Hacking Why not we try build the loader+bluetooth audio adapter using micro-bit ?

[HheuerZzhang]

We already able to build the in-case dongle, by using Trinket M0.
And NS short on BT adapter for wireless speaker/headphone, there are some typeC BT adpter available on amazon/ebay, request for 20+ $.
With less money, we should able to build our own loader+bluetooth monolithic PCB solution, be modify the micro-bit form BBC.

The technical spec listed below, i am a newbie, not able to finish the work, but I do pretty sure this is a good idea.

43 mm × 52 mm PCB, includes:
Nordic nRF51822 – 16 MHz 32-bit ARM Cortex-M0 microcontroller, 256 KB flash memory, 16 KB static ram, 2.4 GHz Bluetooth low energy wireless networking. The ARM core has the capability to switch between 16 MHz or 32.768 kHz.
NXP/Freescale KL26Z – 48 MHz ARM Cortex-M0+ core microcontroller, that includes a full-speed USB 2.0 On-The-Go (OTG) controller, used as a communication interface between USB and main Nordic microcontroller. This device also performs the voltage regulation from the USB supply (4.5-5.25V) down to the nominal 3.3 volts used by the rest of the PCB. When running on batteries this regulator is not used.
NXP/Freescale MMA8652 – 3-axis accelerometer sensor via I²C-bus.
NXP/Freescale MAG3110 – 3-axis magnetometer sensor via I²C-bus (to act as a compass and metal detector).[10]
MicroUSB connector, battery connector, 23-pin edge connector.
Display consisting of 25 LEDs in a 5×5 array.
Three tactile push buttons (two for user, one for reset).

 

[slaphappygamer]

Sounds nice. I’d love to get wireless headphones through Bluetooth. I’m using that bt transmitter plugged in. Now I’m wired AND wireless. Ha!
Really though, wouldn’t a driver be needed in the os?

 

[HheuerZzhang]

if we soldering and mount the micro-bit pcb inside ,by remove some connectors/button(too thick).
it's no difference than the typeC plug-in BT adaptor.

I can post a link here ......

 

[HheuerZzhang]

anyone can give me a guidance or some useful comments ?
I order the micro:bit, bluetooth dongle and other staffs, from ebay, trying to build a prototype with TypeC plug, if get work, then I will move it inside.