67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
#include <Arduino.h>
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/* Daten:
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* Temperaturbereich -40 bis 125°C
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* Genauigkeit: ± 0,25°C
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* Auflösung: 0,0625°C
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*/
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#include <Wire.h>
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#include "Adafruit_MCP9808.h"
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float valTemp;
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// Create MCP9808 temperature sensor object
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Adafruit_MCP9808 tempsensor = Adafruit_MCP9808();
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bool F_MCP9808;
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char Temperature[15] = {0};
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void init_MCP9808(){
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F_MCP9808 = true;
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// Make sure the sensor is found, you can also pass in a different i2c
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// address with tempsensor.begin(0x19) for example, also can be left in blank for default address use
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// Also there is a table with all addres possible for this sensor, you can connect multiple sensors
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// to the same i2c bus, just configure each sensor with a different address and define multiple objects for that
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// A2 A1 A0 address
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// 0 0 0 0x18 this is the default address
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// 0 0 1 0x19
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// 0 1 0 0x1A
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// 0 1 1 0x1B
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// 1 0 0 0x1C
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// 1 0 1 0x1D
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// 1 1 0 0x1E
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// 1 1 1 0x1F
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if (!tempsensor.begin(0x18)) {
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Serial.println("Couldn't find MCP9808! Check your connections and verify the address is correct.");
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SystemStatus = SystemStatus | MCP9808noReady;
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F_MCP9808 = false;
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}
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Serial.println("Found MCP9808!");
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tempsensor.setResolution(3); // sets the resolution mode of reading, the modes are defined in the table bellow:
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// Mode Resolution SampleTime
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// 0 0.5°C 30 ms
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// 1 0.25°C 65 ms
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// 2 0.125°C 130 ms
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// 3 0.0625°C 250 ms
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}
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float getTemperature_MCP9808(){
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// Wake up MSP9808 - power consumption ~200 mikro Ampere
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tempsensor.wake();
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float temperature = tempsensor.readTempC();
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tempsensor.shutdown();
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dtostrf(temperature,7,1,Temperature);
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Serial.print("Temperatur (MCP9808):\t");
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Serial.print(Temperature);
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Serial.println(" °C");
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tempsensor.shutdown_wake(1); // shutdown MSP9808 - power consumption ~0.1 mikro Ampere, stops temperature sampling
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return temperature;
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}
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void M2M_Temperatur_MCP9808(String deviceId = "4711") {
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char topic[100];
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dtostrf(valTemp,7,1,Temperature);
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sprintf(topic, "%s%s%s", "hjk/devices/", deviceId.c_str(), "/telemetry/temperature_MCP9808");
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client.publish(topic, Temperature, true);
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} |