Updated version so that Android versions >12 (API >31) are supported.
A minimal working example showing how to use the Cosinuss° One earbuds with Flutter to obtain heart rate, body temperature, accelerometer and raw PPG data.
Make sure you have Flutter installed as introduced in the Mobile Computing and IoT lecture.
Also make sure flutter_blue_plus is installed.
Currently all the required relevant code is inside the main.dart file (lib > main.dart). You may want to consider moving the BLE connection specific code into a seperate file to organize your final application better. Also this example only includes minimal error handling which you should improve for your final application.
