Certain ESP32S boards resetting on boot

[andysheen]

We had some issues with certain ESP32S dev boards that for some reason could not boot the code. We are currently, identifying these by the picture attached (see wonky capacitor placement).

After some tests, we were able to compile the code by setting flash_size to 2mb(16mb). This is weird, as when the flash size is checked with esptool, it responds with 4mb... dodgy boards?

Here's the print of the working boards when testing flash_size
esptool.py --port /dev/tty.SLAB_USBtoUART flash_id esptool.py v2.8 Serial port /dev/tty.SLAB_USBtoUART Connecting....... Detecting chip type... ESP32 Chip is ESP32D0WDQ6 (revision 1) Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None Crystal is 40MHz MAC: 8c:aa:b5:85:1f:58 Uploading stub... Running stub... Stub running... Manufacturer: ef Device: 4016 Detected flash size: 4MB Hard resetting via RTS pin...

Here's one from a working board

esptool.py --port /dev/tty.SLAB_USBtoUART flash_id esptool.py v2.8 Serial port /dev/tty.SLAB_USBtoUART Connecting..... Detecting chip type... ESP32 Chip is ESP32D0WDQ6 (revision 1) Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None Crystal is 40MHz MAC: 10:52:1c:69:a9:28 Uploading stub... Running stub... Stub running... Manufacturer: 20 Device: 4016 Detected flash size: 4MB Hard resetting via RTS pin...

See manufacturer is different.