esp-idf/components/freemodbus
..
common
modbus
port
serial_master
serial_slave
CMakeLists.txt
Kconfig
README.rst
component.mk
sdkconfig.rename

README.rst

# Modbus assumptions, dependencies and constraints

1. Current implementation of Modbus has limitation: maximum frame size should be less than 120 bytes (default UART receive FIFO full threshold value).
This limitation is removed in ESP-IDF v4.2.

2. The only one instance of Modbus port can be initialized at the same time.