DHT11_NodeMCU

dht_11_nodemcu_Thingspeak.ino

@@ -0,0 +1,133 @@
+
+
+#include "DHT.h"
+
+#include <SoftwareSerial.h>
+
+#define DHTPIN 5                       // Digital Pin 5
+
+#define DHTTYPE DHT11                  // We are Using DHT11
+
+String apiKey = "";    // Edit this API key according to your Account
+
+String Host_Name = "";         // Edit Host_Name
+
+String Password = "";          // Edit Password
+
+SoftwareSerial ser(2, 3);              // RX, TX
+
+int i=1;
+
+DHT dht(DHTPIN, DHTTYPE);              // Initialising Pin and Type of DHT
+
+void setup() {                
+
+Serial.begin(115200);                  // enable software serial
+
+ser.begin(115200);                     // reset ESP8266
+
+ser.println("AT+RST");               // Resetting ESP8266
+
+dht.begin();                        // Enabling DHT11
+
+char inv ='"';
+
+String cmd = "AT+CWJAP";
+
+       cmd+= "=";
+
+       cmd+= inv;
+
+       cmd+= Host_Name;
+
+       cmd+= inv;
+
+       cmd+= ",";
+
+       cmd+= inv;
+
+       cmd+= Password;
+
+       cmd+= inv;
+
+ser.println(cmd);                    // Connecting ESP8266 to your WiFi Router
+
+  }
+
+// the loop 
+
+void loop() {
+
+  int humidity =  dht.readHumidity();             // Reading Humidity Value
+
+  int temperature = dht.readTemperature();        // Reading Temperature Value
+
+  String state1=String(humidity);                 // Converting them to string 
+
+  String state2=String(temperature);              // as to send it through URL
+
+
+
+  String cmd = "AT+CIPSTART=\"TCP\",\"";          // Establishing TCP connection
+
+  cmd += "184.106.153.149";                       // api.thingspeak.com
+
+  cmd += "\",80";                                 // port 80
+
+  ser.println(cmd);
+
+  Serial.println(cmd);
+
+ if(ser.find("Error")){
+
+    Serial.println("AT+CIPSTART error");
+
+    return;
+
+  }
+
+String getStr = "GET /update?api_key=";         // prepare GET string
+
+  getStr += apiKey;
+
+  getStr +="&field1=";
+
+  getStr += String(state1);                       // Humidity Data
+
+  getStr +="&field2=";
+
+  getStr += String(state2);                       // Temperature Data
+
+  getStr += "\r\n\r\n";
+
+  cmd = "AT+CIPSEND=";
+
+  cmd += String(getStr.length());                // Total Length of data
+
+  ser.println(cmd);
+
+  Serial.println(cmd);
+
+
+
+if(ser.find(">")){
+
+    ser.print(getStr);
+
+    Serial.print(getStr);
+
+  }
+
+  else{
+
+    ser.println("AT+CIPCLOSE");                  // closing connection
+
+    // alert user
+
+    Serial.println("AT+CIPCLOSE");
+
+  }
+
+ delay(1000);                                  // Update after every 15 seconds
+
+}