I'm new to Arduino, but I'm starting a project where I need an accelerometer to control
a mobile phone app.
So I need Bluetooth. I plan to make a lot of these devices and the RN-42 Bluetooth is too expensive.
I have seen a video showing how a HC-05 can be modified by uploading the RN-42 software to it (so that it is capable of being used as a HID) but this looks complicated.
Are there any better options.... can the ESP32 be used?