Datasheet

Instead of taking up a bunch of GPIO pins to read the

buttons and joystick, as well as controlling the TFT

backlight, we use an I2C expander chip called the

seesaw. It is connected to the SDA/SCL pins and can

read/write pins with our library. This saves a ton of pins

and then you can always use the I2C pins for other

sensors, as long as the address doesnt conflict

Don't forget! Since the seesaw chip is used for the TFT

backlight and reset, you need to activate it even if you

are not reading the buttons or joystick.