Built for a simple job: keeping an eye on the onboard battery while travelling. Is it charging? How much is left? What’s drawing power?

FOSSiBOT F2400 Companion brings battery level, remaining time and power readings to your phone, Android Auto or a standalone tablet—ideal as a campervan dashboard.

I found BrightEMS frustrating, so this connects directly over Bluetooth. No accounts, cloud setup, Wi-Fi or internet needed.

Switch AC, DC, USB and Lamp outputs, adjust supported charging settings and timers, and view fault diagnostics. Phone and tablet layouts include an animated power-flow schematic and three themes. No ads or subscriptions.

Tested with my F2400-B. Requires Android 12+.

TESTERS WANTED!
Help us test the app before we can release to the general public. If you have a Bluetooth F2400, we'd love feedback from your phone, tablet or Android Auto setup!

Screenshots and tester sign-up:
https://www.maddenuk.net/f2400/

By Steve Madden. Not affiliated with FOSSi