OUTDATED WIKI, PLEASE REFER TO https://www.waveshare.com/wiki/Modbus_RTU_Relay Command format The command contains 8 bytes: Byte 1:Address Byte 2:Function code Byte3 4:Address of register (big-endian) Byte 5 6:data of register (big-endian) Byte7 8:CRC cheksum (little-endian) ...
If you want to insert the RS485 CAN HAT into the Raspberry Pi, connect the A and B ports of the Modbus RTU Relay module and the RS485 CAN HAT module. If you use other 485 devices, you need to make sure A-A and B-B. Run the following commands: sudo apt-get install unzip wget...
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Modbus RTU Relay 16CH From Waveshare Wiki Development Protocol Function Code Introduction Function CodeDescriptionNote 01Read coil statusRead relay status 03Read holding registerRead the address and version 05Write single coilWrite single relay 06Write single registerSet the baud rate and address...
Insert the RS485 CAN HAT into the Raspberry Pi, and connect the Modbus RTU Relay module to the RS485 CAN HAT through A and B. If you are using other 485 devices, make sure to connect A-A, B-B.< br/> Run the following commands to run the demo: ...
Select Connection->Connect..., select Modbus RTU/ASCII Over TCP/IP for Connection, select RTU for Mode, and enter the correct IP address and port number. Click OK to connect. After the connection is normal, you can check the current relay status. Select the corresponding channel, then doubl...
through RS485 connectionSIM7600E - H 4 g DTUandModbus RTU Relay: Configure TCP, set the baud rate to 9600, and fill in the IP address and port number of the server (this is the TCP server shared on the Internet). Configure Modbus. After modbus is enabled, fill in the hex data to...
If you want to insert the RS485 CAN HAT into the Raspberry Pi, connect the A and B ports of the Modbus RTU Relay module and the RS485 CAN HAT module. If you use other 485 devices, you need to make sure A-A and B-B. Run the following commands to run the demo: sudo apt-get...
Insert the RS485 CAN HAT into the Raspberry Pi, and connect the Modbus RTU Relay module to the RS485 CAN HAT through A and B. If you are using other 485 devices, make sure to connect A-A, B-B< br/> Run the following commands to run the demo: ...