![]() ![]() % Begin scanning and decoding for specified channels. Since beacons transmit every 100 ms, set captureLength to milliseconds(100) and timeout to milliseconds(100). When you call the capture function to detect and capture a signal, you must specify the length of the capture and the signal detection timeout. ![]() Recover the SSID, BSSID, vendor of the AP, SNR, primary 20 MHz channel, current channel center frequency index, supported channel width, frequency band, and wireless standard used by the AP.Ĭheck if the waveform contains another packet that you can decode. Using the recovered MAC frame configuration, check if the non-HT packet is a beacon. Then recover the non-HT data and subsequently decode the MAC protocol data unit (MPDU). Val wifiManager = context.getSystemService(Context.Set the center frequency of the preamble detector, then initialize the detection and capture of a waveform for a set duration.Ĭheck if the preamble detector detects an OFDM packet.ĭetermine and apply frequency and timing corrections on the waveform, then attempt to recover the legacy signal (L-SIG) field bits.įrom the recovered L-SIG, extract the modulation and coding scheme (MCS) and the length of the PLCP service data unit (PSDU). The following code provides an example of how to implement these steps: ![]() This means that you might get older scan results if you call this method ![]() The returned scan results are the most recently updated results, which mayīe from a previous scan if your current scan has not completed or succeeded. The device is idle and scanning is disabled.Scan requests may be throttled because of too many scans in a short time.Make sure to check the return status of the method, since the call may fail Apps can passively listen to all scanĬompletions on device by using the broadcast without issuing a scan of their For devices running Android 10 (API level 29) and higher, thisīroadcast will be sent for any full Wi-Fi scan performed on the device by Which is called when scan requests are completed, providing their There are three steps to the scanning process: Wi-Fi access points that are visible from the device. You can use the Wi-Fi scanning capabilities provided by the ![]()
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