Hi, We are using the ESP32-WROOM, so I don't have access to the flash voltage lines. EN is pulled to high voltage at all times. What could explain the difference in boot behavior between the automatic constant reset (and getting checksum fail) vs doing a manual reset and then the boot successfully c...

I have some more results based on the above. 1) I upgraded the IDF version to 3.3 just to make sure I'm on a more recent branch (We were previously on an older IDF version) 2) I added the logging at the beginning of the 2nd bootloader as suggested The crash happened on one out of 7 devices again las...

Thanks.

For the I2C pins - IO21 is SDA, and IO22 is SCL on our device.

Regarding the 2nd bootloader logging - I haven't changed that from the IDF defaults. How do I go about enabling the logging?

Thanks for the response! I assume by "which GPIO are you using", you are referring to IO0 and Reset? If so, both of those are pulled high at all times, through a 10k resistor. We have the capability to enter programming mode by jumpering those pins, but normal operation always has those pins pulled ...

We have a device based on the ESP32-WROOM which works most of the time. The ESP32 is reading an I2C accelerometer constantly, once every 20 ms. Some of our products can last forever running code - but every so often we see a device get a reset in the ESP I2C driver code. This in of itself is interes...