Best method to measure power consumption for smart plug / light switch etc..

[ahmedadelhosni]

Hello,

What do you use to measure the power consumption ? accurate, easy, cheap and don't break down easily.

I know about the ACS712 but the reviews in sparkfun are not so good : https://www.sparkfun.com/products/8883

What do you think ?

[Yveaux]

@ahmedadelhosni I just love the INA219

[gohan]

That is a current sensor, so unless you take power factor into account, your measurements will not be very precise. I think the easiest way would be to get a sonoff pow, unless you really want to go DIY

[ahmedadelhosni]

@Yveaux said in Best method to measure power consumption for smart plug / light switch etc..:

INA219

Is this for AC loads ? I guess this is for DC

[ahmedadelhosni]

@gohan sonoff does power measurements ?

I need DIY for my projects. I don't want to use already manufactured products.

[gohan]

https://learn.openenergymonitor.org/electricity-monitoring/ctac/how-to-build-an-arduino-energy-monitor

[Yveaux]

@ahmedadelhosni yup. You didn't say this was a requirement