Niranjan Ravi
Working code from Niranjan
Diff: main.cpp
- Revision:
- 3:164296bb4985
- Parent:
- 2:817794b2f733
- Child:
- 4:42dd8d5d118b
--- a/main.cpp Sun Jun 26 10:19:24 2016 +0000
+++ b/main.cpp Sat May 06 21:17:22 2017 +0000
@@ -1,124 +1,137 @@
#include "mbed.h"
-#include "ESP8266.h"
-
+#include "ESP8266.h" // Include header file from Author: Antonio Quevedo
+#include "math.h"
+#include <string>
+
+#define APIKEY E3AASCJVE2KQDD3V //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);
-//POT sensor
-AnalogIn pot(PTB0);
-
-//wifi UART port and baud rate
-ESP8266 wifi(PTE0, PTE1, 115200);
+ESP8266 esp(PTC17, PTC16, 115200); // baud rate for wifi
-//buffers for wifi library
-char snd[255],resp[1000];
-char http_cmd[300], comm[300];
-
-int timeout = 3000; //timeout for wifi commands
+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
-//SSID and password for connection
-#define SSID "Eduvance_WiFi"
-#define PASS "eduvance"
-
-//Remote IP
-#define IP "192.168.0.2"
+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
-//ldrvalue global variable
-float ldrval = 0;
+//test variable
+float i=0;
+float j=10;
-//Public and private keys for phant
-char* Public_Key = "eaWkxgdlQZszLEDKpy6OFeDeO8x";
-char* Private_Key = "25xqpAeBmzSml4Yjpr05Hj3jOBq";
-
-//Wifi init function
-void wifi_initialize(void){
-
- pc.printf("******** Resetting wifi module ********\r\n");
- wifi.Reset();
-
- //wait for 5 seconds for response, else display no response receiveed
- if (wifi.RcvReply(resp, 5000))
- pc.printf("%s",resp);
- else
- pc.printf("No response");
+int main()
+{
- pc.printf("******** Setting Station mode of wifi with AP ********\r\n");
- wifi.SetMode(1); // set transparent mode
- if (wifi.RcvReply(resp, timeout)) //receive a response from ESP
- pc.printf("%s",resp); //Print the response onscreen
- else
- pc.printf("No response while setting mode. \r\n");
+ pc.baud(115200); // Baud rate used for communicating with Tera-term on PC
+
+ pc.printf("START\r\n"); // Starting point
+
+ esp_initialize();
- pc.printf("******** Joining network with SSID and PASS ********\r\n");
- wifi.Join(SSID, PASS);
- if (wifi.RcvReply(resp, timeout))
- pc.printf("%s",resp);
- else
- pc.printf("No response while connecting to network \r\n");
+
+
+ while (1)
+ { wait(15);
+ pc.printf("test value is %f%f\n",i,j);
+ esp_send();
+ i++;
+ j--;
- pc.printf("******** Getting IP and MAC of module ********\r\n");
- wifi.GetIP(resp);
- if (wifi.RcvReply(resp, timeout))
- pc.printf("%s",resp);
- else
- pc.printf("No response while getting IP \r\n");
-
- pc.printf("******** Setting WIFI UART passthrough ********\r\n");
- wifi.setTransparent();
- if (wifi.RcvReply(resp, timeout))
- pc.printf("%s",resp);
- else
- pc.printf("No response while setting wifi passthrough. \r\n");
- wait(1);
-
- pc.printf("******** Setting single connection mode ********\r\n");
- wifi.SetSingle();
- wifi.RcvReply(resp, timeout);
- if (wifi.RcvReply(resp, timeout))
- pc.printf("%s",resp);
- else
- pc.printf("No response while setting single connection \r\n");
- wait(1);
+ }
}
-void wifi_send(void){
+
+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,"\"");
- pc.printf("******** Starting TCP connection on IP and port ********\r\n");
- wifi.startTCPConn(IP, 8080); //cipstart
- wifi.RcvReply(resp, timeout);
- if (wifi.RcvReply(resp, timeout))
- pc.printf("%s",resp);
- else
- pc.printf("No response while starting TCP connection \r\n");
+ 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);
- //create link
- sprintf(http_cmd,"/input/%s?private_key=%s&val=%0.2f",Public_Key,Private_Key,ldrval);
- pc.printf(http_cmd);
+ sprintf(snd,"GET https://api.thingspeak.com/update?key=E3AASCJVE2KQDD3V&field1=%f&field2=%f\r\n",i,j);
+
+ int i=0;
+ for(i=0;snd[i]!='\0';i++);
+ i++;
+ char cmd[255];
- pc.printf("******** Sending URL to wifi ********\r\n");
- wifi.sendURL(http_cmd, comm); //cipsend and get command
- if (wifi.RcvReply(resp, timeout))
- pc.printf("%s",resp);
- else
- pc.printf("No response while sending URL \r\n");
+ 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);
- //wifi.SendCMD("AT+CIPCLOSE"); //Close the connection to server
- //wifi.RcvReply(resp, timeout);
- //pc.printf("%s", resp);
+ 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);
+
}
-
-int main () {
-
-
- wifi_initialize();
-
- while (1) {
- ldrval = pot.read();
- pc.printf("Potentiometer ldrvalue=%.3f \r\n", ldrval);
-
- wifi_send();
- wait(3);
- }
-}
-
-