st-anything/lib/ST_Anything_AdafruitThermocouple/PS_AdafruitThermocouple.cpp

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//******************************************************************************************
// File: PS_AdafruitThermocouple.cpp
// Authors: Dan G Ogorchock
//
// Summary: PS_AdafruitThermocouple is a class which implements the SmartThings "Temperature Measurement"
// device capability.
// It inherits from the st::PollingSensor class. The current version uses a digital input to measure the
// temperature Adafruit MAX31855 series thermocouple sensor.
//
// Create an instance of this class in your sketch's global variable section
// For Example: st::PS_AdafruitThermocouple sensor1(F("temperature1"), 120, 3, PIN_SCLK, PIN_CS, PIN_MISO);
//
// st::PS_TemperatureHumidity() constructor requires the following arguments
// - String &name - REQUIRED - the name of the object - must match the Groovy ST_Anything DeviceType tile name
// - long interval - REQUIRED - the polling interval in seconds
// - long offset - REQUIRED - the polling interval offset in seconds - used to prevent all polling sensors from executing at the same time
// - int8_t pinSCLK - REQUIRED - the Arduino Pin to be used as the MAX31855 SCLK
// - int8_t pinCS - REQUIRED - the Arduino Pin to be used as the MAX31855 CS
// - int8_t pinMISO - REQUIRED - the Arduino Pin to be used as the MAX31855 MISO
//
// This class supports receiving configuration data from the SmartThings cloud via the ST App. A user preference
// can be configured in your phone's ST App, and then the "Configure" tile will send the data for all sensors to
// the ST Shield. For PollingSensors, this data is handled in the beSMart() function.
//
// TODO: Determine a method to persist the ST Cloud's Polling Interval data
//
// Change History:
//
// Date Who What
// ---- --- ----
// 2015-03-24 Dan Ogorchock Original Creation
// 2018-08-30 Dan Ogorchock Modified comment section above to comply with new Parent/Child Device Handler requirements
// 2019-06-24 Dan Ogorchock Improved false reading handling
//
//
//******************************************************************************************
#include "PS_AdafruitThermocouple.h"
#include "Constants.h"
#include "Everything.h"
#include <SPI.h>
#include <Adafruit_MAX31855.h>
namespace st
{
//private
//public
//constructor - called in your sketch's global variable declaration section
PS_AdafruitThermocouple::PS_AdafruitThermocouple(const __FlashStringHelper *name, unsigned int interval, int offset, int8_t pinSCLK, int8_t pinCS, int8_t pinMISO):
PollingSensor(name, interval, offset),
m_dblTemperatureSensorValue(0.0),
m_Adafruit_MAX31855(Adafruit_MAX31855(pinSCLK, pinCS, pinMISO))
{
}
//destructor
PS_AdafruitThermocouple::~PS_AdafruitThermocouple()
{
}
//SmartThings Shield data handler (receives configuration data from ST - polling interval, and adjusts on the fly)
void PS_AdafruitThermocouple::beSmart(const String &str)
{
String s = str.substring(str.indexOf(' ') + 1);
if (s.toInt() != 0) {
st::PollingSensor::setInterval(s.toInt() * 1000);
if (st::PollingSensor::debug) {
Serial.print(F("PS_AdafruitThermocouple::beSmart set polling interval to "));
Serial.println(s.toInt());
}
}
else {
if (st::PollingSensor::debug)
{
Serial.print(F("PS_AdafruitThermocouple::beSmart cannot convert "));
Serial.print(s);
Serial.println(F(" to an Integer."));
}
}
}
//initialization routine - get first set of readings and send to ST cloud
void PS_AdafruitThermocouple::init()
{
getData();
}
//function to get data from sensor and queue results for transfer to ST Cloud
void PS_AdafruitThermocouple::getData()
{
double tempTemperature;
double totalTemperature = 0.0;
int numGoodValues = 0;
for (int i = 1; i <= 3; i++) {
tempTemperature = m_Adafruit_MAX31855.readFarenheit();
if (isnan(tempTemperature))
{
if (st::PollingSensor::debug) {
Serial.println(F("PS_AdafruitThermocouple:: Error Reading Thermocouple."));
}
}
else
{
totalTemperature = totalTemperature + tempTemperature;
numGoodValues++;
}
}
if (numGoodValues > 0) {
m_dblTemperatureSensorValue = totalTemperature / numGoodValues;
Everything::sendSmartString(getName() + " " + String(int(m_dblTemperatureSensorValue)));
}
else
{
Serial.println(F("PS_AdafruitThermocouple:: Error Reading Thermocouple multiple times. No good value measured this cycle."));
}
}
}