I just bought cactus whid from aliexpress.
It's a device build with esp8266 and atmega 32u4.
Since july 2017 it's preloaded with exploit agency firmware.
I would like to change the firmware for another,this is not the problem.
My trouble is i don't know how to erase completely the memory,i would like to get full blank memory for install new firmware.
If someone can help it'll be very kind.
PS: Sorry if i'm not in right section.