[SOLVED] Bitwise and Arduino

Projects Programming
6

The guys above are right. This works:

void loop() {
  state = GROUP_0;
  if ( (state & 0xF0) == GROUP_0 )
    Serial.println("Never printed for GROUP_0");

  state = CHILD_0;
  if ( (state & 0xF0) == GROUP_0 )
    Serial.println("Never printed for CHILD_0");

  state = CHILD_1;
  if ( (state & 0xF0) == GROUP_0 )
    Serial.println("Never printed for CHILD_1");
    
  delay(1000);
}

See: Operators in C and C++ - Wikipedia

The == operator has higher precedence than the & operator.