Finally, I found a way to measure Voltage with Arduino or ESP32 with high accuracy using this Voltmeter module which is basically external 16 bits ADC ADS1115 + voltage divider + EPROM for storing calibration data. This module is made by M5Stack so it is easiest to use it with M5Stack development systems. But it will work on any development board. I am planing to use it to monitor my solar panells.
SUBSCRIBE HERE:
https://www.youtube.com/channel/UCit2rVgOvhyuAD-VH5H_IHg?sub_confirmation=1
You can buy this module here: https://www.banggood.com/custlink/GKmdZSaTAm
Here is discount code:
BGM5v34
You can also buy me a coffe at:
https://ko-fi.com/volosprojects
Development boards used in video:
M5Stack Core2 https://www.banggood.com/custlink/G3mhVNnhoG
M5Stack : https://www.banggood.com/custlink/mDGRIsg3hi
M5Stick Plus https://www.banggood.com/custlink/GK3hSh50M5
M5StickC https://www.banggood.com/custlink/DDGhtb9vp5
code:
https://github.com/VolosR/M5stackVoltmeter
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