Diff: main.cpp

Revision:

0:3c5e2cc8251b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Feb 22 13:13:10 2019 +0800
@@ -0,0 +1,167 @@
+/* WiFi Example
+ * Copyright (c) 2016 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mbed.h"
+#include "TCPSocket.h"
+
+WiFiInterface *wifi;
+
+const char *sec2str(nsapi_security_t sec)
+{
+    switch (sec) {
+        case NSAPI_SECURITY_NONE:
+            return "None";
+        case NSAPI_SECURITY_WEP:
+            return "WEP";
+        case NSAPI_SECURITY_WPA:
+            return "WPA";
+        case NSAPI_SECURITY_WPA2:
+            return "WPA2";
+        case NSAPI_SECURITY_WPA_WPA2:
+            return "WPA/WPA2";
+        case NSAPI_SECURITY_UNKNOWN:
+        default:
+            return "Unknown";
+    }
+}
+
+int scan_demo(WiFiInterface *wifi)
+{
+    WiFiAccessPoint *ap;
+
+    printf("Scan:\n");
+
+    int count = wifi->scan(NULL,0);
+
+    if (count <= 0) {
+        printf("scan() failed with return value: %d\n", count);
+        return 0;
+    }
+
+    /* Limit number of network arbitrary to 15 */
+    count = count < 15 ? count : 15;
+
+    ap = new WiFiAccessPoint[count];
+    count = wifi->scan(ap, count);
+
+    if (count <= 0) {
+        printf("scan() failed with return value: %d\n", count);
+        return 0;
+    }
+
+    for (int i = 0; i < count; i++) {
+        printf("Network: %s secured: %s BSSID: %hhX:%hhX:%hhX:%hhx:%hhx:%hhx RSSI: %hhd Ch: %hhd\n", ap[i].get_ssid(),
+               sec2str(ap[i].get_security()), ap[i].get_bssid()[0], ap[i].get_bssid()[1], ap[i].get_bssid()[2],
+               ap[i].get_bssid()[3], ap[i].get_bssid()[4], ap[i].get_bssid()[5], ap[i].get_rssi(), ap[i].get_channel());
+    }
+    printf("%d networks available.\n", count);
+
+    delete[] ap;
+    return count;
+}
+
+void http_demo(NetworkInterface *net)
+{
+    TCPSocket socket;
+    nsapi_error_t response;
+
+    printf("Sending HTTP request to www.arm.com...\n");
+
+    // Open a socket on the network interface, and create a TCP connection to www.arm.com
+    response = socket.open(net);
+    if(0 != response) {
+        printf("socket.open() failed: %d\n", response);
+        return;
+    }
+
+    response = socket.connect("api.ipify.org", 80);
+    if(0 != response) {
+        printf("Error connecting: %d\n", response);
+        socket.close();
+        return;
+    }
+
+    // Send a simple http request
+    char sbuffer[] = "GET / HTTP/1.1\r\nHost: api.ipify.org\r\nConnection: close\r\n\r\n";
+    nsapi_size_t size = strlen(sbuffer);
+
+    // Loop until whole request send
+    while(size) {
+        response = socket.send(sbuffer+response, size);
+        if (response < 0) {
+            printf("Error sending data: %d\n", response);
+            socket.close();
+            return;
+        }
+        size -= response;
+        printf("sent %d [%.*s]\n", response, strstr(sbuffer, "\r\n")-sbuffer, sbuffer);
+    }
+
+    // Receieve a simple http response and print out the response line
+    char rbuffer[64];
+    response = socket.recv(rbuffer, sizeof rbuffer);
+    if (response < 0) {
+        printf("Error receiving data: %d\n", response);
+    } else {
+        printf("recv %d [%.*s]\n", response, strstr(rbuffer, "\r\n")-rbuffer, rbuffer);
+    }
+
+    // Close the socket to return its memory and bring down the network interface
+    socket.close();
+}
+
+int main()
+{
+    int count = 0;
+
+    printf("WiFi example\n");
+
+#ifdef MBED_MAJOR_VERSION
+    printf("Mbed OS version %d.%d.%d\n\n", MBED_MAJOR_VERSION, MBED_MINOR_VERSION, MBED_PATCH_VERSION);
+#endif
+
+    wifi = WiFiInterface::get_default_instance();
+    if (!wifi) {
+        printf("ERROR: No WiFiInterface found.\n");
+        return -1;
+    }
+
+    count = scan_demo(wifi);
+    if (count == 0) {
+        printf("No WIFI APNs found - can't continue further.\n");
+        return -1;
+    }
+
+    printf("\nConnecting to %s...\n", MBED_CONF_APP_WIFI_SSID);
+    int ret = wifi->connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA_WPA2);
+    if (ret != 0) {
+        printf("\nConnection error: %d\n", ret);
+        return -1;
+    }
+
+    printf("Success\n\n");
+    printf("MAC: %s\n", wifi->get_mac_address());
+    printf("IP: %s\n", wifi->get_ip_address());
+    printf("Netmask: %s\n", wifi->get_netmask());
+    printf("Gateway: %s\n", wifi->get_gateway());
+    printf("RSSI: %d\n\n", wifi->get_rssi());
+
+    http_demo(wifi);
+
+    wifi->disconnect();
+
+    printf("\nDone\n");
+}