Diff: main.cpp

Revision:

0:0b34b891bf45

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun May 03 09:17:49 2020 +0000
@@ -0,0 +1,212 @@
+#include "mbed.h" 
+#include "DHT.h"
+#include "ESP8266.h"               // Include header file from Author: Antonio Quevedo
+#include "math.h"
+#include <string>
+
+
+#define APIKEY 9QSZ6SX8FLBFM640    //Put "Write key" of your channel in thingspeak.com 
+#define IP "184.106.153.149"       // IP Address of "api.thingspeak.com\"
+#define WIFI_SSID "Repulsive"
+#define WIFI_PASS "319nwest425"
+
+Serial pc(USBTX,USBRX);
+
+ESP8266 esp(PTC17, PTC16, 115200); // baud rate for wifi
+
+char snd[255],rcv[1000],snd_Data[255];           //snd= string used to send command to ESP 8266 wii and  rcv = string used to receive response from ESP8266 wifi module 
+
+void esp_initialize(void); // Function used to initialize ESP8266 wifi module 
+void esp_send(void);       // Function used to connect with thingspeak.com and update channel using ESP8266 wifi module 
+
+//test variable 
+float i=0;
+float j=10;
+float moisture_value = 0.0f; 
+float light_value = 0.0f;
+float h = 0.0f, c = 0.0f;
+
+
+AnalogIn moisture(A0); 
+AnalogIn light(A1);
+DHT sensor(D3, DHT11);
+DigitalOut LED(LED1);
+
+// Motor A connections 
+DigitalOut enA(PTC4);
+DigitalOut in1(PTC2);
+DigitalOut in2(PTC3);
+
+// Motor B connections (Pump)
+DigitalOut enB(PTA1);
+DigitalOut in3(PTC4);
+DigitalOut in4(PTC12);
+
+int main() 
+{
+    pc.baud(115200);
+    int error=0;
+     // Turn off motors - Initial state
+    in1=0;
+    in2=0;
+    in3=0;
+    in4=0;
+    
+    esp_initialize();    
+    
+    while(1) 
+    {
+        wait(5.0f);     
+        moisture_value = moisture;
+        light_value = light.read();
+        error = sensor.readData();
+        
+        if (0 == error) 
+        {
+            c   = sensor.ReadTemperature(CELCIUS);
+            h   = sensor.ReadHumidity();
+            printf("\n\rTemperature in Celcius: %4.2f \n",c);
+            printf("\rHumidity is %4.2f\n", h);
+        } 
+        else 
+        {
+            printf("Error: %d\n", error);
+        }
+    
+     printf("\rMoisture reading is %2.2f\n", moisture_value);
+     printf("\rLight reading is %2.2f\n", light_value);
+     
+     if(c>29.00f)
+     {
+         in1= 0;
+         in2= 1;
+         printf("\rFan is ON\n");
+     }
+     else
+     {
+         in1=0;
+         in2=0;
+         printf("\rFan is OFF\n");
+     }
+     if(moisture_value<0.40f)
+     {
+         in3=1;
+         in4=0;
+         printf("\rPump is ON\n");
+     }
+     else
+     {
+         in3=0;
+         in4=0;
+         printf("\rPump is OFF\n");
+     }
+     
+     if(light_value<0.30f)
+     {
+         LED = 0; //led on
+         pc.printf("\rLights ON\n");
+     }
+    else{ 
+        LED = 1; // led off
+        pc.printf("\rLights OFF\n");
+    }
+     wait(1.0f); 
+     esp_send();
+    } 
+}
+
+void esp_initialize(void)
+{    
+    pc.printf("Initializing ESP\r\n"); 
+      
+    pc.printf("Reset ESP\r\n"); 
+    esp.Reset();                   //RESET ESP
+    esp.RcvReply(rcv, 400);        //receive a response from ESP
+    //pc.printf(rcv);          //Print the response onscreen 
+    wait(2);
+    
+    strcpy(snd,"AT");
+    esp.SendCMD(snd);
+    pc.printf(snd);
+    //wait(2);
+    esp.RcvReply(rcv, 400);       
+    pc.printf(rcv);      
+    wait(0.1);
+    
+    strcpy(snd,"AT+CWMODE=1");
+    esp.SendCMD(snd);
+    pc.printf(snd);
+    wait(2);
+ 
+    strcpy(snd,"AT+CWJAP=\"");
+    strcat(snd,WIFI_SSID);
+    strcat(snd,"\",\"");
+    strcat(snd,WIFI_PASS);
+    strcat(snd,"\"");
+    
+    esp.SendCMD(snd);
+    pc.printf(snd);
+    wait(5);
+    esp.RcvReply(rcv, 400);       
+    pc.printf("\n %s \n", rcv); 
+    
+    strcpy(snd,"AT+CIPMUX=0");
+    esp.SendCMD(snd);
+    pc.printf(snd);
+    //wait(2);
+    esp.RcvReply(rcv, 400);       
+    pc.printf("\n %s \n", rcv); 
+ 
+}
+ 
+ 
+void esp_send(void)
+{
+   float field1 = c;
+   float field2 = h;
+   float field3 = moisture_value;
+   float field4 = light_value;
+    //ESP updates the Status of Thingspeak channel//
+    
+    strcpy(snd,"AT+CIPSTART=");
+    strcat(snd,"\"TCP\",\"");
+    strcat(snd,IP);
+    strcat(snd,"\",80");
+    
+    esp.SendCMD(snd); 
+    pc.printf("\rS\n%s",snd);
+    //wait(2);                                                    
+    esp.RcvReply(rcv, 1000);
+    pc.printf("\rR\n%s",rcv);
+    wait(1);
+    
+    sprintf(snd,"GET https://api.thingspeak.com/update?key=9QSZ6SX8FLBFM640&field1=%4.2f&field2=%4.2f&field3=%2.2f&field4=%2.2f\r\n",field1,field2,field3,field4);
+    
+    int i=0;
+    for(i=0;snd[i]!='\0';i++);
+    i++;
+    char cmd[255];
+    
+    sprintf(cmd,"AT+CIPSEND=%d",i);                                       //Send Number of open connection and Characters to send 
+    esp.SendCMD(cmd);
+    pc.printf("\rS\n%s",cmd);
+    while(i<=20 || rcv == ">")
+    {
+        esp.RcvReply(rcv, 1000);
+        wait(100);
+        i++;
+    }
+    pc.printf("\rR\n%s",rcv);
+    
+    esp.SendCMD(snd);                                                      //Post value to thingspeak channel
+    pc.printf("\rS\n%s",snd);
+    
+    while(i<=20 || rcv == "OK")
+    {
+        esp.RcvReply(rcv, 1000);
+        wait(100);
+        i++;
+    }
+    pc.printf("\rR\n%s",rcv);
+    
+}
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