how to disable ATT debug?

[varna9000]

Hi, first of all, thank you for Zimodem :)

I'm struggling to find how to disable the byte array which is returned by ATT"[MESSAGE]". It looks something like this: [ 130 17 45 ] and is being echoed before any serial message. AT&o0, ATV0, ATX0 and ATQ0 doesn't seem to help. I'm building the firmware from the current master on esp-01.