9 years ago · 9144780751
commit 9144780751
1 changed files with 177 additions and 0 deletions
--- a/iot-dht11-esp8266.ino
+++ b/iot-dht11-esp8266.ino
@ -0,0 +1,177 @@
+#include <ESP8266WiFi.h>
+#include <WiFiClient.h>
+#include <ESP8266WebServer.h>
+#include <ESP8266mDNS.h>
+#include <EEPROM.h>
+#include <ESP8266HTTPClient.h>
+
+#include <Ticker.h>
+#include <Wire.h> 
+#include <LiquidCrystal_I2C.h>
+
+#include <DHT.h>
+#define DHTTYPE DHT11
+#define DHTPIN  2
+
+DHT dht(DHTPIN, DHTTYPE, 11); // 11 works fine for ESP8266
+
+const char* ssid = "***REMOVED***";
+const char* password = "***REMOVED***";
+MDNSResponder mdns;
+
+ESP8266WebServer server(80);
+LiquidCrystal_I2C lcd(0x27,20,4); 
+
+const int led = 13;
+String tempGlobal = "";
+float temperature;
+float humidity;
+int count = 0;
+
+Ticker flipper;
+
+void apagar() {
+  for (uint8_t i=0; i<server.args(); i++){
+    if(server.argName(i) == "nuevatemperatura"){
+       tempGlobal = server.arg(i);
+    }
+  }
+  lcd.setCursor(0,3);
+  lcd.print("Temperatura: ");
+  lcd.print(tempGlobal);
+   for (int i = 0; i < 2; ++i)
+  {
+      EEPROM.write(i, tempGlobal[i]);
+  }
+   EEPROM.commit();
+  server.send(200, "text/plain", tempGlobal);
+}
+
+void json(){
+  server.send(200, "application/json", "{\"temperature\": " + tempGlobal + "}");
+}
+
+void actualizar(){
+  
+  temperature = NAN;
+//  while (isnan(temperature)){
+
+//
+    temperature = (float) dht.readTemperature(false, true);     // Read temperature as Celsius;  
+//  }
+  
+  humidity = NAN;
+  humidity = (float) dht.readHumidity(true);
+  
+  Serial.print("Temperature (°C): "); 
+  Serial.println(temperature, 2);
+  Serial.print("Humidity: "); 
+  Serial.println(humidity, 2);
+  lcd.setCursor(0, 0);
+  lcd.print("Temperatura: ");
+  lcd.print(temperature);
+  lcd.setCursor(0, 1);
+  lcd.print("Humedad: ");
+  lcd.print(humidity);
+  Serial.print("Read sensor: ");
+  count += 1;
+  if(count>100){
+     HTTPClient http;
+     http.begin("api.thingspeak.com", 80, "/update");
+     http.addHeader("X-THINGSPEAKAPIKEY", "P1U0MJLKTAOL3TCI");
+     int code = http.POST("field1="+String(temperature,2)+"&field2="+String(humidity,2));
+     Serial.print("HTTP code: ");
+     Serial.println(code);
+     count = 0; 
+  }
+
+}
+
+void handleRoot() {
+ 
+
+//  actualizar();
+
+  
+  String message = "<html><body><h1>La temperatura</h1><p>" + String(temperature,0) + "</p><p><h1>La humedad</h1><p>" + String(humidity,2) + "</p> <form action=\"apagar\">   Nueva temperatura:<br> <input type=\"text\" name=\"nuevatemperatura\" value=\""+tempGlobal+"\"> <input type=\"submit\" value=\"Submit\"> </form> </body></html>";
+  server.send(200, "text/html", message);
+}
+
+void handleNotFound(){
+  digitalWrite(led, 1);
+//  String message = "File Not Found\n\n";
+  String message = "URI: ";
+  message += server.uri();
+//  message += "\nMethod: ";
+//  message += (server.method() == HTTP_GET)?"GET":"POST";
+//  message += "\nArguments: ";
+//  message += server.args();
+//  message += "\n";
+//  for (uint8_t i=0; i<server.args(); i++){
+//    message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
+//  }
+  server.send(404, "text/plain", message);
+  lcd.home();
+
+  lcd.print(message);
+  for ( uint i=message.length(); i<20; i++){
+     lcd.print(" ");
+  }
+  digitalWrite(led, 0);
+}
+ 
+void setup(void){
+   EEPROM.begin(512);
+     for (int i = 0; i < 2; ++i)
+    {
+      tempGlobal += char(EEPROM.read(i));
+    }
+  dht.begin();           // initialize temperature sensor
+  lcd.begin();                     
+  lcd.backlight();
+  pinMode(led, OUTPUT);
+  digitalWrite(led, 0);
+  Serial.begin(115200);
+  WiFi.begin(ssid, password);
+  Serial.println("");
+
+  // Wait for connection
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+  Serial.println("");
+  Serial.print("Connected to ");
+  Serial.println(ssid);
+  Serial.print("IP address: ");
+  Serial.println(WiFi.localIP());
+  lcd.setCursor(0, 2);
+  lcd.print("IP: ");
+  lcd.print(WiFi.localIP());
+  lcd.setCursor(0, 3);
+  lcd.print("Guardada: "+tempGlobal);
+  
+  if (mdns.begin("esp8266", WiFi.localIP())) {
+    Serial.println("MDNS responder started");
+  }
+
+  
+  server.on("/", handleRoot);
+  server.on("/apagar", apagar);
+  server.on("/json", json);
+  
+  server.on("/inline", [](){
+    server.send(200, "text/plain", "this works as well");
+  });
+
+  server.onNotFound(handleNotFound);
+  
+  server.begin();
+  Serial.println("HTTP server started");
+//   flipper.attach(5, actualizar);
+}
+ 
+void loop(void){
+  server.handleClient();
+  actualizar();
+}