server_user_defined_function

Example of the component plasmapper/pl_modbus v1.2.1

Modbus Server User-Defined Function Example

  1. CustomModbusServer class inherits ModbusServer class and overrides ReadRtuData and HandleRequest methods to implement user-defined function with function code 100 that receives 1 byte and responds with the same byte + data array of random byte values (the array size is determined by the received value).
  2. CustomModbusServer is created with UART0 as a port, Modbus RTU protocol and station address 1.
  3. UART0 is initialized.
  4. UART0 parameters are set to 115200 bps, 8 data bits, even parity, 1 stop bit and no flow control.
  5. UART0 is enabled.
  6. CustomModbusServer is enabled.

To create a project from this example, run:

idf.py create-project-from-example "plasmapper/pl_modbus=1.2.1:server_user_defined_function"

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