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Last modified by Xiaoling on 2025/04/23 15:57
From version 41.23
edited by Xiaoling
on 2022/06/06 11:10
Change comment: There is no comment for this version
To version 41.27
edited by Xiaoling
on 2022/06/06 11:11
Change comment: There is no comment for this version

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1372 1372  3.3v position: set to compatible with 3.3v I/O.,
1373 1373  )))
1374 1374  
1375 +(((
1375 1375  **+3.3V**: is always ON
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1376 1376  
1379 +(((
1377 1377  **+5V**: Only open before every sampling. The time is by default, it is AT+5VT=0.  Max open time. 5000 ms.
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1378 1378  
1379 1379  
1380 1380  = 4. Case Study =
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1386 1386  
1387 1387  == 5.1 Access AT Command ==
1388 1388  
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1389 1389  RS485-BL supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to RS485-BL to use AT command, as below.
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1390 1390  
1391 1391  [[image:1654135840598-282.png]]
1392 1392  
1393 1393  
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1394 1394  In PC, User needs to set (% style="color:blue" %)**serial tool**(%%)(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600**(%%) to access to access serial console of RS485-BL. The default password is 123456. Below is the output for reference:
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1395 1395  
1396 1396  [[image:1654136105500-922.png]]
1397 1397  
1398 1398  
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1399 1399  More detail AT Command manual can be found at [[AT Command Manual>>||anchor="H3.5ConfigureRS485-BLviaATorDownlink"]]
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1400 1400  
1401 1401  
1402 1402  == 5.2 Common AT Command Sequence ==
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1421 1421  )))
1422 1422  
1423 1423  
1434 +(((
1424 1424  If device already joined network:
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1425 1425  
1426 1426  (% class="box infomessage" %)
1427 1427  (((