ebus provides c++ classes to communicate via eBUS.

The eBUS is a two-wire bus that operates at a speed of 2400 baud and is used in heating systems. The participants (max. 25 masters, 228 slaves) exchange messages (=telegrams) in a byte-oriented protocol with byte-oriented arbitration. Implementation with standard UART (8 bits + start and stop bits) and a CRC byte (generator polynomial: x8 + x7 + x4 + x3 + x + 1) for data protection.

On the bus, a message is sent or received as a sequence of characters. The two main classes of this library, Sequence (low-level) and Telegram (high-level), can store such a sequence or message.

The purpose of the Sequence class is to replace or insert special characters and calculate the CRC byte. The Telegram class can analyze, generate and evaluate these sequences according to the eBUS specification.

The EbusHandler has implemented routines for sending and receiving all types of telegrams and the option of collecting statistical data about the eBUS system. To perform this task, the EbusHandler requires a serial bus device.

Datatypes offers various functions for decoding/encoding in accordance with the eBUS data types.

Compilation requires CMake and a C++ compiler with C++14 support.

Among examples:

[deprecated] EbusStack offers the possibility to act as a fully-fledged eBUS participant. It has been implemented as a PIMPL idiom and runs in its own thread. EbusStack also requires ppoll and pthread support.

For bugs and missing features use github issue system.

The author can be contacted at [email protected].