The Blue Phage allows any keyboard that uses an Arduino Pro Micro to be converted into a wireless Bluetooth keyboard.
It is a breakout for the NRF52832 Bluetooth Low Energy microcontroller that is pin-compatible with the Arduino Pro Micro. There are many DIY keyboard designs that utilize the Pro Micro as a controller. Any keyboard that utilizes an Arduino Pro Micro can be made into a Bluetooth keyboard utilizing the BlueMicro firmware. Each board is shipped with a bootloader that allows use with the Arduino NRF52 environment developed by Adafruit. Together with the BlueMicro firmware, a fully programmable custom Bluetooth keyboard is possible with the use of this board.
There is a serial header on one edge of the board. Simply connect the 5 pins (DTR, TX,RX, 3.3V power, and ground) to the serial adapter of your choice. An auto-reset circuit onboard will allow the board to be reprogrammed without any the hassle of messing with reset and bootloader buttons.
This board requires a power supply between 2.4-3.5V. Do not supply a higher voltage than that to the onboard JST footprint or the VCC pins as it may damage the board.
The default version of this board also breaks out two additional GPIO. A smaller version (the purple board show) is available upon request in very limited quantities.
8/8/18: The smaller purple version is currently out of stock.