int8_t WiFiClass::scanNetworks()
{
wl_status_t tmp = _status;
if (!_init) {
init();
}
// Start scan:
if (m2m_wifi_request_scan(M2M_WIFI_CH_ALL) < 0) {
return 0;
}
// Wait for scan result or timeout:
_status = WL_IDLE_STATUS;
unsigned long start = millis();
while (!(_status & WL_SCAN_COMPLETED) && millis() - start < 5000) {
m2m_wifi_handle_events(NULL);
}
_status = tmp;
return m2m_wifi_get_num_ap_found();
}
/**
* \brief Callback to get the Wi-Fi status update.
*
* \param[in] u8MsgType type of Wi-Fi notification. Possible types are:
* - [M2M_WIFI_RESP_CON_STATE_CHANGED](@ref M2M_WIFI_RESP_CON_STATE_CHANGED)
* - [M2M_WIFI_RESP_SCAN_DONE](@ref M2M_WIFI_RESP_SCAN_DONE)
* - [M2M_WIFI_RESP_SCAN_RESULT](@ref M2M_WIFI_RESP_SCAN_RESULT)
* - [M2M_WIFI_REQ_DHCP_CONF](@ref M2M_WIFI_REQ_DHCP_CONF)
* \param[in] pvMsg A pointer to a buffer containing the notification parameters
* (if any). It should be casted to the correct data type corresponding to the
* notification type.
*/
static void wifi_cb(uint8_t u8MsgType, void *pvMsg)
{
switch (u8MsgType) {
case M2M_WIFI_RESP_SCAN_DONE:
{
tstrM2mScanDone *pstrInfo = (tstrM2mScanDone *)pvMsg;
scan_request_index = 0;
if (pstrInfo->u8NumofCh >= 1) {
m2m_wifi_req_scan_result(scan_request_index);
scan_request_index++;
} else {
m2m_wifi_request_scan(M2M_WIFI_CH_ALL);
}
break;
}
case M2M_WIFI_RESP_SCAN_RESULT:
{
tstrM2mWifiscanResult *pstrScanResult = (tstrM2mWifiscanResult *)pvMsg;
uint16_t demo_ssid_len;
uint16_t scan_ssid_len = strlen((const char *)pstrScanResult->au8SSID);
/* display founded AP. */
printf("[%d] SSID:%s\r\n", scan_request_index, pstrScanResult->au8SSID);
num_founded_ap = m2m_wifi_get_num_ap_found();
if (scan_ssid_len) {
/* check same SSID. */
demo_ssid_len = strlen((const char *)MAIN_WLAN_SSID);
if
(
(demo_ssid_len == scan_ssid_len) &&
(!memcmp(pstrScanResult->au8SSID, (uint8_t *)MAIN_WLAN_SSID, demo_ssid_len))
) {
/* A scan result matches an entry in the preferred AP List.
* Initiate a connection request.
*/
printf("Found %s \r\n", MAIN_WLAN_SSID);
m2m_wifi_connect((char *)MAIN_WLAN_SSID,
sizeof(MAIN_WLAN_SSID),
MAIN_WLAN_AUTH,
(void *)MAIN_WLAN_PSK,
M2M_WIFI_CH_ALL);
break;
}
}
if (scan_request_index < num_founded_ap) {
m2m_wifi_req_scan_result(scan_request_index);
scan_request_index++;
} else {
printf("can not find AP %s\r\n", MAIN_WLAN_SSID);
m2m_wifi_request_scan(M2M_WIFI_CH_ALL);
}
break;
}
case M2M_WIFI_RESP_CON_STATE_CHANGED:
{
tstrM2mWifiStateChanged *pstrWifiState = (tstrM2mWifiStateChanged *)pvMsg;
if (pstrWifiState->u8CurrState == M2M_WIFI_CONNECTED) {
m2m_wifi_request_dhcp_client();
} else if (pstrWifiState->u8CurrState == M2M_WIFI_DISCONNECTED) {
printf("Wi-Fi disconnected\r\n");
/* Request scan. */
m2m_wifi_request_scan(M2M_WIFI_CH_ALL);
}
break;
}
case M2M_WIFI_REQ_DHCP_CONF:
{
uint8_t *pu8IPAddress = (uint8_t *)pvMsg;
printf("Wi-Fi connected\r\n");
printf("Wi-Fi IP is %u.%u.%u.%u\r\n",
pu8IPAddress[0], pu8IPAddress[1], pu8IPAddress[2], pu8IPAddress[3]);
break;
}
default:
{
break;
}
}
}
