Domagoj Zecevic
3 years ago
commit
a2cc4eade5
1 changed files with 142 additions and 0 deletions
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#include <DHT.h> |
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#include <ESP8266WiFi.h> |
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#include <PubSubClient.h> |
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// WiFi Info
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const char* ssid = "IoT-Zecevic"; |
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const char* password = "IoTSifra123456!"; |
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//MQTT data
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const char* mqttServer = "192.168.1.11"; |
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const int mqttPort = 1883; |
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const char* mqttUser = "yourMQTTuser"; |
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const char* mqttPassword = "yourMQTTpassword"; |
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WiFiClient espClient; |
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PubSubClient MQTTclient(espClient); |
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// DHT setup
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#define DHTPIN 2 |
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#define DHTTYPE DHT11 |
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DHT dht(DHTPIN, DHTTYPE); |
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// Global Vars
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float global_temp; |
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float global_hym; |
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//update
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long previousMillis = 0; |
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long interval = 60000; //ms
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//Start web server
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WiFiServer server(80); |
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void initWiFi() { |
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WiFi.mode(WIFI_STA); |
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WiFi.begin(ssid, password); |
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Serial.print("Connecting to WiFi .."); |
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while (WiFi.status() != WL_CONNECTED) { |
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Serial.print('.'); |
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delay(1000); |
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} |
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Serial.println(WiFi.localIP()); |
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} |
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void reconect() { |
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while (MQTTclient.connect("ESP32Client", mqttUser, mqttPassword )) { |
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Serial.println("Connecting to MQTT..."); |
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} |
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} |
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// prepare a web page to be send to a client (web browser)
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String prepareHtmlPage() |
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{ |
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String htmlPage; |
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htmlPage.reserve(1024); // prevent ram fragmentation
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htmlPage = F("HTTP/1.1 200 OK\r\n" |
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"Content-Type: text/html\r\n" |
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"Connection: close\r\n" // the connection will be closed after completion of the response
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"Refresh: 5\r\n" // refresh the page automatically every 5 sec
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"\r\n" |
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"<!DOCTYPE HTML>" |
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"<html>"); |
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htmlPage += F("</p>" |
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"<p><b>Temperature:</b> "); |
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htmlPage += global_temp; |
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htmlPage += F("</p>" |
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"<p><b>Humidity:</b> "); |
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htmlPage += global_hym; |
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htmlPage += F("</html>" |
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"\r\n"); |
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return htmlPage; |
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} |
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void setup() { |
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Serial.begin(115200); |
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initWiFi(); |
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dht.begin(); // Start DHT
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server.begin(); |
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Serial.printf("Web server started, open %s in a web browser\n", WiFi.localIP().toString().c_str()); |
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//connect to MQTT
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MQTTclient.setServer(mqttServer, mqttPort); |
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//MQTTclient.setCallback(callback);
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while (!MQTTclient.connected()) { |
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if (MQTTclient.connect("ESP32Client", mqttUser, mqttPassword )) { |
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Serial.println("Connected to mqtt!"); |
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} else { |
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Serial.print("failed with state "); |
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Serial.print(MQTTclient.state()); |
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delay(2000); |
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} |
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} |
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} |
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void loop() { |
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global_temp = dht.readTemperature(); |
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global_hym = dht.readHumidity(); |
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Serial.print("Temperatrure: "); |
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Serial.println(global_temp); |
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Serial.print("Humidity: "); |
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Serial.println(global_hym); |
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unsigned long currentMillis = millis(); |
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if(currentMillis - previousMillis > interval) { |
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previousMillis = currentMillis; |
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if (!MQTTclient.connected()) { |
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WiFi.reconnect(); |
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reconect(); |
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} |
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MQTTclient.publish("my/BedRoom/Temperature", String(global_temp).c_str()); |
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MQTTclient.publish("my/BedRoom/Humidity", String(global_hym).c_str()); |
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} |
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WiFiClient serverClient = server.available(); |
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if (serverClient) |
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{ |
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while (serverClient.connected()) |
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{ |
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// read line by line what the client (web browser) is requesting
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if (serverClient.available()) |
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{ |
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String line = serverClient.readStringUntil('\r'); |
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if (line.length() == 1 && line[0] == '\n') |
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{ |
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serverClient.println(prepareHtmlPage()); |
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break; |
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} |
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} |
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} |
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while (serverClient.available()) { |
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serverClient.read(); |
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} |
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// close the connection:
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serverClient.stop(); |
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} |
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delay(2000); |
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} |
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