The Gravity: I2C Digital Wattmeter (SEN0291) is a compact, high-resolution, and high-accuracy module designed to measure voltage, current, and power for a wide range of electronic modules and electrical systems. This versatile I2C power monitor is capable of measuring up to 26V and ±8A, making this digital wattmeter ideal for evaluating power consumption, battery life, and solar energy system efficiency in any Arduino power meter project. Key Features Wide measurement range: 0–26V, ±8A, up to 206W digital wattmeter capacity High resolution: 4mV (voltage), 1mA (current), 4–20mW (power) monitoring Maximum relative error: ±0.2% (after calibration) for precise current sensor data Bidirectional current sensing on the high side – detect charging and discharging states easily Based on TI INA219 current/power monitor chip with low temperature drift precision 10mΩ alloy sampling resistor with high precision and 2W power rating Compatible with 3.3V and 5V controllers – works with Arduino, ESP32, Raspberry Pi Selectable I2C address (via DIP switch): 0x40, 0x41, 0x44, 0x45 for I2C power monitor setups Applications Solar power management systems using an efficient I2C power monitor Battery fuel gauging and power consumption monitoring with this digital wattmeter DC motor protection and overload detection with integrated current sensor technology Power consumption monitoring of sensors, microcontrollers, and full Arduino power meter projects IoT energy efficiency testing with a high-accuracy INA219 sensor module Whether you're monitoring a battery-powered sensor node, measuring motor load, or optimizing solar charge/discharge efficiency, this digital wattmeter module provides precise, real-time data for your current sensor needs. Specifications Input Voltage (VCC): 3.3V – 5.5V Voltage Measurement Range: 0 – 26V Voltage Resolution: 4mV Voltage Error: < ±0.2% Current Measurement Range: ±8A (Bidirectional) Current Resolution: 1mA Current Error: < ±0.2% (Manual calibration required) Power Range: 0 – 206W Power Resolution: 20mW (Hardware), 4mW (Software) Quiescent Current: 0.7mA Interface: Gravity I2C (3.3V logic level) Power Monitor I2C Addresses: 0x40, 0x41, 0x44, 0x45 (selectable via DIP switch) Dimensions: 30mm × 22mm (1.18in × 0.87in) Weight: 4g Package Includes 1 × Gravity: I2C Digital Wattmeter (SEN0291) 1 × Gravity 4-Pin I2C/UART Sensor Cable
