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Last modified by Xiaoling on 2025/04/23 15:57
From version 41.20
edited by Xiaoling
on 2022/06/06 11:06
Change comment: There is no comment for this version
To version 41.29
edited by Xiaoling
on 2022/06/06 11:12
Change comment: There is no comment for this version

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... ... @@ -1280,38 +1280,75 @@
1280 1280  
1281 1281  == 3.7 +3V3 Output ==
1282 1282  
1283 +(((
1283 1283  RS485-BL has a Controllable +3V3 output, user can use this output to power external sensor.
1285 +)))
1284 1284  
1287 +(((
1285 1285  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 +)))
1286 1286  
1291 +(((
1287 1287  The +3V3 output time can be controlled by AT Command.
1293 +)))
1288 1288  
1295 +(((
1296 +
1297 +)))
1289 1289  
1299 +(((
1290 1290  (% style="color:#037691" %)**AT+3V3T=1000**
1301 +)))
1291 1291  
1303 +(((
1304 +
1305 +)))
1292 1292  
1307 +(((
1293 1293  Means set +3v3 valid time to have 1000ms. So, the real +3v3 output will actually have 1000ms + sampling time for other sensors.
1309 +)))
1294 1294  
1311 +(((
1295 1295  By default, the AT+3V3T=0. This is a special case, means the +3V3 output is always on at any time
1313 +)))
1296 1296  
1297 1297  
1298 1298  == 3.8 +5V Output ==
1299 1299  
1318 +(((
1300 1300  RS485-BL has a Controllable +5V output, user can use this output to power external sensor.
1320 +)))
1301 1301  
1322 +(((
1302 1302  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 +)))
1303 1303  
1326 +(((
1304 1304  The 5V output time can be controlled by AT Command.
1328 +)))
1305 1305  
1330 +(((
1331 +
1332 +)))
1306 1306  
1334 +(((
1307 1307  (% style="color:#037691" %)**AT+5VT=1000**
1336 +)))
1308 1308  
1338 +(((
1339 +
1340 +)))
1309 1309  
1342 +(((
1310 1310  Means set 5V valid time to have 1000ms. So, the real 5V output will actually have 1000ms + sampling time for other sensors.
1344 +)))
1311 1311  
1346 +(((
1312 1312  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 +)))
1313 1313  
1314 1314  
1351 +
1315 1315  == 3.9 LEDs ==
1316 1316  
1317 1317  (% border="1" style="background-color:#ffffcc; color:green; width:332px" %)
... ... @@ -1318,6 +1318,8 @@
1318 1318  |=**LEDs**|=(% style="width: 274px;" %)**Feature**
1319 1319  |**LED1**|(% style="width:274px" %)Blink when device transmit a packet.
1320 1320  
1358 +
1359 +
1321 1321  == 3.10 Switch Jumper ==
1322 1322  
1323 1323  (% border="1" style="background-color:#ffffcc; color:green; width:515px" %)
... ... @@ -1333,9 +1333,13 @@
1333 1333  3.3v position: set to compatible with 3.3v I/O.,
1334 1334  )))
1335 1335  
1375 +(((
1336 1336  **+3.3V**: is always ON
1377 +)))
1337 1337  
1379 +(((
1338 1338  **+5V**: Only open before every sampling. The time is by default, it is AT+5VT=0.  Max open time. 5000 ms.
1381 +)))
1339 1339  
1340 1340  
1341 1341  = 4. Case Study =
... ... @@ -1347,17 +1347,23 @@
1347 1347  
1348 1348  == 5.1 Access AT Command ==
1349 1349  
1393 +(((
1350 1350  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 +)))
1351 1351  
1352 1352  [[image:1654135840598-282.png]]
1353 1353  
1354 1354  
1400 +(((
1355 1355  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 +)))
1356 1356  
1357 1357  [[image:1654136105500-922.png]]
1358 1358  
1359 1359  
1407 +(((
1360 1360  More detail AT Command manual can be found at [[AT Command Manual>>||anchor="H3.5ConfigureRS485-BLviaATorDownlink"]]
1409 +)))
1361 1361  
1362 1362  
1363 1363  == 5.2 Common AT Command Sequence ==
... ... @@ -1382,7 +1382,9 @@
1382 1382  )))
1383 1383  
1384 1384  
1434 +(((
1385 1385  If device already joined network:
1436 +)))
1386 1386  
1387 1387  (% class="box infomessage" %)
1388 1388  (((
... ... @@ -1421,10 +1421,12 @@
1421 1421  
1422 1422  (% style="color:red" %)**Note:**
1423 1423  
1475 +(((
1424 1424  (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1425 1425  2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1426 1426  3. Make sure SF / bandwidth setting in LG01/LG02 match the settings of AT+DR. refer [[this link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.
1427 1427  4. The command AT+RX2FQ and AT+RX2DR is to let downlink work. to set the correct parameters, user can check the actually downlink parameters to be used. As below. Which shows the RX2FQ should use 868400000 and RX2DR should be 5
1480 +)))
1428 1428  
1429 1429  [[image:1654136435598-589.png]]
1430 1430  
... ... @@ -1433,13 +1433,23 @@
1433 1433  
1434 1434  == 6.1 How to upgrade the image? ==
1435 1435  
1489 +(((
1436 1436  The RS485-BL LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to RS485-BL to:
1491 +)))
1437 1437  
1438 -* Support new features
1439 -* For bug fix
1440 -* Change LoRaWAN bands.
1493 +* (((
1494 +Support new features
1495 +)))
1496 +* (((
1497 +For bug fix
1498 +)))
1499 +* (((
1500 +Change LoRaWAN bands.
1501 +)))
1441 1441  
1503 +(((
1442 1442  Below shows the hardware connection for how to upload an image to RS485-BL:
1505 +)))
1443 1443  
1444 1444  [[image:1654136646995-976.png]]
1445 1445