mayuresh bharmoria / Mbed OS mbed-os-example-wifi

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main.cpp@0:8f8e8f3cbd1c, 2018-06-21 (annotated)

Committer:
mayur098
Date:
Thu Jun 21 17:50:21 2018 +0000
Revision:
0:8f8e8f3cbd1c
first commit;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mayur098 0:8f8e8f3cbd1c 1 /* WiFi Example
mayur098 0:8f8e8f3cbd1c 2 * Copyright (c) 2016 ARM Limited
mayur098 0:8f8e8f3cbd1c 3 *
mayur098 0:8f8e8f3cbd1c 4 * Licensed under the Apache License, Version 2.0 (the "License");
mayur098 0:8f8e8f3cbd1c 5 * you may not use this file except in compliance with the License.
mayur098 0:8f8e8f3cbd1c 6 * You may obtain a copy of the License at
mayur098 0:8f8e8f3cbd1c 7 *
mayur098 0:8f8e8f3cbd1c 8 * http://www.apache.org/licenses/LICENSE-2.0
mayur098 0:8f8e8f3cbd1c 9 *
mayur098 0:8f8e8f3cbd1c 10 * Unless required by applicable law or agreed to in writing, software
mayur098 0:8f8e8f3cbd1c 11 * distributed under the License is distributed on an "AS IS" BASIS,
mayur098 0:8f8e8f3cbd1c 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mayur098 0:8f8e8f3cbd1c 13 * See the License for the specific language governing permissions and
mayur098 0:8f8e8f3cbd1c 14 * limitations under the License.
mayur098 0:8f8e8f3cbd1c 15 */
mayur098 0:8f8e8f3cbd1c 16
mayur098 0:8f8e8f3cbd1c 17 #include "mbed.h"
mayur098 0:8f8e8f3cbd1c 18 #include "TCPSocket.h"
mayur098 0:8f8e8f3cbd1c 19
mayur098 0:8f8e8f3cbd1c 20 #define WIFI_ESP8266 1
mayur098 0:8f8e8f3cbd1c 21 #define WIFI_IDW0XX1 2
mayur098 0:8f8e8f3cbd1c 22 #define WIFI_ESP32 3
mayur098 0:8f8e8f3cbd1c 23
mayur098 0:8f8e8f3cbd1c 24 #if TARGET_UBLOX_EVK_ODIN_W2
mayur098 0:8f8e8f3cbd1c 25 #include "OdinWiFiInterface.h"
mayur098 0:8f8e8f3cbd1c 26 OdinWiFiInterface wifi;
mayur098 0:8f8e8f3cbd1c 27
mayur098 0:8f8e8f3cbd1c 28 #elif TARGET_REALTEK_RTL8195AM
mayur098 0:8f8e8f3cbd1c 29 #include "RTWInterface.h"
mayur098 0:8f8e8f3cbd1c 30 RTWInterface wifi;
mayur098 0:8f8e8f3cbd1c 31
mayur098 0:8f8e8f3cbd1c 32 #elif TARGET_GR_LYCHEE
mayur098 0:8f8e8f3cbd1c 33 #include "ESP32Interface.h"
mayur098 0:8f8e8f3cbd1c 34 ESP32Interface wifi(P5_3, P3_14, P7_1, P0_1);
mayur098 0:8f8e8f3cbd1c 35
mayur098 0:8f8e8f3cbd1c 36 #else // External WiFi modules
mayur098 0:8f8e8f3cbd1c 37
mayur098 0:8f8e8f3cbd1c 38 #if MBED_CONF_APP_WIFI_SHIELD == WIFI_ESP8266
mayur098 0:8f8e8f3cbd1c 39 #include "ESP8266Interface.h"
mayur098 0:8f8e8f3cbd1c 40 ESP8266Interface wifi(MBED_CONF_APP_WIFI_TX, MBED_CONF_APP_WIFI_RX);
mayur098 0:8f8e8f3cbd1c 41 #elif MBED_CONF_APP_WIFI_SHIELD == WIFI_IDW0XX1
mayur098 0:8f8e8f3cbd1c 42 #include "SpwfSAInterface.h"
mayur098 0:8f8e8f3cbd1c 43 SpwfSAInterface wifi(MBED_CONF_APP_WIFI_TX, MBED_CONF_APP_WIFI_RX);
mayur098 0:8f8e8f3cbd1c 44 #elif MBED_CONF_APP_WIFI_SHIELD == WIFI_ESP32
mayur098 0:8f8e8f3cbd1c 45 #include "ESP32Interface.h"
mayur098 0:8f8e8f3cbd1c 46 ESP32Interface wifi(MBED_CONF_APP_WIFI_EN, MBED_CONF_APP_WIFI_IO0, MBED_CONF_APP_WIFI_TX, MBED_CONF_APP_WIFI_RX);
mayur098 0:8f8e8f3cbd1c 47 #endif
mayur098 0:8f8e8f3cbd1c 48
mayur098 0:8f8e8f3cbd1c 49 #endif
mayur098 0:8f8e8f3cbd1c 50
mayur098 0:8f8e8f3cbd1c 51 const char *sec2str(nsapi_security_t sec)
mayur098 0:8f8e8f3cbd1c 52 {
mayur098 0:8f8e8f3cbd1c 53 switch (sec) {
mayur098 0:8f8e8f3cbd1c 54 case NSAPI_SECURITY_NONE:
mayur098 0:8f8e8f3cbd1c 55 return "None";
mayur098 0:8f8e8f3cbd1c 56 case NSAPI_SECURITY_WEP:
mayur098 0:8f8e8f3cbd1c 57 return "WEP";
mayur098 0:8f8e8f3cbd1c 58 case NSAPI_SECURITY_WPA:
mayur098 0:8f8e8f3cbd1c 59 return "WPA";
mayur098 0:8f8e8f3cbd1c 60 case NSAPI_SECURITY_WPA2:
mayur098 0:8f8e8f3cbd1c 61 return "WPA2";
mayur098 0:8f8e8f3cbd1c 62 case NSAPI_SECURITY_WPA_WPA2:
mayur098 0:8f8e8f3cbd1c 63 return "WPA/WPA2";
mayur098 0:8f8e8f3cbd1c 64 case NSAPI_SECURITY_UNKNOWN:
mayur098 0:8f8e8f3cbd1c 65 default:
mayur098 0:8f8e8f3cbd1c 66 return "Unknown";
mayur098 0:8f8e8f3cbd1c 67 }
mayur098 0:8f8e8f3cbd1c 68 }
mayur098 0:8f8e8f3cbd1c 69
mayur098 0:8f8e8f3cbd1c 70 int scan_demo(WiFiInterface *wifi)
mayur098 0:8f8e8f3cbd1c 71 {
mayur098 0:8f8e8f3cbd1c 72 WiFiAccessPoint *ap;
mayur098 0:8f8e8f3cbd1c 73
mayur098 0:8f8e8f3cbd1c 74 printf("Scan:\n");
mayur098 0:8f8e8f3cbd1c 75
mayur098 0:8f8e8f3cbd1c 76 int count = wifi->scan(NULL,0);
mayur098 0:8f8e8f3cbd1c 77
mayur098 0:8f8e8f3cbd1c 78 /* Limit number of network arbitrary to 15 */
mayur098 0:8f8e8f3cbd1c 79 count = count < 15 ? count : 15;
mayur098 0:8f8e8f3cbd1c 80
mayur098 0:8f8e8f3cbd1c 81 ap = new WiFiAccessPoint[count];
mayur098 0:8f8e8f3cbd1c 82 count = wifi->scan(ap, count);
mayur098 0:8f8e8f3cbd1c 83 for (int i = 0; i < count; i++)
mayur098 0:8f8e8f3cbd1c 84 {
mayur098 0:8f8e8f3cbd1c 85 printf("Network: %s secured: %s BSSID: %hhX:%hhX:%hhX:%hhx:%hhx:%hhx RSSI: %hhd Ch: %hhd\n", ap[i].get_ssid(),
mayur098 0:8f8e8f3cbd1c 86 sec2str(ap[i].get_security()), ap[i].get_bssid()[0], ap[i].get_bssid()[1], ap[i].get_bssid()[2],
mayur098 0:8f8e8f3cbd1c 87 ap[i].get_bssid()[3], ap[i].get_bssid()[4], ap[i].get_bssid()[5], ap[i].get_rssi(), ap[i].get_channel());
mayur098 0:8f8e8f3cbd1c 88 }
mayur098 0:8f8e8f3cbd1c 89 printf("%d networks available.\n", count);
mayur098 0:8f8e8f3cbd1c 90
mayur098 0:8f8e8f3cbd1c 91 delete[] ap;
mayur098 0:8f8e8f3cbd1c 92 return count;
mayur098 0:8f8e8f3cbd1c 93 }
mayur098 0:8f8e8f3cbd1c 94
mayur098 0:8f8e8f3cbd1c 95 void http_demo(NetworkInterface *net)
mayur098 0:8f8e8f3cbd1c 96 {
mayur098 0:8f8e8f3cbd1c 97 TCPSocket socket;
mayur098 0:8f8e8f3cbd1c 98 nsapi_error_t response;
mayur098 0:8f8e8f3cbd1c 99
mayur098 0:8f8e8f3cbd1c 100 printf("Sending HTTP request to www.arm.com...\n");
mayur098 0:8f8e8f3cbd1c 101
mayur098 0:8f8e8f3cbd1c 102 // Open a socket on the network interface, and create a TCP connection to www.arm.com
mayur098 0:8f8e8f3cbd1c 103 socket.open(net);
mayur098 0:8f8e8f3cbd1c 104
mayur098 0:8f8e8f3cbd1c 105 response = socket.connect("www.arm.com", 80);
mayur098 0:8f8e8f3cbd1c 106 if(0 != response) {
mayur098 0:8f8e8f3cbd1c 107 printf("Error connecting: %d\n", response);
mayur098 0:8f8e8f3cbd1c 108 socket.close();
mayur098 0:8f8e8f3cbd1c 109 return;
mayur098 0:8f8e8f3cbd1c 110 }
mayur098 0:8f8e8f3cbd1c 111
mayur098 0:8f8e8f3cbd1c 112 // Send a simple http request
mayur098 0:8f8e8f3cbd1c 113 char sbuffer[] = "GET / HTTP/1.1\r\nHost: www.arm.com\r\n\r\n";
mayur098 0:8f8e8f3cbd1c 114 nsapi_size_t size = strlen(sbuffer);
mayur098 0:8f8e8f3cbd1c 115 response = 0;
mayur098 0:8f8e8f3cbd1c 116 while(size)
mayur098 0:8f8e8f3cbd1c 117 {
mayur098 0:8f8e8f3cbd1c 118 response = socket.send(sbuffer+response, size);
mayur098 0:8f8e8f3cbd1c 119 if (response < 0) {
mayur098 0:8f8e8f3cbd1c 120 printf("Error sending data: %d\n", response);
mayur098 0:8f8e8f3cbd1c 121 socket.close();
mayur098 0:8f8e8f3cbd1c 122 return;
mayur098 0:8f8e8f3cbd1c 123 } else {
mayur098 0:8f8e8f3cbd1c 124 size -= response;
mayur098 0:8f8e8f3cbd1c 125 // Check if entire message was sent or not
mayur098 0:8f8e8f3cbd1c 126 printf("sent %d [%.*s]\n", response, strstr(sbuffer, "\r\n")-sbuffer, sbuffer);
mayur098 0:8f8e8f3cbd1c 127 }
mayur098 0:8f8e8f3cbd1c 128 }
mayur098 0:8f8e8f3cbd1c 129
mayur098 0:8f8e8f3cbd1c 130 // Recieve a simple http response and print out the response line
mayur098 0:8f8e8f3cbd1c 131 char rbuffer[64];
mayur098 0:8f8e8f3cbd1c 132 response = socket.recv(rbuffer, sizeof rbuffer);
mayur098 0:8f8e8f3cbd1c 133 if (response < 0) {
mayur098 0:8f8e8f3cbd1c 134 printf("Error receiving data: %d\n", response);
mayur098 0:8f8e8f3cbd1c 135 } else {
mayur098 0:8f8e8f3cbd1c 136 printf("recv %d [%.*s]\n", response, strstr(rbuffer, "\r\n")-rbuffer, rbuffer);
mayur098 0:8f8e8f3cbd1c 137 }
mayur098 0:8f8e8f3cbd1c 138
mayur098 0:8f8e8f3cbd1c 139 // Close the socket to return its memory and bring down the network interface
mayur098 0:8f8e8f3cbd1c 140 socket.close();
mayur098 0:8f8e8f3cbd1c 141 }
mayur098 0:8f8e8f3cbd1c 142
mayur098 0:8f8e8f3cbd1c 143 int main()
mayur098 0:8f8e8f3cbd1c 144 {
mayur098 0:8f8e8f3cbd1c 145 int count = 0;
mayur098 0:8f8e8f3cbd1c 146
mayur098 0:8f8e8f3cbd1c 147 printf("WiFi example\n\n");
mayur098 0:8f8e8f3cbd1c 148
mayur098 0:8f8e8f3cbd1c 149 count = scan_demo(&wifi);
mayur098 0:8f8e8f3cbd1c 150 if (count == 0) {
mayur098 0:8f8e8f3cbd1c 151 printf("No WIFI APNs found - can't continue further.\n");
mayur098 0:8f8e8f3cbd1c 152 return -1;
mayur098 0:8f8e8f3cbd1c 153 }
mayur098 0:8f8e8f3cbd1c 154
mayur098 0:8f8e8f3cbd1c 155 printf("\nConnecting to %s...\n", MBED_CONF_APP_WIFI_SSID);
mayur098 0:8f8e8f3cbd1c 156 int ret = wifi.connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA_WPA2);
mayur098 0:8f8e8f3cbd1c 157 if (ret != 0) {
mayur098 0:8f8e8f3cbd1c 158 printf("\nConnection error\n");
mayur098 0:8f8e8f3cbd1c 159 return -1;
mayur098 0:8f8e8f3cbd1c 160 }
mayur098 0:8f8e8f3cbd1c 161
mayur098 0:8f8e8f3cbd1c 162 printf("Success\n\n");
mayur098 0:8f8e8f3cbd1c 163 printf("MAC: %s\n", wifi.get_mac_address());
mayur098 0:8f8e8f3cbd1c 164 printf("IP: %s\n", wifi.get_ip_address());
mayur098 0:8f8e8f3cbd1c 165 printf("Netmask: %s\n", wifi.get_netmask());
mayur098 0:8f8e8f3cbd1c 166 printf("Gateway: %s\n", wifi.get_gateway());
mayur098 0:8f8e8f3cbd1c 167 printf("RSSI: %d\n\n", wifi.get_rssi());
mayur098 0:8f8e8f3cbd1c 168
mayur098 0:8f8e8f3cbd1c 169 http_demo(&wifi);
mayur098 0:8f8e8f3cbd1c 170
mayur098 0:8f8e8f3cbd1c 171 wifi.disconnect();
mayur098 0:8f8e8f3cbd1c 172
mayur098 0:8f8e8f3cbd1c 173 printf("\nDone\n");
mayur098 0:8f8e8f3cbd1c 174 }