Modbus RTU 0x0, 0x1 ,0x3 and 0x4 code

[Radwan_Shalloudi]

Hi everyone, I'm looking for modbus extension that have code for 0x0 , 0x1, 0x3 and 0x4 code, I looked at other extension all of them just have 0x3 And 0x4 code.
Does anyone can help?

[ChrisWard]

Hello Radwan

Try your request here:

ModbusRTU extension

I have made an extension for Modbus RTU serial communication, for my own needs. It can read and write single registers and is based on my SerialOTG extension (can be expanded to read/write multiple registers). I can make it available to Appinventor users. Please return if there is any interest and any specific functions that you need.

[zhuowen_zhang]

Hello, I'm glad to see this production. The issue with modbusRTU has been bothering me for a long time. If possible, could you please share it with me? Thank you for your help. You can send it to my email 602940308@qq.com