EM3EV BMS Monitor

π=3.1415926

About this app

BMS Monitor for Bluetooth-enabled EM3EV batteries. Shows per-cell voltages and battery health.

This app is fully open-source; you may contribute changes at https://github.com/thekroko/em3evbms via pull requests

Ratings and reviews

Brings back per cell voltages for the EM3EV battery that were not accessible with the original app. Appears to work well. Would like the percentage to display larger for when I am riding and would like an easy to glance at percentage. Stretch goal. Be able to calculate Wh/mile by using the GPS. With ability to set averaging window.

Looks good so far! Thanks! Feature request, is it possible to set it so my phone alarms when pack gets to a certain cell voltage, or a certain pack % charge. I would like to be able to manually stop the charger once it gets to 80% charge for example, or once it gets to 4.05v per cell. Something like that.

Pixel 2 sees the em3ev BMS but can't pair with it. Running Android 11. UPDATE: Restarting the app fixed the connection problem. App is minimal. However, it shows that the em3ev battery is very healthy after a couple 1000 miles of demanding riding.

What's new

+ Added cell voltage min/max/avg calculation
+ Fixed temperature conversion