119 lines
2.9 KiB
Plaintext
119 lines
2.9 KiB
Plaintext
/*
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Send the DHT11 Measured Temperature via MQTT
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*/
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#include <Arduino.h>
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#include <WiFi.h>
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#include <PubSubClient.h>
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#include <ArduinoJson.h>
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#include "DHTesp.h"
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// Update these with values suitable for your network.
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const char* ssid = "JoNelsDarlings";
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const char* password = "Paris2016";
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const char* mqtt_server = "mqtt.ddns.kawomi.com";
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DHTesp dht;
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WiFiClient espClient;
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PubSubClient client(espClient);
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unsigned long lastMsg = 0;
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#define MSG_BUFFER_SIZE (50)
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char msg[MSG_BUFFER_SIZE];
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void setup_wifi() {
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delay(10);
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// We start by connecting to a WiFi network
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Serial.println();
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Serial.print("Connecting to ");
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Serial.println(ssid);
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WiFi.mode(WIFI_STA);
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WiFi.begin(ssid, password);
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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randomSeed(micros());
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Serial.println("");
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Serial.println("WiFi connected");
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Serial.println("IP address: ");
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Serial.println(WiFi.localIP());
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}
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void reconnect() {
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// Loop until we're reconnected
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while (!client.connected()) {
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Serial.print("Attempting MQTT connection...");
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// Create a random client ID
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String clientId = "ESP32Client-";
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clientId += String(random(0xffff), HEX);
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// Attempt to connect
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if (client.connect(clientId.c_str())) {
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Serial.println("MQTT connected");
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// Once connected, publish an announcement...
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} else {
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Serial.print("MQTT failed, rc=");
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Serial.print(client.state());
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Serial.println(" try again in 5 seconds");
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// Wait 5 seconds before retrying
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delay(5000);
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}
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}
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}
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void setup() {
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pinMode(BUILTIN_LED, OUTPUT); // Initialize the BUILTIN_LED pin as an output
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Serial.begin(115200);
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setup_wifi();
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dht.setup(5, DHTesp::DHT11);
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client.setServer(mqtt_server, 1883);
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// client.setCallback(callback);
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}
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void loop() {
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if (!client.connected()) {
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reconnect();
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}
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client.loop();
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delay(5000);
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digitalWrite(BUILTIN_LED,HIGH);
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delay(1000);
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digitalWrite(BUILTIN_LED,LOW);
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float humidity = dht.getHumidity();
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float temperature = dht.getTemperature();
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const char* status=dht.getStatusString();
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if (strcmp(status,"OK") == 0) {
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// allocate the memory for the document
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const size_t CAPACITY = JSON_OBJECT_SIZE(3);
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StaticJsonDocument<CAPACITY> doc;
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// create an object
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JsonObject object = doc.to<JsonObject>();
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object["temperatureCelsius"] = temperature;
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object["temperatureFarenheit"] = dht.toFahrenheit(temperature);
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object["humidity"] = humidity;
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// serialize the object and send the result to Serial
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static char sensorStatus[150];
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serializeJson(doc, sensorStatus);
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Serial.println(sensorStatus);
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client.publish("Outside/Weather", sensorStatus);
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} else {
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Serial.print("Error Reading Temp. ");
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Serial.println(status);
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}
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}
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