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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 +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.
18 18  
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15 +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.
20 20  
17 +The LT I/O Controllers is aiming to provide a simple plug and play, low cost installation by using LoRaWAN wireless technology.
21 21  
22 -= Paragraph 2 =
19 +The use environment includes:
23 23  
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21 +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.
25 25  
26 -== Sub-paragraph ==
23 +2) User can set up a LoRaWAN gateway locally and configure the controller to connect to the gateway via wireless.
27 27  
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29 29  
30 -== Sub-paragraph ==
26 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image001.png]]
31 31  
32 -Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
28 +
29 +
30 +
31 +1.
32 +11. Specifications
33 +
34 +**Hardware System:**
35 +
36 +* STM32L072CZT6 MCU
37 +* SX1276/78 Wireless Chip
38 +* Power Consumption:
39 +** Idle: 4mA@12v
40 +
41 +*
42 +** 20dB Transmit: 34mA@12v
43 +
44 +
45 +**Interface for Model: LT33222-L:**
46 +
47 +* 3 x Digital Input ( Detect Low signal , Max, 6V)
48 +* 3 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
49 +* 2 x Relay Output (5A@250VAC / 30VDC)
50 +* 2 x 0~~20mA Analog Input (res:0.01mA)
51 +* 2 x 0~~30V Analog Input (res:0.01v)
52 +* Power Input 7~~ 24V DC.
53 +*
54 +
55 +**Interface for Model: LT22222-L:**
56 +
57 +* 2 x Digital dual direction Input (Detect High/Low signal, Max: 50v, or 220v with optional external resistor)
58 +* 2 x Digital Output (NPN output. Max pull up voltage 36V,450mA)
59 +* 2 x Relay Output (5A@250VAC / 30VDC)
60 +* 2 x 0~~20mA Analog Input (res:0.01mA)
61 +* 2 x 0~~30V Analog Input (res:0.01v)
62 +* Power Input 7~~ 24V DC.
63 +
64 +
65 +**LoRa Spec:**
66 +
67 +* Frequency Range:
68 +** Band 1 (HF): 862 ~~ 1020 Mhz
69 +** Band 2 (LF): 410 ~~ 528 Mhz
70 +* 168 dB maximum link budget.
71 +* +20 dBm - 100 mW constant RF output vs.
72 +* +14 dBm high efficiency PA.
73 +* Programmable bit rate up to 300 kbps.
74 +* High sensitivity: down to -148 dBm.
75 +* Bullet-proof front end: IIP3 = -12.5 dBm.
76 +* Excellent blocking immunity.
77 +* Low RX current of 10.3 mA, 200 nA register retention.
78 +* Fully integrated synthesizer with a resolution of 61 Hz.
79 +* FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
80 +* Built-in bit synchronizer for clock recovery.
81 +* Preamble detection.
82 +* 127 dB Dynamic Range RSSI.
83 +* Automatic RF Sense and CAD with ultra-fast AFC.
84 +* Packet engine up to 256 bytes with CRC.
85 +
86 +
87 +*
88 +*1. Features
89 +* LoRaWAN Class A & Class C protocol
90 +* Optional Customized LoRa Protocol
91 +* Frequency Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/RU864/IN865
92 +* AT Commands to change parameters
93 +* Remote configure parameters via LoRa Downlink
94 +* Firmware upgradable via program port
95 +* Counting
96 +
97 +
98 +
99 +*
100 +*1. Applications
101 +* Smart Buildings & Home Automation
102 +* Logistics and Supply Chain Management
103 +* Smart Metering
104 +* Smart Agriculture
105 +* Smart Cities
106 +* Smart Factory
107 +
108 +
109 +
110 +
111 +1.
112 +11. Hardware Variants
113 +
114 +
115 +|**Model**|**Photo**|**Description**
116 +|**LT33222-L**|[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image002.jpg]]|(((
117 +* 3 x Digital Input
118 +* 3 x Digital Output
119 +* 2 x Relay Output (5A@250VAC / 30VDC)
120 +* 2 x 0~~20mA Analog Input (res:0.01mA)
121 +* 2 x 0~~30V Analog Input (res:0.01v)
122 +* 1 x Counting Port
123 +)))
124 +
125 +
126 +|**Model**|**Photo**|**Description**
127 +|**LT22222-L**|[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image003.jpg]]|(((
128 +* 2 x Digital Input (Bi-direction)
129 +* 2 x Digital Output
130 +* 2 x Relay Output (5A@250VAC / 30VDC)
131 +* 2 x 0~~20mA Analog Input (res:0.01mA)
132 +* 2 x 0~~30V Analog Input (res:0.01v)
133 +* 1 x Counting Port
134 +)))
135 +
136 +
137 +
138 +1.
139 +11. Firmware Change log
140 +
141 +[[**LT Image files**>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]]**:**
142 +
143 +http:~/~/www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/
144 +
145 +
146 +**Change log:**
147 +
148 +[[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]]
149 +
150 +
151 +
152 +1. Power ON Device
153 +
154 +
155 +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.
156 +
157 +PWR will on when device is properly powered.
158 +
159 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image004.png]]
160 +
161 +
162 +
163 +
164 +
165 +1. Operation Mode
166 +11. How it works?
167 +
168 +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. 
169 +
170 +
171 +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.
172 +
173 +
174 +1.
175 +11. Example to join LoRaWAN network
176 +
177 +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.
178 +
179 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image005.png]]
180 +
181 +
182 +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:
183 +
184 +**Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.
185 +
186 +Each LT is shipped with a sticker with the default device EUI as below:
187 +
188 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image006.png]]
189 +
190 +
191 +
192 +
193 +Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:
194 +
195 +Add APP EUI in the application.
196 +
197 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image007.png]]
198 +
199 +Add APP KEY and DEV EUI
200 +
201 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image008.png]]
202 +
203 +**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.
204 +
205 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image009.png]]
206 +
207 +
208 +1.
209 +11. Uplink Payload
210 +
211 +There are five working modes + one interrupt mode on LT for different type application:
212 +
213 +* [[MOD1>>path:#MOD1]]: (default setting): 2 x ACI + 2AVI + DI + DO + RO
214 +* [[MOD2>>path:#MOD2]]: Double DI Counting + DO + RO
215 +* [[MOD3>>path:#MOD3]]: Single DI Counting + 2 x ACI + DO + RO
216 +* [[MOD4>>path:#MOD4]]: Single DI Counting + 1 x Voltage Counting + DO + RO
217 +* [[MOD5>>path:#MOD5]]: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
218 +* [[ADDMOD6>>path:#MOD6]]: Trigger Mode, Optional, used together with MOD1 ~~ MOD5
219 +
220 +
221 +1.
222 +11.
223 +111. AT+MOD=1, 2ACI+2AVI
224 +
225 +The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.
226 +
227 +
228 +|Size(bytes)|2|2|2|2|1|1|1
229 +|Value|(((
230 +AVI1
231 +
232 +voltage
233 +)))|(((
234 +AVI2
235 +
236 +voltage
237 +)))|(((
238 +ACI1
239 +
240 +Current
241 +)))|(((
242 +ACI2
243 +
244 +Current
245 +)))|DIDORO*|(((
246 +Reserve
247 +
248 +
249 +)))|MOD
250 +
251 +
252 +**DIDORO** is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
253 +
254 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
255 +|RO1|RO2|DI3|DI2|DI1|DO3|DO2|DO1
256 +
257 +* RO is for relay. ROx=1 : close，ROx=0 always open.
258 +* DI is for digital input. DIx=1: high or float, DIx=0: low.
259 +* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
260 +
261 +Note: DI3 and DO3 bit are not valid for LT-22222-L
262 +
263 +
264 +For example if payload is: 04 AB 04 AC 13 10 13 00 AA FF 01
265 +
266 +The value for the interface is:
267 +
268 +AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
269 +
270 +AVI2 channel voltage is 0x04AC/1000=1.196V
271 +
272 +ACI1 channel current is 0x1310/1000=4.880mA
273 +
274 +ACI2 channel current is 0x1300/1000=4.864mA
275 +
276 +The last byte 0xAA= 10101010(B) means
277 +
278 +* [1] RO1 relay channel is close and the RO1 LED is ON.
279 +* [0] RO2 relay channel is open and RO2 LED is OFF;
280 +
281 +LT33222-L:
282 +
283 +* [1] DI3 channel is high input and DI3 LED is OFF;
284 +* [0] DI2 channel is low input;
285 +* [1] DI1 channel is high input and DI1 LED is OFF;
286 +
287 +LT22222-L:
288 +
289 +* [1] DI2 channel is high input and DI2 LED is ON;
290 +* [0] DI1 channel is low input;
291 +
292 +
293 +* [0] DO3 channel output state
294 +** DO3 is float in case no load between DO3 and V+.;
295 +** DO3 is high in case there is load between DO3 and V+.
296 +** DO3 LED is off in both case
297 +* [1] DO2 channel output is low and DO2 LED is ON.
298 +* [0] DO1 channel output state
299 +** DO1 is float in case no load between DO1 and V+.;
300 +** DO1 is high in case there is load between DO1 and V+.
301 +** DO1 LED is off in both case
302 +
303 +
304 +
305 +1.
306 +11.
307 +111. AT+MOD=2, (Double DI Counting)
308 +
309 +**For LT-33222-L**: this mode the **DI3** is used as a counting pin. Counting on DI3 reflect in COUNT1.
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 +|Size(bytes)|4|4|1|1|1
317 +|Value|COUNT1|COUNT2 |DIDORO*|(((
318 +Reserve
319 +
320 +
321 +)))|MOD
322 +
323 +
324 +**DIDORO** is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
325 +
326 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
327 +|RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
328 +
329 +* RO is for relay. ROx=1 : close，ROx=0 always open.
330 +* FIRST: Indicate this is the first packet after join network.
331 +* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
332 +
333 +Note: DO3 bit is not valid for LT-22222-L.
334 +
335 +
336 +To use counting mode, please run:
337 +
338 +AT+MOD=2
339 +
340 +ATZ
341 +
342 +
343 +AT Commands for counting:
344 +
345 +**For LT33222-L:**
346 +
347 +AT+TRIG1=0,100 (set DI3 port to trigger on low level, valid signal is 100ms)
348 +
349 +AT+TRIG1=1,100 (set DI3 port to trigger on high level, valid signal is 100ms )
350 +
351 +AT+SETCNT=1,60   (Set COUNT1 value to 60)
352 +
353 +
354 +**For LT22222-L:**
355 +
356 +AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms)
357 +
358 +AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
359 +
360 +AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms)
361 +
362 +AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms )
363 +
364 +
365 +AT+SETCNT=1,60   (Set COUNT1 value to 60)
366 +
367 +AT+SETCNT=2,60   (Set COUNT2 value to 60)
368 +
369 +
370 +**For both LT22222-L & LT33222-L**:
371 +
372 +AT+CLRCOUNT clear all countings
373 +
374 +AT+COUTIME=60  Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)
375 +
376 +
377 +
378 +1.
379 +11.
380 +111. AT+MOD=3, Single DI Counting + 2 x ACI
381 +
382 +**LT33222-L**: This mode the DI3 is used as a counting pin.
383 +
384 +**LT22222-L**: This mode the DI1 is used as a counting pin.
385 +
386 +
387 +|Size(bytes)|4|2|2|1|1|1
388 +|Value|COUNT1|(((
389 +ACI1
390 +
391 +Current
392 +)))|(((
393 +ACI2
394 +
395 +Current
396 +)))|DIDORO*|Reserve|MOD
397 +
398 +
399 +**DIDORO** is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
400 +
401 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
402 +|RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
403 +
404 +* RO is for relay. ROx=1 : close，ROx=0 always open.
405 +* FIRST: Indicate this is the first packet after join network.
406 +* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
407 +
408 +Note: DO3 is not valid for LT-22222-L.
409 +
410 +
411 +To use counting mode, please run:
412 +
413 +AT+MOD=3
414 +
415 +ATZ
416 +
417 +
418 +Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
419 +
420 +
421 +
422 +
423 +1.
424 +11.
425 +111. AT+MOD=4, Single DI Counting + 1 x Voltage Counting
426 +
427 +**LT33222-L**: This mode the DI3 is used as a counting pin.
428 +
429 +**LT22222-L**: This mode the DI1 is used as a counting pin.
430 +
431 +
432 +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.
433 +
434 +
435 +|Size(bytes)|4|4|1|1|1
436 +|Value|COUNT1|AVI1 Counting|DIDORO*|(((
437 +Reserve
438 +
439 +
440 +)))|MOD
441 +
442 +
443 +**DIDORO** is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
444 +
445 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
446 +|RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
447 +
448 +* RO is for relay. ROx=1 : close，ROx=0 always open.
449 +* FIRST: Indicate this is the first packet after join network.
450 +* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
451 +
452 +Note: DO3 is not valid for LT-22222-L.
453 +
454 +
455 +To use this mode, please run:
456 +
457 +AT+MOD=4
458 +
459 +ATZ
460 +
461 +
462 +
463 +Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
464 +
465 +Plus below command for AVI1 Counting:
466 +
467 +AT+SETCNT=3,60   (set AVI Count to 60)
468 +
469 +AT+VOLMAX=20000   (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)
470 +
471 +AT+VOLMAX=20000,0   (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)
472 +
473 +AT+VOLMAX=20000,1   (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)
474 +
475 +
476 +
477 +1.
478 +11.
479 +111. AT+MOD=5, Single DI Counting + 2 x AVI + 1 x ACI
480 +
481 +
482 +**LT33222-L**: This mode the DI3 is used as a counting pin.
483 +
484 +**LT22222-L**: This mode the DI1 is used as a counting pin.
485 +
486 +
487 +|Size(bytes)|2|2|2|2|1|1|1
488 +|Value|(((
489 +AVI1
490 +
491 +voltage
492 +)))|(((
493 +AVI2
494 +
495 +voltage
496 +)))|(((
497 +ACI1
498 +
499 +Current
500 +)))|COUNT1|DIDORO*|(((
501 +Reserve
502 +
503 +
504 +)))|MOD
505 +
506 +
507 +
508 +**DIDORO** is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below
509 +
510 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
511 +|RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1
512 +
513 +* RO is for relay. ROx=1 : close，ROx=0 always open.
514 +* FIRST: Indicate this is the first packet after join network.
515 +* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
516 +
517 +Note: DO3 is not valid for LT-22222-L.
518 +
519 +
520 +To use this mode, please run:
521 +
522 +AT+MOD=5
523 +
524 +ATZ
525 +
526 +
527 +Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].
528 +
529 +
530 +
531 +
532 +
533 +1.
534 +11.
535 +111. AT+ADDMOD=6. (Trigger Mode, Optional)
536 +
537 +
538 +**This mode is an optional mode for trigger purpose. It can run together with other mode.**
539 +
540 +For example, if user has configured below commands:
541 +
542 +* AT+MOD=1   à The normal working mode
543 +* AT+ADDMOD6=1    à Enable trigger
544 +
545 +
546 +LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:
547 +
548 +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
549 +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.**
550 +
551 +
552 +**AT Command to set Trigger Condition**:
553 +
554 +**Trigger base on voltage**:
555 +
556 +Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>
557 +
558 +Example:
559 +
560 +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)
561 +
562 +AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
563 +
564 +
565 +**Trigger base on current**:
566 +
567 +Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>
568 +
569 +Example:
570 +
571 +AT+ACLIM=10000,15000,0,0   (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)
572 +
573 +
574 +**Trigger base on DI status**:
575 +
576 +DI status trigger Flag.
577 +
578 +Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
579 +
580 +Example:
581 +
582 +AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
583 +
584 +
585 +
586 +
587 +
588 +**Downlink Command to set Trigger Condition**
589 +
590 +Type Code: 0xAA. Downlink command same as AT Command [[AT+AVLIM, AT+ACLIM>>path:#AT_Trigger]]
591 +
592 +Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4
593 +
594 + AA: Code for this downlink Command:
595 +
596 + xx: 0: Limit for AV1 and AV2;  1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable
597 +
598 + yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.
599 +
600 + yy2 yy2: AC1 or AV1 high limit.
601 +
602 + yy3 yy3: AC2 or AV2 low limit.
603 +
604 + Yy4 yy4: AC2 or AV2 high limit.
605 +
606 +
607 +Example1: AA 00 13 88 00 00 00 00 00 00
608 +
609 +Same as AT+AVLIM=5000,0,0,0   (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)
610 +
611 +Example2: AA 02 01 00
612 +
613 +Same as AT+ DTRI =1,0  (Enable DI1 trigger / disable DI2 trigger)
614 +
615 +
616 +
617 +
618 +**Trigger Settings Payload Explanation:**
619 +
620 +MOD6 Payload : total 11 bytes payload
621 +
622 +|Size(bytes)|1|1|1|6|1|1
623 +|Value|(((
624 +TRI_A
625 +
626 +FLAG
627 +)))|(((
628 +TRI_A
629 +
630 +Status
631 +)))|(((
632 +TRI_DI
633 +
634 +FLAG+STA
635 +)))|Reserve|Enable/Disable MOD6|(((
636 +MOD
637 +
638 +(6)
639 +)))
640 +
641 +
642 +
643 +**TRI FLAG1** is a combination to show if trigger is set for this part. Totally 1byte as below
644 +
645 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
646 +|(((
647 +AV1_
648 +
649 +LOW
650 +)))|(((
651 +AV1_
652 +
653 +HIGH
654 +)))|(((
655 +AV2_
656 +
657 +LOW
658 +)))|(((
659 +AV2_
660 +
661 +HIGH
662 +)))|(((
663 +AC1_
664 +
665 +LOW
666 +)))|(((
667 +AC1_
668 +
669 +HIGH
670 +)))|(((
671 +AC2_
672 +
673 +LOW
674 +)))|(((
675 +AC2_
676 +
677 +HIGH
678 +)))
679 +
680 +* Each bits shows if the corresponding trigger has been configured.
681 +
682 +Example:
683 +
684 +10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW
685 +
686 +
687 +**TRI Status1** is a combination to show which condition is trigger. Totally 1byte as below
688 +
689 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
690 +|(((
691 +AV1_
692 +
693 +LOW
694 +)))|(((
695 +AV1_
696 +
697 +HIGH
698 +)))|(((
699 +AV2_
700 +
701 +LOW
702 +)))|(((
703 +AV2_
704 +
705 +HIGH
706 +)))|(((
707 +AC1_
708 +
709 +LOW
710 +)))|(((
711 +AC1_
712 +
713 +HIGH
714 +)))|(((
715 +AC2_
716 +
717 +LOW
718 +)))|(((
719 +AC2_
720 +
721 +HIGH
722 +)))
723 +
724 +* Each bits shows which status has been trigger on this uplink.
725 +
726 +Example:
727 +
728 +10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.
729 +
730 +
731 +
732 +
733 +**TRI_DI FLAG+STA **is a combination to show which condition is trigger. Totally 1byte as below
734 +
735 +|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0
736 +|N/A|N/A|N/A|N/A|DI2_STATUS|DI2_FLAG|DI1_STATUS|DI1_FLAG
737 +
738 +* Each bits shows which status has been trigger on this uplink.
739 +
740 +Example:
741 +
742 +00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.
743 +
744 +00000101: Means both DI1 and DI2 trigger are enabled.
745 +
746 +
747 +**Enable/Disable MOD6 **: 0x01: MOD6 is enable. 0x00: MOD6 is disable.
748 +
749 +
750 +Downlink command to poll MOD6 status:
751 +
752 +AB 06
753 +
754 +When device got this command, it will send the MOD6 payload.
755 +
756 +
757 +1.
758 +11.
759 +111. Payload Decoder
760 +
761 +
762 +**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/]]
763 +
764 +
765 +
766 +
767 +
768 +
769 +
770 +1.
771 +11. ​Configure LT via AT or Downlink
772 +
773 +User can configure LT I/O Controller via [[AT Commands >>path:#_​Using_the_AT]]or LoRaWAN Downlink Commands
774 +
775 +There are two kinds of Commands:
776 +
777 +* **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
778 +
779 +* **Sensor Related Commands**: These commands are special designed for LT-22222-L.  User can see these commands below:
780 +
781 +
782 +1.
783 +11.
784 +111. Common Commands:
785 +
786 +
787 +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
788 +
789 +
790 +1.
791 +11.
792 +111. Sensor related commands:
793 +
794 +
795 +==== Set Transmit Interval ====
796 +
797 +Set device uplink interval.
798 +
799 +* AT Command:
800 +
801 +AT+TDC=N
802 +
803 +Example: AT+TDC=30000. Means set interval to 30 seconds
804 +
805 +
806 +* Downlink Payload (prefix 0x01):
807 +
808 +0x01 aa bb cc     ~/~/ Same as AT+TDC=0x(aa bb cc)
809 +
810 +
811 +==== Set Work Mode (AT+MOD) ====
812 +
813 +Set work mode.
814 +
815 +* AT Command:
816 +
817 +AT+MOD=N 
818 +
819 +Example: AT+MOD=2. Set work mode to Double DI counting mode
820 +
821 +
822 +* Downlink Payload (prefix 0x0A):
823 +
824 +0x0A aa     ~/~/ Same as AT+MOD=aa
825 +
826 +
827 +
828 +==== Poll an uplink ====
829 +
830 +* AT Command:
831 +
832 +There is no AT Command to poll uplink
833 +
834 +
835 +* Downlink Payload (prefix 0x08):
836 +
837 +0x08 FF     ~/~/ Poll an uplink,
838 +
839 +Example: 0x08FF, ask device to send an Uplink
840 +
841 +
842 +==== Enable Trigger Mode ====
843 +
844 +Use of trigger mode, please check [[ADDMOD6>>path:#MOD6]]
845 +
846 +* AT Command:
847 +
848 +AT+ADDMOD6=1 or 0
849 +
850 +1: Enable Trigger Mode
851 +
852 +0: Disable Trigger Mode
853 +
854 +
855 +* Downlink Payload (prefix 0x0A 06):
856 +
857 +0x0A 06 aa     ~/~/ Same as AT+ADDMOD6=aa,
858 +
859 +
860 +==== Poll trigger settings ====
861 +
862 +Poll trigger settings,
863 +
864 +* AT Command:
865 +
866 +There is no AT Command for this feature.
867 +
868 +
869 +* Downlink Payload (prefix 0x AB 06):
870 +
871 +0xAB 06  ~/~/ Poll trigger settings, device will uplink [[trigger settings>>path:#Trigger_Settings]] once receive this command
872 +
873 +
874 +==== Enable / Disable DI1/DI2/DI3 as trigger ====
875 +
876 +Enable Disable DI1/DI2/DI2 as trigger,
877 +
878 +* AT Command:
879 +
880 +Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >
881 +
882 +Example:
883 +
884 +AT+ DTRI =1,0   (Enable DI1 trigger / disable DI2 trigger)
885 +
886 +
887 +
888 +* Downlink Payload (prefix 0xAA 02):
889 +
890 +0xAA 02 aa bb  ~/~/ Same as AT+DTRI=aa,bb
891 +
892 +
893 +
894 +==== Trigger1 – Set DI1 or DI3 as trigger ====
895 +
896 +Set DI1 or DI3(for LT-33222-L) trigger.
897 +
898 +* AT Command:
899 +
900 +AT+TRIG1=a,b
901 +
902 +a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
903 +
904 +b : delay timing.
905 +
906 +Example:
907 +
908 +AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )
909 +
910 +
911 +* Downlink Payload (prefix 0x09 01 ):
912 +
913 +0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)
914 +
915 +
916 +==== Trigger2 – Set DI2 as trigger ====
917 +
918 +Set DI2 trigger.
919 +
920 +* AT Command:
921 +
922 +AT+TRIG2=a,b
923 +
924 +a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).
925 +
926 +b : delay timing.
927 +
928 +Example:
929 +
930 +AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )
931 +
932 +
933 +* Downlink Payload (prefix 0x09 02 ):
934 +
935 +0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)
936 +
937 +
938 +==== Trigger – Set AC (current) as trigger ====
939 +
940 +Set current trigger , base on AC port. See [[trigger mode>>path:#MOD6]]
941 +
942 +* AT Command:
943 +
944 +AT+ACLIM. See [[trigger mode>>path:#MOD6]]
945 +
946 +
947 +* Downlink Payload (prefix 0xAA 01 ):
948 +
949 +0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>path:#MOD6]]
950 +
951 +
952 +==== Trigger – Set AV (voltage) as trigger ====
953 +
954 +Set current trigger , base on AV port. See [[trigger mode>>path:#MOD6]]
955 +
956 +* AT Command:
957 +
958 +AT+AVLIM. See [[trigger mode>>path:#MOD6]]
959 +
960 +
961 +* Downlink Payload (prefix 0xAA 00 ):
962 +
963 +0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>path:#MOD6]]
964 +
965 +==== Trigger – Set minimum interval ====
966 +
967 +Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.
968 +
969 +* AT Command:
970 +
971 +AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.
972 +
973 +
974 +* Downlink Payload (prefix 0xAC ):
975 +
976 +0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb)   . Unit (min)
977 +
978 +
979 +==== DO ~-~- Control Digital Output DO1/DO2/DO3 ====
980 +
981 +* AT Command:
982 +
983 +There is no AT Command to control Digital Output
984 +
985 +
986 +* Downlink Payload (prefix 0x02):
987 +
988 +0x02 aa bb cc     ~/~/ Set DO1/DO2/DO3 output
989 +
990 +If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.
991 +
992 +01: Low,  00: High ,  11: No action
993 +
994 +|Downlink Code|DO1|DO2|DO3
995 +|02  01  00  11|Low|High|No Action
996 +|02  00  11  01|High|No Action|Low
997 +|02  11  01  00|No Action|Low|High
998 +
999 +Note: For LT-22222-L, there is no DO3, the last byte can use any value.
1000 +
1001 +Device will upload a packet if downlink code executes successfully.
1002 +
1003 +
1004 +
1005 +
1006 +
1007 +==== DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====
1008 +
1009 +* AT Command:
1010 +
1011 +There is no AT Command to control Digital Output
1012 +
1013 +
1014 +* Downlink Payload (prefix 0xA9):
1015 +
1016 +0xA9 aa bb cc     ~/~/ Set DO1/DO2/DO3 output with time control
1017 +
1018 +This is to control the digital output time of DO pin. Include four bytes:
1019 +
1020 +**First Byte:** Type code (0xA9)
1021 +
1022 +**Second Byte**: Inverter Mode
1023 +
1024 +01: DO pins will change back to original state after timeout.
1025 +
1026 +00: DO pins will change to an inverter state after timeout 
1027 +
1028 +
1029 +**Third Byte**: Control Method and Ports status:
1030 +
1031 +|Second Byte|Status
1032 +|0x01|DO1 set to low
1033 +|0x00|DO1 set to high
1034 +|0x11|DO1 NO Action
1035 +
1036 +
1037 +**Fourth Byte**: Control Method and Ports status:
1038 +
1039 +|Second Byte|Status
1040 +|0x01|DO2 set to low
1041 +|0x00|DO2 set to high
1042 +|0x11|DO2 NO Action
1043 +
1044 +
1045 +**Fifth Byte**: Control Method and Ports status:
1046 +
1047 +|Second Byte|Status
1048 +|0x01|DO3 set to low
1049 +|0x00|DO3 set to high
1050 +|0x11|DO3 NO Action
1051 +
1052 +**Sixth and Seventh Byte**:
1053 +
1054 + Latching time. Unit: ms
1055 +
1056 +Device will upload a packet if downlink code executes successfully.
1057 +
1058 +
1059 +
1060 +Example payload:
1061 +
1062 +1. A9 01 01 01 01 07 D0
1063 +
1064 +DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.
1065 +
1066 +
1067 +1. A9 01 00 01 11 07 D0
1068 +
1069 +DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.
1070 +
1071 +
1072 +1. A9 00 00 00 00 07 D0
1073 +
1074 +DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.
1075 +
1076 +
1077 +1. A9 00 11 01 00 07 D0
1078 +
1079 +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
1080 +
1081 +
1082 +
1083 +
1084 +==== Relay ~-~- Control Relay Output RO1/RO2 ====
1085 +
1086 +* AT Command:
1087 +
1088 +There is no AT Command to control Relay Output
1089 +
1090 +
1091 +* Downlink Payload (prefix 0x03):
1092 +
1093 +0x03 aa bb     ~/~/ Set RO1/RO2 output
1094 +
1095 +If payload = 0x030100, it means set RO1 to close and RO2 to open.
1096 +
1097 +01: Close ,  00: Open , 11: No action
1098 +
1099 +|Downlink Code|RO1|RO2
1100 +|03  00  11|Open|No Action
1101 +|03  01  11|Close|No Action
1102 +|03  11  00|No Action|Open
1103 +|03  11  01|No Action|Close
1104 +|03  00  00|Open|Open
1105 +|03  01  01|Close|Close
1106 +|03  01  00|Close|Open
1107 +|03  00  01|Open|Close
1108 +
1109 +Device will upload a packet if downlink code executes successfully.
1110 +
1111 +
1112 +==== Relay ~-~- Control Relay Output RO1/RO2 with time control ====
1113 +
1114 +* AT Command:
1115 +
1116 +There is no AT Command to control Relay Output
1117 +
1118 +
1119 +* Downlink Payload (prefix 0x05):
1120 +
1121 +0x05 aa bb cc dd     ~/~/ Set RO1/RO2 relay with time control:
1122 +
1123 +This is to control the relay output time of relay. Include four bytes:
1124 +
1125 +**First Byte:** Type code (0x05)
1126 +
1127 +**Second Byte(aa)**: Inverter Mode
1128 +
1129 +01: Relays will change back to original state after timeout.
1130 +
1131 +00: Relays will change to an inverter state after timeout
1132 +
1133 +
1134 +**Third Byte(bb)**: Control Method and Ports status:
1135 +
1136 +|Value|Status
1137 +|0x11|RO1 and RO2 to NO
1138 +|0x10|RO2 to NO, RO1 to NC
1139 +|0x01|RO2 to NC, RO1 to NO
1140 +|0x00|RO1 and RO2 to NC.
1141 +|0x20|RO1 No Action, RO2 to NC
1142 +|0x21|RO1 No Action, RO2 to NO
1143 +|0x02|RO1 to NC, RO2 No Action
1144 +|0x12|RO1 to NO, RO2 No Action
1145 +
1146 +
1147 +**Fourth / Fifth Bytes (cc)**: Latching time. Unit: ms
1148 +
1149 +Device will upload a packet if downlink code executes successfully.
1150 +
1151 +
1152 +
1153 +**Example payload:**
1154 +
1155 +1. 05 01 11 07 D0
1156 +
1157 +Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.
1158 +
1159 +
1160 +1. 05 01 10 07 D0
1161 +
1162 +Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.
1163 +
1164 +
1165 +1. 05 00 01 07 D0
1166 +
1167 +Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.
1168 +
1169 +
1170 +1. 05 00 00 07 D0
1171 +
1172 +Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.
1173 +
1174 +
1175 +
1176 +
1177 +
1178 +
1179 +==== Counting ~-~- Voltage threshold counting ====
1180 +
1181 +When voltage exceed the threshold, count. Feature see [[MOD4>>path:#MOD4]]
1182 +
1183 +* AT Command:
1184 +
1185 +AT+VOLMAX    ~/~/ See [[MOD4>>path:#MOD4]]
1186 +
1187 +
1188 +* Downlink Payload (prefix 0xA5):
1189 +
1190 +0xA5 aa bb cc   ~/~/ Same as AT+VOLMAX=(aa bb),cc
1191 +
1192 +
1193 +==== Counting ~-~- Pre-configure the Count Number ====
1194 +
1195 +* AT Command:
1196 +
1197 +AT+SETCNT=aa,(bb cc dd ee)
1198 +
1199 +aa: 1: Set count1,
1200 +
1201 +2: Set count2,
1202 +
1203 +3: Set AV1 count
1204 +
1205 +Bb cc dd ee: number to be set
1206 +
1207 +
1208 +* Downlink Payload (prefix 0xA8):
1209 +
1210 +0x A8 aa bb cc dd ee     ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)
1211 +
1212 +
1213 +
1214 +
1215 +
1216 +==== Counting ~-~- Clear Counting ====
1217 +
1218 +Clear counting for counting mode
1219 +
1220 +* AT Command:
1221 +
1222 +AT+CLRCOUNT ~/~/ clear all counting
1223 +
1224 +
1225 +* Downlink Payload (prefix 0xA6):
1226 +
1227 +0x A6 01     ~/~/ clear all counting,
1228 +
1229 +
1230 +
1231 +
1232 +==== Counting ~-~- Change counting mode save time ====
1233 +
1234 +* AT Command:
1235 +
1236 +AT+COUTIME=60  ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)
1237 +
1238 +
1239 +* Downlink Payload (prefix 0xA7):
1240 +
1241 +0x A7 aa bb cc     ~/~/ same as AT+COUTIME =aa bb cc,
1242 +
1243 +range: aa bb cc:0 to 16777215,  (unit:second)
1244 +
1245 +
1246 +
1247 +
1248 +1.
1249 +11. Integrate with Mydevice
1250 +
1251 +
1252 +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:
1253 +
1254 +
1255 +Step 1: Be sure that your device is programmed and properly connected to the network at this time.
1256 +
1257 +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:
1258 +
1259 +
1260 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image010.png]]
1261 +
1262 +
1263 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image011.png]]
1264 +
1265 +
1266 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image012.png]]
1267 +
1268 +
1269 +
1270 +Step 3: Create an account or log in Mydevices.
1271 +
1272 +Step 4: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.
1273 +
1274 +Search under The things network
1275 +
1276 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image013.png]]
1277 +
1278 +
1279 +After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.
1280 +
1281 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image014.png]]
1282 +
1283 +
1284 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image015.png]]
1285 +
1286 +
1287 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image016.png]]
1288 +
1289 +
1290 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image017.png]]
1291 +
1292 +
1293 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image018.png]]
1294 +
1295 +
1296 +1.
1297 +11. Interface Detail
1298 +111. Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active )
1299 +
1300 +Support NPN Type sensor
1301 +
1302 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image019.png]]
1303 +
1304 +
1305 +
1306 +1.
1307 +11.
1308 +111. Digital Input Port: DI1/DI2 ( For LT-22222-L)
1309 +
1310 +The DI port of LT-22222-L can support NPN or PNP output sensor.
1311 +
1312 +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
1313 +
1314 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image020.png]]
1315 +
1316 +When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.
1317 +
1318 +
1319 +**Example1**: Connect to a Low active sensor.
1320 +
1321 +This type of sensor will output a low signal GND when active.
1322 +
1323 +* Connect sensor’s output to DI1-
1324 +* Connect sensor’s VCC to DI1+.
1325 +
1326 +So when sensor active, the current between NEC2501 pin1 and pin2 is:
1327 +
1328 + //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1329 +
1330 +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.
1331 +
1332 +
1333 +**Example2**: Connect to a High active sensor.
1334 +
1335 +This type of sensor will output a high signal (example 24v) when active.
1336 +
1337 +* Connect sensor’s output to DI1+
1338 +* Connect sensor’s GND DI1-.
1339 +
1340 +So when sensor active, the current between NEC2501 pin1 and pin2 is:
1341 +
1342 + //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.
1343 +
1344 +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.
1345 +
1346 +
1347 +**Example3**: Connect to a 220v high active sensor.公司测试一下
1348 +
1349 +Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler 
1350 +
1351 +* Connect sensor’s output to DI1+ with a serial 50K resistor
1352 +* Connect sensor’s GND DI1-.
1353 +
1354 +So when sensor active, the current between NEC2501 pin1 and pin2 is:
1355 +
1356 + //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 51K.
1357 +
1358 +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.
1359 +
1360 +
1361 +1.
1362 +11.
1363 +111. Digital Output Port: DO1/DO2 /DO3
1364 +
1365 +NPN output: GND or Float. Max voltage can apply to output pin is 36v.
1366 +
1367 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]
1368 +
1369 +
1370 +
1371 +
1372 +1.
1373 +11.
1374 +111. Analog Input Interface
1375 +
1376 +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:
1377 +
1378 +AC2 = (IN2 voltage )/12
1379 +
1380 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]
1381 +
1382 +
1383 +
1384 +Example to connect a 4~~20mA sensor
1385 +
1386 +We take the wind speed sensor as an example for reference only.
1387 +
1388 +Specifications of the wind speed sensor:
1389 +
1390 +Red:12~~24v
1391 +
1392 +Yellow:4~~20mA
1393 +
1394 +Black:GND
1395 +
1396 +
1397 +Connection diagram:
1398 +
1399 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.jpg]]
1400 +
1401 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]
1402 +
1403 +
1404 +
1405 +1.
1406 +11.
1407 +111. Relay Output
1408 +
1409 +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:
1410 +
1411 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]
1412 +
1413 +
1414 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]
1415 +
1416 +
1417 +
1418 +
1419 +
1420 +1.
1421 +11. LEDs Indicators
1422 +
1423 +
1424 +|**LEDs**|**Feature**
1425 +|**PWR**|Always on if there is power
1426 +|**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.
1427 +|**TX**|(((
1428 +Device boot: TX blinks 5 times.
1429 +
1430 +Successful join network: TX ON for 5 seconds.
1431 +
1432 +Transmit a LoRa packet: TX blinks once
1433 +)))
1434 +|**RX**|RX blinks once when receive a packet.
1435 +|**DO1**|
1436 +|**DO2**|
1437 +|**DO3**|
1438 +|**DI2**|(((
1439 +For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1440 +
1441 +For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1442 +)))
1443 +|**DI2**|(((
1444 +For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1445 +
1446 +For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1447 +)))
1448 +|**DI3**|For LT-33222-L ONLY: ON when DI3 is low, LOW when DI3 is high
1449 +|**DI2**|(((
1450 +For LT-22222-L: ON when DI2 is high, LOW when DI2 is low
1451 +
1452 +For LT-33222-L: ON when DI2 is low, LOW when DI2 is high
1453 +)))
1454 +|**RO1**|
1455 +|**RO2**|
1456 +
1457 +
1458 +
1459 +
1460 +1. Use AT Command
1461 +11. Access AT Command
1462 +
1463 +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.
1464 +
1465 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1466 +
1467 +
1468 +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:
1469 +
1470 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]
1471 +
1472 +
1473 +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/]]
1474 +
1475 +AT+<CMD>?        : Help on <CMD>
1476 +
1477 +AT+<CMD>         : Run <CMD>
1478 +
1479 +AT+<CMD>=<value> : Set the value
1480 +
1481 +AT+<CMD>=?       : Get the value
1482 +
1483 +ATZ: Trig a reset of the MCU
1484 +
1485 +AT+FDR: Reset Parameters to Factory Default, Keys Reserve 
1486 +
1487 +AT+DEUI: Get or Set the Device EUI
1488 +
1489 +AT+DADDR: Get or Set the Device Address
1490 +
1491 +AT+APPKEY: Get or Set the Application Key
1492 +
1493 +AT+NWKSKEY: Get or Set the Network Session Key
1494 +
1495 +AT+APPSKEY: Get or Set the Application Session Key
1496 +
1497 +AT+APPEUI: Get or Set the Application EUI
1498 +
1499 +AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)
1500 +
1501 +AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)
1502 +
1503 +AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)  
1504 +
1505 +AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing
1506 +
1507 +AT+PNM: Get or Set the public network mode. (0: off, 1: on)
1508 +
1509 +AT+RX2FQ: Get or Set the Rx2 window frequency
1510 +
1511 +AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)
1512 +
1513 +AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms
1514 +
1515 +AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms
1516 +
1517 +AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms
1518 +
1519 +AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms
1520 +
1521 +AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)
1522 +
1523 +AT+NWKID: Get or Set the Network ID
1524 +
1525 +AT+FCU: Get or Set the Frame Counter Uplink
1526 +
1527 +AT+FCD: Get or Set the Frame Counter Downlink
1528 +
1529 +AT+CLASS: Get or Set the Device Class
1530 +
1531 +AT+JOIN: Join network
1532 +
1533 +AT+NJS: Get OTAA Join Status
1534 +
1535 +AT+SENDB: Send hexadecimal data along with the application port
1536 +
1537 +AT+SEND: Send text data along with the application port
1538 +
1539 +AT+RECVB: Print last received data in binary format (with hexadecimal values)
1540 +
1541 +AT+RECV: Print last received data in raw format
1542 +
1543 +AT+VER: Get current image version and Frequency Band
1544 +
1545 +AT+CFM: Get or Set the confirmation mode (0-1)
1546 +
1547 +AT+CFS: Get confirmation status of the last AT+SEND (0-1)
1548 +
1549 +AT+SNR: Get the SNR of the last received packet
1550 +
1551 +AT+RSSI: Get the RSSI of the last received packet
1552 +
1553 +AT+TDC: Get or set the application data transmission interval in ms
1554 +
1555 +AT+PORT: Get or set the application port
1556 +
1557 +AT+DISAT: Disable AT commands
1558 +
1559 +AT+PWORD: Set password, max 9 digits
1560 +
1561 +AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode
1562 +
1563 +AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470
1564 +
1565 +AT+CFG: Print all settings
1566 +
1567 +
1568 +
1569 +1.
1570 +11. Common AT Command Sequence
1571 +111. Multi-channel ABP mode (Use with SX1301/LG308)
1572 +
1573 +If device has not joined network yet:
1574 +
1575 +123456
1576 +
1577 +AT+FDR
1578 +
1579 +123456
1580 +
1581 +AT+NJM=0
1582 +
1583 +ATZ
1584 +
1585 +
1586 +If device already joined network:
1587 +
1588 +AT+NJM=0
1589 +
1590 +ATZ
1591 +
1592 +1.
1593 +11.
1594 +111. Single-channel ABP mode (Use with LG01/LG02)
1595 +
1596 +123456   Enter Password to have AT access.
1597 +
1598 +AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1599 +
1600 +123456   Enter Password to have AT access.
1601 +
1602 +AT+CLASS=C Set to work in CLASS C
1603 +
1604 +AT+NJM=0 Set to ABP mode
1605 +
1606 +AT+ADR=0 Set the Adaptive Data Rate Off
1607 +
1608 +AT+DR=5  Set Data Rate
1609 +
1610 +AT+TDC=60000  Set transmit interval to 60 seconds
1611 +
1612 +AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1613 +
1614 +AT+RX2FQ=868400000 Set RX2Frequency to 868.4Mhz (according to the result from server)
1615 +
1616 +AT+RX2DR=5  Set RX2DR to match the downlink DR from server. see below
1617 +
1618 +AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.
1619 +
1620 +ATZ          Reset MCU
1621 +
1622 +**Note:**
1623 +
1624 +1. Make sure the device is set to ABP mode in the IoT Server.
1625 +1. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1626 +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.
1627 +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
1628 +
1629 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image031.png]]
1630 +
1631 +
1632 +1.
1633 +11.
1634 +111. Change to Class A
1635 +
1636 +
1637 +If sensor JOINED
1638 +
1639 +AT+CLASS=A
1640 +
1641 +ATZ
1642 +
1643 +
1644 +
1645 +
1646 +
1647 +1. FAQ
1648 +
1649 +
1650 +1.
1651 +11. How to upgrade the image?
1652 +
1653 +The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:
1654 +
1655 +* Support new features
1656 +* For bug fix
1657 +* Change LoRaWAN bands.
1658 +
1659 +
1660 +Below shows the hardware connection for how to upload an image to the LT:
1661 +
1662 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]
1663 +
1664 +
1665 +**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]].
1666 +
1667 +**Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].
1668 +
1669 +**Step3: **Open flashloader; choose the correct COM port to update.
1670 +
1671 +**For LT-33222-L**:
1672 +
1673 +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.
1674 +
1675 +**For LT-22222-L**:
1676 +
1677 +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.
1678 +
1679 +
1680 +
1681 +|(((
1682 +Board detected
1683 +)))
1684 +
1685 +|(((
1686 +
1687 +)))
1688 +
1689 +[[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]]
1690 +
1691 +
1692 +
1693 +[[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]]
1694 +
1695 +
1696 +[[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]]
1697 +
1698 +
1699 +**Notice**: In case user has lost the program cable. User can hand made one from a 3.5mm cable. The pin mapping is:
1700 +
1701 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image038.png]]
1702 +
1703 +
1704 +1.
1705 +11. How to change the LoRa Frequency Bands/Region?
1706 +
1707 +User can follow the introduction for [[how to upgrade image>>path:#upgrade_image]]. When download the images, choose the required image file for download.
1708 +
1709 +
1710 +1.
1711 +11. How to set up LT to work with Single Channel Gateway such as LG01/LG02?
1712 +
1713 +In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.
1714 +
1715 +Assume we have a LG02 working in the frequency 868400000 now , below is the step.
1716 +
1717 +
1718 +**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.
1719 +
1720 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image039.png]]
1721 +
1722 +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.
1723 +
1724 +
1725 +**Step2: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:
1726 +
1727 +123456   Enter Password to have AT access.
1728 +
1729 +AT+FDR   Reset Parameters to Factory Default, Keys Reserve
1730 +
1731 +123456   Enter Password to have AT access.
1732 +
1733 +AT+NJM=0 Set to ABP mode
1734 +
1735 +AT+ADR=0 Set the Adaptive Data Rate Off
1736 +
1737 +AT+DR=5  Set Data Rate (Set AT+DR=3 for 915 band)
1738 +
1739 +AT+TDC=60000  Set transmit interval to 60 seconds
1740 +
1741 +AT+CHS=868400000 Set transmit frequency to 868.4Mhz
1742 +
1743 +AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1
1744 +
1745 +ATZ                Reset MCU
1746 +
1747 +As shown in below:
1748 +
1749 +[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image040.png]]
1750 +
1751 +
1752 +
1753 +1.
1754 +11. Can I see counting event in Serial?
1755 +
1756 +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.
1757 +
1758 +
1759 +
1760 +
1761 +1. Trouble Shooting     
1762 +11. Downlink doesn’t work, how to solve it?
1763 +
1764 +Please see this link for how to debug:
1765 +
1766 +[[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]]
1767 +
1768 +
1769 +1.
1770 +11. Have trouble to upload image.
1771 +
1772 +See this link for trouble shooting:
1773 +
1774 +[[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]]
1775 +
1776 +
1777 +1.
1778 +11. Why I can’t join TTN in US915 /AU915 bands?
1779 +
1780 +It might be about the channels mapping. Please see this link for detail:
1781 +
1782 +[[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]]
1783 +
1784 +
1785 +
1786 +
1787 +1. Order Info
1788 +
1789 +
1790 +**For LT-33222-L-XXX or LT-22222-L-XXX:**
1791 +
1792 +**XXX:**
1793 +
1794 +* **EU433**: LT with frequency bands EU433
1795 +* **EU868**: LT with frequency bands EU868
1796 +* **KR920**: LT with frequency bands KR920
1797 +* **CN470**: LT with frequency bands CN470
1798 +* **AS923**: LT with frequency bands AS923
1799 +* **AU915**: LT with frequency bands AU915
1800 +* **US915**: LT with frequency bands US915
1801 +* **IN865**: LT with frequency bands IN865
1802 +* **CN779**: LT with frequency bands CN779
1803 +
1804 +
1805 +1. Packing Info
1806 +
1807 +**Package Includes**:
1808 +
1809 +* LT I/O Controller x 1
1810 +* Stick Antenna for LoRa RF part x 1
1811 +* Bracket for controller x1
1812 +* Program cable x 1
1813 +
1814 +
1815 +**Dimension and weight**:
1816 +
1817 +* Device Size: 13.5 x 7 x 3 cm
1818 +* Device Weight: 105g
1819 +* Package Size / pcs : 14.5 x 8 x 5 cm
1820 +* Weight / pcs : 170g
1821 +
1822 +
1823 +1. Support
1824 +
1825 +* 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.
1826 +* 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
1827 +
1828 +[[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]

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