【BETA】esp_iot_sdk_v0.9.6_b1 released ！

[ScottR]

I discovered moments ago that in my case the "mem check fail" error was due to power supply issues. I strongly advise anyone else experiencing this error to check the stability of their power supply.

Scott.

[rudi]

Hi, Scott,

Maybe you could refer to this http://bbs.espressif.com/viewtopic.php?f=16&t=211&start=10#p837

Sorry that I can't replicate your problem, I compiled sdk096_b1 and memcheck fail error is fixed

Here is my bin files, baudrate 115200

hi Faye

thank you - will test your bin asap,

btw:

strange :

please, can you make a test: if your modul was boot fine, press the reset button -
what you will get now?

i test the last beta version, and saw strange:
if i connect the modul with power and gpio0 down to gnd for flashmode
i upload the firmware, and after finnish this, the modul start with 'MEM CHECK FAIL!!!'
i disconnect GPIO0 from Gnd and
i test again .. pressed the reset button.. 'MEM CHECK FAIL!!!' Message was in boot text

now i read Scott Post
viewtopic.php?f=7&t=205&p=874#p874

and test a little, i have power off the power supply, and power on
and?
there is no 'MEM CHECK FAIL!!!' in boot text
again
power off, power on
there is no 'MEM CHECK FAIL!!!' in boot text

ok now my test
i push reset button
there is 'MEM CHECK FAIL!!!' in boot text again.

strange

can you please test with a reset button after power on ?

best wishes

rudi

txs Scott!!!
think this can be the magic point!

[rudi]

Hi, Scott,

Maybe you could refer to this http://bbs.espressif.com/viewtopic.php?f=16&t=211&start=10#p837

Sorry that I can't replicate your problem, I compiled sdk096_b1 and memcheck fail error is fixed

Here is my bin files, baudrate 115200

strange faye
thank you for the bin file.

i test just in time your bin file.
all ok - if i boot by power on.


but if i push the rst button ( rst to gnd ) modul reboot with 'MEM CHECK FAIL!!!'
please have a try

best wishes
rudi

edit:
can be, that rst function not clear a register and call boot message 'MEM CHECK FAIL!!!' cosmetic?
can be, that RESET Function set a bit in Register for call boot message 'MEM CHECK FAIL!!!'
can be, that power off, power on clear the bit / not set the bit.
..

[ESP_Faye]

Hi，

"MEM CHECK FAIL" actually means "the Sleep parameters stored in RTC memory are broken and then the firmware will restore the parameters as the default values".
So it is actually a warning, and is useful only when waking up from deep-sleep.

The sleep parameters in RTC memory should be written with the correct checksum, just before the firmware going into deep-sleep.
After wakeup from deep-sleep, the firmware may revise these parameters but does not update the checksum.

So the following cases are not strange
1) after power-on-reset, this warning text is not printed.
Because the firmware know the reset-cause and know that it is not from deep-sleep.

2) If you push the reset button when CPU is running, this warning text will be printed.
because the checksum may have been not updated.
And the firmware will not apply the parameters for safe.

3) If you push the reset button during deep-sleep, this warning text will not be printed.
because the checksum have been updated before going to deep-sleep.
And the firmware will not apply the parameters for safe.

There are many bytes in RTC-memory for customer applications.
You can use this RTC-memory. And a checksum/CRC32 are good for data consistency.

Thanks for your interest in ESP8266 !

[rudi]

Hi，

"MEM CHECK FAIL" actually means "the Sleep parameters stored in RTC memory are broken and then the firmware will restore the parameters as the default values".
So it is actually a warning, and is useful only when waking up from deep-sleep.
..

hi faye,

thank you for clear this.

best wishes
rudi

[ScottR]

It doesn't appear that my previous post went up on this issue, but for me I discovered that the mem check fail error turned out to be a power supply related issue. Using a better power supply fixed the problem for me.

Scott.

[ScottR]

My apologies to the group for re-posting my message. Apparently my browser cache was not updating and I did not see all the subsequent posts (and my original post). It just updated and I saw all the new posts.

Scott.

[ESP_Faye]

It doesn't appear that my previous post went up on this issue, but for me I discovered that the mem check fail error turned out to be a power supply related issue. Using a better power supply fixed the problem for me.

Hi, Scott,

With the bad power-supply, which case occur:
1) the warning text is printed, only when the first power on.
Or 2) the warning text is printed, after deep-sleep.

For the Case 1) the root cause may the CAP on EXT_RSTB is too big.
The case 2) is really related to the bad supply.

Thanks for your interest in ESP8266 ~

[ScottR]

Faye,

I have never used or tested the deep sleep function because I don't need it for my application. I notice the Mem Check Fail message when I power up my ESP module from a power supply that had lower than expected voltage. So I changed to a power supply that is more stable and the problem went away. FYI I am using the ESP-12 module for my testing if that helps you.

Scott.

[tengsw]

great work.
but how can i get the android app to smart config my devices based on esp_iot_sdk_v0.9.6_b1?