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Re: [Paparazzi-devel] Battery display in GCS?


From: Gautier Hattenberger
Subject: Re: [Paparazzi-devel] Battery display in GCS?
Date: Mon, 16 Feb 2015 21:22:29 +0100
User-agent: Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.4.0

Hi,

The battery level of a battery (I assume you are using Li-Po), depends on the current drown by the motor. For a 3 cell battery:
- full charge, no throttle: 12.5 V
- full throttle, full charge: depends of the motor but can go down to 10.
- regular voltage after some time, no or little throttle: 11.1 V
- never go below 9.3 V, it may damage the battery.

Gautier

Le 16/02/2015 20:07, Ori Pessach a écrit :
Which message is used to update the GCS battery level display? I've seen references to a BAT message, but I don't see those in the log files. 

The display is behaving erratically for me, so I'm trying to track down whether the problem is with the hardware or with the software. The graph would go from showing over 12V when I boot up the drone, to as low as 10.7 (almost immediately) right after takeoff, and then back to close to 12V when the drone lands. Crashes, actually. 

I'm wondering - what is that graph actually showing? It really doesn't seem to be the output from the battery.

Thanks,

Ori


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