OverviewThis is a 4-ch current and power monitor HAT designed for Raspberry Pi. Via the I2C or SMBus interface, it is easy to monitor each channel’s current, voltage, and power consumption, as well as the voltage between both sides of the sampling resistor.FeaturesStandard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards4-ch monitoring, via I2C/SMBus interfaceOnboard 0.1Ω 1％ sampling resistor, allows measuring bi-directional current up to 3.2AEmbedded 12-bit ADC, supports multiple successive converting, 0~26V voltage measuring rangeDirectly calculate and output measured power value through additional multiply registerI2C control pins for connecting with other host boardsComes with development resources and manual (examples for Raspberry Pi/Arduino/STM32)SpecificationsOperating voltage: 3.3V/5VControl interface: I2C/SMBusSampling resistor: 0.1Ω 1%Voltage range: 0~26VCurrent range: ±3.2AResolution: 0.8mA (±3.2A range) OR 0.1mA (±400mA range)Dimensions: 65mm × 30mmMounting hole size: 3.0mmDimensionsWhat’s in the box?1 x Current/Voltage/Power Monitor HATResourcesWiki : www.waveshare.com/wiki/Current/Power_Monitor_HAT