This code uploads an analog value to the Things speak IOT server with the ESP8266 wifi module. Make sure to change the key to the data stream.
main.cpp
- Committer:
- janhavi
- Date:
- 2016-05-23
- Revision:
- 0:a42b121ce25a
File content as of revision 0:a42b121ce25a:
#include "mbed.h" #include "ESP8266.h" Serial pc(USBTX,USBRX); AnalogIn inputPin(A2); // temp ESP8266 wifi(PTE0, PTE1, 115200); // baud rate for wifi char snd[255],rcv[1000]; #define IP "184.106.153.149" // thingspeak.com IP Address float val; // value to holed the high/low info from pir from pin D2 int cnt = 0; // counter for motion /************ WiFi INTIALIZATION *********/ void wifi_send(void); int main () { pc.baud(9600); pc.printf("SET mode to AP\r\n"); wifi.SetMode(1); // set ESP mode to 1 wifi.RcvReply(rcv, 1000); //receive a response from ESP pc.printf("%s",rcv); //Print the response onscreen pc.printf("Conneting to AP\r\n"); wifi.Join("Eduvance_WiFi", "eduvance"); // Your wifi username & Password wifi.RcvReply(rcv, 1000); //receive a response from ESP pc.printf("%s", rcv); //Print the response onscreen wait(8); //waits for response from ESP pc.printf("Getting IP\r\n"); //get IP addresss from the connected AP wifi.GetIP(rcv); //receive an IP address from the AP pc.printf("%s", rcv); wait(5); // Delay 5 sec to give the pir time to get snapshut of the surrounding pc.printf("Initializing WiFi\r\n"); while (1) { val = inputPin.read(); pc.printf(" The Sensor is ON And I Detected = %i Till NOW\r\n",cnt); pc.printf("Sending WiFi information\n\r"); wifi_send(); cnt++; } } void wifi_send(void){ strcpy(snd,"AT+CIPMODE=0");//Setting WiFi into MultiChannel mode wifi.SendCMD(snd); pc.printf(snd); wifi.RcvReply(rcv, 3000); pc.printf("%s", rcv); //WIFI updates the Status to Thingspeak servers// strcpy(snd,"AT+CIPMUX=1");//Setting WiFi into MultiChannel mode wifi.SendCMD(snd); pc.printf(snd); wifi.RcvReply(rcv, 3000); pc.printf("%s", rcv); sprintf(snd,"AT+CIPSTART=4,\"TCP\",\"%s\",80",IP); //Initiate connection with THINGSPEAK server wifi.SendCMD(snd); pc.printf(snd); wifi.RcvReply(rcv, 3000); pc.printf("%s", rcv); strcpy(snd,"AT+CIPSEND=4,46"); //Send Number of open connections,Characters to send wifi.SendCMD(snd); pc.printf(snd); wifi.RcvReply(rcv, 3000); pc.printf("%s", rcv); sprintf(snd,"GET /update?key=4CDAJHYQ6JDNJC5G&field1=%2.2f\r\n",val); //Post values to thingspeak pc.printf("String length %3d\r\n",strlen(snd)); pc.printf("%s",snd); wifi.SendCMD(snd); wifi.RcvReply(rcv, 3000); pc.printf("%s", rcv); //wifi.SendCMD("AT+CIPCLOSE"); //Close the connection to server //wifi.RcvReply(rcv, 3000); //pc.printf("%s", rcv); }