I've an atmega 8 microcontroller and an atmel studio application to program in C embedd language. I've a battery of 12v5 amp with BMS attached. Now I want to check see how much battery percentage is there using c embeded.
Can anyone help me the code?

 

I've a battery of 12v5 amp with BMS attached

Do you have a spec for that? Or a link to a website that's selling it? Maybe it's something like this.

 

For a lithium battery you can get an approximate capacity from the terminal voltage.
https://www.benzoenergy.com/blog/po...age-and-capacity-of-18650-li-ion-battery.html