balkian/iot-dht11-esp8266
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J. Fernando Sánchez 2015-12-07 00:40:33 +01:00
commit 9144780751
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#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();
}