1It is mainly used for measuring DC voltage, current, active power, frequency and energy consumption 2Comes with built in shunt, the current measure range is 0.01-10A 3Physical layer use UART to RS485 communication interface, baud rate is 9600, 8 data bits, 2 stop bit, no parity 4The application layer use the ModbusRTU protocol to communicate, it only supports function codes such as 0x03, 0x04,0x06, 0x41, 0x42, etc 5Voltage threshold can be set, divide into high voltage and low voltage threshold, when the measured voltage exceeds the threshold, it can alarm
