Of course, that was one of the first actions I performed, but I couldn't write 5+ days testing log! I can just add that all the 4 chips behave in the same way.
flash vendor:
E0h : N/A
flash devID:
4016h
QUAD;32Mbit
crystal:
26 Mhz
In addition, some info from esptool:
read_flash_status:
Status value: 0x0000
read_mac
MAC: 18:fe:34:9e:f3:0a
chip_id
Chip ID: 0x009ef30a
flash_id
Manufacturer: e0
Device: 4016
Detected flash size: 4MB
By the way, my questions were a little bit more complex, basically: is an Arduino-IDE created .bin enough to run on an "empty" ESP? If this is not the case, what are the Espressif modules that have to be loaded in order to have an ESP running? And, finally, what is the rule of the 4 Espressif supplied binaries?
I think all the above is quite obscure to most of the ESP users!