~/ Set RO1/RO2 output**
1034 )))
1035
1036 (((
1037 If payload = 0x030100, it means set RO1 to close and RO2 to open.
1038 )))
1039
1040 (((
1041 01: Close ,  00: Open , 11: No action
1042 )))
1043
1044 (((
1045 [[image:image-20220524093724-9.png]]
1046 )))
1047
1048 Device will upload a packet if downlink code executes successfully.
1049
1050
1051 ==== 3.4.2.15 Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1052
1053 * AT Command:
1054
1055 There is no AT Command to control Relay Output
1056
1057 * Downlink Payload (prefix 0x05):
1058
1059 (% class="box infomessage" %)
1060 (((
1061 **0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:**
1062 )))
1063
1064 This is to control the relay output time of relay. Include four bytes:
1065
1066 (% style="color:#4f81bd" %)**First Byte **(%%)**:** Type code (0x05)
1067
1068 (% style="color:#4f81bd" %)**Second Byte(aa)**(%%): Inverter Mode
1069
1070 01: Relays will change back to original state after timeout.
1071
1072 00: Relays will change to an inverter state after timeout
1073
1074 (% style="color:#4f81bd" %)**Third Byte(bb)**(%%): Control Method and Ports status:
1075
1076 [[image:image-20220524093831-10.png]]
1077
1078 (% style="color:#4f81bd" %)**Fourth/Fifth Bytes(cc)**(%%): Latching time. Unit: ms
1079
1080 Device will upload a packet if downlink code executes successfully.
1081
1082 **Example payload:**
1083
1084 **~1. 05 01 11 07 D0**
1085
1086 Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1087
1088 **2. 05 01 10 07 D0**
1089
1090 Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1091
1092 **3. 05 00 01 07 D0**
1093
1094 Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1095
1096 **4. 05 00 00 07 D0**
1097
1098 Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1099
1100
1101 ==== 3.4.2.16 Counting ~-~- Voltage threshold counting ====
1102
1103 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]]
1104
1105 * AT Command:
1106
1107 (% class="box infomessage" %)
1108 (((
1109 **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]]**
1110 )))
1111
1112 * Downlink Payload (prefix 0xA5):
1113
1114 (% class="box infomessage" %)
1115 (((
1116 **0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc**
1117 )))
1118
1119 ==== 3.4.2.17 Counting ~-~- Pre-configure the Count Number ====
1120
1121 * AT Command:
1122
1123 (% class="box infomessage" %)
1124 (((
1125 **AT+SETCNT=aa,(bb cc dd ee) **
1126 )))
1127
1128 aa: 1: Set count1,
1129
1130 2: Set count2,
1131
1132 3: Set AV1 count
1133
1134 Bb cc dd ee: number to be set
1135
1136 * Downlink Payload (prefix 0xA8):
1137
1138 (% class="box infomessage" %)
1139 (((
1140 **0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)**
1141 )))
1142
1143 ==== 3.4.2.18 Counting ~-~- Clear Counting ====
1144
1145 Clear counting for counting mode
1146
1147 * AT Command:
1148
1149 (% class="box infomessage" %)
1150 (((
1151 **AT+CLRCOUNT ~/~/ clear all counting**
1152 )))
1153
1154 * Downlink Payload (prefix 0xA6):
1155
1156 (% class="box infomessage" %)
1157 (((
1158 **0x A6 01     ~/~/ clear all counting,**
1159 )))
1160
1161 ==== 3.4.2.19 Counting ~-~- Change counting mode save time ====
1162
1163 * AT Command:
1164
1165 (% class="box infomessage" %)
1166 (((
1167 **AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)**
1168 )))
1169
1170 * Downlink Payload (prefix 0xA7):
1171
1172 (% class="box infomessage" %)
1173 (((
1174 **0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,**
1175 )))
1176
1177 (((
1178 range: aa bb cc:0 to 16777215,  (unit:second)
1179 )))
1180
1181 == 3.5 Integrate with Mydevice ==
1182
1183 Mydevices provides a human friendly interface to show the sensor data, once we have data in TTN, we can use Mydevices to connect to TTN and see the data in Mydevices. Below are the steps:
1184
1185 (((
1186 **Step 1**: Be sure that your device is programmed and properly connected to the network at this time.
1187 )))
1188
1189 (((
1190 **Step 2**: To configure the Application to forward data to Mydevices you will need to add integration. To add the Mydevices integration, perform the following steps:
1191 )))
1192
1193 [[image:1653356737703-362.png||height="232" width="732"]]
1194
1195 [[image:image-20220524094641-11.png||height="390" width="723"]]
1196
1197 [[image:image-20220524094641-12.png||height="402" width="718"]]
1198
1199 **Step 3**: Create an account or log in Mydevices.
1200
1201 **Step 4**: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.(% style="display:none" %)
1202
1203 Search under The things network
1204
1205 [[image:1653356838789-523.png||height="337" width="740"]]
1206
1207 After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1208
1209 [[image:image-20220524094909-1.png||height="335" width="729"]]
1210
1211 [[image:image-20220524094909-2.png||height="337" width="729"]]
1212
1213 [[image:image-20220524094909-3.png||height="338" width="727"]]
1214
1215 [[image:image-20220524094909-4.png||height="339" width="728"]](% style="display:none" %)
1216
1217 [[image:image-20220524094909-5.png||height="341" width="734"]]
1218
1219 == 3.6 Interface Detail ==
1220
1221 === 3.6.1 Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active ) ===
1222
1223 Support NPN Type sensor
1224
1225 [[image:1653356991268-289.png]]
1226
1227 === 3.6.2 Digital Input Port: DI1/DI2 ( For LT-22222-L) ===
1228
1229 (((
1230 The DI port of LT-22222-L can support NPN or PNP output sensor.
1231 )))
1232
1233 (((
1234 (((
1235 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
1236 )))
1237 )))
1238
1239 [[image:1653357170703-587.png]]
1240
1241 (((
1242 When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1243 )))
1244
1245
1246 **Example1**: Connect to a Low active sensor.
1247
1248 This type of sensor will output a low signal GND when active.
1249
1250 * Connect sensor’s output to DI1-
1251 * Connect sensor’s VCC to DI1+.
1252
1253 So when sensor active, the current between NEC2501 pin1 and pin2 is： ​​
1254
1255 [[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:/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.**
1256
1257 If DI1+ = 12v, the //IF// = 12mA , So the LT-22222-L will be able to detect this active signal.
1258
1259
1260 **Example2**: Connect to a High active sensor.
1261
1262 This type of sensor will output a high signal (example 24v) when active.
1263
1264 * Connect sensor’s output to DI1+
1265 * Connect sensor’s GND DI1-.
1266
1267 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1268
1269 [[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:/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.**
1270
1271 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:/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.
1272
1273
1274 **Example3**: Connect to a 220v high active sensor.
1275
1276 Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler  
1277
1278 * Connect sensor’s output to DI1+ with a serial 50K resistor
1279 * Connect sensor’s GND DI1-.
1280
1281 So when sensor active, the current between NEC2501 pin1 and pin2 is:
1282
1283 [[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:/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.**
1284
1285 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.
1286
1287 === 3.6.3 Digital Output Port: DO1/DO2 /DO3 ===
1288
1289 NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1290
1291 [[image:1653357531600-905.png]]
1292
1293 === 3.6.4 Analog Input Interface ===
1294
1295 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:
1296
1297 **AC2 = (IN2 voltage )/12**
1298
1299 [[image:1653357592296-182.png]]
1300
1301 Example to connect a 4~~20mA sensor
1302
1303 We take the wind speed sensor as an example for reference only.
1304
1305 Specifications of the wind speed sensor:
1306
1307 Red:12~~24v
1308
1309 Yellow:4~~20mA
1310
1311 Black:GND
1312
1313
1314 Connection diagram:
1315
1316 [[image:1653357640609-758.png]]
1317
1318 [[image:1653357648330-671.png||height="155" width="733"]]
1319
1320 === 3.6.5 Relay Output ===
1321
1322 (((
1323 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:
1324 )))
1325
1326 [[image:image-20220524100215-9.png]]
1327
1328 [[image:image-20220524100215-10.png||height="382" width="723"]]
1329
1330 == 3.7 LEDs Indicators ==
1331
1332 [[image:image-20220524100748-11.png]]
1333
1334 = 4. Use AT Command =
1335
1336 == 4.1 Access AT Command ==
1337
1338 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.
1339
1340 [[image:1653358238933-385.png]]
1341
1342 (((
1343 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:
1344 )))
1345
1346 [[image:1653358355238-883.png]]
1347
1348 (((
1349 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/]]
1350 )))
1351
1352 (((
1353 AT+<CMD>?        : Help on <CMD>
1354 )))
1355
1356 (((
1357 AT+<CMD>         : Run <CMD>
1358 )))
1359
1360 (((
1361 AT+<CMD>=<value> : Set the value
1362 )))
1363
1364 (((
1365 AT+<CMD>=?       : Get the value
1366 )))
1367
1368 (((
1369 ATZ: Trig a reset of the MCU
1370 )))
1371
1372 (((
1373 AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1374 )))
1375
1376 (((
1377 AT+DEUI: Get or Set the Device EUI
1378 )))
1379
1380 (((
1381 AT+DADDR: Get or Set the Device Address
1382 )))
1383
1384 (((
1385 AT+APPKEY: Get or Set the Application Key
1386 )))
1387
1388 (((
1389 AT+NWKSKEY: Get or Set the Network Session Key
1390 )))
1391
1392 (((
1393 AT+APPSKEY: Get or Set the Application Session Key
1394 )))
1395
1396 (((
1397 AT+APPEUI: Get or Set the Application EUI
1398 )))
1399
1400 (((
1401 AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1402 )))
1403
1404 (((
1405 AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1406 )))
1407
1408 (((
1409 AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1410 )))
1411
1412 (((
1413 AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1414 )))
1415
1416 (((
1417 AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1418 )))
1419
1420 (((
1421 AT+RX2FQ: Get or Set the Rx2 window frequency
1422 )))
1423
1424 (((
1425 AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1426 )))
1427
1428 (((
1429 AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1430 )))
1431
1432 (((
1433 AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1434 )))
1435
1436 (((
1437 AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1438 )))
1439
1440 (((
1441 AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1442 )))
1443
1444 (((
1445 AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1446 )))
1447
1448 (((
1449 AT+NWKID: Get or Set the Network ID
1450 )))
1451
1452 (((
1453 AT+FCU: Get or Set the Frame Counter Uplink
1454 )))
1455
1456 (((
1457 AT+FCD: Get or Set the Frame Counter Downlink
1458 )))
1459
1460 (((
1461 AT+CLASS: Get or Set the Device Class
1462 )))
1463
1464 (((
1465 AT+JOIN: Join network
1466 )))
1467
1468 (((
1469 AT+NJS: Get OTAA Join Status
1470 )))
1471
1472 (((
1473 AT+SENDB: Send hexadecimal data along with the application port
1474 )))
1475
1476 (((
1477 AT+SEND: Send text data along with the application port
1478 )))
1479
1480 (((
1481 AT+RECVB: Print last received data in binary format (with hexadecimal values)
1482 )))
1483
1484 (((
1485 AT+RECV: Print last received data in raw format
1486 )))
1487
1488 (((
1489 AT+VER: Get current image version and Frequency Band
1490 )))
1491
1492 (((
1493 AT+CFM: Get or Set the confirmation mode (0-1)
1494 )))
1495
1496 (((
1497 AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1498 )))
1499
1500 (((
1501 AT+SNR: Get the SNR of the last received packet
1502 )))
1503
1504 (((
1505 AT+RSSI: Get the RSSI of the last received packet
1506 )))
1507
1508 (((
1509 AT+TDC: Get or set the application data transmission interval in ms
1510 )))
1511
1512 (((
1513 AT+PORT: Get or set the application port
1514 )))
1515
1516 (((
1517 AT+DISAT: Disable AT commands
1518 )))
1519
1520 (((
1521 AT+PWORD: Set password, max 9 digits
1522 )))
1523
1524 (((
1525 AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1526 )))
1527
1528 (((
1529 AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1530 )))
1531
1532 (((
1533 AT+CFG: Print all settings
1534 )))
1535
1536 == 4.2 Common AT Command Sequence ==
1537
1538 === 4.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ===
1539
1540 (((
1541 If device has not joined network yet:
1542 )))
1543
1544 (((
1545 (% style="background-color:#dcdcdc" %)123456
1546 )))
1547
1548 (((
1549 (% style="background-color:#dcdcdc" %)AT+FDR
1550 )))
1551
1552 (((
1553 (% style="background-color:#dcdcdc" %)123456
1554 )))
1555
1556 (((
1557 (% style="background-color:#dcdcdc" %)AT+NJM=0
1558 )))
1559
1560 (((
1561 (% style="background-color:#dcdcdc" %)ATZ
1562 )))
1563
1564
1565 (((
1566 If device already joined network:
1567 )))
1568
1569 (((
1570 (% style="background-color:#dcdcdc" %)AT+NJM=0
1571 )))
1572
1573 (((
1574 (% style="background-color:#dcdcdc" %)ATZ
1575 )))
1576
1577 === 4.2.2 Single-channel ABP mode (Use with LG01/LG02) ===
1578
1579 (((
1580 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1581 )))
1582
1583 (((
1584 (% style="background-color:#dcdcdc" %) AT+FDR(%%)   Reset Parameters to Factory Default, Keys Reserve
1585 )))
1586
1587 (((
1588 (% style="background-color:#dcdcdc" %) 123456(%%)   Enter Password to have AT access.
1589 )))
1590
1591 (((
1592 (% style="background-color:#dcdcdc" %) AT+CLASS=C(%%) Set to work in CLASS C
1593 )))
1594
1595 (((
1596 (% style="background-color:#dcdcdc" %) AT+NJM=0(%%) Set to ABP mode
1597 )))
1598
1599 (((
1600 (% style="background-color:#dcdcdc" %) AT+ADR=0(%%) Set the Adaptive Data Rate Off
1601 )))
1602
1603 (((
1604 (% style="background-color:#dcdcdc" %) AT+DR=5(%%)  Set Data Rate
1605 )))
1606
1607 (((
1608 (% style="background-color:#dcdcdc" %) AT+TDC=60000(%%)  Set transmit interval to 60 seconds
1609 )))
1610
1611 (((
1612 (% style="background-color:#dcdcdc" %) AT+CHS=868400000(%%) Set transmit frequency to 868.4Mhz
1613 )))
1614
1615 (((
1616 (% style="background-color:#dcdcdc" %) AT+RX2FQ=868400000(%%) Set RX2Frequency to 868.4Mhz (according to the result from server)
1617 )))
1618
1619 (((
1620 (% style="background-color:#dcdcdc" %) AT+RX2DR=5(%%)  Set RX2DR to match the downlink DR from server. see below
1621 )))
1622
1623 (((
1624 (% 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.
1625 )))
1626
1627 (((
1628 (% style="background-color:#dcdcdc" %) ATZ         (%%) Reset MCU
1629 )))
1630
1631 (((
1632 (% style="color:red" %)**Note:**
1633 )))
1634
1635 (((
1636 (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1637 2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1638 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.
1639 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
1640 )))
1641
1642 (((
1643 [[image:1653359097980-169.png||height="188" width="729"]]
1644 )))
1645
1646 (((
1647
1648 )))
1649
1650 === 4.2.3 Change to Class A ===
1651
1652 If sensor JOINED
1653 (% style="background-color:#dcdcdc" %)AT+CLASS=A
1654 ATZ
1655
1656 = 5. FAQ =
1657
1658 == 5.1 How to upgrade the image? ==
1659
1660 The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1661
1662 * Support new features
1663 * For bug fix
1664 * Change LoRaWAN bands.
1665 Below shows the hardware connection for how to upload an image to the LT:
1666 * [[image:1653359603330-121.png]]
1667
1668 (((
1669 **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]].
1670 **Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1671 **Step3: **Open flashloader; choose the correct COM port to update.
1672 **For LT-22222-L**:
1673 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.
1674 )))
1675
1676 [[image:image-20220524103407-12.png]]
1677
1678 [[image:image-20220524103429-13.png]]
1679
1680 [[image:image-20220524104033-15.png]]
1681
1682 (% 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:
1683
1684 [[image:1653360054704-518.png||height="186" width="745"]]
1685
1686 (((
1687 (((
1688 == 5.2 How to change the LoRa Frequency Bands/Region? ==
1689 )))
1690 )))
1691
1692 (((
1693 User can follow the introduction for [[how to upgrade image>>||anchor="H5.1Howtoupgradetheimage3F"]]. When download the images, choose the required image file for download.
1694 )))
1695
1696 (((
1697 == 5.3 How to set up LT to work with Single Channel Gateway such as LG01/LG02? ==
1698 )))
1699
1700 (((
1701 (((
1702 In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1703 )))
1704 )))
1705
1706 (((
1707 (((
1708 Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1709 )))
1710 )))
1711
1712 (((
1713 (% 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.
1714 )))
1715
1716 (((
1717 [[image:1653360231087-571.png||height="401" width="727"]]
1718 )))
1719
1720 (((
1721 (% 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.
1722 )))
1723
1724 (((
1725 (% style="color:#4f81bd" %)**Step2**(%%)**: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1726 )))
1727
1728 (((
1729 (% style="background-color:#dcdcdc" %)123456 (%%) Enter Password to have AT access.
1730 (% style="background-color:#dcdcdc" %)AT+FDR  (%%) Reset Parameters to Factory Default, Keys Reserve
1731 (% style="background-color:#dcdcdc" %)123456  (%%) Enter Password to have AT access.
1732 (% style="background-color:#dcdcdc" %)AT+NJM=0 (%%)Set to ABP mode
1733 (% style="background-color:#dcdcdc" %)AT+ADR=0 (%%)Set the Adaptive Data Rate Off
1734 (% style="background-color:#dcdcdc" %)AT+DR=5 (%%) Set Data Rate (Set AT+DR=3 for 915 band)
1735 (% style="background-color:#dcdcdc" %)AT+TDC=60000  (%%)Set transmit interval to 60 seconds
1736 (% style="background-color:#dcdcdc" %)AT+CHS=868400000 (%%)Set transmit frequency to 868.4Mhz
1737 (% style="background-color:#dcdcdc" %)AT+DADDR=26 01 1A F1(%%) Set Device Address to 26 01 1A F1
1738 (% style="background-color:#dcdcdc" %)ATZ                (%%)Reset MCU
1739 )))
1740
1741 (((
1742 As shown in below:
1743 )))
1744
1745 [[image:1653360498588-932.png||height="485" width="726"]]
1746
1747 == 5.4 Can I see counting event in Serial? ==
1748
1749 (((
1750 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.
1751 )))
1752
1753 (((
1754 = 6. Trouble Shooting =
1755 )))
1756
1757 (((
1758 (((
1759 == 6.1 Downlink doesn’t work, how to solve it? ==
1760 )))
1761 )))
1762
1763 (((
1764 Please see this link for how to debug: [[see how it work>>LoRaWAN_Communication_Debug||anchor="H5.1Howitwork:NO"]]
1765
1766 [[http:~~/~~/wiki1.dragino.com/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/#H5.1Howitwork>>http://wiki1.dragino.com/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/#H5.1Howitwork]]
1767
1768
1769 )))
1770
1771 (((
1772 == 6.2 Have trouble to upload image. ==
1773 )))
1774
1775 (((
1776 See this link for trouble shooting:
1777
1778 [[http:~~/~~/wiki1.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/>>http://wiki1.dragino.com/xwiki/bin/view/Main/Firmware%20Upgrade%20Instruction%20for%20STM32%20base%20products/]]
1779 )))
1780
1781 (((
1782
1783 )))
1784
1785 (((
1786 == 6.3 Why I can’t join TTN in US915 /AU915 bands? ==
1787 )))
1788
1789 (((
1790 It might be about the channels mapping. Please see this link for detail:
1791
1792 [[http:~~/~~/wiki1.dragino.com/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/#H2.NoticeofUS9152FCN4702FAU915Frequencyband>>http://wiki1.dragino.com/xwiki/bin/view/Main/LoRaWAN%20Communication%20Debug/#H2.NoticeofUS9152FCN4702FAU915Frequencyband]]
1793 )))
1794
1795 (((
1796
1797 )))
1798
1799 (((
1800 = 7. Order Info =
1801 )))
1802
1803 (((
1804 (((
1805 (% style="color:#4f81bd" %)**LT-22222-L-XXX:**
1806 )))
1807 )))
1808
1809 (((
1810 (((
1811 (% style="color:#4f81bd" %)**XXX:**
1812 )))
1813 )))
1814
1815 (((
1816 * (((
1817 (% style="color:#4f81bd" %)**EU433**(%%): LT with frequency bands EU433
1818 )))
1819 )))
1820
1821 (((
1822 * (((
1823 (% style="color:#4f81bd" %)**EU868**(%%): LT with frequency bands EU868
1824 )))
1825 )))
1826
1827 (((
1828 * (((
1829 (% style="color:#4f81bd" %)**KR920**(%%): LT with frequency bands KR920
1830 )))
1831 )))
1832
1833 (((
1834 * (((
1835 (% style="color:#4f81bd" %)**CN470**(%%): LT with frequency bands CN470
1836 )))
1837 )))
1838
1839 (((
1840 * (((
1841 (% style="color:#4f81bd" %)**AS923**(%%): LT with frequency bands AS923
1842 )))
1843 )))
1844
1845 (((
1846 * (((
1847 (% style="color:#4f81bd" %)**AU915**(%%): LT with frequency bands AU915
1848 )))
1849 )))
1850
1851 (((
1852 * (((
1853 (% style="color:#4f81bd" %)**US915**(%%): LT with frequency bands US915
1854 )))
1855 )))
1856
1857 (((
1858 * (((
1859 (% style="color:#4f81bd" %)**IN865**(%%): LT with frequency bands IN865
1860 )))
1861 )))
1862
1863 (((
1864 * (((
1865 (% style="color:#4f81bd" %)**CN779**(%%): LT with frequency bands CN779
1866 )))
1867
1868 = 8. Packing Info =
1869 )))
1870
1871 (((
1872 (((
1873 **Package Includes**:
1874 )))
1875 )))
1876
1877 (((
1878 (((
1879 * LT-22222-L I/O Controller x 1
1880 * Stick Antenna for LoRa RF part x 1
1881 * Bracket for controller x1
1882 * Program cable x 1
1883 )))
1884 )))
1885
1886 (((
1887 (((
1888 **Dimension and weight**:
1889 )))
1890 )))
1891
1892 (((
1893 (((
1894 * Device Size: 13.5 x 7 x 3 cm
1895 * Device Weight: 105g
1896 * Package Size / pcs : 14.5 x 8 x 5 cm
1897 * Weight / pcs : 170g
1898 )))
1899 )))
1900
1901 (((
1902 = 9. Support =
1903 )))
1904
1905 * (((
1906 (((
1907 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.
1908 )))
1909 )))
1910 * (((
1911 (((
1912 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
1913 )))
1914 )))
1915
1916 (((
1917 (((
1918 [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
1919 )))
1920
1921 (((
1922 = 10. Reference​​​​​ =
1923
1924 * Product Page:
1925
1926 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]]
1927
1928 * [[Image Download>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]
1929 * [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]
1930 * [[Hardware Source>>url:https://github.com/dragino/Lora/tree/master/LT/LT-33222-L/v1.0]]
1931 )))
1932 )))

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