782 B
Working is as follows:
first is to instantiate a constructor:
#include "MAX31855.h"
const int doPin = 7; const int csPin = 6; const int clPin = 5;
MAX31855 tc(clPin, csPin, doPin);
To get a reading one must call tc.read()
This is the workhorse, it returns the status of the last read which is 0..7 0 = OK bit 0 set = thermocouple open circuit bit 1 set = thermocouple short to GND bit 2 set = thermocouple short to VCC
After a tc.read() you can do tc.getTemperature() and tc.getInternal(). repeated getTemperature() will give the same value until a new tc.read();
The reason for this is that it allows the object to hold its last known temperature. Now one can do:
float last = tc.getTemperature(); tc.read(); float new = tc.getTemperature(); float delta = new - last;