nrf52840 ble disconnection issue

[EVOV Solutions]

Hi,

I have a medical device where my mother board has a NRF52840 chip which communicates with a Android Tablet through blue-tooth. We find it gets connected with few tablets & not with others. Following problems we see - 1) Getting connected through serial terminal manually & thereafter remains connected, 2) In other cases it connects and disconnects after say 20seconds

Can you suggest some solution for this?

Also, as my device runs on continuous main power, I want to run NR52840 on Class blue tooth...Is it possible to run it on classic blue tooth to maintain connectivity?

[Simonr]

What tablets exactly are these, do they support BLE, and what version of BLE do they support, the nRF52840 might use features that aren't supported by your tablets? What SDK and SDK version have you built your nRF52840 project in? What exactly is the disconnect reason reported from the tablets and/or from the nRF52840?

Best regards,

Simon

[EVOV Solutions]

All these Tablets have BLE4.0 & above. I have already explained observation of BLE disconnection there is nothing more to add from our side.