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add note that NTR wifi is used in standby mode.
Using Wireshark tool with a WiFi card in monitor mode allow you to see the data used to scan for other 3DS in the range. The below is a broadcast probe request from an 3DS while in standby mode, with SSID "Nintendo_3DS_continuous_scan_000". When in "active" mode, 3DS sends probe requests with arbitrary SSID strings, like "ic[kSvm9s@*cYD>/~IEVj\(fGG;qDo8j".
Using Wireshark tool with a WiFi card in monitor mode allow you to see the data used to scan for other 3DS in the range. The below is a broadcast probe request from an 3DS while in standby mode, with SSID "Nintendo_3DS_continuous_scan_000". When in "active" mode, 3DS sends probe requests with arbitrary SSID strings, like "ic[kSvm9s@*cYD>/~IEVj\(fGG;qDo8j".
When in standby mode, ds-mode NTR wifi is used,(this includes SpotPass and StreetPass) but in "active" mode the regular TWL wifimmc bus is used.
0000 00 00 1a 00 2f 48 00 00 19 7d 19 de 2a 00 00 00 ..../H...}..*...
0000 00 00 1a 00 2f 48 00 00 19 7d 19 de 2a 00 00 00 ..../H...}..*...