Modbus RTU RS485 Relay Module

2 relay module connected using RS845 with different slave addresses on each module. The relay modules are to 12v power supply and a RS485 to USB converter is used to connected to a Windows computer with as the Master to send Modbus RTU command HEX data to turn on and off the relay.

[@hdiwaluyo163]

ide bagus 👍👍👍

[@ToyTechMachines]

Terima kasih 🙂

[@harim3920]

How did u create this app ?

[@ToyTechMachines]

I created this app using Visual Studio 2017 C# WinFroms

[@iceunicorn3707]

@@ToyTechMachines can you please share the c# code?

[@ToyTechMachines]

Here is the command to control this Modbus RTU relay module
drive.google.com/file/d/1QyxCSGPmCuhT9oSNIKC3G0I8yf2mogsZ/view
The command looks something like this "FF 05 00 00 FF 00 99 E4"
Send the command using Serial Port
C# code
byte[] bytesToSend = new byte[8] { 0xFF, 0x05, 0x00, 0x00, 0xFF, 0x00, 0x99, 0xE4 }; // Turn relay 1 On
I purchased from
www.aliexpress.com/item/1005002356820940.html

[@MC-tl2jj]

Can you share this project please

[@ToyTechMachines]

Sure www.aliexpress.com/item/1005002356820940.html

[@RICHCREWSPLASHSET]

This is my question can more than one be active at the same time

[@ToyTechMachines]

Sure