#include <SPI.h> #include <Wire.h> #include <Adafruit_GFX.h> #include <Adafruit_SSD1306.h> //Personal Library edited to correct display resolution #include "rfwLogo" //file to show logo #define LETTER_ARRAY 12 //Array Size enum {PASS, FAIL_NOTCONNECTED, FAIL_WRONGCONNECTED, FAIL_SHORTENED }; int …

Arduino not sensing Optocoupler Signal

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