How to send data with redbear nano V2?


Hello I tried to send data with redbear nano V2, currently I succeded to launch tx rx example with nRF connect app. I can found and connect the redbear nano v2 but I’m very nooby with arduino and BLE, there is no simple example to test data transfert. I search to simply send data from ble nano v2 to my android phone. My simple final goal is to increase a counter when I press an input button from the ble nano, and send data to the phone when ble nano is connect. thank you


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