ESP-Modbus Library

An Espressif ESP-Modbus Library (esp-modbus) is a library to support Modbus communication in the networks based on RS485 or Ethernet interfaces. The Modbus is a data communications protocol originally published by Modicon (now Schneider Electric) in 1979 for use with its programmable logic controllers (PLCs).

• The Overview, Messaging Model And Data Mapping
• Modbus Port Initialization
• Modbus Master API
• Modbus Slave API
• Possible Communication Issues And Solutions
• Application Example
• Protocol References
• API Reference
• Modbus Endianness Conversion API Reference