Custom Board - nRF Toolkit HRS app Disconnects within 10 - 30 seconds

RE: Custom Board - nRF Toolkit HRS app Disconnects within 10 - 30 seconds

Michael Antwih — Sun, 22 Jan 2017 11:10:00 GMT

Were you able to get your system going correctly?

RE: Custom Board - nRF Toolkit HRS app Disconnects within 10 - 30 seconds

Michael Antwih — Mon, 09 Jan 2017 16:56:05 GMT

Sorry for the delay. What type of antenna are you using in your design. Could you possible share that information with me. maybe in a pm if needed. Considering your antenna design and pcb stackup have you calculated the expected impedance of the rf path to get a general idea? If you don't have a network or spectrum analyzer the best bet would be to do the rough calculation to see where you sit if you believe it is RSSI related.

Another thing you can do to verify this is decrease the separation between the devices, meaning place the custom board pretty much on top of the device running the connect app. This will effectively provide an increase in RSSI and hopefully provide some information. I would actually try this first before doing any calculations since it is a very easy and quick thing to do.

RE: Custom Board - nRF Toolkit HRS app Disconnects within 10 - 30 seconds

Pradeep — Thu, 05 Jan 2017 08:56:33 GMT

HRS and Proximity sample work perfectly in nRF52 Dev Kit, does not work as expected in my custom board. As per your suggestion, i believe it is most likely RSSI issues with antenna.

Could you provide some pointers on how to tune the antenna to resolve the RSSI issue?

RE: Custom Board - nRF Toolkit HRS app Disconnects within 10 - 30 seconds

Michael Antwih — Wed, 04 Jan 2017 16:37:06 GMT

Were you able to debug on the custom board side? Do the results change with difference distances between the two? Could it be an RSSI issue and you start dropping packages. the nrf Connect app is via a mobile device correct? Have you attempted to try a different mobile device to see if you get the same results.

If you have a nrf5x development board load your code on the development board and run it against the same nrf connect on the same mobile device you are having troubles with. This will tell you where it is hardware related or software related.

If it fails on the dvk then it is software related. If it works then most likely it is a RSSI issue so the antenna on the custom board might need tuning.

RE: Custom Board - nRF Toolkit HRS app Disconnects within 10 - 30 seconds

Pradeep — Wed, 04 Jan 2017 15:45:40 GMT

Any other suggestions. I am really stuck on this.

I flashed the Proximity sample to my custom board, Time out error is happening every 20 - 30 seconds in nRF connect App. I am clueless where the issue is.

Need help !

RE: Custom Board - nRF Toolkit HRS app Disconnects within 10 - 30 seconds

Michael Antwih — Mon, 02 Jan 2017 00:22:14 GMT

Are you able to attach a debugger to your custom board? If so I would suggest running the code via debug mode. You are most likely getting an app / system error. Examining the stack would help determine the last statement, calling function, etc.