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User Manual for LoRaWAN End Nodes - RS485-LN – RS485 to LoRaWAN Converter User Manual

Downlink Command:

0xA6 aa bb cc same as AT+RXMODE=aa,(bb<<8 | cc)



Example:

The RS485-LN is set to AT+RXMODE=2,1000

There is a two Modbus commands in the RS485 network as below:

The Modbus master send a command: 01 03 00 00 00 02 c4 0b

And Modbus slave reply with: 01 03 04 00 00 00 00 fa 33

RS485-LN will capture both and send the uplink: 01 03 00 00 00 02 c4 0b01 03 04 00 00 00 00 fa 33



Notice: Listening mode can work with the default polling mode of RS485-LN. When RS485-LN is in to send the

RS485 commands (from AT+COMMANDx), the listening mode will be interrupt for a while.

3.7 Buttons

Button Feature

ACT If RS485 joined in network, press this button for more than 1 second, RS485 will upload a packet,

and the SYS LED will give a Blue blink

RST Reboot RS485

PRO Use for upload image, see How to Update Image

3.8 LEDs

LEDs Feature

PWR Always on if there is power

SYS After device is powered on, the SYS will fast blinkin GREENfor 5 times, means RS485-LN start to join

LoRaWAN network. If join success, SYS will be on GREEN for 5 seconds.SYS will blink Blueon

every upload and blink Greenonce receive a downlink message.

4. Case Study

User can check this URL for some case studies: APP RS485 COMMUNICATE WITH SENSORS

Page 30 / 38 - last modiﬁed by Bei Jinggeng on 2022/07/08 16:50

Dragino RS485-LN User Manual

Questions and Answers: