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After upgrading SensorTag firmware 1.3, buzzer is not working

Hi, 

I've recently upgraded firmware of sensortag to 1.3 however whenever I click the buzzer button in the official app(for ios) of sensortag my phone disconnects from the sensortag. And I also try to write 0x04 into the i/o characteristic that is given in the example code, but the result is still the same: connection loss.

So, I suppose there is a change in the buzzer service but I cannot find what is changed. From now on, am I suppose to write different value to i/o characteristic in order to open the buzzer?(By the way, red and green leds are working fine)

Regards, 

K.G.

  • Kerim,

    I'm not sure what 1.3 is. Is that a version number on the android/ios sensortag app?
    Do you have any sniffer logs by any chance? The battery's charge is ok I take it? It's strange that it's just the buzzer.

    Tom
  • Tom,

    I meant the firmware of the sensortag device, (I should have written 1.30 not 1.3, sorry for that). 

    No, I don't have sniffer logs but I will try again later today. The charge of the battery is okay(shown as 80% in the sensortag app). 

    Thanks,

    KG

  • There has been no change to the IO service that should cause this, but I remember that a previous version of the IOS app could cause unexpected behaviour of IO. Our IOS developer is on holidays now, but we can take a look when he's back. Do you have chance to try the same with BTOOL, BLE Device Monitor or the Android app?

  • Hi,

    When I connected to the sensortag device with Android app there is no i/o view shown; so I couldn't try it. On the other hand, I tried with the android and iOS apps that I developed for sensortag and whenever I try to open buzzer, the device immediately disconnects.(Although there is no problem with the device that has 1.20 fw) Finally, in the official iOS app, sometimes buzzer is working but mostly the sensortag device disconnects after clicking buzzer on. I will try with another sensortag device later today and I will post the results.

    KG
  • Hi again,

    I tried with another sensortag device and no problem occured. And when I switched the batteries of the previous device(the one with the buzzer problem) and the other, it's buzzer starts working. So, I guess the problem is caused by the battery, I don't know maybe after some threshold battery level buzzer is automatically closed or something.

    By the way the level of the battery is shown as 70%-80%(sometimes 80% shown, sometimes %70). The level of the other battery is 87%

    Regards,
    KG
  • Yes, the buzzer is extremely greedy on power (~15 mA) so with a low battery level activating it can easily make the whole device malfunction.