DIY Current Monitor on Raspberry Pi. My power calculation isn't accurate. Help please?

[Bill.Thomson]

@david0

I’m using an ADS1115 I2C ADC to get the analog input into my Pi.

Forum user ybizeul tried using the ADS1115 only to find out its max sampling rate (860 SPS)
is too slow. Here’s the thread:

ADS1115 and sampling speed

I’m experimenting with Wemos D1 Mini and using it to read from two CT sensors. I just realized that by nature the sampling algorithm is kind of slow. I was able to change the ADS1015 rate to 3200/s and change its default read delay from 8 to 4ms, but the library still needs a fair amount of time to go through the 1480 samples. The reason why it is a problem for me is that I also have a photo resistor on pin 0 of the ADS1015, that photo resistor is used to catch a laser light that is going thro…

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There are several threads on the forum about the ADS1115.
This should help show why the ADS1115 isn’t suitable:

Emonlib and ADS1115 on Wemos

Sometimes a picture (or two) helps… Here’s what a clean sine wave should look like: Note that this is an ideal sine wave. The mains voltage waveform isn’t quite this “clean” i.e it is distorted, and the amount of distortion varies depending on several factors. [image] If the sample rate of an Analog to Digital Converter is too low, the waveform gets distorted. This is the picture from post 23 in the thread I referenced: [image] Compare that to the “clean” waveform above, and it’s…