Looking to build a mini keyboard with about 10 keys + a device mimicking a mouse (most probably a mini joystick). Will need to run over BT in order to connect to BT capable PC. The end goal is be able to control a game.
I understand I need a HID profile compatible BT module but from what I can see the RN42 is not well catered for anymore in terms of simple solutions. Truthfully, after days of research I’m lost and in need of direction.
What parts would you recommend for such a project?
For parts, I’d go with something like the SX1509 I/O Expander Breakout. That would allow you to connect up to 64 buttons up in a matrix and use those as your keys.
That connected to a microcontroller like a Pro Mini and a joystick might work for inputs. The only HID capable Bluetooth module we have at the moment is the RN-42 but that might do the trick for you. It’s not going to be simple, but those are the parts I’d use.
You would need to write some software to make everything work. Sadly we don’t have a solution where you just plug parts together and get a working device at the end.