Send and recieve data in same code

Using Arduino Programming Questions
1

I am writing a code using ethercard library which sends a post request in setup by calling sendData() and recieves get requests in loop() function but the issue is i am able to do only one task (either send post request or recieve get request) one of them fails(the first called only works).How do i close tcp connection socket after use.

#include <EtherCard.h>

static byte mymac[] = { 0x74,0x69,0x69,0x2D,0x30,0x31 };

byte Ethernet::buffer[700];
static uint32_t timer;

int fPin = 10;
int bPin = 9;

char website[]  = "172.26.40.209";

void sendData(){

	int count = 0;
	while(count < 2){

		ether.packetLoop(ether.packetReceive());

		if (millis() > timer) {

			count++;
			timer = millis() + 5000;
			Serial.println();
			Serial.print("<<< REQ ");


char a1[10],a2[10],a3[10],a4[10],ipSend[20];
sprintf(ipSend,"%d.%d.%d.%d",ether.myip[0],ether.myip[1],ether.myip[2],ether.myip[3]);

char b1[10],b2[10],b3[10],b4[10],b5[10],b6[10],macSend[25];
sprintf(macSend,"%d:%d:%d:%d:%d:%d",mymac[0],mymac[1],mymac[2],mymac[3],mymac[4],mymac[5]);

			Stash stash;
			byte sd = stash.create();
			stash.print("ip=");
      stash.print(ipSend);
      stash.print("&mac=");
			stash.print(macSend);
   
			stash.save();
			Stash::prepare(PSTR("POST http://$F:8080/Connect/Arduino_data HTTP/1.1" "\r\n"
						"Host: $F:8080" "\r\n"
						"Content-Length: $D" "\r\n"
						"\r\n"
						"$H"),
					website, website, stash.size(), sd);
			ether.tcpSend();

		}

	}

}

void setup () {

  pinMode(fPin, OUTPUT);
  pinMode(bPin, OUTPUT);

  digitalWrite(bPin,HIGH);
  
	Serial.begin(9600);
	Serial.println('A');
	Serial.println("\n[webClient]");

	if (ether.begin(sizeof Ethernet::buffer, mymac,8) == 0) 
		Serial.println("Failed to access Ethernet controller");
	if (!ether.dhcpSetup())
		Serial.println("DHCP failed");

	ether.printIp("IP:  ", ether.myip);
	ether.printIp("GW:  ", ether.gwip);  
	ether.printIp("DNS: ", ether.dnsip);  

	ether.parseIp(ether.hisip, website);

	ether.hisport = 8080;

	ether.printIp("SRV: ", ether.hisip);

	sendData();        // for post request

}

void loop () {      //getting get requests

     word len = ether.packetReceive();
     word pos = ether.packetLoop(len);
     
     if (strstr((char *)Ethernet::buffer + pos, "GET /?PIN9=ON") != 0) {
     Serial.println("Received ON command");
     digitalWrite(bPin, HIGH);
     }else if (strstr((char *)Ethernet::buffer + pos, "GET /?PIN9=OFF") != 0) {
     Serial.println("Received OFF command");
     digitalWrite(bPin, LOW);
     }else if (strstr((char *)Ethernet::buffer + pos, "GET /?PIN10=ON") != 0) {
     Serial.println("Received ON command");
     digitalWrite(fPin, HIGH);
     }else if (strstr((char *)Ethernet::buffer + pos, "GET /?PIN10=OFF") != 0) {
     Serial.println("Received OFF command");
     digitalWrite(fPin, LOW);
     }


}
2

I do not know coding much but if I would be there in your place I would use two atmega chips.

3

Without reading your code, I'd suspect that the problem is that you are not dealing with the http Content-Length header (or the lack thereof). Basically, you need to close the socket after each complete request/reply sequence. There are better ways to do it, but closing the socket is simplest.

4

I don't think it is the content-length header issue. I think i should close post request connection when starting get request receiving loop but i don't know how to do it.
So how do i close a tcp socket.
If i want my get request receiving to work i should comment out these three lines if any one is missing i won't get any request.
What should i do now to make both post and get work.

  ether.parseIp(ether.hisip, website);

  ether.hisport = 8080;

	sendData();
5