10
8. Communication Protocol
SPM91 support standard Modbus communication protocol, and support 0x03 and 0x10
command. Please refer to below registers list.
Because some data is too long, the device uses two registers to present. And these
data is transits in way of “low byte in the former, high byte in the back”.
Real-time data registers (0x03 RO)
× 0.1, unit: kWh
Low byte in the back, high byte in the former.
Range: 0-999999.9