Android loses connection to ZQ520 if the printer is powered off


  • For a US customer we run Zebra ZQ 520 printers connected to android phones and tablets.
  • We use the Zebra SDK to connect to the printer.
  • We use the android OS to pair with the printer and our app stores the mac of the printer so it can re connect every day when it needs to print
  • Our app doesn't do the pairing, the android os is used for paring.

What we are seeing is if the customer turns the printer off for more than 10 minutes the printer is unpaired in the android OS.

We saw similar results with the RW420 if we tried to print to the printer while it was out of range. On returning into range the user had to re pair the printer.

We tested this on several different android Handhelds.

Is this an issue you've seen before?

Are there any workarounds?



Anonymous (not verified)
Hi Ronan, We have seen this,

Hi Ronan, We have seen this, both with the printer being off for a while and if you try to connect to it while it is out of range or offline.  We only see it with Android 6.0 and above and only on some devices.  This behavior is controlled by the Android OS so there is only so much we can do from the printer.  That being said, we are gathering information about this issue so that we can properly find fixes.  Can you share the models and OS versions of your Android devices? If you found you don't have the issue on some devices, what are those models and versions?

You might also consider switching to BTLE on the new ZQ520 printer.  It might be slower but we have not seen this issue come up using it, as it doesn't require pairing.  We have a separate library for Android BTLE in the SDK.


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