Revision 1:8bdc77b1fc60, committed 2018-12-13

Comitter:

geekypirate

Date:

Thu Dec 13 00:50:21 2018 +0000

Parent:

0:9d72427a0730

Commit message:

This is the prototype build of pipe freeze detection using K64F, DHT11 & ESP8266 WiFi chip

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ESP8266.lib	Thu Dec 13 00:50:21 2018 +0000
@@ -0,0 +1,1 @@
+https://developer.mbed.org/users/janhavi/code/ESP8266/#4f24e7e803a1

--- a/main.cpp	Thu Dec 31 22:03:48 2015 +0000
+++ b/main.cpp	Thu Dec 13 00:50:21 2018 +0000
@@ -1,28 +1,167 @@
-
 #include "mbed.h"
+#include "ESP8266.h"               // Include header file from Author: Antonio Quevedo
+#include "math.h"
+#include <string>
 #include "DHT.h"
 
-DHT sensor(D4, DHT11);
+#define APIKEY OF2O1FTK5UNXYWO8    //Put "Write key" of your channel in thingspeak.com 
+#define IP "184.106.153.149"       // IP Address of "api.thingspeak.com\"
+#define WIFI_SSID "WiFi"
+#define WIFI_PASS "b5c7f638"
+
+//Board Pinouts******************
+DigitalOut heater(D2); //Defining heater pin
+DHT sensor(D4, DHT11); //defining temperature sensor
+//*******************************
+
+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 
+
+float temperature = 0.0f;
+
 
-int main()
+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;
+  
+
+int main() 
 {
+    
+    pc.baud(115200);           // Baud rate used for communicating with Tera-term on PC
+    
+    pc.printf("START\r\n");  // Starting point
+    
     int error = 0;
-    float h = 0.0f, c = 0.0f, f = 0.0f, k = 0.0f, dp = 0.0f, dpf = 0.0f;
+    
+    esp_initialize();
 
     while(1) {
+        
+        
         wait(2.0f);
-        error = sensor.readData();
+        error = sensor.readData(); //read sensor for error
         if (0 == error) {
-            c   = sensor.ReadTemperature(CELCIUS);
-            f   = sensor.ReadTemperature(FARENHEIT);
-            k   = sensor.ReadTemperature(KELVIN);
-            h   = sensor.ReadHumidity();
-            dp  = sensor.CalcdewPoint(c, h);
-            dpf = sensor.CalcdewPointFast(c, h);
-            printf("Temperature in Kelvin: %4.2f, Celcius: %4.2f, Farenheit %4.2f\n", k, c, f);
-            printf("Humidity is %4.2f, Dewpoint: %4.2f, Dewpoint fast: %4.2f\n", h, dp, dpf);
-        } else {
+            temperature   = sensor.ReadTemperature(CELCIUS);
+            printf("Temperature in Celcius: %4.2f\n", temperature);
+        } 
+        else {
             printf("Error: %d\n", error);
         }
+        
+        if (temperature > 24.00) {
+            heater = 1;
+            printf("Heater is OFF\n");
+        }
+        else {
+            heater = 0;
+            printf("Heater is ON\n");
+        }  
+
+        wait(3);
+        esp_send(); 
+        i++;
+        j--;
+        
     }
 }
+
+
+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)
+{
+   
+    //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("S\r\n%s",snd);
+    //wait(2);                                                    
+    esp.RcvReply(rcv, 1000);
+    pc.printf("R\r\n%s",rcv);
+    wait(1);
+    
+    sprintf(snd,"GET https://api.thingspeak.com/update?key=OF2O1FTK5UNXYWO8&field1=%f&field2=%f\r\n",temperature,heater);
+    
+    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("S\r\n%s",cmd);
+    while(i<=20 || rcv == ">")
+    {
+        esp.RcvReply(rcv, 1000);
+        wait(100);
+        i++;
+    }
+    pc.printf("R\r\n%s",rcv);
+    
+    esp.SendCMD(snd);                                                      //Post value to thingspeak channel
+    pc.printf("S\r\n%s",snd);
+    
+    while(i<=20 || rcv == "OK")
+    {
+        esp.RcvReply(rcv, 1000);
+        wait(100);
+        i++;
+    }
+    pc.printf("R\r\n%s",rcv);
+    
+}