keychron_qmk_firmware/keyboards/atreus/feather

Bluetreus - a conversion of an Atreus to use a Bluetooth microcontroller

I have created a keymap for this with Bluetooth control on layer 2 so that you can switch the keyboard between auto, USB only, and Bluetooth only. I'm working on fixing turning on auto by default, but have still not succeeded.

To build it and flash it, do:

make atreus/feather:clash:flash

Wiring it up

Physically, SDA to pin 13 on the new board are connected to what 9-1 were connected to on the old board. Pin 0 from the old board is brought over to the other side with a jumper wire to pin a2. TX, RX, A5, A4, A3 on the new board connect to what a0 to 12 connected to on the old board. GND attaches to g. You have to bend some of the pins at about a 45 degree angle to make them line up. Here's a side view of what the most bent pins look like: Here's a top view, USB port down, wireless antenna up. Note: the USB port orientation is opposite what it used to be.

New board:

This is an Adafruit Feather BLE

QMK	Screen Print	Feather	SCREEN	QMK REF
D1	SDA	RADIO	dfu
D0	SCL		1/TX	D3
C6	5		0/RX	D2
D7	6		MISO	B3/Blue
B5	9		MOSI	B2/Blue
B6	10		SCK	B1/Blue
B7	11		A5	F0
D6	12		a4	F1
C7	13		a3	F4
	usb		a2	F5
	e0		a1	F6
	bat		a0
	Battery		GND
	Connector		ARf
				USB PORT
	v v		RST

Old board:

This is an A Star, non-flipped

QMK	Scrn	A	Scrn	QMK
b5	9	USB	a0	F7
b4	8	port	a1	F6
e6	7		10	B6
d7	6		11	B7
c6	5		12	D6
d4	4		rst	RST
d0	3		3v	x
d1	2		5v	x
d3	1		g	G
d2	0		v	x