EmonPi Temperature Measurement

[glyn.hudson]

@pb66

In fact why don’t we just leave ourselves a little more wriggle room and just use even numbers

#define UNUSED_TEMPERATURE 300
// this value (300C) is sent if no sensor has ever been detected
#define OUTOFRANGE_TEMPERATURE 302
// this value (302C) is sent if the sensor reports < -55C or > +125C
#define BAD_TEMPERATURE 304
// this value (304C) is sent if no sensor is present or the checksum is bad (corrupted data)
// NOTE: The sensor might report 85C if the temperature is retrieved but the sensor has not been commanded

Sure sounds good.

@pb66

We really should try and reach a decision on the rest soon rather than leaving it free-wheeling indefinitely again.

Decision made? Let’s use the above.