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This repository has been superceded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:
12:978788c2156c
Parent:
9:91fe783e1dd4
Child:
13:5f2bb0dc134b
--- a/main.cpp	Fri May 01 18:29:45 2015 +0000
+++ b/main.cpp	Wed Jun 03 18:47:14 2015 +0000
@@ -1,34 +1,44 @@
 #include "mbed.h"
 #include "ESP8266Interface.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
+#include "TCPSocketServer.h"
+#include "Websocket.h"
+
+
+
+ESP8266Interface wifi(D1,D0,D10,"demossid","password",115200); // TX,RX,Reset,SSID,Password,Baud
 RawSerial pc(USBTX, USBRX); // tx, rx
  
 int main() {
     pc.baud(115200);
-    wifi.init(); //Use DHCP
-    wifi.connect();
+    wifi.init(); //Reset
+    wifi.connect(); //Use DHCP
     pc.printf("IP Address is %s\n", wifi.getIPAddress());
     
-    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);
-    }
+    Websocket ws("ws://192.168.1.20:8888/ws");
     
-    char hello[] = "Hello World\n";
-    socket.send_all(hello, sizeof(hello) - 1);
-    
-    char buf[256];
-    int n = socket.receive(buf, 256);
-    buf[n] = '\0';
-    pc.printf("%s", buf);
-    
-    socket.close();
-    wifi.disconnect();
+    //Check for successful socket connection
+    if(!ws.connect())
+        ws.close();
+    else{
+        char str[100];
+        
+        for(int i=0; i<0x7fffffff; ++i) {
+            // string with a message
+            sprintf(str, "%d WebSocket Hello World over Ethernet", i);
+            ws.send(str);
+        
+            // clear the buffer and wait a sec...
+            memset(str, 0, 100);
+            wait(0.5f);
+        
+            // websocket server should echo whatever we sent it
+            if (ws.read(str)) {
+                pc.printf("rcv'd: %s\n", str);
+            }
+        }
+    }
+    ws.close();
     
     while(true) {}
 }