• Hi @user85573,

    can you please share output of esptool.py --port /dev/ttyUSB0 --baud 115200 flash_id as 16MB is missing on my list of ids.

    W25Q40BV ( 4 Mega Bits / 512K Byte ) = ID 4013h
    W25Q80BV ( 8 Mega Bits / 1 Mega Byte ) = ID 4014h
    W25Q16BV ( 16 Mega Bits / 2 Mega Bytes ) = ID 4015h
    W25Q32BV ( 32 Mega Bits / 4 Mega Bytes ) = ID 4016h
    W25Q64CV ( 64 Mega bits / 8 Mega Bytes ) = ID 4017h

    Edit:
    Ups missed than on your post manuf 0xef chip 0x4018

    so it is

    W25Q128FV ( 128 Mega bits / 16 Mega Bytes ) = ID 4018h

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