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- #include <ESP8266WiFi.h>
- #include <PubSubClient.h>
- #include "DHT.h"
- DHT dht;
- WiFiClient espClient;
- PubSubClient client(espClient);
- long lastMsg = 0;
- int value = 0;
- const char* ssid = "XXXXXX";
- const char* password = "XXXXX";
- const char* mqtt_server = "XXXXXX";
- String temp_str;
- String hum_str;
- char temp[50];
- char hum[50];
- void setup_wifi() {
- delay(10);
-
- Serial.println();
- Serial.print("Connecting to ");
- Serial.println(ssid);
- WiFi.begin(ssid, password);
- while (WiFi.status() != WL_CONNECTED) {
- delay(500);
- Serial.print(".");
- }
- Serial.println("");
- Serial.println("WiFi connected");
- Serial.println("IP address: ");
- Serial.println(WiFi.localIP());
- }
- void callback(char* topic, byte* payload, unsigned int length) {
- Serial.print("Message arrived [");
- Serial.print(topic);
- Serial.print("] ");
- for (int i = 0; i < length; i++) {
- Serial.print((char)payload[i]);
- }
- Serial.println();
-
- if ((char)payload[0] == '1') {
- digitalWrite(BUILTIN_LED, LOW);
-
-
- } else {
- digitalWrite(BUILTIN_LED, HIGH);
- }
- }
- void reconnect() {
-
- while (!client.connected()) {
- Serial.print("Attempting MQTT connection...");
-
- if (client.connect("ESP8266Client")) {
- Serial.println("connected");
-
- client.publish("outTopic", "hello world");
-
- client.subscribe("inTopic");
- } else {
- Serial.print("failed, rc=");
- Serial.print(client.state());
- Serial.println(" try again in 5 seconds");
-
- delay(5000);
- }
- }
- }
- void setup()
- {
- pinMode(BUILTIN_LED, OUTPUT);
- Serial.begin(115200);
- setup_wifi();
- client.setServer(mqtt_server, 1883);
- client.setCallback(callback);
- Serial.println();
- Serial.println("Status\tHumidity (%)\tTemperature (C)\t(F)");
-
- dht.setup(13);
- }
- void loop()
- {
- if (!client.connected()) {
- reconnect();
- }
- client.loop();
- delay(dht.getMinimumSamplingPeriod());
- float humidity = dht.getHumidity();
- float temperature = dht.getTemperature();
- float ftemp = dht.toFahrenheit(temperature);
- Serial.print(dht.getStatusString());
- Serial.print("\t");
- Serial.print(humidity, 1);
- Serial.print("\t\t");
- Serial.print(temperature, 1);
- Serial.print("\t\t");
- Serial.println(dht.toFahrenheit(temperature), 1);
-
-
- long now = millis();
- if (now - lastMsg > 2000) {
- lastMsg = now;
- ++value;
-
- temp_str = String(ftemp);
- temp_str.toCharArray(temp, temp_str.length() + 1);
- hum_str = String(humidity);
- hum_str.toCharArray(hum, hum_str.length() + 1);
- Serial.print("Publish message: ");
-
- client.publish("Workshop Temperature", temp);
- client.publish("Workshop Humidity", hum);
- }
- }
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