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CDBUS is a protocol for Asynchronous Serial Communication. When used with RS485:
It introduces an arbitration mechanism that automatically avoids conflicts like the CAN bus.
Support dual baud rate, provide high speed communication, maximum rate ≥ 10 Mbps.
Supports unicast, multicast and broadcast.
Max payload data size is 253 byte.
Hardware packing, unpacking, verification and filtering, save your time and CPU usage.
Backward compatible with traditional RS485 hardware. (still retains arbitration function)