Battery indicator

[Jacek S]

Hi,

Is there any chance for battery indicator?
Now I must remove sdcard and boot oryginal firmware to find out if something is wrong with my program or the battery level is low.

Jacek

[Anders Søborg]

Hi Jacek

Yes it is possible but I never got around to implementing it. As I remember one of the Unix-Devices (probably the /dev/lms_dcm device) in the sensorManager has access to info about the brick…. you are more than welcome to have a look at it if you are up for it…

/Anders

[Jacek S]

Ok, great. I will try. Thanks

[Kristofer Jaxne]

I see that MonoBrickFirmware.Management have now support to show battery voltage and current. Can I use that to build an own form of indicator? Isn’t I’m needing some form of reference values of minimum and maximum first?

[Anders Søborg]

Hi there

No the current is returned in mA and the voltage in mV

/Anders

[Kristofer Jaxne]

Do you have any idea of example values for low battery level and just charged?

[Anders Søborg]

Hi there

Do you have any idea of example values for low battery level and just charged?

No sorry – you will have to try.

[Jacek S]

Hi,

From the lego mindstorm source code:

#define BATT_INDICATOR_HIGH 7500 //!< Battery indicator high [mV]
#define BATT_INDICATOR_LOW 6200 //!< Battery indicator low [mV]

#define ACCU_INDICATOR_HIGH 7500 //!< Rechargeable battery indicator high [mV]
#define ACCU_INDICATOR_LOW 7100 //!< Rechargeable battery indicator low [mV]

Jacek

[Kristofer Jaxne]

Is there any way to see if connected battery is the rechargeable type or not?

[Anders Søborg]

Hi

No not to my knowledge…

/Anders

[Tcm0]

There is a button at the back of the ev3 that only gets pressed by the akku. It should be detectable somehow.

[Anders Søborg]

Hi Max

Could you please post a picture of this… I do not have a rechargeable battery.

/Anders

[Tcm0]

It’s exactly the same with the NXT’s rechargable battery.

• This reply was modified 8 years, 11 months ago by Tcm0.
• This reply was modified 8 years, 11 months ago by Tcm0.

[Bernhard Hofmann]

I wonder what my battery level is. 😉

• This reply was modified 8 years, 6 months ago by Bernhard Hofmann.

[Bernhard Hofmann]

Well that didn’t work on my mobile, trying with my laptop now…

[Author]

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