delay(20);
Wire.requestFrom(address, readCount);
delay(10);
int nBytes = Wire.available();
byte buff[nBytes];
int i = 0;
while (Wire.peek() != -1) {
buff[i] = Wire.read();
Serial.print(buff[i],HEX);
Serial.print(" ");
i++;
}
//Serial.write(buff, nBytes);
Serial.print('\n');
int co2 = (buff[0] << 8) | buff[1];
Serial.print("CO2 Concentration: ");
Serial.print(co2);
Serial.print("\n");
}
void getAllAddress() {
//Serial.println("Looking for addresses");
byte error, address;
for (address = 1; address < 128; address++) {
Wire.beginTransmission(address);
error = Wire.endTransmission();
delay(5);
if (error == 0) {
Serial.print(address, HEX);
Serial.print(" ");
}
}
}
void loop() {
// put your main code here, to run repeatedly:
while (Serial.available() == 0) { }
//Delay 10ms to ensure we get the whole message
delay(10);
int serialBufferSize = Serial.available();
byte buff[serialBufferSize];
int i = 0;
while (Serial.peek() != -1 && i < serialBufferSize) {
buff[i] = (byte)Serial.read();
i++;
}
char command = (char)buff[0];
if (command == FIND_ADDRESS) {
getAllAddress();
} else if (command == READ_CO2) {
//The LSB nibble of the second byte contains the number of data bytes being read
//Add 2 for the Command byte and Checksum
int bufferSize = 1;
int readCount = 2;
sendDataAndReadToAddress(0x06, address, bufferSize, readCount);
} else {
Serial.println("Invalid Command... Type F to find all devices on I2C bus and type R to read CO2 from S-11");
}
}
