uint8_t DS18B20::hasAlarm() {
uint8_t oldResolution = selectedResolution;
setResolution(9);
float temp = getTempC();
setResolution(oldResolution);
return ((temp <= selectedScratchpad[ALARM_LOW]) || (temp >= selectedScratchpad[ALARM_HIGH]));
}
// Fetch temperature for device index
float DallasTemperature::getTempCByIndex(uint8_t deviceIndex)
{
DeviceAddress deviceAddress;
if (!getAddress(deviceAddress, deviceIndex))
return DEVICE_DISCONNECTED_C;
return getTempC((uint8_t*)deviceAddress);
}
float Thermistor::getTempF(bool smooth) {
_temp_c = getTempC(smooth);
_temp_f = (_temp_c * 9.0)/ 5.0 + 32.0;
Serial.print("Temp F: ");
Serial.println(_temp_f);
return _temp_f;
}
void LM95172::resetSensor()
{
unsigned int v = 0;
digitalWrite(PIN_CS, LOW);
getTempC();
sendCmd(REG_CTL, READ, v);
digitalWrite(PIN_CS, HIGH);
v = v | (1 << CTRL_SHUT_DOWN); //set shutdown bit;
digitalWrite(PIN_CS, LOW);
getTempC();
sendCmd(REG_CTL, WRITE, v);
delay(100);
digitalWrite(PIN_CS, HIGH);
v = ~(1 << CTRL_SHUT_DOWN) & v; //clear shutdown bit;
digitalWrite(PIN_CS, LOW);
getTempC();
sendCmd(REG_CTL, WRITE, v);
delay(100);
digitalWrite(PIN_CS, HIGH);
}
void LM95172::changeResolution(byte res)
{
unsigned int v = 0;
digitalWrite(PIN_CS, LOW);
getTempC();
sendCmd(REG_CTL, READ, v);
digitalWrite(PIN_CS, HIGH);
v = v & 0xFFC0; //clear the lower 5 bits;
currentResolution = res;
if (res == 13) v = v | RES_13;
else if (res == 14) v = v | RES_14;
else if (res == 15) v = v | RES_15;
else v = v | RES_16;
digitalWrite(PIN_CS, LOW);
getTempC();
sendCmd(REG_CTL, WRITE, v);
digitalWrite(PIN_CS, HIGH);
}
// returns temperature in degrees F
// TODO: - when getTempC returns DEVICE_DISCONNECTED
// -127 gets converted to -196.6 F
float DallasTemperature::getTempF(uint8_t* deviceAddress)
{
return toFahrenheit(getTempC(deviceAddress));
}
// Fetch temperature for device index
float DallasTemperature::getTempCByIndex(uint8_t deviceIndex)
{
DeviceAddress deviceAddress;
getAddress(deviceAddress, deviceIndex);
return getTempC((uint8_t*)deviceAddress);
}
float Thermistor::getTemp(bool smooth) {
return getTempC(smooth);
}
float DS18B20::getTempF() {
return getTempC() * 1.8 + 32;
}
