60 lines
1.8 KiB
Arduino
60 lines
1.8 KiB
Arduino
#include <Sleep_n0m1.h>
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#include <SPI.h>
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#include <EEPROM.h>
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#include <DallasTemperature.h>
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#include <OneWire.h>
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#include <RF24.h>
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#include <Sensor.h>
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#define ONE_WIRE_BUS 3 // Pin where dallase sensor is connected
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#define MAX_ATTACHED_DS18B20 16
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unsigned long SLEEP_TIME = 30; // Sleep time between reads (in seconds)
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OneWire oneWire(ONE_WIRE_BUS);
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DallasTemperature sensors(&oneWire);
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Sensor gw;
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Sleep sleep;
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float lastTemperature[MAX_ATTACHED_DS18B20];
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int numSensors=0;
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boolean metric = true;
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void setup()
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{
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sensors.begin();
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gw.begin();
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// Fetch the number of attached sensors
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numSensors = sensors.getDeviceCount();
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// Register all sensors to gw (they will be created as child devices)
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for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {
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gw.sendSensorPresentation(i, S_TEMP);
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}
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metric = gw.isMetricSystem();
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}
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void loop()
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{
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gw.powerUp();
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sensors.requestTemperatures(); // Fetch temperatures from Dallas
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delay(100);
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for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {
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// Fetch and round temperature to one decimal
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float temperature = static_cast<float>(static_cast<int>((metric?sensors.getTempCByIndex(i):sensors.getTempFByIndex(i)) * 10.)) / 10.;
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// Only send data if temperature has changed and no error
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if (lastTemperature[i] != temperature && temperature != -127.00) {
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gw.powerUp(); // Powerup introduces a small delay (which is missing in radio.write powerup)
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// Send variable (using registered shortcut) to gw
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gw.sendVariable(i, V_TEMP, temperature, 1);
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lastTemperature[i]=temperature;
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}
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}
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// Power down the radio. Note that the radio will get powered back up
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// on the next write() call.
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delay(500);
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gw.powerDown();
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sleep.pwrDownMode(); //set sleep mode
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sleep.sleepDelay(SLEEP_TIME * 1000); //sleep for: sleepTime
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}
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