WiFi example for mbed OS, fork from https://github.com/ARMmbed/mbed-os-example-wifi

This is a quick example of a simple WiFi application using the WiFi and network-socket APIs that is provided as a part of mbed-os

The program brings up the WiFi and the underlying network interface, and uses it to scans available networks, connects to a network, prints interface and connection details and performs simple HTTP operation.

This example has been used on the following platforms

Note: The ISM43362 WIFI Driver developed by ST Team can also be integrated in the mbed-os-example-client example.

DISCO_L475VG_IOT01A DISCO_F413ZH

Committer:
adustm
Date:
Tue Feb 27 14:07:49 2018 +0100
Revision:
58:8d4bde75ebb9
Parent:
57:c8c960b825f0
Add DISCO_F413ZH (using ism43362 driver)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:857719181846 1 /* WiFi Example
adustm 57:c8c960b825f0 2 * Copyright (c) 2018 ARM Limited
mbed_official 0:857719181846 3 *
mbed_official 0:857719181846 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 0:857719181846 5 * you may not use this file except in compliance with the License.
mbed_official 0:857719181846 6 * You may obtain a copy of the License at
mbed_official 0:857719181846 7 *
mbed_official 0:857719181846 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 0:857719181846 9 *
mbed_official 0:857719181846 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 0:857719181846 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 0:857719181846 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 0:857719181846 13 * See the License for the specific language governing permissions and
mbed_official 0:857719181846 14 * limitations under the License.
mbed_official 0:857719181846 15 */
mbed_official 0:857719181846 16
mbed_official 0:857719181846 17 #include "mbed.h"
mbed_official 0:857719181846 18 #include "TCPSocket.h"
mbed_official 0:857719181846 19
mbed_official 44:63be19b7a3db 20 #define WIFI_IDW0XX1 2
mbed_official 32:bca3f5f442b3 21
adustm 58:8d4bde75ebb9 22 #if (defined(TARGET_DISCO_L475VG_IOT01A) || defined(TARGET_DISCO_F413ZH))
adustm adustm@gmail.com 55:23a0d1e8270a 23 #include "ISM43362Interface.h"
adustm adustm@gmail.com 55:23a0d1e8270a 24 ISM43362Interface wifi(MBED_CONF_APP_WIFI_SPI_MOSI, MBED_CONF_APP_WIFI_SPI_MISO, MBED_CONF_APP_WIFI_SPI_SCLK, MBED_CONF_APP_WIFI_SPI_NSS, MBED_CONF_APP_WIFI_RESET, MBED_CONF_APP_WIFI_DATAREADY, MBED_CONF_APP_WIFI_WAKEUP, false);
adustm adustm@gmail.com 55:23a0d1e8270a 25
mbed_official 33:12f0df4d51d7 26 #else // External WiFi modules
mbed_official 21:b2f2f6a840b4 27
adustm 57:c8c960b825f0 28 #if MBED_CONF_APP_WIFI_SHIELD == WIFI_IDW0XX1
mbed_official 32:bca3f5f442b3 29 #include "SpwfSAInterface.h"
mbed_official 32:bca3f5f442b3 30 SpwfSAInterface wifi(MBED_CONF_APP_WIFI_TX, MBED_CONF_APP_WIFI_RX);
mbed_official 44:63be19b7a3db 31 #endif // MBED_CONF_APP_WIFI_SHIELD == WIFI_IDW0XX1
mbed_official 10:5b5beb106156 32
mbed_official 33:12f0df4d51d7 33 #endif
mbed_official 0:857719181846 34
mbed_official 0:857719181846 35 const char *sec2str(nsapi_security_t sec)
mbed_official 0:857719181846 36 {
mbed_official 0:857719181846 37 switch (sec) {
mbed_official 0:857719181846 38 case NSAPI_SECURITY_NONE:
mbed_official 0:857719181846 39 return "None";
mbed_official 0:857719181846 40 case NSAPI_SECURITY_WEP:
mbed_official 0:857719181846 41 return "WEP";
mbed_official 0:857719181846 42 case NSAPI_SECURITY_WPA:
mbed_official 0:857719181846 43 return "WPA";
mbed_official 0:857719181846 44 case NSAPI_SECURITY_WPA2:
mbed_official 0:857719181846 45 return "WPA2";
mbed_official 0:857719181846 46 case NSAPI_SECURITY_WPA_WPA2:
mbed_official 0:857719181846 47 return "WPA/WPA2";
mbed_official 0:857719181846 48 case NSAPI_SECURITY_UNKNOWN:
mbed_official 0:857719181846 49 default:
mbed_official 0:857719181846 50 return "Unknown";
mbed_official 0:857719181846 51 }
mbed_official 0:857719181846 52 }
mbed_official 0:857719181846 53
mbed_official 37:3a31525e2971 54 int scan_demo(WiFiInterface *wifi)
mbed_official 0:857719181846 55 {
mbed_official 0:857719181846 56 WiFiAccessPoint *ap;
mbed_official 0:857719181846 57
mbed_official 35:052c1ba06ce7 58 printf("Scan:\n");
mbed_official 0:857719181846 59
mbed_official 0:857719181846 60 int count = wifi->scan(NULL,0);
adustm adustm@gmail.com 55:23a0d1e8270a 61 printf("%d networks available.\n", count);
mbed_official 0:857719181846 62
mbed_official 0:857719181846 63 /* Limit number of network arbitrary to 15 */
mbed_official 0:857719181846 64 count = count < 15 ? count : 15;
mbed_official 0:857719181846 65
mbed_official 0:857719181846 66 ap = new WiFiAccessPoint[count];
mbed_official 0:857719181846 67 count = wifi->scan(ap, count);
mbed_official 0:857719181846 68 for (int i = 0; i < count; i++)
mbed_official 0:857719181846 69 {
mbed_official 35:052c1ba06ce7 70 printf("Network: %s secured: %s BSSID: %hhX:%hhX:%hhX:%hhx:%hhx:%hhx RSSI: %hhd Ch: %hhd\n", ap[i].get_ssid(),
mbed_official 0:857719181846 71 sec2str(ap[i].get_security()), ap[i].get_bssid()[0], ap[i].get_bssid()[1], ap[i].get_bssid()[2],
mbed_official 0:857719181846 72 ap[i].get_bssid()[3], ap[i].get_bssid()[4], ap[i].get_bssid()[5], ap[i].get_rssi(), ap[i].get_channel());
mbed_official 0:857719181846 73 }
mbed_official 0:857719181846 74
mbed_official 0:857719181846 75 delete[] ap;
mbed_official 37:3a31525e2971 76 return count;
mbed_official 0:857719181846 77 }
mbed_official 0:857719181846 78
mbed_official 0:857719181846 79 void http_demo(NetworkInterface *net)
mbed_official 0:857719181846 80 {
mbed_official 0:857719181846 81 TCPSocket socket;
mbed_official 24:323569a565ec 82 nsapi_error_t response;
mbed_official 0:857719181846 83
mbed_official 35:052c1ba06ce7 84 printf("Sending HTTP request to www.arm.com...\n");
mbed_official 0:857719181846 85
mbed_official 0:857719181846 86 // Open a socket on the network interface, and create a TCP connection to www.arm.com
mbed_official 0:857719181846 87 socket.open(net);
mbed_official 24:323569a565ec 88 response = socket.connect("www.arm.com", 80);
mbed_official 24:323569a565ec 89 if(0 != response) {
mbed_official 35:052c1ba06ce7 90 printf("Error connecting: %d\n", response);
mbed_official 24:323569a565ec 91 socket.close();
mbed_official 24:323569a565ec 92 return;
mbed_official 24:323569a565ec 93 }
mbed_official 0:857719181846 94
mbed_official 0:857719181846 95 // Send a simple http request
mbed_official 0:857719181846 96 char sbuffer[] = "GET / HTTP/1.1\r\nHost: www.arm.com\r\n\r\n";
mbed_official 33:12f0df4d51d7 97 nsapi_size_t size = strlen(sbuffer);
mbed_official 24:323569a565ec 98 response = 0;
mbed_official 24:323569a565ec 99 while(size)
mbed_official 24:323569a565ec 100 {
mbed_official 24:323569a565ec 101 response = socket.send(sbuffer+response, size);
mbed_official 24:323569a565ec 102 if (response < 0) {
mbed_official 35:052c1ba06ce7 103 printf("Error sending data: %d\n", response);
mbed_official 24:323569a565ec 104 socket.close();
mbed_official 24:323569a565ec 105 return;
mbed_official 24:323569a565ec 106 } else {
mbed_official 24:323569a565ec 107 size -= response;
mbed_official 24:323569a565ec 108 // Check if entire message was sent or not
mbed_official 35:052c1ba06ce7 109 printf("sent %d [%.*s]\n", response, strstr(sbuffer, "\r\n")-sbuffer, sbuffer);
mbed_official 24:323569a565ec 110 }
mbed_official 24:323569a565ec 111 }
mbed_official 0:857719181846 112
mbed_official 0:857719181846 113 // Recieve a simple http response and print out the response line
mbed_official 0:857719181846 114 char rbuffer[64];
mbed_official 24:323569a565ec 115 response = socket.recv(rbuffer, sizeof rbuffer);
mbed_official 24:323569a565ec 116 if (response < 0) {
mbed_official 35:052c1ba06ce7 117 printf("Error receiving data: %d\n", response);
mbed_official 24:323569a565ec 118 } else {
mbed_official 35:052c1ba06ce7 119 printf("recv %d [%.*s]\n", response, strstr(rbuffer, "\r\n")-rbuffer, rbuffer);
mbed_official 24:323569a565ec 120 }
mbed_official 0:857719181846 121
mbed_official 0:857719181846 122 // Close the socket to return its memory and bring down the network interface
mbed_official 0:857719181846 123 socket.close();
mbed_official 0:857719181846 124 }
mbed_official 0:857719181846 125
mbed_official 0:857719181846 126 int main()
mbed_official 0:857719181846 127 {
mbed_official 37:3a31525e2971 128 int count = 0;
mbed_official 37:3a31525e2971 129
mbed_official 35:052c1ba06ce7 130 printf("WiFi example\n\n");
mbed_official 0:857719181846 131
mbed_official 37:3a31525e2971 132 count = scan_demo(&wifi);
mbed_official 37:3a31525e2971 133 if (count == 0) {
mbed_official 37:3a31525e2971 134 printf("No WIFI APNs found - can't continue further.\n");
mbed_official 37:3a31525e2971 135 return -1;
mbed_official 37:3a31525e2971 136 }
mbed_official 0:857719181846 137
mbed_official 37:3a31525e2971 138 printf("\nConnecting to %s...\n", MBED_CONF_APP_WIFI_SSID);
mbed_official 0:857719181846 139 int ret = wifi.connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA_WPA2);
mbed_official 0:857719181846 140 if (ret != 0) {
mbed_official 35:052c1ba06ce7 141 printf("\nConnection error\n");
mbed_official 0:857719181846 142 return -1;
mbed_official 0:857719181846 143 }
mbed_official 0:857719181846 144
mbed_official 35:052c1ba06ce7 145 printf("Success\n\n");
mbed_official 35:052c1ba06ce7 146 printf("MAC: %s\n", wifi.get_mac_address());
mbed_official 35:052c1ba06ce7 147 printf("IP: %s\n", wifi.get_ip_address());
mbed_official 35:052c1ba06ce7 148 printf("Netmask: %s\n", wifi.get_netmask());
mbed_official 35:052c1ba06ce7 149 printf("Gateway: %s\n", wifi.get_gateway());
mbed_official 35:052c1ba06ce7 150 printf("RSSI: %d\n\n", wifi.get_rssi());
mbed_official 0:857719181846 151
mbed_official 0:857719181846 152 http_demo(&wifi);
mbed_official 0:857719181846 153
mbed_official 0:857719181846 154 wifi.disconnect();
mbed_official 0:857719181846 155
mbed_official 35:052c1ba06ce7 156 printf("\nDone\n");
mbed_official 0:857719181846 157 }