Diff: main.cpp

Revision:

0:6817186f0ebb

Child:

1:cf615fecaa49

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Jun 03 11:54:46 2019 +0000
@@ -0,0 +1,140 @@
+#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 "NETGEAR63"     
+#define PASS "dailyhat870"  
+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 = "W5FHDPB9UO357P7I";                   // 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/499883/feeds.json?api_key=%s&results=1",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);
+    }
+}
\ No newline at end of file