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Working code from Niranjan
main.cpp
- Committer:
- Niranjan_ravi
- Date:
- 2018-11-28
- Revision:
- 4:42dd8d5d118b
- Parent:
- 3:164296bb4985
File content as of revision 4:42dd8d5d118b:
#include "mbed.h" #include "ESP8266.h" // Include header file from Author: Antonio Quevedo #include "math.h" #include <string> #define APIKEY W4VWN2SK5LC1VZ9Z //Put "Write key" of your channel in thingspeak.com #define IP "184.106.153.149" // IP Address of "api.thingspeak.com\" #define WIFI_SSID "Niran" #define WIFI_PASS "12345678910" 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; int main() { pc.baud(115200); // Baud rate used for communicating with Tera-term on PC pc.printf("START\r\n"); // Starting point esp_initialize(); while (1) { wait(15); pc.printf("test value is %f%f\n",i,j); 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=E3AASCJVE2KQDD3V&field1=%f&field2=%f\r\n",i,j); sprintf(snd,"GET https://api.thingspeak.com/update?key=W4VWN2SK5LC1VZ9Z&field1=%f&field2=%f\r\n",i,j); 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); }