Skip to Content
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 41.28
edited by Xiaoling
on 2022/06/06 11:12
Change comment: There is no comment for this version

Summary

Details

Page properties
Content
... ... @@ -1348,6 +1348,7 @@
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 =
... ... @@ -1385,17 +1385,23 @@
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 ==
... ... @@ -1420,7 +1420,9 @@
1420 1420  )))
1421 1421  
1422 1422  
1434 +(((
1423 1423  If device already joined network:
1436 +)))
1424 1424  
1425 1425  (% class="box infomessage" %)
1426 1426  (((
... ... @@ -1459,10 +1459,12 @@
1459 1459  
1460 1460  (% style="color:red" %)**Note:**
1461 1461  
1475 +(((
1462 1462  (% style="color:red" %)1. Make sure the device is set to ABP mode in the IoT Server.
1463 1463  2. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.
1464 1464  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.
1465 1465  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 +)))
1466 1466  
1467 1467  [[image:1654136435598-589.png]]
1468 1468