132 lines
3.3 KiB
C++
132 lines
3.3 KiB
C++
#include <Homie.h> // https://github.com/marvinroger/homie-esp8266
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#include <DHT.h> // https://github.com/adafruit/DHT-sensor-library
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#include "DeviceLed.h"
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#include "DeviceLdr.h"
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#define HAS_LDR
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#define HAS_LED
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#undef HAS_DHT
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// HAS_LED
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#define PIN_LED_RED D8
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#define PIN_LED_GREEN D6
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#define PIN_LED_BLUE D7
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DeviceLed deviceLed(PIN_LED_RED, PIN_LED_GREEN, PIN_LED_BLUE);
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// HAS_LDR
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#define PIN_LDR A0
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DeviceLdr deviceLdr(PIN_LDR);
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// HAS_DHT
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#define PIN_DHT D4
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#define TYPE_DHT DHT22
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HomieNode humidityNode("humidity", "humidity");
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HomieNode temperatureNode("temperature", "temperature");
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HomieNode heatindexNode("heatindex", "heatindex");
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const int INTERVAL_DHT = 60;
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unsigned long lastSentDHT = 0;
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DHT dht(PIN_DHT, TYPE_DHT);
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float humidity, temperature; // raw values from the sensor
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float heatindex; // computed value from the sensor
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void setupHandler() {
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#ifdef HAS_LDR
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deviceLdr.setup();
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#endif
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#ifdef HAS_LED
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deviceLed.setup();
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#endif
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#ifdef HAS_DHT
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dht.begin();
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#endif
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}
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// compare float values
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bool isEqual(float a, float b, float epsilon=0.001) {
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return fabs(a - b) <= epsilon * fabs(a);
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}
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void loopHandlerDHT() {
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if (millis() - lastSentDHT >= INTERVAL_DHT * 1000UL || lastSentDHT == 0) {
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float previousHumidity = humidity;
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float previousTemperature = temperature;
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float previousHeatindex = heatindex;
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humidity = dht.readHumidity(); // read humidity as a percent
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temperature = dht.readTemperature(); // read temperature as Celsius
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heatindex = dht.computeHeatIndex(temperature, humidity, false);
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// check if any reads failed and exit early
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if (isnan(humidity) || isnan(temperature)) {
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Serial.println("Failed to read from DHT sensor!");
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return;
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}
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if (!isEqual(humidity, previousHumidity)) {
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Serial.print("humidity: ");
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Serial.println(humidity);
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if (!Homie.setNodeProperty(humidityNode, "value", String(humidity), true)) {
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Serial.println("Sending failed");
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}
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} else {
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Serial.println("humidity unchanged");
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}
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if (!isEqual(temperature, previousTemperature)) {
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Serial.print("temperature: ");
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Serial.println(temperature);
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if (!Homie.setNodeProperty(temperatureNode, "value", String(temperature), true)) {
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Serial.println("Sending failed");
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}
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} else {
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Serial.println("temperature unchanged");
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}
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if (!isEqual(heatindex, previousHeatindex)) {
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Serial.print("heatindex: ");
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Serial.println(heatindex);
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if (!Homie.setNodeProperty(heatindexNode, "value", String(heatindex), true)) {
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Serial.println("Sending failed");
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}
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} else {
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Serial.println("heatindex unchanged");
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}
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lastSentDHT = millis();
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}
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}
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void loopHandler() {
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#ifdef HAS_LDR
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deviceLdr.loop();
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#endif
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#ifdef HAS_LED
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deviceLed.loop();
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#endif
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#ifdef HAS_DHT
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loopHandlerDHT();
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#endif
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}
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void setup() {
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Homie.setFirmware("things", "1.0.0");
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#ifdef HAS_LDR
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deviceLdr.homieRegister();
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#endif
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#ifdef HAS_LED
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deviceLed.homieRegister();
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#endif
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#ifdef HAS_DHT
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Homie.registerNode(humidityNode);
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Homie.registerNode(temperatureNode);
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Homie.registerNode(heatindexNode);
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#endif
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Homie.setSetupFunction(setupHandler);
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Homie.setLoopFunction(loopHandler);
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Homie.setup();
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}
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void loop() {
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Homie.loop();
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}
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