// MQTT : Publish our message
void publishMessage()
{
if (mqtt.getConnectionState() != eTCS_Connected) {
startMqttClient(); // Auto reconnect
return;
}
// Read DHT22
TempAndHumidity th;
if(!dht.readTempAndHumidity(th)) {
return;
}
// Make JSON data
String message = "{\"temp\":";
message += th.temp;
message += ", \"humi\":";
message += th.humid;
message += "}";
// publish message
Serial.println("Let's publish message now!");
mqtt.publish("home/thirdroom/temp_humi", message, true); // retained message
displayTemp(message);
}
void HomeScreen::displayTemp() {
#if DBG
Serial.print("HomeScreen::displayTemp: ");
Serial.println(tNow);
#endif
float temp = readTemp(TEMP_F);
displayTemp(TEMP_F, temp);
}
void HomeScreen::display() {
lcd.clear();
lcd.noBlink();
lcd.noCursor();
displayHeader();
displayDateTime();
displayTemp();
}
void HomeScreen::loop(unsigned long tNow) {
#if DBG
Serial.print("HomeScreen::loop: ");
Serial.println(tNow);
#endif
if (tLastDateTime == 0 || tNow - tLastDateTime > LOOP_UPDATE_INTERVAL) {
displayDateTime();
tLastDateTime = tNow;
}
if (tLastTemp == 0 || tNow - tLastTemp > (LOOP_UPDATE_INTERVAL * 10)) {
displayTemp();
tLastTemp = tNow;
}
}
void loop()
{
buttonSense(); //check to see if the button is pressed
blinkLED(); //blink the LEDs to a predetermined pattern
delay(1000); //pause for 1 second
readADCvalue = analogRead(138); //get the raw ADC data. Must use "pin" 138 due to backend coding located in pins_energia.h
//below formulas were taken from the MSP430 user guide for calibrating internal temp sensor
cal_1 = t85 - t30;
cal_2 = 85-30;
cal_3 = cal_1 / cal_2;
cal_4 = readADCvalue - t30;
cal_5 = cal_3 * cal_4;
cal_6 = cal_5 + 30; //final temp result in degC
displayTemp(cal_6, mode); //pass temp info and mode info to be displayed on LEDs
delay(1000); //pause for 1 second
}
double PIDControl::reflowPID(double setTempPoint, double setTimePoint, unsigned long windowStartTime)
{
_val=analogRead(sensePin);
currTemp = _val * 0.00489 / 0.005; //Converting the voltage of sensePin to current temp.
displayTemp(currTemp,setTempPoint);
myPID.Compute();
Serial.println(Output);
return Output;
_now = millis();
if((_now - windowStartTime)/1000 > setTimePoint)
{ //time to shift the Reflow Window
windowStartTime += setTimePoint;
}
if (Output > (_now - windowStartTime)/1000)
{
digitalWrite(heaterPin,HIGH);
}
else digitalWrite(heaterPin,LOW);
}
void tempSensor()
{
//Initialize the ADC Module
/*
* Base Address for the ADC Module
* Use Timer trigger 1 as sample/hold signal to start conversion
* USE MODOSC 5MHZ Digital Oscillator as clock source
* Use default clock divider of 1
*/
ADC_init(ADC_BASE,
ADC_SAMPLEHOLDSOURCE_2,
ADC_CLOCKSOURCE_ADCOSC,
ADC_CLOCKDIVIDER_1);
ADC_enable(ADC_BASE);
//Configure Memory Buffer
/*
* Base Address for the ADC Module
* Use input A12 Temp Sensor
* Use positive reference of Internally generated Vref
* Use negative reference of AVss
*/
ADC_configureMemory(ADC_BASE,
ADC_INPUT_TEMPSENSOR,
ADC_VREFPOS_INT,
ADC_VREFNEG_AVSS);
ADC_clearInterrupt(ADC_BASE,
ADC_COMPLETED_INTERRUPT);
// Enable the Memory Buffer Interrupt
ADC_enableInterrupt(ADC_BASE,
ADC_COMPLETED_INTERRUPT);
ADC_startConversion(ADC_BASE,
ADC_REPEATED_SINGLECHANNEL);
// Enable internal reference and temperature sensor
PMM_enableInternalReference();
PMM_enableTempSensor();
// TimerA1.1 (125ms ON-period) - ADC conversion trigger signal
Timer_A_initUpMode(TIMER_A1_BASE, &initUpParam_A1);
//Initialize compare mode to generate PWM1
Timer_A_initCompareMode(TIMER_A1_BASE, &initCompParam);
// Start timer A1 in up mode
Timer_A_startCounter(TIMER_A1_BASE,
TIMER_A_UP_MODE
);
// Delay for reference settling
__delay_cycles(300000);
//Enter LPM3.5 mode with interrupts enabled
while(*tempSensorRunning)
{
__bis_SR_register(LPM3_bits | GIE); // LPM3 with interrupts enabled
__no_operation(); // Only for debugger
if (*tempSensorRunning)
{
// Turn LED1 on when waking up to calculate temperature and update display
P1OUT |= BIT0;
// Calculate Temperature in degree C and F
signed short temp = (ADCMEM0 - CALADC_15V_30C);
*degC = ((long)temp * 10 * (85-30) * 10)/((CALADC_15V_85C-CALADC_15V_30C)*10) + 300;
*degF = (*degC) * 9 / 5 + 320;
// Update temperature on LCD
displayTemp();
P1OUT &= ~BIT0;
}
}
// Loop in LPM3 to while buttons are held down and debounce timer is running
while(TA0CTL & MC__UP)
{
__bis_SR_register(LPM3_bits | GIE); // Enter LPM3
__no_operation();
}
if (*mode == TEMPSENSOR_MODE)
{
// Disable ADC, TimerA1, Internal Ref and Temp used by TempSensor Mode
ADC_disableConversions(ADC_BASE,ADC_COMPLETECONVERSION);
ADC_disable(ADC_BASE);
Timer_A_stop(TIMER_A1_BASE);
PMM_disableInternalReference();
PMM_disableTempSensor();
PMM_turnOffRegulator();
__bis_SR_register(LPM4_bits | GIE); // re-enter LPM3.5
__no_operation();
}
}