![](/media/cache/group/FB.png.50x50_q85.png)
LED COontrol Using Thingspeak
Fork of ESP8266-FRDM-KL25Z-THINGSPEAK by
main.cpp
- Committer:
- mrbhatter
- Date:
- 2018-05-22
- Revision:
- 3:1722a03793c6
- Parent:
- 2:97dbf542ebee
- Child:
- 4:d0819505c82a
- Child:
- 5:7d9cea3f910f
File content as of revision 3:1722a03793c6:
#include "mbed.h" #include "ESP8266.h" Serial pc(USBTX,USBRX); DigitalOut rled(LED1); //wifi UART port and baud rate ESP8266 wifi(PTE0, PTE1, 115200); // Class Variable Pin dexlaration for WIFI //buffers for wifi library char snd[255],resp[9000]; char http_cmd[300], comm[300]; char url_response[9000]; int timeout = 5000; //timeout for wifi commands //SSID and password for connection #define SSID "Karkhana" #define PASS "Karkhana2018" void control_led(void); //Remote IP #define IP "184.106.153.149" // IP for thingspeak server. Remains same for al codes using thingspeak //#define IP "192.168.0.25" //waterlevelue global variable int ledstatus=0; //Public and private keys for phant char* Update_Key = "QRCE7DOPVY3I49YN"; // Copy the read key for your channel and paste it here. //char* Private_Key = "GPoWnRM60yidrB0e1pXD"; //Wifi init function. Sets the module to connect to wifi accesspoint with ssid and password mentioned above 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"); 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.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"); 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){ pc.printf("******** Starting TCP connection on IP and port ********\r\n"); wifi.startTCPConn(IP,80); //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"); wait(1); //create link sprintf(http_cmd,"/channels/501352/fields/1.json?api_key=%s&results=2",Update_Key); // Forms the url for transmitting to thingspeak server. the format can be seen on thingspeak site as well pc.printf(http_cmd); pc.printf("******** Sending URL to wifi ********\r\n"); wifi.sendURL(http_cmd, comm); //cipsend and get command if (wifi.RcvReply(resp, timeout)){ pc.printf("--------------------------Request Response -------------------------------------------\r\n"); pc.printf("%s",resp); pc.printf("--------------------------Request Response -------------------------------------------\r\n"); control_led(); } else pc.printf("No response while sending URL \r\n"); //wifi.SendCMD("AT+CIPCLOSE"); //Close the connection to server //wifi.RcvReply(resp, timeout); //pc.printf("%s", resp); } void control_led(void) { int length=strlen(resp); pc.printf("Length of response: %d\r\n",strlen(resp)); ledstatus=int(resp[length-13]); pc.printf("LED Status is %c\r\n",resp[length-13]); pc.printf("LED status is %d\r\n",ledstatus); if(resp[length-13]==49){ pc.printf("LED ON"); rled=0; } else{ pc.printf("LED OFF"); rled=1; } } int main () { wifi_initialize(); // Calls function defined above to initialize the wifi module while (1) { wifi_send(); // Calls function defined above to send data to thingspeak //wait(5); } }