feature/add user error handler

espressif / esp-modbus

ESP-Modbus - the officially suppported library for Modbus protocol (serial RS485 + TCP over WiFi or Ethernet).

Apache License 2.0

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feature/add user error handler #62

Open alisitsyn opened 2 months ago

alisitsyn commented 2 months ago

This PR adds the user error handler. This handler is called on packet processing error and allows to catch the request/response buffers for the corresponded Modbus transaction.

This PR addresses the issue: https://github.com/espressif/esp-modbus/issues/60