There are multiple selectable I2C addresses. These displays use I2C to communicate, 2 pins are required to This is a library for our I2C LED Backpacksĭesigned specifically to work with the Adafruit LED 7-Segment backpacks Photos attached of my wiring, and also the resulting segments that light up when running the test sketch here (unmodified): adafruit/Adafruit_LED_Backpack/blob/master/examples/sevenseg/sevenseg.ino /*************************************************** I've also tried with a different Arduino and got the exact same result. I've tried re-soldering and I'm fairly happy that I don't have any bad joints.ĭoes anyone have any idea what might cause this? I'm not sure if it's a software thing, or whether the display/backpack could be faulty (or I damaged it somehow during soldering). I've also tried my own sketch and I can't get any other segments to light up.
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