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ESP32 Battery Monitor

Measures three channels via W-Fi and Thingspeak

ESP32 Battery Monitor
This project shows the simplicity and ease of measuring analogue values with an ESP32 board and to send the values via Wi-Fi to a router, and from there, to the ThingSpeak website where the data are saved and displayed.
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Download the BOM list
The BOM (Bill of Materials) is the technically exhaustive listing of parts and other hardware items used to produce the working and tested prototype of any Elektor Labs project. The BOM file contains deeper information than the Component List published for the same project in Elektor Magazine. If required the BOM gets updated directly by our lab engineers. As a reader, you can download the list here.
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Component list

Component List


R1,R3,R6 = 1.1MΩ, 1%, 600mW, 350V

R2,R4,R7 = 576kΩ, 1%, 600mW, 350V

R5 = 1kΩ, carbon film, 5%, 0.25W, 250V



C1,C2,C3 = 100nF, 50V, X7R, 0.2" pitch



LED1 = red, 3mm

MOD1 = ESP32 PICO Kit V4

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