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Last modified by Xiaoling on 2025/04/23 15:57
From version 41.25
edited by Xiaoling
on 2022/06/06 11:11
Change comment: There is no comment for this version
To version 41.21
edited by Xiaoling
on 2022/06/06 11:07
Change comment: There is no comment for this version

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... ... @@ -1280,75 +1280,38 @@
1280 1280  
1281 1281  == 3.7 +3V3 Output ==
1282 1282  
1283 -(((
1284 1284  RS485-BL has a Controllable +3V3 output, user can use this output to power external sensor.
1285 -)))
1286 1286  
1287 -(((
1288 1288  The +3V3 output will be valid for every sampling. RS485-BL will enable +3V3 output before all sampling and disable the +3V3 after all sampling. 
1289 -)))
1290 1290  
1291 -(((
1292 1292  The +3V3 output time can be controlled by AT Command.
1293 -)))
1294 1294  
1295 -(((
1296 -
1297 -)))
1298 1298  
1299 -(((
1300 1300  (% style="color:#037691" %)**AT+3V3T=1000**
1301 -)))
1302 1302  
1303 -(((
1304 -
1305 -)))
1306 1306  
1307 -(((
1308 1308  Means set +3v3 valid time to have 1000ms. So, the real +3v3 output will actually have 1000ms + sampling time for other sensors.
1309 -)))
1310 1310  
1311 -(((
1312 1312  By default, the AT+3V3T=0. This is a special case, means the +3V3 output is always on at any time
1313 -)))
1314 1314  
1315 1315  
1316 1316  == 3.8 +5V Output ==
1317 1317  
1318 -(((
1319 1319  RS485-BL has a Controllable +5V output, user can use this output to power external sensor.
1320 -)))
1321 1321  
1322 -(((
1323 1323  The +5V output will be valid for every sampling. RS485-BL will enable +5V output before all sampling and disable the +5v after all sampling. 
1324 -)))
1325 1325  
1326 -(((
1327 1327  The 5V output time can be controlled by AT Command.
1328 -)))
1329 1329  
1330 -(((
1331 -
1332 -)))
1333 1333  
1334 -(((
1335 1335  (% style="color:#037691" %)**AT+5VT=1000**
1336 -)))
1337 1337  
1338 -(((
1339 -
1340 -)))
1341 1341  
1342 -(((
1343 1343  Means set 5V valid time to have 1000ms. So, the real 5V output will actually have 1000ms + sampling time for other sensors.
1344 -)))
1345 1345  
1346 -(((
1347 1347  By default, the AT+5VT=0. If the external sensor which require 5v and require more time to get stable state, user can use this command to increase the power ON duration for this sensor.
1348 -)))
1349 1349  
1350 1350  
1351 -
1352 1352  == 3.9 LEDs ==
1353 1353  
1354 1354  (% border="1" style="background-color:#ffffcc; color:green; width:332px" %)
... ... @@ -1372,13 +1372,9 @@
1372 1372  3.3v position: set to compatible with 3.3v I/O.,
1373 1373  )))
1374 1374  
1375 -(((
1376 1376  **+3.3V**: is always ON
1377 -)))
1378 1378  
1379 -(((
1380 1380  **+5V**: Only open before every sampling. The time is by default, it is AT+5VT=0.  Max open time. 5000 ms.
1381 -)))
1382 1382  
1383 1383  
1384 1384  = 4. Case Study =
... ... @@ -1390,16 +1390,12 @@
1390 1390  
1391 1391  == 5.1 Access AT Command ==
1392 1392  
1393 -(((
1394 1394  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 -)))
1396 1396  
1397 1397  [[image:1654135840598-282.png]]
1398 1398  
1399 1399  
1400 -(((
1401 1401  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 -)))
1403 1403  
1404 1404  [[image:1654136105500-922.png]]
1405 1405