Your software is actually very good!
It's the simplest and easiest way to upload file OTA I found after googling for 1 hour. (Anybody knows something else?)
But.. Can we have an Linux/ARM version (for Raspberry Pi)
or a Linux x86 32 bits
or source code to compile myself
Thanks for your good work
PS: no Windows in this home, no Linux 64, only Raspberries, arduino, ESP8266 and old Linux32 laptop