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iSpindle replacement firmware for beer brewing/fermenting


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Gravity Monitor for Beer Brewing

GravityMon Logo

GravityMon is a replacement firmware for the iSpindle firmware. It's 100% compatible with the iSpindle hardware design so it does not require any hardware changes. From v1.2 you can also use GravityMon for the DIY Floaty Hardware with ESP32 Lite.

Now also works with ESP32 d1 mini, ESP32 c3 mini, ESP32 S2 mini, ESP32 S3 mini which are pin compatible with ESP8266.

Installation can be made using or the web version at

The documentation can be found here:

Visit the gravitymon homepage here for more information about the project:

If you want to support my work you can do that through these options


Thanks to the following persons for supporting me and this project:

  • David Conde, @davidconde
  • Lars H.
  • Vonchilliman
  • Andreas Dohl
  • StodgyWaif