Renesas / Mbed OS mbed-os-example-wifi

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

This is an example of a Wi-Fi application using the Wi-Fi and network socket APIs that Mbed OS provides.

The program brings up the Wi-Fi and the underlying network interface and uses it to scan available networks, connects to a network, prints interface and connection details and performs an HTTP operation.

For more information about Wi-Fi APIs, please visit the Mbed OS Wi-Fi documentation.

This example has been used on the following platforms

main.cpp@7:ab1ae55ec482, 2018-12-12 (annotated)

Committer:
1050186
Date:
Wed Dec 12 05:42:30 2018 +0000
Revision:
7:ab1ae55ec482
Parent:
5:01be82512f7a 
Delete unnecessary files

Who changed what in which revision?

UserRevisionLine numberNew contents of line
group-Renesas-Electronics-Corp 0:0593b97dec0b 1 /* WiFi Example
group-Renesas-Electronics-Corp 0:0593b97dec0b 2 * Copyright (c) 2016 ARM Limited
group-Renesas-Electronics-Corp 0:0593b97dec0b 3 *
group-Renesas-Electronics-Corp 0:0593b97dec0b 4 * Licensed under the Apache License, Version 2.0 (the "License");
group-Renesas-Electronics-Corp 0:0593b97dec0b 5 * you may not use this file except in compliance with the License.
group-Renesas-Electronics-Corp 0:0593b97dec0b 6 * You may obtain a copy of the License at
group-Renesas-Electronics-Corp 0:0593b97dec0b 7 *
group-Renesas-Electronics-Corp 0:0593b97dec0b 8 * http://www.apache.org/licenses/LICENSE-2.0
group-Renesas-Electronics-Corp 0:0593b97dec0b 9 *
group-Renesas-Electronics-Corp 0:0593b97dec0b 10 * Unless required by applicable law or agreed to in writing, software
group-Renesas-Electronics-Corp 0:0593b97dec0b 11 * distributed under the License is distributed on an "AS IS" BASIS,
group-Renesas-Electronics-Corp 0:0593b97dec0b 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
group-Renesas-Electronics-Corp 0:0593b97dec0b 13 * See the License for the specific language governing permissions and
group-Renesas-Electronics-Corp 0:0593b97dec0b 14 * limitations under the License.
group-Renesas-Electronics-Corp 0:0593b97dec0b 15 */
group-Renesas-Electronics-Corp 0:0593b97dec0b 16
group-Renesas-Electronics-Corp 0:0593b97dec0b 17 #include "mbed.h"
group-Renesas-Electronics-Corp 0:0593b97dec0b 18 #include "TCPSocket.h"
group-Renesas-Electronics-Corp 0:0593b97dec0b 19
1050186 5:01be82512f7a 20 WiFiInterface *wifi;
group-Renesas-Electronics-Corp 0:0593b97dec0b 21
group-Renesas-Electronics-Corp 0:0593b97dec0b 22 const char *sec2str(nsapi_security_t sec)
group-Renesas-Electronics-Corp 0:0593b97dec0b 23 {
group-Renesas-Electronics-Corp 0:0593b97dec0b 24 switch (sec) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 25 case NSAPI_SECURITY_NONE:
group-Renesas-Electronics-Corp 0:0593b97dec0b 26 return "None";
group-Renesas-Electronics-Corp 0:0593b97dec0b 27 case NSAPI_SECURITY_WEP:
group-Renesas-Electronics-Corp 0:0593b97dec0b 28 return "WEP";
group-Renesas-Electronics-Corp 0:0593b97dec0b 29 case NSAPI_SECURITY_WPA:
group-Renesas-Electronics-Corp 0:0593b97dec0b 30 return "WPA";
group-Renesas-Electronics-Corp 0:0593b97dec0b 31 case NSAPI_SECURITY_WPA2:
group-Renesas-Electronics-Corp 0:0593b97dec0b 32 return "WPA2";
group-Renesas-Electronics-Corp 0:0593b97dec0b 33 case NSAPI_SECURITY_WPA_WPA2:
group-Renesas-Electronics-Corp 0:0593b97dec0b 34 return "WPA/WPA2";
group-Renesas-Electronics-Corp 0:0593b97dec0b 35 case NSAPI_SECURITY_UNKNOWN:
group-Renesas-Electronics-Corp 0:0593b97dec0b 36 default:
group-Renesas-Electronics-Corp 0:0593b97dec0b 37 return "Unknown";
group-Renesas-Electronics-Corp 0:0593b97dec0b 38 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 39 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 40
group-Renesas-Electronics-Corp 0:0593b97dec0b 41 int scan_demo(WiFiInterface *wifi)
group-Renesas-Electronics-Corp 0:0593b97dec0b 42 {
group-Renesas-Electronics-Corp 0:0593b97dec0b 43 WiFiAccessPoint *ap;
group-Renesas-Electronics-Corp 0:0593b97dec0b 44
group-Renesas-Electronics-Corp 0:0593b97dec0b 45 printf("Scan:\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 46
group-Renesas-Electronics-Corp 0:0593b97dec0b 47 int count = wifi->scan(NULL,0);
group-Renesas-Electronics-Corp 0:0593b97dec0b 48
1050186 5:01be82512f7a 49 if (count <= 0) {
1050186 5:01be82512f7a 50 printf("scan() failed with return value: %d\n", count);
1050186 5:01be82512f7a 51 return 0;
1050186 5:01be82512f7a 52 }
1050186 5:01be82512f7a 53
group-Renesas-Electronics-Corp 0:0593b97dec0b 54 /* Limit number of network arbitrary to 15 */
group-Renesas-Electronics-Corp 0:0593b97dec0b 55 count = count < 15 ? count : 15;
group-Renesas-Electronics-Corp 0:0593b97dec0b 56
group-Renesas-Electronics-Corp 0:0593b97dec0b 57 ap = new WiFiAccessPoint[count];
group-Renesas-Electronics-Corp 0:0593b97dec0b 58 count = wifi->scan(ap, count);
1050186 5:01be82512f7a 59
1050186 5:01be82512f7a 60 if (count <= 0) {
1050186 5:01be82512f7a 61 printf("scan() failed with return value: %d\n", count);
1050186 5:01be82512f7a 62 return 0;
1050186 5:01be82512f7a 63 }
1050186 5:01be82512f7a 64
1050186 5:01be82512f7a 65 for (int i = 0; i < count; i++) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 66 printf("Network: %s secured: %s BSSID: %hhX:%hhX:%hhX:%hhx:%hhx:%hhx RSSI: %hhd Ch: %hhd\n", ap[i].get_ssid(),
group-Renesas-Electronics-Corp 0:0593b97dec0b 67 sec2str(ap[i].get_security()), ap[i].get_bssid()[0], ap[i].get_bssid()[1], ap[i].get_bssid()[2],
group-Renesas-Electronics-Corp 0:0593b97dec0b 68 ap[i].get_bssid()[3], ap[i].get_bssid()[4], ap[i].get_bssid()[5], ap[i].get_rssi(), ap[i].get_channel());
group-Renesas-Electronics-Corp 0:0593b97dec0b 69 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 70 printf("%d networks available.\n", count);
group-Renesas-Electronics-Corp 0:0593b97dec0b 71
group-Renesas-Electronics-Corp 0:0593b97dec0b 72 delete[] ap;
group-Renesas-Electronics-Corp 0:0593b97dec0b 73 return count;
group-Renesas-Electronics-Corp 0:0593b97dec0b 74 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 75
group-Renesas-Electronics-Corp 0:0593b97dec0b 76 void http_demo(NetworkInterface *net)
group-Renesas-Electronics-Corp 0:0593b97dec0b 77 {
group-Renesas-Electronics-Corp 0:0593b97dec0b 78 TCPSocket socket;
group-Renesas-Electronics-Corp 0:0593b97dec0b 79 nsapi_error_t response;
group-Renesas-Electronics-Corp 0:0593b97dec0b 80
group-Renesas-Electronics-Corp 0:0593b97dec0b 81 printf("Sending HTTP request to www.arm.com...\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 82
group-Renesas-Electronics-Corp 0:0593b97dec0b 83 // Open a socket on the network interface, and create a TCP connection to www.arm.com
1050186 5:01be82512f7a 84 response = socket.open(net);
1050186 5:01be82512f7a 85 if(0 != response) {
1050186 5:01be82512f7a 86 printf("socket.open() failed: %d\n", response);
1050186 5:01be82512f7a 87 return;
1050186 5:01be82512f7a 88 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 89
1050186 5:01be82512f7a 90 response = socket.connect("api.ipify.org", 80);
group-Renesas-Electronics-Corp 0:0593b97dec0b 91 if(0 != response) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 92 printf("Error connecting: %d\n", response);
group-Renesas-Electronics-Corp 0:0593b97dec0b 93 socket.close();
group-Renesas-Electronics-Corp 0:0593b97dec0b 94 return;
group-Renesas-Electronics-Corp 0:0593b97dec0b 95 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 96
group-Renesas-Electronics-Corp 0:0593b97dec0b 97 // Send a simple http request
1050186 5:01be82512f7a 98 char sbuffer[] = "GET / HTTP/1.1\r\nHost: api.ipify.org\r\nConnection: close\r\n\r\n";
group-Renesas-Electronics-Corp 0:0593b97dec0b 99 nsapi_size_t size = strlen(sbuffer);
1050186 5:01be82512f7a 100
1050186 5:01be82512f7a 101 // Loop until whole request send
1050186 5:01be82512f7a 102 while(size) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 103 response = socket.send(sbuffer+response, size);
group-Renesas-Electronics-Corp 0:0593b97dec0b 104 if (response < 0) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 105 printf("Error sending data: %d\n", response);
group-Renesas-Electronics-Corp 0:0593b97dec0b 106 socket.close();
group-Renesas-Electronics-Corp 0:0593b97dec0b 107 return;
group-Renesas-Electronics-Corp 0:0593b97dec0b 108 }
1050186 5:01be82512f7a 109 size -= response;
1050186 5:01be82512f7a 110 printf("sent %d [%.*s]\n", response, strstr(sbuffer, "\r\n")-sbuffer, sbuffer);
group-Renesas-Electronics-Corp 0:0593b97dec0b 111 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 112
1050186 5:01be82512f7a 113 // Receieve a simple http response and print out the response line
group-Renesas-Electronics-Corp 0:0593b97dec0b 114 char rbuffer[64];
group-Renesas-Electronics-Corp 0:0593b97dec0b 115 response = socket.recv(rbuffer, sizeof rbuffer);
group-Renesas-Electronics-Corp 0:0593b97dec0b 116 if (response < 0) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 117 printf("Error receiving data: %d\n", response);
group-Renesas-Electronics-Corp 0:0593b97dec0b 118 } else {
group-Renesas-Electronics-Corp 0:0593b97dec0b 119 printf("recv %d [%.*s]\n", response, strstr(rbuffer, "\r\n")-rbuffer, rbuffer);
group-Renesas-Electronics-Corp 0:0593b97dec0b 120 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 121
group-Renesas-Electronics-Corp 0:0593b97dec0b 122 // Close the socket to return its memory and bring down the network interface
group-Renesas-Electronics-Corp 0:0593b97dec0b 123 socket.close();
group-Renesas-Electronics-Corp 0:0593b97dec0b 124 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 125
group-Renesas-Electronics-Corp 0:0593b97dec0b 126 int main()
group-Renesas-Electronics-Corp 0:0593b97dec0b 127 {
group-Renesas-Electronics-Corp 0:0593b97dec0b 128 int count = 0;
group-Renesas-Electronics-Corp 0:0593b97dec0b 129
1050186 5:01be82512f7a 130 printf("WiFi example\n");
1050186 5:01be82512f7a 131
1050186 5:01be82512f7a 132 #ifdef MBED_MAJOR_VERSION
1050186 5:01be82512f7a 133 printf("Mbed OS version %d.%d.%d\n\n", MBED_MAJOR_VERSION, MBED_MINOR_VERSION, MBED_PATCH_VERSION);
1050186 5:01be82512f7a 134 #endif
group-Renesas-Electronics-Corp 0:0593b97dec0b 135
1050186 5:01be82512f7a 136 wifi = WiFiInterface::get_default_instance();
1050186 5:01be82512f7a 137 if (!wifi) {
1050186 5:01be82512f7a 138 printf("ERROR: No WiFiInterface found.\n");
1050186 5:01be82512f7a 139 return -1;
1050186 5:01be82512f7a 140 }
1050186 5:01be82512f7a 141
1050186 5:01be82512f7a 142 count = scan_demo(wifi);
group-Renesas-Electronics-Corp 0:0593b97dec0b 143 if (count == 0) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 144 printf("No WIFI APNs found - can't continue further.\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 145 return -1;
group-Renesas-Electronics-Corp 0:0593b97dec0b 146 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 147
group-Renesas-Electronics-Corp 0:0593b97dec0b 148 printf("\nConnecting to %s...\n", MBED_CONF_APP_WIFI_SSID);
1050186 5:01be82512f7a 149 int ret = wifi->connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA_WPA2);
group-Renesas-Electronics-Corp 0:0593b97dec0b 150 if (ret != 0) {
1050186 5:01be82512f7a 151 printf("\nConnection error: %d\n", ret);
group-Renesas-Electronics-Corp 0:0593b97dec0b 152 return -1;
group-Renesas-Electronics-Corp 0:0593b97dec0b 153 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 154
group-Renesas-Electronics-Corp 0:0593b97dec0b 155 printf("Success\n\n");
1050186 5:01be82512f7a 156 printf("MAC: %s\n", wifi->get_mac_address());
1050186 5:01be82512f7a 157 printf("IP: %s\n", wifi->get_ip_address());
1050186 5:01be82512f7a 158 printf("Netmask: %s\n", wifi->get_netmask());
1050186 5:01be82512f7a 159 printf("Gateway: %s\n", wifi->get_gateway());
1050186 5:01be82512f7a 160 printf("RSSI: %d\n\n", wifi->get_rssi());
group-Renesas-Electronics-Corp 0:0593b97dec0b 161
1050186 5:01be82512f7a 162 http_demo(wifi);
group-Renesas-Electronics-Corp 0:0593b97dec0b 163
1050186 5:01be82512f7a 164 wifi->disconnect();
group-Renesas-Electronics-Corp 0:0593b97dec0b 165
group-Renesas-Electronics-Corp 0:0593b97dec0b 166 printf("\nDone\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 167 }