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Last modified by Mengting Qiu on 2025/06/04 18:42
From version 66.20
edited by Xiaoling
on 2022/05/24 13:53
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To version 66.23
edited by Xiaoling
on 2022/05/24 13:57
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199 199  
200 200  == 3.1 How it works? ==
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202 202  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. 
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203 203  
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204 204  In case user can’t set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>path:http://8.211.40.43/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LT-22222-L/#H4.UseATCommand]] to set the keys in the devices.
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205 205  
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206 206  3.2 Example to join LoRaWAN network
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207 207  
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208 208  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. 
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209 209  
210 210  [[image:image-20220523172350-1.png||height="266" width="864"]]
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305 305  
306 306  **For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.
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308 308  Total : 11 bytes payload
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309 309  
310 310  [[image:image-20220523180452-3.png]]
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319 319  * FIRST: Indicate this is the first packet after join network.
320 320  * DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
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322 322  (% style="color:red" %)Note: DO3 bit is not valid for LT-22222-L.
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323 323  
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324 324  **To use counting mode, please run:**
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325 325  
326 326  (% class="box infomessage" %)
327 327  (((
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328 328  **AT+MOD=2**
329 329  )))
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330 330  
331 331  (% class="box infomessage" %)
332 332  (((
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333 333  **ATZ**
334 334  )))
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335 335  
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336 336  (% style="color:#4f81bd" %)**AT Commands for counting:**
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337 337  
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338 338  **For LT22222-L:**
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339 339  
340 340  (% class="box infomessage" %)
341 341  (((
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342 342  **AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms) **
343 343  )))
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344 344  
345 345  (% class="box infomessage" %)
346 346  (((
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347 347  **AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms ) **
348 348  )))
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349 349  
350 350  (% class="box infomessage" %)
351 351  (((
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352 352  **AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms) **
353 353  )))
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354 354  
355 355  (% class="box infomessage" %)
356 356  (((
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357 357  **AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms ) **
358 358  )))
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359 359  
360 360  (% class="box infomessage" %)
361 361  (((
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362 362  **AT+SETCNT=1,60   (Set COUNT1 value to 60)**
363 363  )))
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364 364  
365 365  (% class="box infomessage" %)
366 366  (((
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367 367  **AT+SETCNT=2,60   (Set COUNT2 value to 60)**
368 368  )))
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369 369  
370 370  === 3.3.3 AT+MOD~=3, Single DI Counting + 2 x ACI ===
371 371