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Last modified by Xiaoling on 2025/04/23 15:57
From version 41.17
edited by Xiaoling
on 2022/06/06 11:05
Change comment: There is no comment for this version
To version 41.25
edited by Xiaoling
on 2022/06/06 11:11
Change comment: There is no comment for this version

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... ... @@ -976,7 +976,9 @@
976 976  
977 977  (% style="color:#037691" %)**A8 01 06 0A 05 00 04 00 00 00**(%%): to deactivate the RS485 Alarm
978 978  
979 +(((
979 979  A8 is type code and 01 means add CRC-16/MODBUS at the end, the 3^^rd^^ byte is 06, means the next 6 bytes are the command to be sent to the RS485 network, the final byte 00 means this command don’t need to acquire output.
981 +)))
980 980  
981 981  
982 982  **Example 2:**
... ... @@ -1270,7 +1270,7 @@
1270 1270  
1271 1271  == 3.6 Buttons ==
1272 1272  
1273 -(% border="1" style="background-color:#ffffcc; color:green; width:233px" %)
1275 +(% border="1" cellspacing="10" style="background-color:#ffffcc; color:green; width:233px" %)
1274 1274  |=(% style="width: 89px;" %)**Button**|=(% style="width: 141px;" %)**Feature**
1275 1275  |(% style="width:89px" %)**RST**|(% style="width:141px" %)Reboot RS485-BL
1276 1276  
... ... @@ -1278,38 +1278,75 @@
1278 1278  
1279 1279  == 3.7 +3V3 Output ==
1280 1280  
1283 +(((
1281 1281  RS485-BL has a Controllable +3V3 output, user can use this output to power external sensor.
1285 +)))
1282 1282  
1287 +(((
1283 1283  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 +)))
1284 1284  
1291 +(((
1285 1285  The +3V3 output time can be controlled by AT Command.
1293 +)))
1286 1286  
1295 +(((
1296 +
1297 +)))
1287 1287  
1299 +(((
1288 1288  (% style="color:#037691" %)**AT+3V3T=1000**
1301 +)))
1289 1289  
1303 +(((
1304 +
1305 +)))
1290 1290  
1307 +(((
1291 1291  Means set +3v3 valid time to have 1000ms. So, the real +3v3 output will actually have 1000ms + sampling time for other sensors.
1309 +)))
1292 1292  
1311 +(((
1293 1293  By default, the AT+3V3T=0. This is a special case, means the +3V3 output is always on at any time
1313 +)))
1294 1294  
1295 1295  
1296 1296  == 3.8 +5V Output ==
1297 1297  
1318 +(((
1298 1298  RS485-BL has a Controllable +5V output, user can use this output to power external sensor.
1320 +)))
1299 1299  
1322 +(((
1300 1300  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 +)))
1301 1301  
1326 +(((
1302 1302  The 5V output time can be controlled by AT Command.
1328 +)))
1303 1303  
1330 +(((
1331 +
1332 +)))
1304 1304  
1334 +(((
1305 1305  (% style="color:#037691" %)**AT+5VT=1000**
1336 +)))
1306 1306  
1338 +(((
1339 +
1340 +)))
1307 1307  
1342 +(((
1308 1308  Means set 5V valid time to have 1000ms. So, the real 5V output will actually have 1000ms + sampling time for other sensors.
1344 +)))
1309 1309  
1346 +(((
1310 1310  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 +)))
1311 1311  
1312 1312  
1351 +
1313 1313  == 3.9 LEDs ==
1314 1314  
1315 1315  (% border="1" style="background-color:#ffffcc; color:green; width:332px" %)
... ... @@ -1316,6 +1316,8 @@
1316 1316  |=**LEDs**|=(% style="width: 274px;" %)**Feature**
1317 1317  |**LED1**|(% style="width:274px" %)Blink when device transmit a packet.
1318 1318  
1358 +
1359 +
1319 1319  == 3.10 Switch Jumper ==
1320 1320  
1321 1321  (% border="1" style="background-color:#ffffcc; color:green; width:515px" %)
... ... @@ -1331,9 +1331,13 @@
1331 1331  3.3v position: set to compatible with 3.3v I/O.,
1332 1332  )))
1333 1333  
1375 +(((
1334 1334  **+3.3V**: is always ON
1377 +)))
1335 1335  
1379 +(((
1336 1336  **+5V**: Only open before every sampling. The time is by default, it is AT+5VT=0.  Max open time. 5000 ms.
1381 +)))
1337 1337  
1338 1338  
1339 1339  = 4. Case Study =
... ... @@ -1345,12 +1345,16 @@
1345 1345  
1346 1346  == 5.1 Access AT Command ==
1347 1347  
1393 +(((
1348 1348  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 +)))
1349 1349  
1350 1350  [[image:1654135840598-282.png]]
1351 1351  
1352 1352  
1400 +(((
1353 1353  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 +)))
1354 1354  
1355 1355  [[image:1654136105500-922.png]]
1356 1356