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@1:67275d54581f, 2018-02-22 (annotated)

Committer:
dkato
Date:
Thu Feb 22 08:32:38 2018 +0000
Revision:
1:67275d54581f
Parent:
0:0593b97dec0b
Child:
5:01be82512f7a
Update main.cpp / mbed_app.json

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
dkato 1:67275d54581f 32 #elif TARGET_GR_LYCHEE
dkato 1:67275d54581f 33 #include "ESP32Interface.h"
dkato 1:67275d54581f 34 ESP32Interface wifi(P5_3, P3_14, P7_1, P0_1);
dkato 1:67275d54581f 35
group-Renesas-Electronics-Corp 0:0593b97dec0b 36 #else // External WiFi modules
group-Renesas-Electronics-Corp 0:0593b97dec0b 37
group-Renesas-Electronics-Corp 0:0593b97dec0b 38 #if MBED_CONF_APP_WIFI_SHIELD == WIFI_ESP8266
group-Renesas-Electronics-Corp 0:0593b97dec0b 39 #include "ESP8266Interface.h"
group-Renesas-Electronics-Corp 0:0593b97dec0b 40 ESP8266Interface wifi(MBED_CONF_APP_WIFI_TX, MBED_CONF_APP_WIFI_RX);
group-Renesas-Electronics-Corp 0:0593b97dec0b 41 #elif MBED_CONF_APP_WIFI_SHIELD == WIFI_IDW0XX1
group-Renesas-Electronics-Corp 0:0593b97dec0b 42 #include "SpwfSAInterface.h"
group-Renesas-Electronics-Corp 0:0593b97dec0b 43 SpwfSAInterface wifi(MBED_CONF_APP_WIFI_TX, MBED_CONF_APP_WIFI_RX);
group-Renesas-Electronics-Corp 0:0593b97dec0b 44 #elif MBED_CONF_APP_WIFI_SHIELD == WIFI_ESP32
group-Renesas-Electronics-Corp 0:0593b97dec0b 45 #include "ESP32Interface.h"
group-Renesas-Electronics-Corp 0:0593b97dec0b 46 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 47 #endif
group-Renesas-Electronics-Corp 0:0593b97dec0b 48
group-Renesas-Electronics-Corp 0:0593b97dec0b 49 #endif
group-Renesas-Electronics-Corp 0:0593b97dec0b 50
group-Renesas-Electronics-Corp 0:0593b97dec0b 51 const char *sec2str(nsapi_security_t sec)
group-Renesas-Electronics-Corp 0:0593b97dec0b 52 {
group-Renesas-Electronics-Corp 0:0593b97dec0b 53 switch (sec) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 54 case NSAPI_SECURITY_NONE:
group-Renesas-Electronics-Corp 0:0593b97dec0b 55 return "None";
group-Renesas-Electronics-Corp 0:0593b97dec0b 56 case NSAPI_SECURITY_WEP:
group-Renesas-Electronics-Corp 0:0593b97dec0b 57 return "WEP";
group-Renesas-Electronics-Corp 0:0593b97dec0b 58 case NSAPI_SECURITY_WPA:
group-Renesas-Electronics-Corp 0:0593b97dec0b 59 return "WPA";
group-Renesas-Electronics-Corp 0:0593b97dec0b 60 case NSAPI_SECURITY_WPA2:
group-Renesas-Electronics-Corp 0:0593b97dec0b 61 return "WPA2";
group-Renesas-Electronics-Corp 0:0593b97dec0b 62 case NSAPI_SECURITY_WPA_WPA2:
group-Renesas-Electronics-Corp 0:0593b97dec0b 63 return "WPA/WPA2";
group-Renesas-Electronics-Corp 0:0593b97dec0b 64 case NSAPI_SECURITY_UNKNOWN:
group-Renesas-Electronics-Corp 0:0593b97dec0b 65 default:
group-Renesas-Electronics-Corp 0:0593b97dec0b 66 return "Unknown";
group-Renesas-Electronics-Corp 0:0593b97dec0b 67 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 68 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 69
group-Renesas-Electronics-Corp 0:0593b97dec0b 70 int scan_demo(WiFiInterface *wifi)
group-Renesas-Electronics-Corp 0:0593b97dec0b 71 {
group-Renesas-Electronics-Corp 0:0593b97dec0b 72 WiFiAccessPoint *ap;
group-Renesas-Electronics-Corp 0:0593b97dec0b 73
group-Renesas-Electronics-Corp 0:0593b97dec0b 74 printf("Scan:\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 75
group-Renesas-Electronics-Corp 0:0593b97dec0b 76 int count = wifi->scan(NULL,0);
group-Renesas-Electronics-Corp 0:0593b97dec0b 77
group-Renesas-Electronics-Corp 0:0593b97dec0b 78 /* Limit number of network arbitrary to 15 */
group-Renesas-Electronics-Corp 0:0593b97dec0b 79 count = count < 15 ? count : 15;
group-Renesas-Electronics-Corp 0:0593b97dec0b 80
group-Renesas-Electronics-Corp 0:0593b97dec0b 81 ap = new WiFiAccessPoint[count];
group-Renesas-Electronics-Corp 0:0593b97dec0b 82 count = wifi->scan(ap, count);
group-Renesas-Electronics-Corp 0:0593b97dec0b 83 for (int i = 0; i < count; i++)
group-Renesas-Electronics-Corp 0:0593b97dec0b 84 {
group-Renesas-Electronics-Corp 0:0593b97dec0b 85 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 86 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 87 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 88 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 89 printf("%d networks available.\n", count);
group-Renesas-Electronics-Corp 0:0593b97dec0b 90
group-Renesas-Electronics-Corp 0:0593b97dec0b 91 delete[] ap;
group-Renesas-Electronics-Corp 0:0593b97dec0b 92 return count;
group-Renesas-Electronics-Corp 0:0593b97dec0b 93 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 94
group-Renesas-Electronics-Corp 0:0593b97dec0b 95 void http_demo(NetworkInterface *net)
group-Renesas-Electronics-Corp 0:0593b97dec0b 96 {
group-Renesas-Electronics-Corp 0:0593b97dec0b 97 TCPSocket socket;
group-Renesas-Electronics-Corp 0:0593b97dec0b 98 nsapi_error_t response;
group-Renesas-Electronics-Corp 0:0593b97dec0b 99
group-Renesas-Electronics-Corp 0:0593b97dec0b 100 printf("Sending HTTP request to www.arm.com...\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 101
group-Renesas-Electronics-Corp 0:0593b97dec0b 102 // Open a socket on the network interface, and create a TCP connection to www.arm.com
group-Renesas-Electronics-Corp 0:0593b97dec0b 103 socket.open(net);
group-Renesas-Electronics-Corp 0:0593b97dec0b 104
group-Renesas-Electronics-Corp 0:0593b97dec0b 105 response = socket.connect("www.arm.com", 80);
group-Renesas-Electronics-Corp 0:0593b97dec0b 106 if(0 != response) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 107 printf("Error connecting: %d\n", response);
group-Renesas-Electronics-Corp 0:0593b97dec0b 108 socket.close();
group-Renesas-Electronics-Corp 0:0593b97dec0b 109 return;
group-Renesas-Electronics-Corp 0:0593b97dec0b 110 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 111
group-Renesas-Electronics-Corp 0:0593b97dec0b 112 // Send a simple http request
group-Renesas-Electronics-Corp 0:0593b97dec0b 113 char sbuffer[] = "GET / HTTP/1.1\r\nHost: www.arm.com\r\n\r\n";
group-Renesas-Electronics-Corp 0:0593b97dec0b 114 nsapi_size_t size = strlen(sbuffer);
group-Renesas-Electronics-Corp 0:0593b97dec0b 115 response = 0;
group-Renesas-Electronics-Corp 0:0593b97dec0b 116 while(size)
group-Renesas-Electronics-Corp 0:0593b97dec0b 117 {
group-Renesas-Electronics-Corp 0:0593b97dec0b 118 response = socket.send(sbuffer+response, size);
group-Renesas-Electronics-Corp 0:0593b97dec0b 119 if (response < 0) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 120 printf("Error sending data: %d\n", response);
group-Renesas-Electronics-Corp 0:0593b97dec0b 121 socket.close();
group-Renesas-Electronics-Corp 0:0593b97dec0b 122 return;
group-Renesas-Electronics-Corp 0:0593b97dec0b 123 } else {
group-Renesas-Electronics-Corp 0:0593b97dec0b 124 size -= response;
group-Renesas-Electronics-Corp 0:0593b97dec0b 125 // Check if entire message was sent or not
group-Renesas-Electronics-Corp 0:0593b97dec0b 126 printf("sent %d [%.*s]\n", response, strstr(sbuffer, "\r\n")-sbuffer, sbuffer);
group-Renesas-Electronics-Corp 0:0593b97dec0b 127 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 128 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 129
group-Renesas-Electronics-Corp 0:0593b97dec0b 130 // Recieve a simple http response and print out the response line
group-Renesas-Electronics-Corp 0:0593b97dec0b 131 char rbuffer[64];
group-Renesas-Electronics-Corp 0:0593b97dec0b 132 response = socket.recv(rbuffer, sizeof rbuffer);
group-Renesas-Electronics-Corp 0:0593b97dec0b 133 if (response < 0) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 134 printf("Error receiving data: %d\n", response);
group-Renesas-Electronics-Corp 0:0593b97dec0b 135 } else {
group-Renesas-Electronics-Corp 0:0593b97dec0b 136 printf("recv %d [%.*s]\n", response, strstr(rbuffer, "\r\n")-rbuffer, rbuffer);
group-Renesas-Electronics-Corp 0:0593b97dec0b 137 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 138
group-Renesas-Electronics-Corp 0:0593b97dec0b 139 // Close the socket to return its memory and bring down the network interface
group-Renesas-Electronics-Corp 0:0593b97dec0b 140 socket.close();
group-Renesas-Electronics-Corp 0:0593b97dec0b 141 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 142
group-Renesas-Electronics-Corp 0:0593b97dec0b 143 int main()
group-Renesas-Electronics-Corp 0:0593b97dec0b 144 {
group-Renesas-Electronics-Corp 0:0593b97dec0b 145 int count = 0;
group-Renesas-Electronics-Corp 0:0593b97dec0b 146
group-Renesas-Electronics-Corp 0:0593b97dec0b 147 printf("WiFi example\n\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 148
group-Renesas-Electronics-Corp 0:0593b97dec0b 149 count = scan_demo(&wifi);
group-Renesas-Electronics-Corp 0:0593b97dec0b 150 if (count == 0) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 151 printf("No WIFI APNs found - can't continue further.\n");
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("\nConnecting to %s...\n", MBED_CONF_APP_WIFI_SSID);
group-Renesas-Electronics-Corp 0:0593b97dec0b 156 int ret = wifi.connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA_WPA2);
group-Renesas-Electronics-Corp 0:0593b97dec0b 157 if (ret != 0) {
group-Renesas-Electronics-Corp 0:0593b97dec0b 158 printf("\nConnection error\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 159 return -1;
group-Renesas-Electronics-Corp 0:0593b97dec0b 160 }
group-Renesas-Electronics-Corp 0:0593b97dec0b 161
group-Renesas-Electronics-Corp 0:0593b97dec0b 162 printf("Success\n\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 163 printf("MAC: %s\n", wifi.get_mac_address());
group-Renesas-Electronics-Corp 0:0593b97dec0b 164 printf("IP: %s\n", wifi.get_ip_address());
group-Renesas-Electronics-Corp 0:0593b97dec0b 165 printf("Netmask: %s\n", wifi.get_netmask());
group-Renesas-Electronics-Corp 0:0593b97dec0b 166 printf("Gateway: %s\n", wifi.get_gateway());
group-Renesas-Electronics-Corp 0:0593b97dec0b 167 printf("RSSI: %d\n\n", wifi.get_rssi());
group-Renesas-Electronics-Corp 0:0593b97dec0b 168
group-Renesas-Electronics-Corp 0:0593b97dec0b 169 http_demo(&wifi);
group-Renesas-Electronics-Corp 0:0593b97dec0b 170
group-Renesas-Electronics-Corp 0:0593b97dec0b 171 wifi.disconnect();
group-Renesas-Electronics-Corp 0:0593b97dec0b 172
group-Renesas-Electronics-Corp 0:0593b97dec0b 173 printf("\nDone\n");
group-Renesas-Electronics-Corp 0:0593b97dec0b 174 }