ESP8266 / Mbed 2 deprecated ESP8266_HTTP_HelloWorld

HTTP Client with ESP8266 working example

Dependencies:   ESP8266Interface HTTPClient-SSL WebSocketClient mbed-rtos mbed

Fork of ESP8266_WebSockets_HelloWorld by ESP8266

This repository has been superceded

This project has moved to https://developer.mbed.org/teams/ESP8266/code/mbed-os-example-esp8266/

Introduction

This is a basic Hello World program for interfacing the ESP8266 chip with HTTP. It will execute a GET on httpbin.org/get, and a POST to httpbin.org/post.

ESP8266_HTTP_HelloWorld

  1. change ssid and passphrase to match your wifi connection
  2. Initialize ESP8266 with DHCP enabled
  3. Get mbed.org
    1. Print the information retrieved
  4. Post to httbin.org
    1. Print the information retrieved

You can view the information retrieved through a serial terminal set to 9600 baud.

Successful Execution

you should see something like the following on the terminal if the program successfully executes. /media/uploads/mbedAustin/httpclient.png

Diff: main.cpp

Revision:
9:91fe783e1dd4
Parent:
8:af3b0b5438ad
Child:
12:978788c2156c
--- a/main.cpp	Fri May 01 15:40:01 2015 +0000
+++ b/main.cpp	Fri May 01 17:54:08 2015 +0000
@@ -1,36 +1,35 @@
 #include "mbed.h"
 #include "ESP8266Interface.h"
-#include "UDPSocket.h"
+#include "TCPSocketConnection.h"
  
 const char* ECHO_SERVER_ADDRESS = "192.168.2.4";
 const int ECHO_SERVER_PORT = 8080;
 ESP8266Interface wifi(D1,D0,D10,"demossid","password",115200); // TX,RX,Reset,SSID,Password
 RawSerial pc(USBTX, USBRX); // tx, rx
-
+ 
 int main() {
     pc.baud(115200);
     wifi.init(); //Use DHCP
     wifi.connect();
-    
-    UDPSocket sock;
-    sock.init();
+    pc.printf("IP Address is %s\n", wifi.getIPAddress());
     
-    Endpoint echo_server;
-    echo_server.set_address(ECHO_SERVER_ADDRESS, ECHO_SERVER_PORT);
+    TCPSocketConnection socket;
+    while (socket.connect(ECHO_SERVER_ADDRESS, ECHO_SERVER_PORT) < 0) {
+        pc.printf("Unable to connect to (%s) on port (%d)\n", ECHO_SERVER_ADDRESS, ECHO_SERVER_PORT);
+        wait(1);
+    }
     
-    pc.printf("\r\nESP IP: %s\r\n",wifi.getIPAddress());
-    
-    char out_buffer[] = "Hello World\n";
-    sock.sendTo(echo_server, out_buffer, sizeof(out_buffer));
+    char hello[] = "Hello World\n";
+    socket.send_all(hello, sizeof(hello) - 1);
     
-    char in_buffer[256];
-    int n = sock.receiveFrom(echo_server, in_buffer, sizeof(in_buffer));
-    
-    in_buffer[n] = '\0';
-    pc.printf("%s\n", in_buffer);
+    char buf[256];
+    int n = socket.receive(buf, 256);
+    buf[n] = '\0';
+    pc.printf("%s", buf);
     
-    sock.close();
-    
+    socket.close();
     wifi.disconnect();
-    while(1) {}
-}
\ No newline at end of file
+    
+    while(true) {}
+}
+ 
\ No newline at end of file