都会の電車で、 # sudo hcitool scanなんてことをすると、 00:17:83:B2:3B:xx S11HT 00:19:87:35:ED:xx 820P 00:17:5C:D4:C1:xx 912SH 00:17:5C:82:B1:xx 910SH 00:17:5C:F1:BF:xx 912SH 00:1C:EE:3A:5B:xx 812SH. 00:1C:EE:CC:3D:xx 923SH 00:17:5C:0F:84:x…