Messages have 6 header bytes, data bytes and 1 checksum byte. The 6 header bytes are: 1: i2c destination address (0x82) 2: i2c reply address (0x80) 3,4: message class 5: message type (0x04 = request) 6: data length (0x00 in case of a request)
A python library and a set of command line tools to communicate with an Itho WPU.