Welcome to the HardwareSerialRS485 wiki!
Arduino RS485 communication software
This project provides a software suite to support the use of an RS485 transceiver connected to the USART (Tx/Rx pins) in a half-duplex, concurrent multi-drop (i.e. multi-master, multi-slave) environment. For this purpose, the software suite provides capabilities for message addressing and filtering as well as collision detection and collision avoidance.
Project page: https://github.com/MichaelJonker/HardwareSerialRS485
Release history: https://github.com/MichaelJonker/HardwareSerialRS485/releases
The library versions prior to 2.2.0 do not work with IDE 1.6.6 and above. With library version 2.2.0 this issue is fixed.