ESP2 WROOM Case marking / Memory size

[rowifi]

I have two types of ESP2 WROOM-32E
One batch has marked XXOH32 another has XXOH28
One batch is a 4MB Memory, the other is 16MB.
I think theXXOH28 is the 16MB type but there are no other markings that identify them as different.
Where is the official information on Case Marking relating to this. I can't see it in the datasheet.

[ESP_Minatel]

Hi,

You can find this information at: https://www.espressif.com/sites/default ... ion_en.pdf

ESP32-WROOM-32E(M113EH6400PH3Q0) - ESP32-WROOM-32E (8 MB)
ESP32-WROOM-32E(M113EH2800PH3Q0) - ESP32-WROOM-32E (16 MB)