Datasheet

int8_t readButtons(void) {
uint16_t reading = analogRead(A3);
//Serial.println(reading);
if (reading > 600) {
return 0; // no buttons pressed
}
if (reading > 400) {
return 4; // button D pressed
}
if (reading > 250) {
return 3; // button C pressed
}
if (reading > 125) {
return 2; // button B pressed
}
return 1; // Button A pressed
}
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