Diff: main.cpp

Revision:

14:02ddfa711646

Parent:

4:81cea7a352b0

Child:

15:67a7cca7ae06

--- a/main.cpp	Fri Aug 12 18:36:42 2016 +0000
+++ b/main.cpp	Sun Mar 19 20:17:30 2017 +0000
@@ -1,12 +1,213 @@
+
 #include "mbed.h"
+#include "ESP8266.h"               // Include header file from Author: Antonio Quevedo
+#include "math.h"
+#include <string>
+
+#define APIKEY 45IE5JPN8ZIK2W2M    //Put "Write key" of your channel in thingspeak.com 
+#define IP "184.106.153.149"       // IP Address of "api.thingspeak.com\"
+#define WIFI_SSID "Redmi"
+#define WIFI_PASS "akash12345"
+
+Serial pc(USBTX,USBRX);
+SPI spi(PTC6,PTC7,PTC5); // (MOSI MISO CLK)setup SPI interface on pins PTC5,PTC6,PTC7
+ESP8266 esp(PTC17, PTC16, 115200); // baud rate for wifi
+
+DigitalOut cs1(PTC4);
+DigitalOut cs2(PTC3);
+I2C i2c(PTD9,PTD8);
+
+//AnalogIn check(PTB6);
+const int addr = 0x88;
+
+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  
+
+int cnt = 0;                       // counter for  number of motion detected
+int cnt1 = 0;                       // counter for  number of motion detected
+int cnt2 = 0;                       // counter for  number of motion detected
 
-DigitalOut myled(LED1);
+float ammeter_out = 0;
+float voltmeter_out = 0;
+float light_out = 0;
+
+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 
+
+int main() 
+{
+    
+    pc.baud(115200);           // Baud rate used for communicating with Tera-term on PC
+    
+    pc.printf("START\r\n");  // Starting point
+    
+    esp_initialize();
+    
+    //ammeter + voltmeter code
+    spi.format(8,0);
+    spi.frequency(1000000);
+    pc.printf("Analog read test from spi.\n");
+    pc.printf("\n\r");
+    
+    //light code
+    int exp,exp1,l=1;
+    i2c.frequency(100000); // set required i2c frequency
+    //pc.baud(9600); //set baud rate
+    pc.printf("I2C started!\r\n");
+    pc.printf("\n\r");
+    char cmd[3]; //for byte transfer
 
-int main() {
-    while(1) {
-        myled = 1;
-        wait(0.2);
-        myled = 0;
-        wait(0.2);
+    while (1) 
+    {
+        wait(15);
+        //ammeter code
+    
+        cs1=0;
+        //spi.write();
+        //pc.printf("%d\r\n",k);
+        int high_byte = spi.write(0);
+        int low_byte = spi.write(0);
+        cs1=1;
+        float m = ((high_byte & 0x1f) << 7) | ((low_byte >> 1));    
+        float k= (float)((m*1)/4096); // show value in volts. 
+        ammeter_out = (float)((k-0.5)*1000);
+        pc.printf("Current value:            %f mA\r\n", ammeter_out);
+        //pc.printf("Analog Value of current : %.2f\n\r",m);
+        wait_ms(100);
+        
+        cs2=0;
+        //spi.write();
+        //pc.printf("%d\r\n",k);
+        int hi_byte = spi.write(0);
+        int lo_byte = spi.write(0);
+        cs2=1;
+        float x = ((hi_byte & 0x1f) << 7) | ((lo_byte >> 1));
+        
+        float r= (float)((x*33)/4096); // show value in volts.
+        voltmeter_out = (float)(r-16.5);
+        pc.printf("AD Voltage channel value: %f V\r\n", voltmeter_out);
+        //pc.printf("Voltage Analog Value: %.2f\n\r",x);
+        wait_ms(100);
+        
+         //ambient light sensor code
+        
+        cmd[0] = 0x01;   //configuration register
+        cmd[1]= 0xCC;    //configuration data
+        cmd[2]= 0x01;   //configuration data
+        i2c.write(addr, cmd, 3);
+        cmd[0] = 0x00; // data register
+        i2c.write(addr, cmd, 1);
+        wait_ms(100);
+        i2c.read(addr, cmd, 2);
+     
+        exp= cmd[0]>>4;
+        exp1= (cmd[0]-(exp<<4))*256+cmd[1];
+       // pc.printf("exponent = 0x%x\n\r", exp);
+       // pc.printf("fraction = %d\n\r", exp1);
+        l=1;
+        for(int r=0;r<exp;r++){l=l*2;};
+          //  pc.printf("value = %d\n\r", l);
+        light_out= (exp1*l)/100;
+        pc.printf("Lux = %.2f\n\r", light_out);  // printing LUX value
+        pc.printf("\n\r");
+        wait_ms(100); 
+        
+        pc.printf("Sending this information to thingspeak.com = %d\r\n",cnt);
+        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)
+{
+   
+    //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=45IE5JPN8ZIK2W2M&field1=%f&field2=%f&field3=%f\r\n",ammeter_out,voltmeter_out,light_out);
+    
+    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);
+    
+}
+