Bug with f88 converter (negative values)

[jjvandenberg]

Hi,

I had to changed the type conversion for negative values from the unsigned type BYTE to CHAR to allow the sign (of the float) to traverse to valueHB.

void OpenthermData::f88(float value) {
if (value >= 0) {
valueHB = (byte) value;

float fraction = (value - valueHB);
valueLB = fraction * 256.0;

}
else {
//valueHB = (byte)(value - 1);
valueHB = (char) (value -1) ;
float fraction = (value - valueHB - 1);
Serial.print("Fraction == ");Serial.println(fraction);
valueLB = fraction * 256.0;
}
}

Thanks for the lib, it's great fun to be able to read and set a Chronotherm IV thermostat.