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WiFi AP example for Odin-W2
mbed-os-example-odinw2-wifi-ap
Wi-Fi access point example for Mbed OS
Getting started with the Wi-Fi API
This is an example of a Wi-Fi access point application using the odinWiFiInterface and network socket APIs that [Mbed OS](https://github.com/ARMmbed/mbed-os) provides.
The program brings up the Wi-Fi access point and the underlying network interface and brings up a TCP echo server on access point.
Supported hardware
- [u-blox ODIN-W2](https://os.mbed.com/platforms/ublox-EVK-ODIN-W2/)
Getting started
1. Import the example.
mbed import mbed-os-example-odinw2-wifi-ap cd mbed-os-example-odinw2-wifi-ap
2. Configure the Wi-Fi to enable and use access point.
Edit mbed_app.json to include the correct Wi-Fi configurations, SSID and password:
"macros": ["DEVICE_WIFI_AP=1"], "config": { "wifi-ssid": { "help": "AP SSID", "value": "\"odin-w2\"" }, "ap-ip": { "help": "AP IP", "value": "\"ip value\"" }, "ap-netmask": { "help": "Netmask", "value": "\"netmask value\"" }, "ap-gateway": { "help": "Network gateway", "value": "\"gateway value\"" }, "ap-channel": { "help": "AP channel", "value": "\"some channel\"" }, "wifi-password": { "help": "WiFi Password", "value": "\"some pass\"" }
3. Compile and generate binary.
For example, for 'GCC':
mbed compile -t GCC_ARM -m UBLOX_EVK_ODIN_W2 ```
4. Open a serial console session with the target platform using the following parameters:
- Baud rate: 9600
- Data bits: 8
- Stop bits: 1
- Parity: None
5. Copy or drag the application 'mbed-os-example-odinw2-wifi-ap' in the folder 'mbed-os-example-odinw2-wifi-ap/BUILD/<TARGET NAME>/<PLATFORM NAME>' onto the target board.
6. The serial console should display a similar output to below, indicating a successful Wi-Fi connection:
Starting AP
AP started successfully
TCP: connected with 10.0.0.1 server
7. After the server message is displayed, connect a TCP client, upton sending a message to server, message will be echoed to client.
Limitations
1. DHCP mode is not supported.
Diff: main.cpp
- Revision:
- 0:ebe81a0cdefc
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Mon Sep 24 09:19:50 2018 +0000 @@ -0,0 +1,145 @@ +/* WiFi AP Example + * Copyright (c) 2018 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 "OdinWiFiInterface.h" +#include "TCPSocket.h" +#include <string> + +#ifdef DEVICE_WIFI_AP +static const char *wifi_ssid = MBED_CONF_APP_WIFI_SSID; +static const char *wifi_password = MBED_CONF_APP_WIFI_PASSWORD; +static const char *ap_ip = MBED_CONF_APP_AP_IP; +static const char *ap_netmask = MBED_CONF_APP_AP_NETMASK; +static const char *ap_gateway = MBED_CONF_APP_AP_GATEWAY; +#endif + +#define ECHO_SERVER_PORT 5050 + +OdinWiFiInterface *_wifi; + + +static void start_ap(nsapi_security_t security = NSAPI_SECURITY_WPA_WPA2) +{ + nsapi_error_t error_code; + + printf("\nStarting AP\n"); + + // AP Configure and start + error_code = _wifi->set_ap_network(ap_ip, ap_netmask, ap_gateway); + MBED_ASSERT(error_code == NSAPI_ERROR_OK); + + //DHCP not available + error_code = _wifi->set_ap_dhcp(false); + MBED_ASSERT(error_code == NSAPI_ERROR_OK); + + //Set beacon interval to default value + _wifi->set_ap_beacon_interval(100); + + //Set ap ssid, password and channel + error_code = _wifi->ap_start(wifi_ssid, wifi_password, security, cbWLAN_CHANNEL_01); + MBED_ASSERT(error_code == NSAPI_ERROR_OK); + + printf("\nAP started successfully\n"); +} + + +static void stop_ap() +{ + nsapi_error_t error_code; + + error_code = _wifi->ap_stop(); + MBED_ASSERT(error_code == NSAPI_ERROR_OK); + + printf("\nAP stopped\n"); + +} + +int main() +{ + nsapi_size_or_error_t errcode; + nsapi_error_t *err; + TCPSocket sock, *sock_data; + int n = 0; + char recv_buf[1024]; + + /*Start AP*/ + + _wifi = new OdinWiFiInterface(true); + + start_ap(); + + /*Socket initialization*/ + + errcode = sock.open(_wifi); + if (errcode != NSAPI_ERROR_OK) { + printf("TCPSocket.open() fails, code: %d\n", errcode); + return -1; + } + + errcode = sock.bind("10.0.0.1", ECHO_SERVER_PORT); + if (errcode < 0) { + printf("TCPSocket.connect() fails, code: %d\n", errcode); + return -1; + } + else { + printf("TCP: connected with %s server\n", "10.0.0.1"); + } + + /*Echo server*/ + if (sock.listen() == 0) + { + sock_data = sock.accept(err = NULL); + + if (sock_data != NULL) + { + while (true) + { + n = sock_data->recv((void*) recv_buf, sizeof(recv_buf)); + if (n > 0) + { + printf("\n Received from client %d bytes: %s \n", n, recv_buf); + + errcode = sock_data->send((void*) recv_buf, n); + if (errcode < 0) + { + printf("\n TCPSocket.send() fails, code: %d\n", errcode); + return -1; + } + else + { + printf("\n TCP: Sent %d Bytes to client\n", n); + } + } + else + { + printf("\n TCPSocket.recv() failed"); + return -1; + } + + } + + } + + } + + sock_data->close(); + sock.close(); + + stop_ap(); + + return 0; +}