How to convert bool array to byte?

Question

I have following problem: I'm reading 8 bit signal from one Arduino pin and store all informatin in bool array. Now I want to convert this array to single byte in decimal. How to do this?

I've tried this:

bool ID[8] = {0, 0, 0, 0, 0, 0, 1, 1};
int recivedID = int(ID);

and

bool ID[8] = {0, 0, 0, 0, 0, 0, 1, 1};
int recivedID = ID.toInt();

non works.

• aaa: Why save it in a bool array in the first place? You could make a byte and set each bit individually. That will be more efficient.

Answer 1

try with this:

int recivedID = ID[0] | (ID[1] << 1) | (ID[2] << 2) | (ID[3] << 3) | (ID[4] << 4) | (ID[5] << 5) | (ID[6] << 6) | (ID[7] << 7);

which is the same as

int recivedID = 0;
for(int i=0; i<8; i++){
 recivedID |= ID[i] << i;
}

I haven't tested it though.

Answer 2

byte BoolArrayToByte(bool boolArray[8])
{
 byte result = 0; 
 for(int i = 0; i < 8; i++)
 {
 if(boolArray[i])
 {
 result = result | (1 << i);
 }
 }
 return result;
}