Android App Development for ItsyBitsy nRF52840

[Tsan Sum Lee]

Hi, I am quite new to App development with Android Studio. My project is to make an app plotting the data collected from one of the pins of ItsyBitsy nRF52840. I found an official open sourced app provided by Nordic called Blinky which is specifically for nRF52840 DK and tested it on an android phone, but it couldn't find my microcontroller. I wonder what kind of content of the app I need to modify that can enable the app to detect and connect to my board. I also want to modify it a bit to have a similar feature as Plotter from Bluefruit Connect. May I have your guidance and instruction? I am overwhelmed by the complexity.   

https://github.com/NordicSemiconductor/Android-nRF-Blinky

https://learn.adafruit.com/adafruit-itsybitsy-nrf52840-express

[Simon]

Are you using NCS or the nRF5 SDK?

In case of NCS, program this sample to the nRF52840: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/1.9.0/nrf/samples/bluetooth/peripheral_lbs/README.html

If you use the NRF5 SDK, program this sample to the nRF52840: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fsdk_nrf5_v17.1.0%2Fble_sdk_app_blinky.html&cp=8_1_4_2_2_3 

I think both of these will include the Service LED UUID in the adv. packet, such that it won't get filtered out by the app.

I'm not very familiar with the blinky app or Android java development, but I guess the filtering happens here: https://github.com/NordicSemiconductor/Android-nRF-Blinky/blob/4fbaa610fd1c088376818a4176b46a6ef63af5ae/app/src/main/java/no/nordicsemi/android/blinky/viewmodels/DevicesLiveData.java#L45 

Best regards,

Simon