WROVER module marking

[DominikD]

Hello,
Is there any way to tell by device marking on ESP32-WROVER-B modules whether it has 4,8 or 16MB of flash memory ?
We have bought modules with both 4MB and 8MB flash and need to tell them apart on assembled PCBs.

Thank you!
Dominik

[ESP_Peter]

We have added 6-bit code on bottom of metal cover from July 15, 2019. The last 2 bit code include the Flash size information . The code of flash size is list as following. If your module is shipped before the date, you can use flash download tool to read the Flash size.

Flash Size code
4 MB (32 Mbit) 32
8 MB (64 Mbit) 64
16 MB (128 Mbit) 28