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; } } }