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Ground Controller Lvl 1
Message 1 of 2

ESP32 Wroom32 reliability problem?

ESP32 Wroom32 reliability problem?
I have 10pcs in two applications on two HW.
Out of 10 new 1pcs at ESPTools 3.5.7 arduino IDE reports "Warning: Could not auto-detect Flash size (FlashID = 0x0, SizeID = 0x0), defaulting to 4MB" which is defective Flash. On the second piece, the FW webupdate reports "Guru Meditation Error: Core 1 Panic'ed (IllegalInstruction). Exception was unhandled.
Memory dump at 0x4014e850: Bad00Bad Bad00Bad Bad00Bad
Guru Meditation Error: Core 1 Panic'ed (Unhandled debug exception)
Debug exception reason: Stack canary watchpoint triggered
Guru Meditation Error: Core 2 Panic'ed (Guru Meditation Error: Core 2 Panic'ed (Double exception) "

which is a problem again with FLASH, but FW can be loaded via Arduino IDE other pieces work fine. How to solve it? The failure rate is 20% which is enough. What is your experience?

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Ground Controller Lvl 1
Message 2 of 2

Re: ESP32 Wroom32 reliability problem?

I have exactly same problem. 

 

I have my own custom boards. They some time work properly and all of sudden behave exactly same way you described. Same problem with all boards(right now only 3, sample boards).

 

Wondering if someone can help us.