interfrace with BT as a game pad.

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I have some experience with HC-05 and I read about the pirated RN-42 HID Firmware. I'm looking to do something along these lines but would rather just do it right, not to mention the RN-42 HID Firmware is way too limited.  I do not mind how I interface with a chip i2s/isp/etc. but would prefer to use something simple and inexpensive. Using my own protocol would be best if I can find a BT chip that has some kind of HID Firmware built in.

 

So what confuses me, and keep in mind I'm new to BT, is that is seem like just a wireless serial device. In the sense that there is no specific protocol, it just sends characters. The computer must somehow be told it is as HID device, and given some set up data rules, no? In theory, i'd assume I could use the HC-05 alone if I knew these rules. Not that that is my aim here but for understanding it would be nice. That aside, and more to the point, is there not simply some BT chip out there with a built in stack for HID communication? Is there something like LUFA for a BT module like the HC-05?

 

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Look at the nrf5x chips from nordic. There’s also a zillion boards and modules with these devices. A simple entry board is the
Bbc microbit. Note these are BLE (bluetooth low energy)

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The nrf5x is in line with what I'm looking for but a bit more then I need. A quick peak shows many people bugging Nordic about Gamepad support, normally a bad sign... I may have to contact them myself. Any other chips suggestions welcome but I do like Nordic, worked with them before.

Last Edited: Wed. May 15, 2019 - 11:56 AM
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The nRF52832   is actually a non usb module and I may just have to use it.  So nothing in the way of AVR for BT in this manner?