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nRF Master Control Panel for Android crashes when displaying details of fast advertising peripheral

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Dear Nordic team,

I've seen very much reproducible crashes of your Android nRF Master Control Panel app when trying to see details (button "MORE") of particular Peripheral device. When I use aggressive advertising intervals (down to 20ms for connectable beacon) and dynamic advertising data (altering at least couple of bits to have each ADV_IND packet unique) it works only if I go to "MORE" menu at the very early stages of scanning. It seems to me that once number of logged points exceeds certain limit (internal buffer?;) it crashes completely and app must be restarted.

I'm using latest nRF MCP version from Google Play Store (V3.4.1) and Nexus 5 running Android 6.0 but I've seen this on other devices and Android versions as well. I believe that it's OK to drop some parts of the log instead of uncontrolled crash...

Thanks Jan

Update on 3-February-2016

The latest Google Play upgrade (version 4.0.3) fixes the crashes, great work! Thanks for the testing. I'd still change the behavior of manual scan option, also note that for this "dynamic" beacon you don't display any advertising interval - probably because the data are different - but you obviously link reports by Adv. Address so you could easily add the timing estimation as well. But these are rather change requests and end user feedback which is up to you to add to your backlog or not;)

Cheers Jan

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    Hi Jan,

    Thanks for the bug report. I'll try to fix it. Indeed there is a limit in data I can send from one activity to another and your way of advertising is on a very good way to exceed this limit. I'll try to fix this issue in a next release, hopefully.

    Thanks for using the app!

    Best Regards, Aleksander

  • 0 in reply to Aleksander Nowakowski

    I will be able to test new MCP on Nexus 5 in January but current phone is running almost mint Android 5.0.2 on Snapdragon 400 with 1GB RAM so it should be representative gadget. I can help you to modify beacon example from SDK to use connectable advertisement with 20ms interval and rolling 32-bit counter placed into Major&Minor Version fields if necessary to reproduce.

    Regarding second topic: I was expecting this implementation logic but wouldn't be better to "remember" in what state manual scanning was? Why should be scanning stopping all the time when user explicitly sets "manual" mode so he remembers that he started scanning and kind of expects that app will do what it should do?;) Just an idea. I obviously don't use MCP as ultimate validation app, there are better sniffers for that so I luckily don't need to juggle with several phones;)

    Thanks Jan

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  • 0 in reply to Aleksander Nowakowski

    I will be able to test new MCP on Nexus 5 in January but current phone is running almost mint Android 5.0.2 on Snapdragon 400 with 1GB RAM so it should be representative gadget. I can help you to modify beacon example from SDK to use connectable advertisement with 20ms interval and rolling 32-bit counter placed into Major&Minor Version fields if necessary to reproduce.

    Regarding second topic: I was expecting this implementation logic but wouldn't be better to "remember" in what state manual scanning was? Why should be scanning stopping all the time when user explicitly sets "manual" mode so he remembers that he started scanning and kind of expects that app will do what it should do?;) Just an idea. I obviously don't use MCP as ultimate validation app, there are better sniffers for that so I luckily don't need to juggle with several phones;)

    Thanks Jan

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