Peng Jing Xuan / Mbed OS mbed_wifi_MQTT_PM25

mbed_wifi_MQTT_PM25

Dependencies:   mbed-os-example-wifi-DISCO_IOTBOARD_MQTT MQTT

main.cpp@37:3a31525e2971, 2017-09-29 (annotated)

Committer:
mbed_official
Date:
Fri Sep 29 10:15:04 2017 +0100
Revision:
37:3a31525e2971
Parent:
35:052c1ba06ce7
Child:
44:63be19b7a3db
Continue exmaple only if WIFI APNs are found



Stop the example if there are 0 APNs found in the scan.



.

Commit copied from https://github.com/ARMmbed/mbed-os-example-wifi

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:857719181846 1 /* WiFi Example
mbed_official 0:857719181846 2 * Copyright (c) 2016 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 32:bca3f5f442b3 20 #define WIFI_ESP8266 1
mbed_official 32:bca3f5f442b3 21 #define WIFI_IDW01M1 2
mbed_official 32:bca3f5f442b3 22
mbed_official 0:857719181846 23 #if TARGET_UBLOX_EVK_ODIN_W2
mbed_official 1:aea78e21a7da 24 #include "OdinWiFiInterface.h"
mbed_official 1:aea78e21a7da 25 OdinWiFiInterface wifi;
mbed_official 10:5b5beb106156 26
mbed_official 21:b2f2f6a840b4 27 #elif TARGET_REALTEK_RTL8195AM
mbed_official 21:b2f2f6a840b4 28 #include "RTWInterface.h"
mbed_official 21:b2f2f6a840b4 29 RTWInterface wifi;
mbed_official 21:b2f2f6a840b4 30
mbed_official 33:12f0df4d51d7 31 #else // External WiFi modules
mbed_official 21:b2f2f6a840b4 32
mbed_official 32:bca3f5f442b3 33 #if MBED_CONF_APP_WIFI_SHIELD == WIFI_ESP8266
mbed_official 1:aea78e21a7da 34 #include "ESP8266Interface.h"
mbed_official 10:5b5beb106156 35 ESP8266Interface wifi(MBED_CONF_APP_WIFI_TX, MBED_CONF_APP_WIFI_RX);
mbed_official 32:bca3f5f442b3 36 #elif MBED_CONF_APP_WIFI_SHIELD == WIFI_IDW01M1
mbed_official 32:bca3f5f442b3 37 #include "SpwfSAInterface.h"
mbed_official 32:bca3f5f442b3 38 SpwfSAInterface wifi(MBED_CONF_APP_WIFI_TX, MBED_CONF_APP_WIFI_RX);
mbed_official 32:bca3f5f442b3 39 #endif // MBED_CONF_APP_WIFI_SHIELD == WIFI_IDW01M1
mbed_official 10:5b5beb106156 40
mbed_official 33:12f0df4d51d7 41 #endif
mbed_official 0:857719181846 42
mbed_official 0:857719181846 43 const char *sec2str(nsapi_security_t sec)
mbed_official 0:857719181846 44 {
mbed_official 0:857719181846 45 switch (sec) {
mbed_official 0:857719181846 46 case NSAPI_SECURITY_NONE:
mbed_official 0:857719181846 47 return "None";
mbed_official 0:857719181846 48 case NSAPI_SECURITY_WEP:
mbed_official 0:857719181846 49 return "WEP";
mbed_official 0:857719181846 50 case NSAPI_SECURITY_WPA:
mbed_official 0:857719181846 51 return "WPA";
mbed_official 0:857719181846 52 case NSAPI_SECURITY_WPA2:
mbed_official 0:857719181846 53 return "WPA2";
mbed_official 0:857719181846 54 case NSAPI_SECURITY_WPA_WPA2:
mbed_official 0:857719181846 55 return "WPA/WPA2";
mbed_official 0:857719181846 56 case NSAPI_SECURITY_UNKNOWN:
mbed_official 0:857719181846 57 default:
mbed_official 0:857719181846 58 return "Unknown";
mbed_official 0:857719181846 59 }
mbed_official 0:857719181846 60 }
mbed_official 0:857719181846 61
mbed_official 37:3a31525e2971 62 int scan_demo(WiFiInterface *wifi)
mbed_official 0:857719181846 63 {
mbed_official 0:857719181846 64 WiFiAccessPoint *ap;
mbed_official 0:857719181846 65
mbed_official 35:052c1ba06ce7 66 printf("Scan:\n");
mbed_official 0:857719181846 67
mbed_official 0:857719181846 68 int count = wifi->scan(NULL,0);
mbed_official 0:857719181846 69
mbed_official 0:857719181846 70 /* Limit number of network arbitrary to 15 */
mbed_official 0:857719181846 71 count = count < 15 ? count : 15;
mbed_official 0:857719181846 72
mbed_official 0:857719181846 73 ap = new WiFiAccessPoint[count];
mbed_official 0:857719181846 74 count = wifi->scan(ap, count);
mbed_official 0:857719181846 75 for (int i = 0; i < count; i++)
mbed_official 0:857719181846 76 {
mbed_official 35:052c1ba06ce7 77 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 78 sec2str(ap[i].get_security()), ap[i].get_bssid()[0], ap[i].get_bssid()[1], ap[i].get_bssid()[2],
mbed_official 0:857719181846 79 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 80 }
mbed_official 35:052c1ba06ce7 81 printf("%d networks available.\n", count);
mbed_official 0:857719181846 82
mbed_official 0:857719181846 83 delete[] ap;
mbed_official 37:3a31525e2971 84 return count;
mbed_official 0:857719181846 85 }
mbed_official 0:857719181846 86
mbed_official 0:857719181846 87 void http_demo(NetworkInterface *net)
mbed_official 0:857719181846 88 {
mbed_official 0:857719181846 89 TCPSocket socket;
mbed_official 24:323569a565ec 90 nsapi_error_t response;
mbed_official 0:857719181846 91
mbed_official 35:052c1ba06ce7 92 printf("Sending HTTP request to www.arm.com...\n");
mbed_official 0:857719181846 93
mbed_official 0:857719181846 94 // Open a socket on the network interface, and create a TCP connection to www.arm.com
mbed_official 0:857719181846 95 socket.open(net);
mbed_official 24:323569a565ec 96 response = socket.connect("www.arm.com", 80);
mbed_official 24:323569a565ec 97 if(0 != response) {
mbed_official 35:052c1ba06ce7 98 printf("Error connecting: %d\n", response);
mbed_official 24:323569a565ec 99 socket.close();
mbed_official 24:323569a565ec 100 return;
mbed_official 24:323569a565ec 101 }
mbed_official 0:857719181846 102
mbed_official 0:857719181846 103 // Send a simple http request
mbed_official 0:857719181846 104 char sbuffer[] = "GET / HTTP/1.1\r\nHost: www.arm.com\r\n\r\n";
mbed_official 33:12f0df4d51d7 105 nsapi_size_t size = strlen(sbuffer);
mbed_official 24:323569a565ec 106 response = 0;
mbed_official 24:323569a565ec 107 while(size)
mbed_official 24:323569a565ec 108 {
mbed_official 24:323569a565ec 109 response = socket.send(sbuffer+response, size);
mbed_official 24:323569a565ec 110 if (response < 0) {
mbed_official 35:052c1ba06ce7 111 printf("Error sending data: %d\n", response);
mbed_official 24:323569a565ec 112 socket.close();
mbed_official 24:323569a565ec 113 return;
mbed_official 24:323569a565ec 114 } else {
mbed_official 24:323569a565ec 115 size -= response;
mbed_official 24:323569a565ec 116 // Check if entire message was sent or not
mbed_official 35:052c1ba06ce7 117 printf("sent %d [%.*s]\n", response, strstr(sbuffer, "\r\n")-sbuffer, sbuffer);
mbed_official 24:323569a565ec 118 }
mbed_official 24:323569a565ec 119 }
mbed_official 0:857719181846 120
mbed_official 0:857719181846 121 // Recieve a simple http response and print out the response line
mbed_official 0:857719181846 122 char rbuffer[64];
mbed_official 24:323569a565ec 123 response = socket.recv(rbuffer, sizeof rbuffer);
mbed_official 24:323569a565ec 124 if (response < 0) {
mbed_official 35:052c1ba06ce7 125 printf("Error receiving data: %d\n", response);
mbed_official 24:323569a565ec 126 } else {
mbed_official 35:052c1ba06ce7 127 printf("recv %d [%.*s]\n", response, strstr(rbuffer, "\r\n")-rbuffer, rbuffer);
mbed_official 24:323569a565ec 128 }
mbed_official 0:857719181846 129
mbed_official 0:857719181846 130 // Close the socket to return its memory and bring down the network interface
mbed_official 0:857719181846 131 socket.close();
mbed_official 0:857719181846 132 }
mbed_official 0:857719181846 133
mbed_official 0:857719181846 134 int main()
mbed_official 0:857719181846 135 {
mbed_official 37:3a31525e2971 136 int count = 0;
mbed_official 37:3a31525e2971 137
mbed_official 35:052c1ba06ce7 138 printf("WiFi example\n\n");
mbed_official 0:857719181846 139
mbed_official 37:3a31525e2971 140 count = scan_demo(&wifi);
mbed_official 37:3a31525e2971 141 if (count == 0) {
mbed_official 37:3a31525e2971 142 printf("No WIFI APNs found - can't continue further.\n");
mbed_official 37:3a31525e2971 143 return -1;
mbed_official 37:3a31525e2971 144 }
mbed_official 0:857719181846 145
mbed_official 37:3a31525e2971 146 printf("\nConnecting to %s...\n", MBED_CONF_APP_WIFI_SSID);
mbed_official 0:857719181846 147 int ret = wifi.connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA_WPA2);
mbed_official 0:857719181846 148 if (ret != 0) {
mbed_official 35:052c1ba06ce7 149 printf("\nConnection error\n");
mbed_official 0:857719181846 150 return -1;
mbed_official 0:857719181846 151 }
mbed_official 0:857719181846 152
mbed_official 35:052c1ba06ce7 153 printf("Success\n\n");
mbed_official 35:052c1ba06ce7 154 printf("MAC: %s\n", wifi.get_mac_address());
mbed_official 35:052c1ba06ce7 155 printf("IP: %s\n", wifi.get_ip_address());
mbed_official 35:052c1ba06ce7 156 printf("Netmask: %s\n", wifi.get_netmask());
mbed_official 35:052c1ba06ce7 157 printf("Gateway: %s\n", wifi.get_gateway());
mbed_official 35:052c1ba06ce7 158 printf("RSSI: %d\n\n", wifi.get_rssi());
mbed_official 0:857719181846 159
mbed_official 0:857719181846 160 http_demo(&wifi);
mbed_official 0:857719181846 161
mbed_official 0:857719181846 162 wifi.disconnect();
mbed_official 0:857719181846 163
mbed_official 35:052c1ba06ce7 164 printf("\nDone\n");
mbed_official 0:857719181846 165 }