// This #include statement was automatically added by the Particle IDE.
#include "adafruit-max31855/adafruit-max31855.h"
int oshLogoLedPin = D7;
// Memory...
int eepromAddress = 0x50;
#include "math.h"
int thermoCLK = A3;
int thermoCS = A2; // selectable
int thermoDO = A4;
AdafruitMAX31855 thermocouple(thermoCS); //hardware mode
bool hasProbe = false;
bool isCalibrated = false;
int calibrate(String args);
void setup() {
pinMode(oshLogoLedPin, OUTPUT);
// MAX31855 Thermocouple sensor.
thermocouple.init();
Particle.function("calibrate", calibrate);
Particle.publish("Status", "Thermocouple V0.1.0");
// wait for MAX chip to stabilize and published message to go.
delay(500);
}
void loop() {
digitalWrite(oshLogoLedPin, HIGH);
delay(1000);
String senml = "{e:[";
// Read the thermocouple temperatures.
double internalTemp = thermocouple.readInternal();
if (isnan(internalTemp)) {
Particle.publish("status", "failed to read internal temperature.");
} else {
senml+="{'n':'internal','v':'" + String(internalTemp, DEC) + "'},";
double probeTemperature = thermocouple.readCelsius();
if (isnan(probeTemperature)) {
Particle.publish("status", "No probe detected");
hasProbe = false;
} else {
hasProbe = true;
senml+="{'n':'probe','v':'" + String(probeTemperature, DEC) + "'},";
}
senml +="]}";
Particle.publish("senml", senml, 60, PRIVATE);
}
digitalWrite(oshLogoLedPin, LOW);
// TODO: Sleep to save power.
delay(5000);
// EEPROM TEST
//writeEEPROM(eepromAddress, 1, 127);
//byte read = readEEPROM(eepromAddress, 0);
//byte read1 = readEEPROM(eepromAddress, 1);
//Particle.publish("Status", "Read: " + String(read, DEC) + ", " + String(read1, DEC));
}
// From http://www.hobbytronics.co.uk/arduino-external-eeprom
void writeEEPROM(int deviceaddress, unsigned int eeaddress, byte data )
{
Wire.beginTransmission(deviceaddress);
Wire.write((int)(eeaddress >> 8)); // MSB
Wire.write((int)(eeaddress & 0xFF)); // LSB
Wire.write(data);
Wire.endTransmission();
delay(5);
}
// From http://www.hobbytronics.co.uk/arduino-external-eeprom
byte readEEPROM(int deviceaddress, unsigned int eeaddress )
{
byte rdata = 0xFF;
Wire.beginTransmission(deviceaddress);
Wire.write((int)(eeaddress >> 8)); // MSB
Wire.write((int)(eeaddress & 0xFF)); // LSB
Wire.endTransmission();
Wire.requestFrom(deviceaddress,1);
if (Wire.available()) rdata = Wire.read();
return rdata;
}
// ==================================================================
// Particle functions
// ==================================================================
int calibrate(String args) {
double internalTemp = thermocouple.readInternal();
double probeTemperature = thermocouple.readCelsius();
if (isnan(probeTemperature)) {
Particle.publish("status", "Could not calibrate, no probe detected.");
hasProbe = false;
isCalibrated = false;
return 0;
} else {
// Probe connected, do an initial calibration.
hasProbe = true;
thermocouple.calibrate();
double calibrationValue = thermocouple.readCalibration();
String senml = "{e:[";
senml+="{'n':'internal','v':'" + String(internalTemp, DEC) + "'},";
senml+="{'n':'calibrationValue','v':'" + String(calibrationValue, DEC) + "'},";
senml +="]}";
Particle.publish("senml", senml, 60, PRIVATE);
delay(500);
Particle.publish("status", "Calibrated at " + String(internalTemp, DEC) + "C");
isCalibrated = true;
}
return 1;
}
