I just purchased two of the ADC121C_ACS714_1Channel_Dc_Current_Monitoring_Sensor from NCD. I’m using Raspberry Pi and this library to read the current.
However, I’m getting 2.054A when even there is no current to read. I see the problem on both sensors so I don’t think its a bad component. I read Register 0, which according to the spec holds the latest ADC conversion value, and I get 0x806. Shouldn’t this register be zero when there is no circuit being sensed?
Is there any calibration I need to do beforehand?