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Last modified by Xiaoling on 2025/04/23 15:57
From version 41.22
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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1348 1348  )))
1349 1349  
1350 1350  
1351 +
1351 1351  == 3.9 LEDs ==
1352 1352  
1353 1353  (% border="1" style="background-color:#ffffcc; color:green; width:332px" %)
... ... @@ -1371,9 +1371,13 @@
1371 1371  3.3v position: set to compatible with 3.3v I/O.,
1372 1372  )))
1373 1373  
1375 +(((
1374 1374  **+3.3V**: is always ON
1377 +)))
1375 1375  
1379 +(((
1376 1376  **+5V**: Only open before every sampling. The time is by default, it is AT+5VT=0.  Max open time. 5000 ms.
1381 +)))
1377 1377  
1378 1378  
1379 1379  = 4. Case Study =
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1385 1385  
1386 1386  == 5.1 Access AT Command ==
1387 1387  
1393 +(((
1388 1388  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.
1395 +)))
1389 1389  
1390 1390  [[image:1654135840598-282.png]]
1391 1391  
1392 1392  
1400 +(((
1393 1393  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:
1402 +)))
1394 1394  
1395 1395  [[image:1654136105500-922.png]]
1396 1396  
1397 1397  
1407 +(((
1398 1398  More detail AT Command manual can be found at [[AT Command Manual>>||anchor="H3.5ConfigureRS485-BLviaATorDownlink"]]
1409 +)))
1399 1399  
1400 1400  
1401 1401  == 5.2 Common AT Command Sequence ==
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1420 1420  )))
1421 1421  
1422 1422  
1434 +(((
1423 1423  If device already joined network:
1436 +)))
1424 1424  
1425 1425  (% class="box infomessage" %)
1426 1426  (((