ACKme / Mbed 2 deprecated wiconnect-http_get_example

Simple app demonstrating the HTTP GET feature of the WiConnect Host Library.

Dependencies:   WiConnect mbed

example.cpp@11:b7a7a7d3b805, 2014-11-03 (annotated)

Committer:
dan_ackme
Date:
Mon Nov 03 23:58:14 2014 +0000
Revision:
11:b7a7a7d3b805
Parent:
6:f6cf38fba1d4 
Specify network credentials in example.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dan_ackme 1:40ed62996887 1 /**
dan_ackme 1:40ed62996887 2 * @example http_get/example.cpp
dan_ackme 1:40ed62996887 3 *
dan_ackme 1:40ed62996887 4 * This is an example of using the http socket API to
dan_ackme 1:40ed62996887 5 * download a webpage.
dan_ackme 1:40ed62996887 6 *
dan_ackme 1:40ed62996887 7 * It works as follows:
dan_ackme 1:40ed62996887 8 * 1. Instantiate the WiConnect Library
dan_ackme 1:40ed62996887 9 * 2. Initiate Communication with WiFi Module
dan_ackme 1:40ed62996887 10 * 3. Issue a HTTP GET request (Note: The module must have valid network credentials See @ref web_setup/example.cpp)
dan_ackme 1:40ed62996887 11 * 4. Read the HTTP page and print
dan_ackme 1:40ed62996887 12 * 5. That's it!
dan_ackme 1:40ed62996887 13 *
dan_ackme 1:40ed62996887 14 */
dan_ackme 1:40ed62996887 15
dan_ackme 1:40ed62996887 16
dan_ackme 1:40ed62996887 17 /******************************************************************************
dan_ackme 1:40ed62996887 18 * Example Variables
dan_ackme 1:40ed62996887 19 */
dan_ackme 1:40ed62996887 20
dan_ackme 1:40ed62996887 21 // the URL of the webpage to GET
dan_ackme 11:b7a7a7d3b805 22 #define HTTP_URL "http://mbed.org/"
dan_ackme 1:40ed62996887 23
dan_ackme 1:40ed62996887 24
dan_ackme 11:b7a7a7d3b805 25 // This is the name of your WiFi network
dan_ackme 11:b7a7a7d3b805 26 // Look for this name in your WiFi settings
dan_ackme 11:b7a7a7d3b805 27 // (e.g. your phone's list of WiFi networks in the WiFi settings menu)
dan_ackme 11:b7a7a7d3b805 28 // tip: add double-quotes around SSID to add spaces to name
dan_ackme 11:b7a7a7d3b805 29 #define NETWORK_SSID "<YOUR SSID>"
dan_ackme 1:40ed62996887 30
dan_ackme 11:b7a7a7d3b805 31 // This is the password of your WiFi network
dan_ackme 11:b7a7a7d3b805 32 // Leave as empty string (e.g "") to connect to OPEN network
dan_ackme 11:b7a7a7d3b805 33 #define NETWORK_PASSWORD "<YOUR PASSWORD>"
dan_ackme 1:40ed62996887 34
dan_ackme 1:40ed62996887 35
dan_ackme 1:40ed62996887 36 /******************************************************************************
dan_ackme 1:40ed62996887 37 * Includes
dan_ackme 1:40ed62996887 38 */
dan_ackme 1:40ed62996887 39
dan_ackme 1:40ed62996887 40 // include C library headers
dan_ackme 1:40ed62996887 41 #include <stdio.h> // needed for printf
dan_ackme 1:40ed62996887 42
dan_ackme 1:40ed62996887 43 // include target specific defines
dan_ackme 1:40ed62996887 44 #include "target_config.h"
dan_ackme 1:40ed62996887 45 // include the Wiconnect Host Library API header
dan_ackme 1:40ed62996887 46 #include "Wiconnect.h"
dan_ackme 1:40ed62996887 47
dan_ackme 1:40ed62996887 48
dan_ackme 1:40ed62996887 49
dan_ackme 1:40ed62996887 50
dan_ackme 1:40ed62996887 51 /******************************************************************************
dan_ackme 1:40ed62996887 52 * Global Defines
dan_ackme 1:40ed62996887 53 */
dan_ackme 1:40ed62996887 54
dan_ackme 1:40ed62996887 55
dan_ackme 1:40ed62996887 56 // Serial used for printfs to terminal (i.e. NOT used for WiConnect)
dan_ackme 1:40ed62996887 57 static Serial consoleSerial(STDIO_UART_TX, STDIO_UART_RX);
dan_ackme 1:40ed62996887 58
dan_ackme 1:40ed62996887 59
dan_ackme 1:40ed62996887 60
dan_ackme 1:40ed62996887 61 /******************************************************************************
dan_ackme 1:40ed62996887 62 * Starting point of application
dan_ackme 1:40ed62996887 63 */
dan_ackme 1:40ed62996887 64 int main(int argc, char **argv)
dan_ackme 1:40ed62996887 65 {
dan_ackme 1:40ed62996887 66 consoleSerial.baud(115200); // console terminal to 115200 baud
dan_ackme 1:40ed62996887 67
dan_ackme 1:40ed62996887 68 //-------------------------------------------------------------------------
dan_ackme 1:40ed62996887 69 // STEP 1: Instantiate WiConnect Library
dan_ackme 1:40ed62996887 70 //-------------------------------------------------------------------------
dan_ackme 1:40ed62996887 71
dan_ackme 1:40ed62996887 72 // Setup wiconnect serial interface configuration
dan_ackme 1:40ed62996887 73 // Here we only specify the rx buffer size and not rx buffer pointer, this means
dan_ackme 1:40ed62996887 74 // The serial RX buffer will be dynamically allocated
dan_ackme 1:40ed62996887 75 SerialConfig serialConfig(WICONNECT_RX_PIN, WICONNECT_TX_PIN, 256, NULL);
dan_ackme 1:40ed62996887 76
dan_ackme 1:40ed62996887 77 // Instantiate and initialize the Wiconnect library
dan_ackme 1:40ed62996887 78 // Here we only specify the buffer size and not buffer pointer, this means
dan_ackme 1:40ed62996887 79 // The internal buffer will be dynamically allocated
dan_ackme 1:40ed62996887 80 Wiconnect wiconnect(serialConfig, 256, NULL, WICONNECT_RESET_PIN);
dan_ackme 1:40ed62996887 81
dan_ackme 1:40ed62996887 82 // set the default timeout to 15s as some websites take awhile to respond
dan_ackme 1:40ed62996887 83 wiconnect.setCommandDefaultTimeout(15000);
dan_ackme 1:40ed62996887 84
dan_ackme 1:40ed62996887 85 //-------------------------------------------------------------------------
dan_ackme 1:40ed62996887 86 // STEP 2: Initiate Communication with WiFi Module
dan_ackme 1:40ed62996887 87 //-------------------------------------------------------------------------
dan_ackme 1:40ed62996887 88
dan_ackme 1:40ed62996887 89 printf("Initializing WiConnect Library...\r\n");
dan_ackme 1:40ed62996887 90
dan_ackme 1:40ed62996887 91 // Initialize communication with WiFi module
dan_ackme 1:40ed62996887 92 if(wiconnect.init(true) != WICONNECT_SUCCESS)
dan_ackme 1:40ed62996887 93 {
dan_ackme 1:40ed62996887 94 printf("Failed to initialize communication with WiFi module!\r\n"
dan_ackme 1:40ed62996887 95 "Make sure the wires are connected correctly\r\n");
dan_ackme 1:40ed62996887 96 for(;;); // infinite loop
dan_ackme 1:40ed62996887 97 }
dan_ackme 11:b7a7a7d3b805 98
dan_ackme 11:b7a7a7d3b805 99 printf("Joining Wi-Fi network: %s\r\n", NETWORK_SSID);
dan_ackme 11:b7a7a7d3b805 100 if(wiconnect.join(NETWORK_SSID, NETWORK_PASSWORD) != WICONNECT_SUCCESS)
dan_ackme 11:b7a7a7d3b805 101 {
dan_ackme 11:b7a7a7d3b805 102 NetworkJoinResult joinResult;
dan_ackme 11:b7a7a7d3b805 103 wiconnect.getNetworkJoinResult(&joinResult);
dan_ackme 11:b7a7a7d3b805 104 printf("Failed to send join command. Join result: %s\r\n", Wiconnect::networkJoinResultToStr(joinResult));
dan_ackme 11:b7a7a7d3b805 105 for(;;); // infinite loop
dan_ackme 11:b7a7a7d3b805 106 }
dan_ackme 1:40ed62996887 107
dan_ackme 1:40ed62996887 108
dan_ackme 1:40ed62996887 109 //-------------------------------------------------------------------------
dan_ackme 1:40ed62996887 110 // STEP 3: Issue a HTTP GET request
dan_ackme 1:40ed62996887 111 //-------------------------------------------------------------------------
dan_ackme 1:40ed62996887 112
dan_ackme 1:40ed62996887 113 // Initiate a socket with an RX buffer of 256 bytes
dan_ackme 1:40ed62996887 114 // We're not specifying the rx buffer pointer so that means it's dynamically allocated
dan_ackme 3:2bfba274568c 115 WiconnectSocket socket(256);
dan_ackme 1:40ed62996887 116
dan_ackme 1:40ed62996887 117
dan_ackme 1:40ed62996887 118 printf("Issuing HTTP Request: %s\r\n", HTTP_URL);
dan_ackme 1:40ed62996887 119
dan_ackme 1:40ed62996887 120 // Issue HTTP request
dan_ackme 1:40ed62996887 121 // NOTE: the module must have valid network credentials
dan_ackme 1:40ed62996887 122 if(wiconnect.httpGet(socket, HTTP_URL) != WICONNECT_SUCCESS)
dan_ackme 1:40ed62996887 123 {
dan_ackme 11:b7a7a7d3b805 124 printf("Failed to issue HTTP request\r\n");
dan_ackme 1:40ed62996887 125 for(;;); // infinite loop
dan_ackme 1:40ed62996887 126 }
dan_ackme 1:40ed62996887 127
dan_ackme 1:40ed62996887 128 //-------------------------------------------------------------------------
dan_ackme 1:40ed62996887 129 // STEP 4: Read the HTTP page and print
dan_ackme 1:40ed62996887 130 //-------------------------------------------------------------------------
dan_ackme 1:40ed62996887 131
dan_ackme 1:40ed62996887 132 uint8_t *dataPtr;
dan_ackme 1:40ed62996887 133 uint16_t dataLength;
dan_ackme 1:40ed62996887 134
dan_ackme 1:40ed62996887 135 // while there's data to read, retreive and print it
dan_ackme 1:40ed62996887 136 while(socket.read(&dataPtr, &dataLength) == WICONNECT_SUCCESS)
dan_ackme 1:40ed62996887 137 {
dan_ackme 1:40ed62996887 138 fwrite(dataPtr, 1, dataLength, stdout);
dan_ackme 1:40ed62996887 139 }
dan_ackme 1:40ed62996887 140
dan_ackme 1:40ed62996887 141 //-------------------------------------------------------------------------
dan_ackme 1:40ed62996887 142 // STEP 5: Done!
dan_ackme 1:40ed62996887 143 //-------------------------------------------------------------------------
dan_ackme 1:40ed62996887 144
dan_ackme 1:40ed62996887 145 printf("HTTP GET example has completed!\r\n");
dan_ackme 1:40ed62996887 146
dan_ackme 6:f6cf38fba1d4 147 while(true){} // infinite loop
dan_ackme 1:40ed62996887 148 }
dan_ackme 1:40ed62996887 149
dan_ackme 1:40ed62996887 150