connecting nrf52840 toandroid application

[nikola]

Hi,

I am  trying to receive and send data from an android device to an nrf52840 device with USB CDC. 
I have already installed the application using this link https://jimmywongiot.com/2020/04/21/how-to-communicate-with-android-through-usb-interface-on-nrf52820-nrf52833-nrf52840/
but the connection between the card  NRF52840 and the phone is not made
do you have to add the driver of the card in the android code to connect or you have to make other modifications

[awneil]

Are you sure that your Android device supports USB CDC as a Host?