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

Note

The latest documentation for the esp-modbus v1.x.x can be found: esp-modbus stable documentation v1. The latest stable documentation for the version v2.x.x is addressed on the link: esp-modbus stable documentation v2. Please also refer to the esp-modbus discussions page of the project to get latest information.