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Extremely high current consumption during advertising - broadcast mode(ble_app_temp)

Rafal

I have written application similar to ble_app_temp (posted by Ole Morten) and during the test I noticed that current consumption is extremly high. I used brand new coin battery that was included in evaluation kit and after ~10 minutes battery status was only 40% ( I checked this also with ble_app_hrs app). At the beginning I though that it was caused by the data included in advertisment packet ( I added 10 bytes of data to manufacturer data - adv interval was 1 second), but then I tested my battery with original app (ble_app_temp) and the effect was the same. My question is: did anyone also encountered such a problem with high current consumpion in case of broadcaster mode? I will test different battery today but I am afraid that is not case of battery.

Thanks in advance for your help.

ble_app_temp.zip

  • 0 in reply to Rafal

    Beware that coin cells have a very non-linear discharge curve, and measuring battery voltage directly hence doesn't give a clear picture of the actual charge left in the battery.

    It would have been much easier to help you if you could find some method to measure the current so that you could actually see the exact current numbers going into the chip. Even a cheap multimeter should be able to give a usable number, or an oscilloscope or similar measuring voltage over a resistor. Often, information on what numeric value the current consumption has can also tell something about what the problem is.

  • 0

    I will try to do it in next few days (borrow oscilloscope, cut solder bridge and mount additional resistor). When I perform first test with new equipment, I will post my results.

  • 0

    Hi Ole,

    could you tell which SDK app can be used as reference in current consumption tests? I was able to connect oscilloscope to P1 on EK (I have cut SB8 and mounted 10 Ohm resitior on R4) and measured voltage drop - it reaches 380mV. If I am right this corresponds to 38mA. It is rather high... I am testing same app as before - ble_app_temp. Board is powered through USB cabel.

    Best regards, Rafał Urbański

  • 0 in reply to Ole Morten

    Hi Ole morten Thanks for your comment , for me it really worked. when i used the INTENSET the current consumption was about 4.10mA and when I removed it, the current consumption was about 40-60uA. Thanks for your support Regards Prasad

  • 0 in reply to Ole Morten

    Hi Ole morten Thanks for your comment , for me it really worked. when i used the INTENSET the current consumption was about 4.10mA and when I removed it, the current consumption was about 40-60uA. Thanks for your support Regards Prasad

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