145 lines
3.8 KiB
Plaintext
145 lines
3.8 KiB
Plaintext
#include <OneWire.h>
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#include <DallasTemperature.h>
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// Data wire is plugged into port 2 on the Arduino
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#define ONE_WIRE_BUS 2
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// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
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OneWire oneWire(ONE_WIRE_BUS);
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// Pass our oneWire reference to Dallas Temperature.
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DallasTemperature sensors(&oneWire);
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// arrays to hold device addresses
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DeviceAddress insideThermometer, outsideThermometer;
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// function that will be called when an alarm condition exists during DallasTemperatures::processAlarms();
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void newAlarmHandler(uint8_t* deviceAddress)
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{
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Serial.println("Alarm Handler Start");
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printAlarmInfo(deviceAddress);
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printTemp(deviceAddress);
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Serial.println();
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Serial.println("Alarm Handler Finish");
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}
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void printCurrentTemp(DeviceAddress deviceAddress)
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{
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printAddress(deviceAddress);
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printTemp(deviceAddress);
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Serial.println();
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}
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void printAddress(DeviceAddress deviceAddress)
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{
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Serial.print("Address: ");
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for (uint8_t i = 0; i < 8; i++)
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{
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if (deviceAddress[i] < 16) Serial.print("0");
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Serial.print(deviceAddress[i], HEX);
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}
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Serial.print(" ");
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}
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void printTemp(DeviceAddress deviceAddress)
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{
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float tempC = sensors.getTempC(deviceAddress);
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if (tempC != DEVICE_DISCONNECTED)
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{
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Serial.print("Current Temp C: ");
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Serial.print(tempC);
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}
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else Serial.print("DEVICE DISCONNECTED");
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Serial.print(" ");
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}
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void printAlarmInfo(DeviceAddress deviceAddress)
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{
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char temp;
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printAddress(deviceAddress);
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temp = sensors.getHighAlarmTemp(deviceAddress);
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Serial.print("High Alarm: ");
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Serial.print(temp, DEC);
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Serial.print("C");
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Serial.print(" Low Alarm: ");
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temp = sensors.getLowAlarmTemp(deviceAddress);
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Serial.print(temp, DEC);
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Serial.print("C");
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Serial.print(" ");
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}
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void setup(void)
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{
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// start serial port
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Serial.begin(9600);
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Serial.println("Dallas Temperature IC Control Library Demo");
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// Start up the library
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sensors.begin();
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// locate devices on the bus
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Serial.print("Found ");
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Serial.print(sensors.getDeviceCount(), DEC);
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Serial.println(" devices.");
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// search for devices on the bus and assign based on an index
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if (!sensors.getAddress(insideThermometer, 0)) Serial.println("Unable to find address for Device 0");
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if (!sensors.getAddress(outsideThermometer, 1)) Serial.println("Unable to find address for Device 1");
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Serial.print("Device insideThermometer ");
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printAlarmInfo(insideThermometer);
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Serial.println();
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Serial.print("Device outsideThermometer ");
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printAlarmInfo(outsideThermometer);
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Serial.println();
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// set alarm ranges
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Serial.println("Setting alarm temps...");
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sensors.setHighAlarmTemp(insideThermometer, 26);
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sensors.setLowAlarmTemp(insideThermometer, 22);
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sensors.setHighAlarmTemp(outsideThermometer, 25);
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sensors.setLowAlarmTemp(outsideThermometer, 21);
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Serial.print("New insideThermometer ");
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printAlarmInfo(insideThermometer);
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Serial.println();
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Serial.print("New outsideThermometer ");
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printAlarmInfo(outsideThermometer);
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Serial.println();
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// attach alarm handler
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sensors.setAlarmHandler(&newAlarmHandler);
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}
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void loop(void)
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{
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// ask the devices to measure the temperature
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sensors.requestTemperatures();
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// if an alarm condition exists as a result of the most recent
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// requestTemperatures() request, it exists until the next time
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// requestTemperatures() is called AND there isn't an alarm condition
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// on the device
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if (sensors.hasAlarm())
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{
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Serial.println("Oh noes! There is at least one alarm on the bus.");
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}
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// call alarm handler function defined by sensors.setAlarmHandler
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// for each device reporting an alarm
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sensors.processAlarms();
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if (!sensors.hasAlarm())
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{
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// just print out the current temperature
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printCurrentTemp(insideThermometer);
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printCurrentTemp(outsideThermometer);
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}
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delay(1000);
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}
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