I'm currently working on a project where I aim to wirelessly read ECG data from an Arduino AD8232 Heart Monitor and display it in an Android app created via MIT App Inventor.
For the hardware, I'm using an Arduino Nano RP2040 Connect to collect data from the heart monitor. The data is then transmitted via the internal Bluetooth module in the Nano Arduino to the MIT App Inventor application. I've attached both the Arduino code and the MIT App Inventor code.
The Arduino code and the MIT App code seem to be functioning correctly—I can initiate the app on an Android device (currently using a USB connection), scan for available Bluetooth devices, and select the device with the address "c8:c9:a3:e5:e9:e2:ArduinoNanoRP2040," which matches my Arduino Nano. However, I'm encountering an issue where the
sensorValue from the Arduino isn't showing up on the app.
I've tried various solutions found through Google searches, such as checking if the
serviceUuid and/or the
characteristicUuid match my Arduino code, but unfortunately, nothing has worked so far.
It's worth noting that I'm using the BluetoothBLE extension as it's the only one that has allowed me to connect with the Bluetooth of the specific Arduino I'm using.
Could someone please help me understand what might be going wrong in the app code and how to resolve the issue, specifically in displaying the
sensorValue on the app?