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Title
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1 -LT-22222-L
1 +LT-22222-L LoRa IO Controller User Manual
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1 -{{box cssClass="floatinginfobox" title="**Contents**"}}
2 -{{toc/}}
3 -{{/box}}
1 +(% style="text-align:center" %)
2 +[[image:image-20220523163353-1.jpeg||height="604" width="500"]]
4 4  
5 -= Paragraph 1 =
4 +**LT-22222-L LoRa IO Controller User Manual **
6 6  
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8 8  
9 -== Sub-paragraph ==
10 10  
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12 12  
13 -== Sub-paragraph ==
9 += 1.Introduction =
14 14  
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11 +== 1.1 What is LT Series I/O Controller ==
16 16  
17 -=== Sub-sub paragraph ===
13 +(((
14 +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.
15 +)))
18 18  
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17 +(((
18 +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.
19 +)))
20 20  
21 +(((
22 +The LT I/O Controllers is aiming to provide a simple plug and play, low cost installation by using LoRaWAN wireless technology.
23 +)))
21 21  
22 -= Paragraph 2 =
25 +(((
26 +The use environment includes:
27 +)))
23 23  
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29 +(((
30 +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.
31 +)))
25 25  
26 -== Sub-paragraph ==
33 +(((
34 +2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
35 +)))
27 27  
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37 +(((
38 +[[image:1653295757274-912.png]]
39 +)))
29 29  
30 -== Sub-paragraph ==
41 +== 1.2  Specifications ==
31 31  
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43 +**Hardware System:**
44 +
45 +* STM32L072CZT6 MCU
46 +* SX1276/78 Wireless Chip
47 +* Power Consumption:
48 +** Idle: 4mA@12v
49 +
50 +*
51 +** 20dB Transmit: 34mA@12v
52 +
53 +**Interface for Model: LT22222-L:**
54 +
55 +* 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
56 +* 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
57 +* 2 x Relay Output (5A@250VAC / 30VDC)
58 +* 2 x 0~~20mA Analog Input (res:0.01mA)
59 +* 2 x 0~~30V Analog Input (res:0.01v)
60 +* Power Input 7~~ 24V DC.
61 +
62 +**LoRa Spec:**
63 +
64 +* Frequency Range:
65 +** Band 1 (HF): 862 ~~ 1020 Mhz
66 +** Band 2 (LF): 410 ~~ 528 Mhz
67 +* 168 dB maximum link budget.
68 +* +20 dBm - 100 mW constant RF output vs.
69 +* +14 dBm high efficiency PA.
70 +* Programmable bit rate up to 300 kbps.
71 +* High sensitivity: down to -148 dBm.
72 +* Bullet-proof front end: IIP3 = -12.5 dBm.
73 +* Excellent blocking immunity.
74 +* Low RX current of 10.3 mA, 200 nA register retention.
75 +* Fully integrated synthesizer with a resolution of 61 Hz.
76 +* FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
77 +* Built-in bit synchronizer for clock recovery.
78 +* Preamble detection.
79 +* 127 dB Dynamic Range RSSI.
80 +* Automatic RF Sense and CAD with ultra-fast AFC.
81 +* Packet engine up to 256 bytes with CRC.
82 +
83 +== 1.3 Features ==
84 +
85 +* LoRaWAN Class A & Class C protocol
86 +* Optional Customized LoRa Protocol
87 +* Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
88 +* AT Commands to change parameters
89 +* Remote configure parameters via LoRa Downlink
90 +* Firmware upgradable via program port
91 +* Counting
92 +
93 +== 1.4  Applications ==
94 +
95 +* Smart Buildings & Home Automation
96 +* Logistics and Supply Chain Management
97 +* Smart Metering
98 +* Smart Agriculture
99 +* Smart Cities
100 +* Smart Factory
101 +
102 +== 1.5 Hardware Variants ==
103 +
104 +(% border="1" style="background-color:#f7faff; width:500px" %)
105 +|(% style="width:103px" %)**Model**|(% style="width:131px" %)**Photo**|(% style="width:329px" %)**Description**
106 +|(% style="width:103px" %)**LT22222-L**|(% style="width:131px" %)[[image:1653296302983-697.png]]|(% style="width:329px" %)(((
107 +* 2 x Digital Input (Bi-direction)
108 +* 2 x Digital Output
109 +* 2 x Relay Output (5A@250VAC / 30VDC)
110 +* 2 x 0~~20mA Analog Input (res:0.01mA)
111 +* 2 x 0~~30V Analog Input (res:0.01v)
112 +* 1 x Counting Port
113 +)))
114 +
115 +
116 +
117 +1.
118 +11. Firmware Change log
119 +
120 +[[**LT Image files**>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]**:**
121 +
122 +http:~/~/www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/
123 +
124 +
125 +**Change log:**
126 +
127 +[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/&file=changelog>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/&file=changelog]]
128 +
129 +
130 +
131 +1. Power ON Device
132 +
133 +
134 +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.
135 +
136 +PWR will on when device is properly powered.
137 +
138 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image004.png]]
139 +
140 +
141 +
142 +
143 +
144 +1. Operation Mode
145 +11. How it works?
146 +
147 +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. 
148 +
149 +
150 +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:#AT_Command]] to set the keys in the devices.
151 +
152 +
153 +1.
154 +11. Example to join LoRaWAN network
155 +
156 +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.
157 +
158 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image005.png]]
159 +
160 +
161 +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:
162 +
163 +**Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
164 +
165 +Each LT is shipped with a sticker with the default device EUI as below:
166 +
167 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image006.png]]
168 +
169 +
170 +
171 +
172 +Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
173 +
174 +Add APP EUI in the application.
175 +
176 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image007.png]]
177 +
178 +Add APP KEY and DEV EUI
179 +
180 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image008.png]]
181 +
182 +**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.
183 +
184 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image009.png]]
185 +
186 +
187 +1.
188 +11. Uplink Payload
189 +
190 +There are five working modes + one interrupt mode on LT for different type application:
191 +
192 +* [[MOD1>>path:#MOD1]]: (default setting): 2 x ACI + 2AVI + DI + DO + RO
193 +* [[MOD2>>path:#MOD2]]: Double DI Counting + DO + RO
194 +* [[MOD3>>path:#MOD3]]: Single DI Counting + 2 x ACI + DO + RO
195 +* [[MOD4>>path:#MOD4]]: Single DI Counting + 1 x Voltage Counting + DO + RO
196 +* [[MOD5>>path:#MOD5]]: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
197 +* [[ADDMOD6>>path:#MOD6]]: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
198 +
199 +
200 +1.
201 +11.
202 +111. AT+MOD=1, 2ACI+2AVI
203 +
204 +The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
205 +
206 +
207 +|Size(bytes)|2|2|2|2|1|1|1
208 +|Value|(((
209 +AVI1
210 +
211 +voltage
212 +)))|(((
213 +AVI2
214 +
215 +voltage
216 +)))|(((
217 +ACI1
218 +
219 +Current
220 +)))|(((
221 +ACI2
222 +
223 +Current
224 +)))|DIDORO*|(((
225 +Reserve
226 +
227 +
228 +)))|MOD
229 +
230 +
231 +**DIDORO** is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
232 +
233 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
234 +|RO1|RO2|DI3|DI2|DI1|DO3|DO2|DO1
235 +
236 +* RO is for relay. ROx=1 : close，ROx=0 always open.
237 +* DI is for digital input. DIx=1: high or float, DIx=0: low.
238 +* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
239 +
240 +Note: DI3 and DO3 bit are not valid for LT-22222-L
241 +
242 +
243 +For example if payload is: 04 AB 04 AC 13 10 13 00 AA FF 01
244 +
245 +The value for the interface is:
246 +
247 +AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
248 +
249 +AVI2 channel voltage is 0x04AC/1000=1.196V
250 +
251 +ACI1 channel current is 0x1310/1000=4.880mA
252 +
253 +ACI2 channel current is 0x1300/1000=4.864mA
254 +
255 +The last byte 0xAA= 10101010(B) means
256 +
257 +* [1] RO1 relay channel is close and the RO1 LED is ON.
258 +* [0] RO2 relay channel is open and RO2 LED is OFF;
259 +
260 +LT33222-L:
261 +
262 +* [1] DI3 channel is high input and DI3 LED is OFF;
263 +* [0] DI2 channel is low input;
264 +* [1] DI1 channel is high input and DI1 LED is OFF;
265 +
266 +LT22222-L:
267 +
268 +* [1] DI2 channel is high input and DI2 LED is ON;
269 +* [0] DI1 channel is low input;
270 +
271 +
272 +* [0] DO3 channel output state
273 +** DO3 is float in case no load between DO3 and V+.;
274 +** DO3 is high in case there is load between DO3 and V+.
275 +** DO3 LED is off in both case
276 +* [1] DO2 channel output is low and DO2 LED is ON.
277 +* [0] DO1 channel output state
278 +** DO1 is float in case no load between DO1 and V+.;
279 +** DO1 is high in case there is load between DO1 and V+.
280 +** DO1 LED is off in both case
281 +
282 +
283 +
284 +1.
285 +11.
286 +111. AT+MOD=2, (Double DI Counting)
287 +
288 +**For LT-33222-L**: this mode the **DI3** is used as a counting pin. Counting on DI3 reflect in COUNT1.
289 +
290 +**For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
291 +
292 +
293 +Total : 11 bytes payload
294 +
295 +|Size(bytes)|4|4|1|1|1
296 +|Value|COUNT1|COUNT2 |DIDORO*|(((
297 +Reserve
298 +
299 +
300 +)))|MOD
301 +
302 +
303 +**DIDORO** is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
304 +
305 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
306 +|RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
307 +
308 +* RO is for relay. ROx=1 : close，ROx=0 always open.
309 +* FIRST: Indicate this is the first packet after join network.
310 +* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
311 +
312 +Note: DO3 bit is not valid for LT-22222-L.
313 +
314 +
315 +To use counting mode, please run:
316 +
317 +AT+MOD=2
318 +
319 +ATZ
320 +
321 +
322 +AT Commands for counting:
323 +
324 +**For LT33222-L:**
325 +
326 +AT+TRIG1=0,100 (set DI3 port to trigger on low level, valid signal is 100ms)
327 +
328 +AT+TRIG1=1,100 (set DI3 port to trigger on high level, valid signal is 100ms )
329 +
330 +AT+SETCNT=1,60   (Set COUNT1 value to 60)
331 +
332 +
333 +**For LT22222-L:**
334 +
335 +AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms)
336 +
337 +AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
338 +
339 +AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms)
340 +
341 +AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms )
342 +
343 +
344 +AT+SETCNT=1,60   (Set COUNT1 value to 60)
345 +
346 +AT+SETCNT=2,60   (Set COUNT2 value to 60)
347 +
348 +
349 +**For both LT22222-L & LT33222-L**:
350 +
351 +AT+CLRCOUNT clear all countings
352 +
353 +AT+COUTIME=60  Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)
354 +
355 +
356 +
357 +1.
358 +11.
359 +111. AT+MOD=3, Single DI Counting + 2 x ACI
360 +
361 +**LT33222-L**: This mode the DI3 is used as a counting pin.
362 +
363 +**LT22222-L**: This mode the DI1 is used as a counting pin.
364 +
365 +
366 +|Size(bytes)|4|2|2|1|1|1
367 +|Value|COUNT1|(((
368 +ACI1
369 +
370 +Current
371 +)))|(((
372 +ACI2
373 +
374 +Current
375 +)))|DIDORO*|Reserve|MOD
376 +
377 +
378 +**DIDORO** is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
379 +
380 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
381 +|RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
382 +
383 +* RO is for relay. ROx=1 : close，ROx=0 always open.
384 +* FIRST: Indicate this is the first packet after join network.
385 +* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
386 +
387 +Note: DO3 is not valid for LT-22222-L.
388 +
389 +
390 +To use counting mode, please run:
391 +
392 +AT+MOD=3
393 +
394 +ATZ
395 +
396 +
397 +Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
398 +
399 +
400 +
401 +
402 +1.
403 +11.
404 +111. AT+MOD=4, Single DI Counting + 1 x Voltage Counting
405 +
406 +**LT33222-L**: This mode the DI3 is used as a counting pin.
407 +
408 +**LT22222-L**: This mode the DI1 is used as a counting pin.
409 +
410 +
411 +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.
412 +
413 +
414 +|Size(bytes)|4|4|1|1|1
415 +|Value|COUNT1|AVI1 Counting|DIDORO*|(((
416 +Reserve
417 +
418 +
419 +)))|MOD
420 +
421 +
422 +**DIDORO** is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
423 +
424 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
425 +|RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
426 +
427 +* RO is for relay. ROx=1 : close，ROx=0 always open.
428 +* FIRST: Indicate this is the first packet after join network.
429 +* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
430 +
431 +Note: DO3 is not valid for LT-22222-L.
432 +
433 +
434 +To use this mode, please run:
435 +
436 +AT+MOD=4
437 +
438 +ATZ
439 +
440 +
441 +
442 +Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
443 +
444 +Plus below command for AVI1 Counting:
445 +
446 +AT+SETCNT=3,60   (set AVI Count to 60)
447 +
448 +AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)
449 +
450 +AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)
451 +
452 +AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)
453 +
454 +
455 +
456 +1.
457 +11.
458 +111. AT+MOD=5, Single DI Counting + 2 x AVI + 1 x ACI
459 +
460 +
461 +**LT33222-L**: This mode the DI3 is used as a counting pin.
462 +
463 +**LT22222-L**: This mode the DI1 is used as a counting pin.
464 +
465 +
466 +|Size(bytes)|2|2|2|2|1|1|1
467 +|Value|(((
468 +AVI1
469 +
470 +voltage
471 +)))|(((
472 +AVI2
473 +
474 +voltage
475 +)))|(((
476 +ACI1
477 +
478 +Current
479 +)))|COUNT1|DIDORO*|(((
480 +Reserve
481 +
482 +
483 +)))|MOD
484 +
485 +
486 +
487 +**DIDORO** is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
488 +
489 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
490 +|RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
491 +
492 +* RO is for relay. ROx=1 : close，ROx=0 always open.
493 +* FIRST: Indicate this is the first packet after join network.
494 +* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
495 +
496 +Note: DO3 is not valid for LT-22222-L.
497 +
498 +
499 +To use this mode, please run:
500 +
501 +AT+MOD=5
502 +
503 +ATZ
504 +
505 +
506 +Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
507 +
508 +
509 +
510 +
511 +
512 +1.
513 +11.
514 +111. AT+ADDMOD=6. (Trigger Mode, Optional)
515 +
516 +
517 +**This mode is an optional mode for trigger purpose. It can run together with other mode.**
518 +
519 +For example, if user has configured below commands:
520 +
521 +* AT+MOD=1   à The normal working mode
522 +* AT+ADDMOD6=1    à Enable trigger
523 +
524 +
525 +LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
526 +
527 +1. Periodically uplink (Base on TDC time). Payload is same as the normal MOD (MOD 1 for above command). This uplink uses LoRaWAN **unconfirmed** data type
528 +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 **CONFIRMED data type.**
529 +
530 +
531 +**AT Command to set Trigger Condition**:
532 +
533 +**Trigger base on voltage**:
534 +
535 +Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
536 +
537 +Example:
538 +
539 +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)
540 +
541 +AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
542 +
543 +
544 +**Trigger base on current**:
545 +
546 +Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
547 +
548 +Example:
549 +
550 +AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
551 +
552 +
553 +**Trigger base on DI status**:
554 +
555 +DI status trigger Flag.
556 +
557 +Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
558 +
559 +Example:
560 +
561 +AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
562 +
563 +
564 +
565 +
566 +
567 +**Downlink Command to set Trigger Condition**
568 +
569 +Type Code: 0xAA. Downlink command same as AT Command [[AT+AVLIM, AT+ACLIM>>path:#AT_Trigger]]
570 +
571 +Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
572 +
573 + AA: Code for this downlink Command:
574 +
575 + xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
576 +
577 + yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
578 +
579 + yy2 yy2: AC1 or AV1 high limit.
580 +
581 + yy3 yy3: AC2 or AV2 low limit.
582 +
583 + Yy4 yy4: AC2 or AV2 high limit.
584 +
585 +
586 +Example1: AA 00 13 88 00 00 00 00 00 00
587 +
588 +Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
589 +
590 +Example2: AA 02 01 00
591 +
592 +Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
593 +
594 +
595 +
596 +
597 +**Trigger Settings Payload Explanation:**
598 +
599 +MOD6 Payload : total 11 bytes payload
600 +
601 +|Size(bytes)|1|1|1|6|1|1
602 +|Value|(((
603 +TRI_A
604 +
605 +FLAG
606 +)))|(((
607 +TRI_A
608 +
609 +Status
610 +)))|(((
611 +TRI_DI
612 +
613 +FLAG+STA
614 +)))|Reserve|Enable/Disable MOD6|(((
615 +MOD
616 +
617 +(6)
618 +)))
619 +
620 +
621 +
622 +**TRI FLAG1** is a combination to show if trigger is set for this part. Totally 1byte as below
623 +
624 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
625 +|(((
626 +AV1_
627 +
628 +LOW
629 +)))|(((
630 +AV1_
631 +
632 +HIGH
633 +)))|(((
634 +AV2_
635 +
636 +LOW
637 +)))|(((
638 +AV2_
639 +
640 +HIGH
641 +)))|(((
642 +AC1_
643 +
644 +LOW
645 +)))|(((
646 +AC1_
647 +
648 +HIGH
649 +)))|(((
650 +AC2_
651 +
652 +LOW
653 +)))|(((
654 +AC2_
655 +
656 +HIGH
657 +)))
658 +
659 +* Each bits shows if the corresponding trigger has been configured.
660 +
661 +Example:
662 +
663 +10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
664 +
665 +
666 +**TRI Status1** is a combination to show which condition is trigger. Totally 1byte as below
667 +
668 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
669 +|(((
670 +AV1_
671 +
672 +LOW
673 +)))|(((
674 +AV1_
675 +
676 +HIGH
677 +)))|(((
678 +AV2_
679 +
680 +LOW
681 +)))|(((
682 +AV2_
683 +
684 +HIGH
685 +)))|(((
686 +AC1_
687 +
688 +LOW
689 +)))|(((
690 +AC1_
691 +
692 +HIGH
693 +)))|(((
694 +AC2_
695 +
696 +LOW
697 +)))|(((
698 +AC2_
699 +
700 +HIGH
701 +)))
702 +
703 +* Each bits shows which status has been trigger on this uplink.
704 +
705 +Example:
706 +
707 +10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
708 +
709 +
710 +
711 +
712 +**TRI_DI FLAG+STA **is a combination to show which condition is trigger. Totally 1byte as below
713 +
714 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
715 +|N/A|N/A|N/A|N/A|DI2_STATUS|DI2_FLAG|DI1_STATUS|DI1_FLAG
716 +
717 +* Each bits shows which status has been trigger on this uplink.
718 +
719 +Example:
720 +
721 +00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
722 +
723 +00000101: Means both DI1 and DI2 trigger are enabled.
724 +
725 +
726 +**Enable/Disable MOD6 **: 0x01: MOD6 is enable. 0x00: MOD6 is disable.
727 +
728 +
729 +Downlink command to poll MOD6 status:
730 +
731 +AB 06
732 +
733 +When device got this command, it will send the MOD6 payload.
734 +
735 +
736 +1.
737 +11.
738 +111. Payload Decoder
739 +
740 +
741 +**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/]]
742 +
743 +
744 +
745 +
746 +
747 +
748 +
749 +1.
750 +11. ​Configure LT via AT or Downlink
751 +
752 +User can configure LT I/O Controller via [[AT Commands >>path:#_​Using_the_AT]]or LoRaWAN Downlink Commands
753 +
754 +There are two kinds of Commands:
755 +
756 +* **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
757 +
758 +* **Sensor Related Commands**: These commands are special designed for LT-22222-L.  User can see these commands below:
759 +
760 +
761 +1.
762 +11.
763 +111. Common Commands:
764 +
765 +
766 +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: http:~/~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands
767 +
768 +
769 +1.
770 +11.
771 +111. Sensor related commands:
772 +
773 +
774 +==== Set Transmit Interval ====
775 +
776 +Set device uplink interval.
777 +
778 +* AT Command:
779 +
780 +AT+TDC=N
781 +
782 +Example: AT+TDC=30000. Means set interval to 30 seconds
783 +
784 +
785 +* Downlink Payload (prefix 0x01):
786 +
787 +0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)
788 +
789 +
790 +==== Set Work Mode (AT+MOD) ====
791 +
792 +Set work mode.
793 +
794 +* AT Command:
795 +
796 +AT+MOD=N 
797 +
798 +Example: AT+MOD=2. Set work mode to Double DI counting mode
799 +
800 +
801 +* Downlink Payload (prefix 0x0A):
802 +
803 +0x0A aa     ~/~/ Same as AT+MOD=aa
804 +
805 +
806 +
807 +==== Poll an uplink ====
808 +
809 +* AT Command:
810 +
811 +There is no AT Command to poll uplink
812 +
813 +
814 +* Downlink Payload (prefix 0x08):
815 +
816 +0x08 FF     ~/~/ Poll an uplink,
817 +
818 +Example: 0x08FF, ask device to send an Uplink
819 +
820 +
821 +==== Enable Trigger Mode ====
822 +
823 +Use of trigger mode, please check [[ADDMOD6>>path:#MOD6]]
824 +
825 +* AT Command:
826 +
827 +AT+ADDMOD6=1 or 0
828 +
829 +1: Enable Trigger Mode
830 +
831 +0: Disable Trigger Mode
832 +
833 +
834 +* Downlink Payload (prefix 0x0A 06):
835 +
836 +0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,
837 +
838 +
839 +==== Poll trigger settings ====
840 +
841 +Poll trigger settings,
842 +
843 +* AT Command:
844 +
845 +There is no AT Command for this feature.
846 +
847 +
848 +* Downlink Payload (prefix 0x AB 06):
849 +
850 +0xAB 06  ~/~/ Poll trigger settings, device will uplink [[trigger settings>>path:#Trigger_Settings]] once receive this command
851 +
852 +
853 +==== Enable / Disable DI1/DI2/DI3 as trigger ====
854 +
855 +Enable Disable DI1/DI2/DI2 as trigger,
856 +
857 +* AT Command:
858 +
859 +Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
860 +
861 +Example:
862 +
863 +AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
864 +
865 +
866 +
867 +* Downlink Payload (prefix 0xAA 02):
868 +
869 +0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb
870 +
871 +
872 +
873 +==== Trigger1 – Set DI1 or DI3 as trigger ====
874 +
875 +Set DI1 or DI3(for LT-33222-L) trigger.
876 +
877 +* AT Command:
878 +
879 +AT+TRIG1=a,b
880 +
881 +a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
882 +
883 +b : delay timing.
884 +
885 +Example:
886 +
887 +AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
888 +
889 +
890 +* Downlink Payload (prefix 0x09 01 ):
891 +
892 +0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)
893 +
894 +
895 +==== Trigger2 – Set DI2 as trigger ====
896 +
897 +Set DI2 trigger.
898 +
899 +* AT Command:
900 +
901 +AT+TRIG2=a,b
902 +
903 +a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
904 +
905 +b : delay timing.
906 +
907 +Example:
908 +
909 +AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
910 +
911 +
912 +* Downlink Payload (prefix 0x09 02 ):
913 +
914 +0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)
915 +
916 +
917 +==== Trigger – Set AC (current) as trigger ====
918 +
919 +Set current trigger , base on AC port. See [[trigger mode>>path:#MOD6]]
920 +
921 +* AT Command:
922 +
923 +AT+ACLIM. See [[trigger mode>>path:#MOD6]]
924 +
925 +
926 +* Downlink Payload (prefix 0xAA 01 ):
927 +
928 +0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>path:#MOD6]]
929 +
930 +
931 +==== Trigger – Set AV (voltage) as trigger ====
932 +
933 +Set current trigger , base on AV port. See [[trigger mode>>path:#MOD6]]
934 +
935 +* AT Command:
936 +
937 +AT+AVLIM. See [[trigger mode>>path:#MOD6]]
938 +
939 +
940 +* Downlink Payload (prefix 0xAA 00 ):
941 +
942 +0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>path:#MOD6]]
943 +
944 +==== Trigger – Set minimum interval ====
945 +
946 +Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
947 +
948 +* AT Command:
949 +
950 +AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.
951 +
952 +
953 +* Downlink Payload (prefix 0xAC ):
954 +
955 +0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
956 +
957 +
958 +==== DO ~-~- Control Digital Output DO1/DO2/DO3 ====
959 +
960 +* AT Command:
961 +
962 +There is no AT Command to control Digital Output
963 +
964 +
965 +* Downlink Payload (prefix 0x02):
966 +
967 +0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output
968 +
969 +If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
970 +
971 +01: Low,  00: High ,  11: No action
972 +
973 +|Downlink Code|DO1|DO2|DO3
974 +|02  01  00  11|Low|High|No Action
975 +|02  00  11  01|High|No Action|Low
976 +|02  11  01  00|No Action|Low|High
977 +
978 +Note: For LT-22222-L, there is no DO3, the last byte can use any value.
979 +
980 +Device will upload a packet if downlink code executes successfully.
981 +
982 +
983 +
984 +
985 +
986 +==== DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
987 +
988 +* AT Command:
989 +
990 +There is no AT Command to control Digital Output
991 +
992 +
993 +* Downlink Payload (prefix 0xA9):
994 +
995 +0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control
996 +
997 +This is to control the digital output time of DO pin. Include four bytes:
998 +
999 +**First Byte:** Type code (0xA9)
1000 +
1001 +**Second Byte**: Inverter Mode
1002 +
1003 +01: DO pins will change back to original state after timeout.
1004 +
1005 +00: DO pins will change to an inverter state after timeout 
1006 +
1007 +
1008 +**Third Byte**: Control Method and Ports status:
1009 +
1010 +|Second Byte|Status
1011 +|0x01|DO1 set to low
1012 +|0x00|DO1 set to high
1013 +|0x11|DO1 NO Action
1014 +
1015 +
1016 +**Fourth Byte**: Control Method and Ports status:
1017 +
1018 +|Second Byte|Status
1019 +|0x01|DO2 set to low
1020 +|0x00|DO2 set to high
1021 +|0x11|DO2 NO Action
1022 +
1023 +
1024 +**Fifth Byte**: Control Method and Ports status:
1025 +
1026 +|Second Byte|Status
1027 +|0x01|DO3 set to low
1028 +|0x00|DO3 set to high
1029 +|0x11|DO3 NO Action
1030 +
1031 +**Sixth and Seventh Byte**:
1032 +
1033 + Latching time. Unit: ms
1034 +
1035 +Device will upload a packet if downlink code executes successfully.
1036 +
1037 +
1038 +
1039 +Example payload:
1040 +
1041 +1. A9 01 01 01 01 07 D0
1042 +
1043 +DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1044 +
1045 +
1046 +1. A9 01 00 01 11 07 D0
1047 +
1048 +DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1049 +
1050 +
1051 +1. A9 00 00 00 00 07 D0
1052 +
1053 +DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1054 +
1055 +
1056 +1. A9 00 11 01 00 07 D0
1057 +
1058 +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
1059 +
1060 +
1061 +
1062 +
1063 +==== Relay ~-~- Control Relay Output RO1/RO2 ====
1064 +
1065 +* AT Command:
1066 +
1067 +There is no AT Command to control Relay Output
1068 +
1069 +
1070 +* Downlink Payload (prefix 0x03):
1071 +
1072 +0x03 aa bb     ~/~/ Set RO1/RO2 output
1073 +
1074 +If payload = 0x030100, it means set RO1 to close and RO2 to open.
1075 +
1076 +01: Close ,  00: Open , 11: No action
1077 +
1078 +|Downlink Code|RO1|RO2
1079 +|03  00  11|Open|No Action
1080 +|03  01  11|Close|No Action
1081 +|03  11  00|No Action|Open
1082 +|03  11  01|No Action|Close
1083 +|03  00  00|Open|Open
1084 +|03  01  01|Close|Close
1085 +|03  01  00|Close|Open
1086 +|03  00  01|Open|Close
1087 +
1088 +Device will upload a packet if downlink code executes successfully.
1089 +
1090 +
1091 +==== Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1092 +
1093 +* AT Command:
1094 +
1095 +There is no AT Command to control Relay Output
1096 +
1097 +
1098 +* Downlink Payload (prefix 0x05):
1099 +
1100 +0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:
1101 +
1102 +This is to control the relay output time of relay. Include four bytes:
1103 +
1104 +**First Byte:** Type code (0x05)
1105 +
1106 +**Second Byte(aa)**: Inverter Mode
1107 +
1108 +01: Relays will change back to original state after timeout.
1109 +
1110 +00: Relays will change to an inverter state after timeout
1111 +
1112 +
1113 +**Third Byte(bb)**: Control Method and Ports status:
1114 +
1115 +|Value|Status
1116 +|0x11|RO1 and RO2 to NO
1117 +|0x10|RO2 to NO, RO1 to NC
1118 +|0x01|RO2 to NC, RO1 to NO
1119 +|0x00|RO1 and RO2 to NC.
1120 +|0x20|RO1 No Action, RO2 to NC
1121 +|0x21|RO1 No Action, RO2 to NO
1122 +|0x02|RO1 to NC, RO2 No Action
1123 +|0x12|RO1 to NO, RO2 No Action
1124 +
1125 +
1126 +**Fourth / Fifth Bytes (cc)**: Latching time. Unit: ms
1127 +
1128 +Device will upload a packet if downlink code executes successfully.
1129 +
1130 +
1131 +
1132 +**Example payload:**
1133 +
1134 +1. 05 01 11 07 D0
1135 +
1136 +Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1137 +
1138 +
1139 +1. 05 01 10 07 D0
1140 +
1141 +Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1142 +
1143 +
1144 +1. 05 00 01 07 D0
1145 +
1146 +Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1147 +
1148 +
1149 +1. 05 00 00 07 D0
1150 +
1151 +Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1152 +
1153 +
1154 +
1155 +
1156 +
1157 +
1158 +==== Counting ~-~- Voltage threshold counting ====
1159 +
1160 +When voltage exceed the threshold, count. Feature see [[MOD4>>path:#MOD4]]
1161 +
1162 +* AT Command:
1163 +
1164 +AT+VOLMAX    ~/~/ See [[MOD4>>path:#MOD4]]
1165 +
1166 +
1167 +* Downlink Payload (prefix 0xA5):
1168 +
1169 +0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc
1170 +
1171 +
1172 +==== Counting ~-~- Pre-configure the Count Number ====
1173 +
1174 +* AT Command:
1175 +
1176 +AT+SETCNT=aa,(bb cc dd ee)
1177 +
1178 +aa: 1: Set count1,
1179 +
1180 +2: Set count2,
1181 +
1182 +3: Set AV1 count
1183 +
1184 +Bb cc dd ee: number to be set
1185 +
1186 +
1187 +* Downlink Payload (prefix 0xA8):
1188 +
1189 +0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1190 +
1191 +
1192 +
1193 +
1194 +
1195 +==== Counting ~-~- Clear Counting ====
1196 +
1197 +Clear counting for counting mode
1198 +
1199 +* AT Command:
1200 +
1201 +AT+CLRCOUNT ~/~/ clear all counting
1202 +
1203 +
1204 +* Downlink Payload (prefix 0xA6):
1205 +
1206 +0x A6 01     ~/~/ clear all counting,
1207 +
1208 +
1209 +
1210 +
1211 +==== Counting ~-~- Change counting mode save time ====
1212 +
1213 +* AT Command:
1214 +
1215 +AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)
1216 +
1217 +
1218 +* Downlink Payload (prefix 0xA7):
1219 +
1220 +0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,
1221 +
1222 +range: aa bb cc:0 to 16777215,  (unit:second)
1223 +
1224 +
1225 +
1226 +
1227 +1.
1228 +11. Integrate with Mydevice
1229 +
1230 +
1231 +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:
1232 +
1233 +
1234 +Step 1: Be sure that your device is programmed and properly connected to the network at this time.
1235 +
1236 +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:
1237 +
1238 +
1239 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image010.png]]
1240 +
1241 +
1242 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image011.png]]
1243 +
1244 +
1245 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image012.png]]
1246 +
1247 +
1248 +
1249 +Step 3: Create an account or log in Mydevices.
1250 +
1251 +Step 4: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.
1252 +
1253 +Search under The things network
1254 +
1255 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image013.png]]
1256 +
1257 +
1258 +After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1259 +
1260 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image014.png]]
1261 +
1262 +
1263 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image015.png]]
1264 +
1265 +
1266 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image016.png]]
1267 +
1268 +
1269 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image017.png]]
1270 +
1271 +
1272 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image018.png]]
1273 +
1274 +
1275 +1.
1276 +11. Interface Detail
1277 +111. Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active )
1278 +
1279 +Support NPN Type sensor
1280 +
1281 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image019.png]]
1282 +
1283 +
1284 +
1285 +1.
1286 +11.
1287 +111. Digital Input Port: DI1/DI2 ( For LT-22222-L)
1288 +
1289 +The DI port of LT-22222-L can support NPN or PNP output sensor.
1290 +
1291 +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
1292 +
1293 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image020.png]]
1294 +
1295 +When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1296 +
1297 +
1298 +**Example1**: Connect to a Low active sensor.
1299 +
1300 +This type of sensor will output a low signal GND when active.
1301 +
1302 +* Connect sensor’s output to DI1-
1303 +* Connect sensor’s VCC to DI1+.
1304 +
1305 +So when sensor active, the current between NEC2501 pin1 and pin2 is:
1306 +
1307 + //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1308 +
1309 +If DI1+ = 12v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 12mA , So the LT-22222-L will be able to detect this active signal.
1310 +
1311 +
1312 +**Example2**: Connect to a High active sensor.
1313 +
1314 +This type of sensor will output a high signal (example 24v) when active.
1315 +
1316 +* Connect sensor’s output to DI1+
1317 +* Connect sensor’s GND DI1-.
1318 +
1319 +So when sensor active, the current between NEC2501 pin1 and pin2 is:
1320 +
1321 + //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1322 +
1323 +If DI1+ = 24v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 24mA , So the LT-22222-L will be able to detect this high active signal.
1324 +
1325 +
1326 +**Example3**: Connect to a 220v high active sensor.公司测试一下
1327 +
1328 +Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler 
1329 +
1330 +* Connect sensor’s output to DI1+ with a serial 50K resistor
1331 +* Connect sensor’s GND DI1-.
1332 +
1333 +So when sensor active, the current between NEC2501 pin1 and pin2 is:
1334 +
1335 + //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 51K.
1336 +
1337 +If sensor output is 220v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 4.3mA , So the LT-22222-L will be able to detect this high active signal safely.
1338 +
1339 +
1340 +1.
1341 +11.
1342 +111. Digital Output Port: DO1/DO2 /DO3
1343 +
1344 +NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1345 +
1346 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
1347 +
1348 +
1349 +
1350 +
1351 +1.
1352 +11.
1353 +111. Analog Input Interface
1354 +
1355 +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:
1356 +
1357 +AC2 = (IN2 voltage )/12
1358 +
1359 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
1360 +
1361 +
1362 +
1363 +Example to connect a 4~~20mA sensor
1364 +
1365 +We take the wind speed sensor as an example for reference only.
1366 +
1367 +Specifications of the wind speed sensor:
1368 +
1369 +Red:12~~24v
1370 +
1371 +Yellow:4~~20mA
1372 +
1373 +Black:GND
1374 +
1375 +
1376 +Connection diagram:
1377 +
1378 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.jpg]]
1379 +
1380 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
1381 +
1382 +
1383 +
1384 +1.
1385 +11.
1386 +111. Relay Output
1387 +
1388 +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:
1389 +
1390 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
1391 +
1392 +
1393 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
1394 +
1395 +
1396 +
1397 +
1398 +
1399 +1.
1400 +11. LEDs Indicators
1401 +
1402 +
1403 +|**LEDs**|**Feature**
1404 +|**PWR**|Always on if there is power
1405 +|**SYS**|After device is powered on, the SYS will **fast blink in GREEN** for 5 times, means RS485-LN start to join LoRaWAN network. If join success, SYS will be **on GREEN for 5 seconds. **SYS will **blink Blue** on every upload and **blink Green** once receive a downlink message.
1406 +|**TX**|(((
1407 +Device boot: TX blinks 5 times.
1408 +
1409 +Successful join network: TX ON for 5 seconds.
1410 +
1411 +Transmit a LoRa packet: TX blinks once
1412 +)))
1413 +|**RX**|RX blinks once when receive a packet.
1414 +|**DO1**|
1415 +|**DO2**|
1416 +|**DO3**|
1417 +|**DI2**|(((
1418 +For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1419 +
1420 +For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1421 +)))
1422 +|**DI2**|(((
1423 +For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1424 +
1425 +For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1426 +)))
1427 +|**DI3**|For LT-33222-L ONLY: ON when DI3 is low, LOW when DI3 is high
1428 +|**DI2**|(((
1429 +For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1430 +
1431 +For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1432 +)))
1433 +|**RO1**|
1434 +|**RO2**|
1435 +
1436 +
1437 +
1438 +
1439 +1. Use AT Command
1440 +11. Access AT Command
1441 +
1442 +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.
1443 +
1444 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1445 +
1446 +
1447 +In PC, User needs to set **serial tool**(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to **9600** to access to access serial console for LT. The AT commands are disable by default and need to enter password (default:**123456**) to active it. As shown below:
1448 +
1449 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]
1450 +
1451 +
1452 +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/]]
1453 +
1454 +AT+<CMD>?        : Help on <CMD>
1455 +
1456 +AT+<CMD>         : Run <CMD>
1457 +
1458 +AT+<CMD>=<value> : Set the value
1459 +
1460 +AT+<CMD>=?       : Get the value
1461 +
1462 +ATZ: Trig a reset of the MCU
1463 +
1464 +AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1465 +
1466 +AT+DEUI: Get or Set the Device EUI
1467 +
1468 +AT+DADDR: Get or Set the Device Address
1469 +
1470 +AT+APPKEY: Get or Set the Application Key
1471 +
1472 +AT+NWKSKEY: Get or Set the Network Session Key
1473 +
1474 +AT+APPSKEY: Get or Set the Application Session Key
1475 +
1476 +AT+APPEUI: Get or Set the Application EUI
1477 +
1478 +AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1479 +
1480 +AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1481 +
1482 +AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1483 +
1484 +AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1485 +
1486 +AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1487 +
1488 +AT+RX2FQ: Get or Set the Rx2 window frequency
1489 +
1490 +AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1491 +
1492 +AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1493 +
1494 +AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1495 +
1496 +AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1497 +
1498 +AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1499 +
1500 +AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1501 +
1502 +AT+NWKID: Get or Set the Network ID
1503 +
1504 +AT+FCU: Get or Set the Frame Counter Uplink
1505 +
1506 +AT+FCD: Get or Set the Frame Counter Downlink
1507 +
1508 +AT+CLASS: Get or Set the Device Class
1509 +
1510 +AT+JOIN: Join network
1511 +
1512 +AT+NJS: Get OTAA Join Status
1513 +
1514 +AT+SENDB: Send hexadecimal data along with the application port
1515 +
1516 +AT+SEND: Send text data along with the application port
1517 +
1518 +AT+RECVB: Print last received data in binary format (with hexadecimal values)
1519 +
1520 +AT+RECV: Print last received data in raw format
1521 +
1522 +AT+VER: Get current image version and Frequency Band
1523 +
1524 +AT+CFM: Get or Set the confirmation mode (0-1)
1525 +
1526 +AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1527 +
1528 +AT+SNR: Get the SNR of the last received packet
1529 +
1530 +AT+RSSI: Get the RSSI of the last received packet
1531 +
1532 +AT+TDC: Get or set the application data transmission interval in ms
1533 +
1534 +AT+PORT: Get or set the application port
1535 +
1536 +AT+DISAT: Disable AT commands
1537 +
1538 +AT+PWORD: Set password, max 9 digits
1539 +
1540 +AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1541 +
1542 +AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1543 +
1544 +AT+CFG: Print all settings
1545 +
1546 +
1547 +
1548 +1.
1549 +11. Common AT Command Sequence
1550 +111. Multi-channel ABP mode (Use with SX1301/LG308)
1551 +
1552 +If device has not joined network yet:
1553 +
1554 +123456
1555 +
1556 +AT+FDR
1557 +
1558 +123456
1559 +
1560 +AT+NJM=0
1561 +
1562 +ATZ
1563 +
1564 +
1565 +If device already joined network:
1566 +
1567 +AT+NJM=0
1568 +
1569 +ATZ
1570 +
1571 +1.
1572 +11.
1573 +111. Single-channel ABP mode (Use with LG01/LG02)
1574 +
1575 +123456   Enter Password to have AT access.
1576 +
1577 +AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1578 +
1579 +123456   Enter Password to have AT access.
1580 +
1581 +AT+CLASS=C Set to work in CLASS C
1582 +
1583 +AT+NJM=0 Set to ABP mode
1584 +
1585 +AT+ADR=0 Set the Adaptive Data Rate Off
1586 +
1587 +AT+DR=5  Set Data Rate
1588 +
1589 +AT+TDC=60000  Set transmit interval to 60 seconds
1590 +
1591 +AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1592 +
1593 +AT+RX2FQ=868400000 Set RX2Frequency to 868.4Mhz (according to the result from server)
1594 +
1595 +AT+RX2DR=5  Set RX2DR to match the downlink DR from server. see below
1596 +
1597 +AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
1598 +
1599 +ATZ          Reset MCU
1600 +
1601 +**Note:**
1602 +
1603 +1. Make sure the device is set to ABP mode in the IoT Server.
1604 +1. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1605 +1. 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.
1606 +1. 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
1607 +
1608 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image031.png]]
1609 +
1610 +
1611 +1.
1612 +11.
1613 +111. Change to Class A
1614 +
1615 +
1616 +If sensor JOINED
1617 +
1618 +AT+CLASS=A
1619 +
1620 +ATZ
1621 +
1622 +
1623 +
1624 +
1625 +
1626 +1. FAQ
1627 +
1628 +
1629 +1.
1630 +11. How to upgrade the image?
1631 +
1632 +The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1633 +
1634 +* Support new features
1635 +* For bug fix
1636 +* Change LoRaWAN bands.
1637 +
1638 +
1639 +Below shows the hardware connection for how to upload an image to the LT:
1640 +
1641 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1642 +
1643 +
1644 +**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]].
1645 +
1646 +**Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1647 +
1648 +**Step3: **Open flashloader; choose the correct COM port to update.
1649 +
1650 +**For LT-33222-L**:
1651 +
1652 +Hold down the PRO button and then momentarily press the RST reset button and the **DO2 led** will change from OFF to ON. When **DO2 LED** is on, it means the device is in download mode.
1653 +
1654 +**For LT-22222-L**:
1655 +
1656 +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.
1657 +
1658 +
1659 +
1660 +|(((
1661 +Board detected
1662 +)))
1663 +
1664 +|(((
1665 +
1666 +)))
1667 +
1668 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image032.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image033.png]]
1669 +
1670 +
1671 +
1672 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image034.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image035.png]]
1673 +
1674 +
1675 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image036.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image037.png]]
1676 +
1677 +
1678 +**Notice**: In case user has lost the program cable. User can hand made one from a 3.5mm cable. The pin mapping is:
1679 +
1680 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image038.png]]
1681 +
1682 +
1683 +1.
1684 +11. How to change the LoRa Frequency Bands/Region?
1685 +
1686 +User can follow the introduction for [[how to upgrade image>>path:#upgrade_image]]. When download the images, choose the required image file for download.
1687 +
1688 +
1689 +1.
1690 +11. How to set up LT to work with Single Channel Gateway such as LG01/LG02?
1691 +
1692 +In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1693 +
1694 +Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1695 +
1696 +
1697 +**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.
1698 +
1699 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image039.png]]
1700 +
1701 +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.
1702 +
1703 +
1704 +**Step2: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1705 +
1706 +123456   Enter Password to have AT access.
1707 +
1708 +AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1709 +
1710 +123456   Enter Password to have AT access.
1711 +
1712 +AT+NJM=0 Set to ABP mode
1713 +
1714 +AT+ADR=0 Set the Adaptive Data Rate Off
1715 +
1716 +AT+DR=5  Set Data Rate (Set AT+DR=3 for 915 band)
1717 +
1718 +AT+TDC=60000  Set transmit interval to 60 seconds
1719 +
1720 +AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1721 +
1722 +AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1
1723 +
1724 +ATZ                Reset MCU
1725 +
1726 +As shown in below:
1727 +
1728 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image040.png]]
1729 +
1730 +
1731 +
1732 +1.
1733 +11. Can I see counting event in Serial?
1734 +
1735 +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.
1736 +
1737 +
1738 +
1739 +
1740 +1. Trouble Shooting     
1741 +11. Downlink doesn’t work, how to solve it?
1742 +
1743 +Please see this link for how to debug:
1744 +
1745 +[[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]]
1746 +
1747 +
1748 +1.
1749 +11. Have trouble to upload image.
1750 +
1751 +See this link for trouble shooting:
1752 +
1753 +[[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]]
1754 +
1755 +
1756 +1.
1757 +11. Why I can’t join TTN in US915 /AU915 bands?
1758 +
1759 +It might be about the channels mapping. Please see this link for detail:
1760 +
1761 +[[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]]
1762 +
1763 +
1764 +
1765 +
1766 +1. Order Info
1767 +
1768 +
1769 +**For LT-33222-L-XXX or LT-22222-L-XXX:**
1770 +
1771 +**XXX:**
1772 +
1773 +* **EU433**: LT with frequency bands EU433
1774 +* **EU868**: LT with frequency bands EU868
1775 +* **KR920**: LT with frequency bands KR920
1776 +* **CN470**: LT with frequency bands CN470
1777 +* **AS923**: LT with frequency bands AS923
1778 +* **AU915**: LT with frequency bands AU915
1779 +* **US915**: LT with frequency bands US915
1780 +* **IN865**: LT with frequency bands IN865
1781 +* **CN779**: LT with frequency bands CN779
1782 +
1783 +
1784 +1. Packing Info
1785 +
1786 +**Package Includes**:
1787 +
1788 +* LT I/O Controller x 1
1789 +* Stick Antenna for LoRa RF part x 1
1790 +* Bracket for controller x1
1791 +* Program cable x 1
1792 +
1793 +
1794 +**Dimension and weight**:
1795 +
1796 +* Device Size: 13.5 x 7 x 3 cm
1797 +* Device Weight: 105g
1798 +* Package Size / pcs : 14.5 x 8 x 5 cm
1799 +* Weight / pcs : 170g
1800 +
1801 +
1802 +1. Support
1803 +
1804 +* 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.
1805 +* 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
1806 +
1807 +[[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]
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