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edited Dec 12, 2018 at 17:35

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There are ways to mask off the don't care bits. Say your example, 0b11xx1111. Then

incomingByte = Serial.read();
incomingByte = incomingByte || 0b00110000;  // make 4, 5 high
if (incomingByte === 0b11111111){ 
// got all 1s, do something 
}
else {
 // some 0s received, do something else
}

There are ways to mask off the don't care bits. Say your example, 0b11xx1111. Then

incomingByte = Serial.read();
incomingByte = incomingByte || 0b00110000;  // make 4, 5 high
if (incomingByte = 0b11111111){ 
// got all 1s, do something 
}
else {
 // some 0s received, do something else
}

There are ways to mask off the don't care bits. Say your example, 0b11xx1111. Then

incomingByte = Serial.read();
incomingByte = incomingByte || 0b00110000;  // make 4, 5 high
if (incomingByte == 0b11111111){ 
// got all 1s, do something 
}
else {
 // some 0s received, do something else
}

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answered Dec 12, 2018 at 15:38

CrossRoads

2.4k
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There are ways to mask off the don't care bits. Say your example, 0b11xx1111. Then

incomingByte = Serial.read();
incomingByte = incomingByte || 0b00110000;  // make 4, 5 high
if (incomingByte = 0b11111111){ 
// got all 1s, do something 
}
else {
 // some 0s received, do something else
}