I've uploaded the Open energy monitor code in the arduino uno board, without connecting any circuit to the arduino. but in the serial monitor, its displaying some values. someone kindly help me. thank you
When you read inputs that are not connected to anything, you usually get nonsense.
You may not have any EXTERNAL circuitry connected, but you still have the circuitry on the Arduino board. The software is reading the voltage on the unterminated pins of the Arduino. Connect up the external circuitry and the readings will be correct.
Thank you all. I'm working on a project based on open energy monitor.
what do you get when you connect a voltage divider ?