@robert-hh But it's funny that mainly the Fritzbox has the problem. Something must be different.

Hi, again. I have update 10 wipy and 2 gpy with the latest fw (1.20.2.rc6). With this fw I'm getting Guru Meditation Error. Some times the pycom became freeze on the Guru Meditation Error. Guru Meditation Error: Core 1 panic'ed (InstrFetchProhibited). Exception was unhandled. Core 1 register dump: PC : 0x3ffb624c PS : 0x00060630 A0 : 0x80095188 A1 : 0x3ffdcc00 A2 : 0x3ffb61dc A3 : 0x00060620 A4 : 0x3ffdabe8 A5 : 0x00000001 A6 : 0x000000fe A7 : 0x00000001 A8 : 0x800947bc A9 : 0x3ffdcbf0 A10 : 0x00000000 A11 : 0x3ffc9509 A12 : 0x00060620 A13 : 0x00000001 A14 : 0x000000fe A15 : 0x3ffb61dc SAR : 0x00000000 EXCCAUSE: 0x00000014 EXCVADDR: 0x3ffb624c LBEG : 0x40091ad4 LEND : 0x40091b02 LCOUNT : 0xffffffff ELF file SHA256: ets Jun 8 2016 00:22:57 But most of the times the guru meditation error do a core dump, and the cpu reset. Guru Meditation Error: Core 1 panic'ed (StoreProhibited). Exception was unhandled. Core 1 register dump: PC : 0x40096c29 PS : 0x00060533 A0 : 0x80095107 A1 : 0x3ffdcc00 A2 : 0x3ffb61ec A3 : 0x00060520 A4 : 0x3ffdabe8 A5 : 0x00000001 A6 : 0x000000fe A7 : 0x00000001 A8 : 0x3ffb6210 A9 : 0x3ffb61fc A10 : 0x00000001 A11 : 0x0000abab A12 : 0x3ffdabe8 A13 : 0x00000001 A14 : 0x000000fe A15 : 0x3ffb61e4 SAR : 0x00000000 EXCCAUSE: 0x0000001d EXCVADDR: 0x00000009 LBEG : 0x40091ad4 LEND : 0x40091b02 LCOUNT : 0xffffffff ELF file SHA256: 0000000000000000000000000000000000000000000000000000000000000000 Backtrace: 0x40096c29:0x3ffdcc00 0x40095104:0x3ffdcc20 0x400f31b8:0x3ffdcc40 0x400e0715:0x3ffdccd0 ================= CORE DUMP START ================= This guru meditations are random. Can happen on the first 5 min or after 5 days.

Could you simply feed the WDT while you write until you flush?

@alexpul correct

Sorry @jmarcelino for missing that bit in the documentation... it makes sense now. Thank you @MarcoBenini for the information about the defaults. That seems like a good solution.

@aptusmarvin this was 7 months ago - did you tried it now with current firmware? to check firmware on you board run os.uname()

I will stop the WDT just before deep sleep, and waking from sleep requires a reset, so it's not looped for me. main.py can take anywhere from a few seconds to several minutes to execute, so I don't know the maximum duration ahead of time. It would seem I would need to feed it all over the place, so I'll just fire up my copy and pasting.

Hi @Andrea-Filippini, This is almost ready to be deployed, Daniel has some final tweaks he wants to make before we push this up to the firmware. Slightly confusingly, we already have the documentation live for this but are just waiting to push it to the firmware. Thanks for your patience! Alex

@pchirouze no, it should be: https://docs.pycom.io/pycom_esp32/library/machine.WDT.html