Adafruit Bluefruit LE SPI Friend - Bluetooth Low Energy (BLE) SF_RFID Tags GET_INPUT can only work with

GET_INPUT can only work with a single channel

See the technical section of the User Guide for details

or you can make it use an adaptive brightness mode

nl/%7Edicks/avr/usbtiny/index

while the negative potential means that solution shows a certain degree of reduction

Adafruit Bluefruit LE SPI Friend - Bluetooth Low Energy (BLE) SF_RFID Tags GET_INPUT can only work withWould you like to add powerful and easy to use Bluetooth Low Energy to your robot, art or other electronics project? Heck yeah! With BLE now included in modern smart phones and tablets, its fun to add wireless connectivity. So what you really need is the new Adafruit Bluefruit LE SPI Friend! The Bluefruit LE SPI Friend makes it easy to add Bluetooth Low Energy connectivity to anything with 4 or 5 GPIO pins. With SPI, you don't have to worry about baud