@dimi
I have tested your code several time.
I'm afraid, I found problem.
Soft AP function was operated first time, But When I reset module, It's not possible to access any more. It's always reset when i access M5stack soft AP mode.
I found "Guru Meditation Error" through debugging port.
Please let me know how to fix.
I'm now using WINDOW 10
//====================================================
M5Stack initializing...OK
Guru Meditation Error: Core 0 panic'ed (InstrFetchProhibited). Exception was unhandled.
Core 0 register dump:
PC : 0x00000000 PS : 0x00060e30 A0 : 0x800f5e71 A1 : 0x3ffb3d70
A2 : 0x3ffc8a34 A3 : 0x3ffc8c88 A4 : 0x3ffafe8c A5 : 0x3ffc8c68
A6 : 0x0204a8c0 A7 : 0x6504a8c0 A8 : 0x800f5d14 A9 : 0x3ffb3d30
A10 : 0x3ffc8a44 A11 : 0x3ffc8c88 A12 : 0x3ffb3d7c A13 : 0x00000044
A14 : 0x00000001 A15 : 0x00000006 SAR : 0x00000010 EXCCAUSE: 0x00000014
EXCVADDR: 0x00000000 LBEG : 0x4000c349 LEND : 0x4000c36b LCOUNT : 0x00000000

Backtrace: 0x00000000:0x3ffb3d70 0x400f5e6e:0x3ffb3db0 0x40101d21:0x3ffb3dd0 0x401056ad:0x3ffb3e10 0x4010a8e2:0x3ffb3e30 0x400f9257:0x3ffb3e50 0x4008f1f5:0x3ffb3e80

Rebooting...
ets Jun 8 2016 00:22:57