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@0:0593b97dec0b, 2018-02-22 (annotated)

Committer:
group-Renesas-Electronics-Corp
Date:
Thu Feb 22 05:44:51 2018 +0000
Revision:
0:0593b97dec0b
Child:
1:67275d54581f
Initial commit

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
group-Renesas-Electronics-Corp 0:0593b97dec0b 20 #define WIFI_ESP8266 1
group-Renesas-Electronics-Corp 0:0593b97dec0b 21 #define WIFI_IDW0XX1 2
group-Renesas-Electronics-Corp 0:0593b97dec0b 22 #define WIFI_ESP32 3
group-Renesas-Electronics-Corp 0:0593b97dec0b 23
group-Renesas-Electronics-Corp 0:0593b97dec0b 24 #if TARGET_UBLOX_EVK_ODIN_W2
group-Renesas-Electronics-Corp 0:0593b97dec0b 25 #include "OdinWiFiInterface.h"
group-Renesas-Electronics-Corp 0:0593b97dec0b 26 OdinWiFiInterface wifi;
group-Renesas-Electronics-Corp 0:0593b97dec0b 27
group-Renesas-Electronics-Corp 0:0593b97dec0b 28 #elif TARGET_REALTEK_RTL8195AM
group-Renesas-Electronics-Corp 0:0593b97dec0b 29 #include "RTWInterface.h"
group-Renesas-Electronics-Corp 0:0593b97dec0b 30 RTWInterface wifi;
group-Renesas-Electronics-Corp 0:0593b97dec0b 31
group-Renesas-Electronics-Corp 0:0593b97dec0b 32 #else // External WiFi modules
group-Renesas-Electronics-Corp 0:0593b97dec0b 33
group-Renesas-Electronics-Corp 0:0593b97dec0b 34 #if MBED_CONF_APP_WIFI_SHIELD == WIFI_ESP8266
group-Renesas-Electronics-Corp 0:0593b97dec0b 35 #include "ESP8266Interface.h"
group-Renesas-Electronics-Corp 0:0593b97dec0b 36 ESP8266Interface wifi(MBED_CONF_APP_WIFI_TX, MBED_CONF_APP_WIFI_RX);
group-Renesas-Electronics-Corp 0:0593b97dec0b 37 #elif MBED_CONF_APP_WIFI_SHIELD == WIFI_IDW0XX1
group-Renesas-Electronics-Corp 0:0593b97dec0b 38 #include "SpwfSAInterface.h"
group-Renesas-Electronics-Corp 0:0593b97dec0b 39 SpwfSAInterface wifi(MBED_CONF_APP_WIFI_TX, MBED_CONF_APP_WIFI_RX);
group-Renesas-Electronics-Corp 0:0593b97dec0b 40 #elif MBED_CONF_APP_WIFI_SHIELD == WIFI_ESP32
group-Renesas-Electronics-Corp 0:0593b97dec0b 41 #include "ESP32Interface.h"
group-Renesas-Electronics-Corp 0:0593b97dec0b 42 ESP32Interface wifi(MBED_CONF_APP_WIFI_EN, MBED_CONF_APP_WIFI_IO0, MBED_CONF_APP_WIFI_TX, MBED_CONF_APP_WIFI_RX);
group-Renesas-Electronics-Corp 0:0593b97dec0b 43 #endif
group-Renesas-Electronics-Corp 0:0593b97dec0b 44
group-Renesas-Electronics-Corp 0:0593b97dec0b 45 #endif
group-Renesas-Electronics-Corp 0:0593b97dec0b 46
group-Renesas-Electronics-Corp 0:0593b97dec0b 47 const char *sec2str(nsapi_security_t sec)
group-Renesas-Electronics-Corp 0:0593b97dec0b 48 {
group-Renesas-Electronics-Corp 0:0593b97dec0b 49 switch (sec) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 50 case NSAPI_SECURITY_NONE:
group-Renesas-Electronics-Corp 0:0593b97dec0b 51 return "None";
group-Renesas-Electronics-Corp 0:0593b97dec0b 52 case NSAPI_SECURITY_WEP:
group-Renesas-Electronics-Corp 0:0593b97dec0b 53 return "WEP";
group-Renesas-Electronics-Corp 0:0593b97dec0b 54 case NSAPI_SECURITY_WPA:
group-Renesas-Electronics-Corp 0:0593b97dec0b 55 return "WPA";
group-Renesas-Electronics-Corp 0:0593b97dec0b 56 case NSAPI_SECURITY_WPA2:
group-Renesas-Electronics-Corp 0:0593b97dec0b 57 return "WPA2";
group-Renesas-Electronics-Corp 0:0593b97dec0b 58 case NSAPI_SECURITY_WPA_WPA2:
group-Renesas-Electronics-Corp 0:0593b97dec0b 59 return "WPA/WPA2";
group-Renesas-Electronics-Corp 0:0593b97dec0b 60 case NSAPI_SECURITY_UNKNOWN:
group-Renesas-Electronics-Corp 0:0593b97dec0b 61 default:
group-Renesas-Electronics-Corp 0:0593b97dec0b 62 return "Unknown";
group-Renesas-Electronics-Corp 0:0593b97dec0b 63 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 64 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 65
group-Renesas-Electronics-Corp 0:0593b97dec0b 66 int scan_demo(WiFiInterface *wifi)
group-Renesas-Electronics-Corp 0:0593b97dec0b 67 {
group-Renesas-Electronics-Corp 0:0593b97dec0b 68 WiFiAccessPoint *ap;
group-Renesas-Electronics-Corp 0:0593b97dec0b 69
group-Renesas-Electronics-Corp 0:0593b97dec0b 70 printf("Scan:\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 71
group-Renesas-Electronics-Corp 0:0593b97dec0b 72 int count = wifi->scan(NULL,0);
group-Renesas-Electronics-Corp 0:0593b97dec0b 73
group-Renesas-Electronics-Corp 0:0593b97dec0b 74 /* Limit number of network arbitrary to 15 */
group-Renesas-Electronics-Corp 0:0593b97dec0b 75 count = count < 15 ? count : 15;
group-Renesas-Electronics-Corp 0:0593b97dec0b 76
group-Renesas-Electronics-Corp 0:0593b97dec0b 77 ap = new WiFiAccessPoint[count];
group-Renesas-Electronics-Corp 0:0593b97dec0b 78 count = wifi->scan(ap, count);
group-Renesas-Electronics-Corp 0:0593b97dec0b 79 for (int i = 0; i < count; i++)
group-Renesas-Electronics-Corp 0:0593b97dec0b 80 {
group-Renesas-Electronics-Corp 0:0593b97dec0b 81 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 82 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 83 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 84 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 85 printf("%d networks available.\n", count);
group-Renesas-Electronics-Corp 0:0593b97dec0b 86
group-Renesas-Electronics-Corp 0:0593b97dec0b 87 delete[] ap;
group-Renesas-Electronics-Corp 0:0593b97dec0b 88 return count;
group-Renesas-Electronics-Corp 0:0593b97dec0b 89 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 90
group-Renesas-Electronics-Corp 0:0593b97dec0b 91 void http_demo(NetworkInterface *net)
group-Renesas-Electronics-Corp 0:0593b97dec0b 92 {
group-Renesas-Electronics-Corp 0:0593b97dec0b 93 TCPSocket socket;
group-Renesas-Electronics-Corp 0:0593b97dec0b 94 nsapi_error_t response;
group-Renesas-Electronics-Corp 0:0593b97dec0b 95
group-Renesas-Electronics-Corp 0:0593b97dec0b 96 printf("Sending HTTP request to www.arm.com...\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 97
group-Renesas-Electronics-Corp 0:0593b97dec0b 98 // Open a socket on the network interface, and create a TCP connection to www.arm.com
group-Renesas-Electronics-Corp 0:0593b97dec0b 99 socket.open(net);
group-Renesas-Electronics-Corp 0:0593b97dec0b 100
group-Renesas-Electronics-Corp 0:0593b97dec0b 101 response = socket.connect("www.arm.com", 80);
group-Renesas-Electronics-Corp 0:0593b97dec0b 102 if(0 != response) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 103 printf("Error connecting: %d\n", response);
group-Renesas-Electronics-Corp 0:0593b97dec0b 104 socket.close();
group-Renesas-Electronics-Corp 0:0593b97dec0b 105 return;
group-Renesas-Electronics-Corp 0:0593b97dec0b 106 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 107
group-Renesas-Electronics-Corp 0:0593b97dec0b 108 // Send a simple http request
group-Renesas-Electronics-Corp 0:0593b97dec0b 109 char sbuffer[] = "GET / HTTP/1.1\r\nHost: www.arm.com\r\n\r\n";
group-Renesas-Electronics-Corp 0:0593b97dec0b 110 nsapi_size_t size = strlen(sbuffer);
group-Renesas-Electronics-Corp 0:0593b97dec0b 111 response = 0;
group-Renesas-Electronics-Corp 0:0593b97dec0b 112 while(size)
group-Renesas-Electronics-Corp 0:0593b97dec0b 113 {
group-Renesas-Electronics-Corp 0:0593b97dec0b 114 response = socket.send(sbuffer+response, size);
group-Renesas-Electronics-Corp 0:0593b97dec0b 115 if (response < 0) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 116 printf("Error sending data: %d\n", response);
group-Renesas-Electronics-Corp 0:0593b97dec0b 117 socket.close();
group-Renesas-Electronics-Corp 0:0593b97dec0b 118 return;
group-Renesas-Electronics-Corp 0:0593b97dec0b 119 } else {
group-Renesas-Electronics-Corp 0:0593b97dec0b 120 size -= response;
group-Renesas-Electronics-Corp 0:0593b97dec0b 121 // Check if entire message was sent or not
group-Renesas-Electronics-Corp 0:0593b97dec0b 122 printf("sent %d [%.*s]\n", response, strstr(sbuffer, "\r\n")-sbuffer, sbuffer);
group-Renesas-Electronics-Corp 0:0593b97dec0b 123 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 124 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 125
group-Renesas-Electronics-Corp 0:0593b97dec0b 126 // Recieve a simple http response and print out the response line
group-Renesas-Electronics-Corp 0:0593b97dec0b 127 char rbuffer[64];
group-Renesas-Electronics-Corp 0:0593b97dec0b 128 response = socket.recv(rbuffer, sizeof rbuffer);
group-Renesas-Electronics-Corp 0:0593b97dec0b 129 if (response < 0) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 130 printf("Error receiving data: %d\n", response);
group-Renesas-Electronics-Corp 0:0593b97dec0b 131 } else {
group-Renesas-Electronics-Corp 0:0593b97dec0b 132 printf("recv %d [%.*s]\n", response, strstr(rbuffer, "\r\n")-rbuffer, rbuffer);
group-Renesas-Electronics-Corp 0:0593b97dec0b 133 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 134
group-Renesas-Electronics-Corp 0:0593b97dec0b 135 // Close the socket to return its memory and bring down the network interface
group-Renesas-Electronics-Corp 0:0593b97dec0b 136 socket.close();
group-Renesas-Electronics-Corp 0:0593b97dec0b 137 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 138
group-Renesas-Electronics-Corp 0:0593b97dec0b 139 int main()
group-Renesas-Electronics-Corp 0:0593b97dec0b 140 {
group-Renesas-Electronics-Corp 0:0593b97dec0b 141 int count = 0;
group-Renesas-Electronics-Corp 0:0593b97dec0b 142
group-Renesas-Electronics-Corp 0:0593b97dec0b 143 printf("WiFi example\n\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 144
group-Renesas-Electronics-Corp 0:0593b97dec0b 145 count = scan_demo(&wifi);
group-Renesas-Electronics-Corp 0:0593b97dec0b 146 if (count == 0) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 147 printf("No WIFI APNs found - can't continue further.\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 148 return -1;
group-Renesas-Electronics-Corp 0:0593b97dec0b 149 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 150
group-Renesas-Electronics-Corp 0:0593b97dec0b 151 printf("\nConnecting to %s...\n", MBED_CONF_APP_WIFI_SSID);
group-Renesas-Electronics-Corp 0:0593b97dec0b 152 int ret = wifi.connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA_WPA2);
group-Renesas-Electronics-Corp 0:0593b97dec0b 153 if (ret != 0) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 154 printf("\nConnection error\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 155 return -1;
group-Renesas-Electronics-Corp 0:0593b97dec0b 156 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 157
group-Renesas-Electronics-Corp 0:0593b97dec0b 158 printf("Success\n\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 159 printf("MAC: %s\n", wifi.get_mac_address());
group-Renesas-Electronics-Corp 0:0593b97dec0b 160 printf("IP: %s\n", wifi.get_ip_address());
group-Renesas-Electronics-Corp 0:0593b97dec0b 161 printf("Netmask: %s\n", wifi.get_netmask());
group-Renesas-Electronics-Corp 0:0593b97dec0b 162 printf("Gateway: %s\n", wifi.get_gateway());
group-Renesas-Electronics-Corp 0:0593b97dec0b 163 printf("RSSI: %d\n\n", wifi.get_rssi());
group-Renesas-Electronics-Corp 0:0593b97dec0b 164
group-Renesas-Electronics-Corp 0:0593b97dec0b 165 http_demo(&wifi);
group-Renesas-Electronics-Corp 0:0593b97dec0b 166
group-Renesas-Electronics-Corp 0:0593b97dec0b 167 wifi.disconnect();
group-Renesas-Electronics-Corp 0:0593b97dec0b 168
group-Renesas-Electronics-Corp 0:0593b97dec0b 169 printf("\nDone\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 170 }