Wow this will come in handy when I get around to configuring the Imp to send I2C commands to the Adafruit 8×8 LED matrix backpack. Hopefully I can map the LED addresses easily so I can make an icon library to drive the matrix. Continue reading I2C protocol for LED matrix
Tag: GPIO
i2c bus error with LED marix on RasPi
This is mostly for myself but I figured I would post it here as well. After putting together and setting up my new 8×8 bi-color LED matrix and i2c control PCB from Adafruit, I got a script error saying “Error accessing 0x70: Check your I2C address”. When I run sudo i2cdetect -y 0, I get nothing, but the matrix is detected when I run sudo i2cdetect -y 1.