5.10.1 Execution

main.c - Initialize the chip and retrieve information.

Code summary:

Configure the network parameters in main.h.

/** Wi-Fi Settings */
#define MAIN_WLAN_SSID                    "DEMO_AP" /**< Destination SSID */
#define MAIN_WLAN_AUTH                    M2M_WIFI_SEC_WPA_PSK /**< Security manner */
#define MAIN_WLAN_PSK                     "12345678" /**< Password for Destination SSID */

Initialize the socket module and register the socket callback function.

/* Initialize socket address structure. */
addr.sin_family = AF_INET;
addr.sin_port = _htons(MAIN_WIFI_M2M_SERVER_PORT);
addr.sin_addr.s_addr = _htonl(MAIN_WIFI_M2M_SERVER_IP);
/* Initialize socket module */
socketInit();
registerSocketCallback(socket_cb, NULL);

Get the MAC address and set the device name with the MAC address.

m2m_wifi_get_mac_address(gau8MacAddr);

set_dev_name_to_mac((uint8_t *)gacDeviceName, gau8MacAddr);
set_dev_name_to_mac((uint8_t *)gstrM2MAPConfig.au8SSID, gau8MacAddr);
m2m_wifi_set_device_name((uint8_t *)gacDeviceName, ...);

Start the Provision mode.

m2m_wifi_start_provision_mode((tstrM2MAPConfig *)&gstrM2MAPConfig,
        (char *)gacHttpProvDomainName, 1);

When the mobile device sends configuration information, the wifi_cb() function is called with the M2M_WIFI_RESP_PROVISION_INFO message and the user can connect to the AP with the given information.

static void wifi_cb(uint8_t u8MsgType, void *pvMsg)
{
	case M2M_WIFI_RESP_PROVISION_INFO: 
        tstrM2MProvisionInfo *pstrProvInfo = (tstrM2MProvisionInfo *)pvMsg;        
        if (pstrProvInfo->u8Status == M2M_SUCCESS) {
		m2m_wifi_connect((char *)pstrProvInfo->au8SSID,
                strlen((char *)pstrProvInfo->au8SSID),        
                pstrProvInfo->u8SecType,
                pstrProvInfo->au8Password, M2M_WIFI_CH_ALL);
	}

After the device is connected to the AP, the gethostbyname() function is called.

static void wifi_cb(uint8_t u8MsgType, void *pvMsg)
{
	...
    case M2M_WIFI_REQ_DHCP_CONF:
    {
	...
	gbConnectedWifi = true;
	gethostbyname((uint8_t *)MAIN_WEATHER_SERVER_NAME);
    }
    ...
}

Create a TCP client socket and connect to the server in the main loop.

if (gbConnectedWifi && !gbTcpConnection) {
    if (gbHostIpByName) {
	if (tcp_client_socket < 0) {
		if ((tcp_client_socket = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
		continue;
	        }
        }
    if (connect(tcp_client_socket, ...) != SOCK_ERR_NO_ERROR) {
        continue;
    }
    gbTcpConnection = true;
    }
}

The socket callback function receives the SOCKET_MSG_CONNECT message and then it requests weather information from the server with a city name.

static void socket_cb(SOCKET sock, uint8_t u8Msg, void *pvMsg)
{
    case SOCKET_MSG_CONNECT:
	sprintf(gau8ReceivedBuffer, ..., MAIN_CITY_NAME, ...);
    ...
    send(tcp_client_socket, gau8ReceivedBuffer, ...);
    recv(tcp_client_socket, (struct sockaddr *)&addr_in, sizeof(struct sockaddr_in));
    break;
}

The socket callback function receives a SOCKET_MSG_RECV message with weather information. The user can also get the current temperature via an IO1 sensor board as shown in the following.

static void socket_cb(SOCKET sock, uint8_t u8Msg, void *pvMsg)
{
    case SOCKET_MSG_RECV:
    ...
    /** From the received Josan format buffer City Name, Temperature, Weather Number will be parsed */
    /* Get city name. */
    pcIndxPtr = strstr((char *)pstrRecv->pu8Buffer, "name=");
    printf("City: ");
    ...
    /* Get temperature. */
    pcIndxPtr = strstr(pcEndPtr + 1, "temperature value");
    printf("Temperature: ");
   ...
    /* Get weather condition. */
    pcIndxPtr = strstr(pcEndPtr + 1, "weather number");
    if (NULL != pcIndxPtr) {
        printf("Weather Condition: ");
    
}

Build the program and download it into the board.
Start the application.
Connect the mobile device to the ATWINC15x0/ATWINC3400 AP [WINC1500_XX:XX].
Browse the web page (www.microchip.com) to setup the AP, populate the page and press Connect.
The ATWINC15x0/ATWINC3400 will be connected to the selected AP.
The weather information will be printed.

Note: If the server connection is unstable, this example may not operate normally.

AN5305

5.10.1 Execution