MultiWii

Can I make my own battery monitor with resistors? Multiwii will read this? Can I see the battery level in the GUI?
In wich pin I have to plug it?
The GUI displays the altitude? Wich measure system? Foots?
yhanks

For a 3s Cell use
R1=33k and R2=51k
Connect to A3 pin on PromMini
Or A0 On a Mega board.

We are using Metric system in the project.
The GUI displays the altitude in meters.

33k to ground and 55k to vcc? 10kohm from GND to analog input? The GUI displays the battery level?

Thanks

I used a 47k and 30.6k (its all I had), but that seems to work fine.
How do I calibrate the voltage readings with the actual battery voltage levels?

I put a fully charged 11.1v lipo on that said it had reached 12.5v and the reading from the control board was only 11.4v ?

1 use voltmeter and measure battery voltage v1
2 attach bat to mwii and get volt reading v2
3 set vbatscale to old.vbatscale * v1 / v2
4 set levels to 10* warning voltage
5 fly and repeat 1 to 3 for finetuning

Thanks but I think there is something wrong with your math.
Original vbatscale was 131
Battery with voltmeter was 12.46 and the GUI said 11.6.
131 * 12.46 / 11.6 = 140 (which pushed the voltage reading further off.
I actually needed a vbatscale value of 122 for my resistor values and the real voltage closely matches the GUI now.
This should have been old.vbatscale * v2 / v1 = new.vbatscale,

Not complaining, I appreciate the help but thought I would clarify this in case anybody else comes accros this thread.

Anyway, solved now.