Feature: 1. ROW PIN PULSE: The newly upgraded row pin pulse version is more suitable for integrated use of PCBs, making it easier to measure power and calibrate errors. 2. COMM INTERFACE: The physical layer uses a comm interface from UART to TTL, with a baud rate of 9600, 8 data bits, 1 stop bit, and no verification. 3. FUNCTION CODES: Supports 0x03 (read hold register), 0x04 (read input register), 0x006 (write single register), 0x41 (calibration), 0x42 (power reset), etc. The 0x41 function code is only for internal use (address can only be 0xF8). 4. HOST SLAVE MACHINE: The slave does not need to reply to the host and uses the address OxF8 as the universal address, which can only be used in a single slave device and can be used as a calibration address. 5. CRC VERIFICATION: Adopts a 16 bit format, occupying two bytes, and generates a polynomial of X16+X15+X2+1, the polynomial value used for calculation is 0xA001. Specification: Item Type: Multifunction Meter Module Material: PCB Voltage Measurement Range: 80-260V Resolution: 0.1V Measurement Accuracy: 0.5% Current Measurement Range: 0-100A Starting Current: 0.02A Resolution: 0.001A Measurement Accuracy: 0.5% Active Power Measurement Range: 0-23kW Starting Power: 0.4W Resolution: 0.1W Display Format: <1000W Display 1 decimal place, such as 999.9W; ≥1000W, display only integers, such as 1000W Power Measurement Range: 0.00-1.00 Resolution: 0.01 Measurement Accuracy: 1% Frequency Measurement Range: 45Hz-65Hz Resolution: 0.1Hz Measurement Accuracy: 0.5% Active Energy Metering Range: 0-9999.99kWh Resolution: 1Wh Measurement Accuracy: 0.5% Display Format: <10kWh, display unit is Wh (lkWh=1000Wh), such as 9999Wh; ≥ 10kWh, displayed in kWh, such as 9999.99kWh Electric Energy Reset: Software Reset Power Over Limit Alarm: The active power threshold can be set, and when the measured active power exceeds the set threshold, the alarm status will be set.. Package List: 1 x Test Module1 x User Manual1 x Closed CT