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@Photonsters/photonsters I found several options to exchange data between programs on https://en.wikipedia.org/wiki/Inter-process_communication.

I did some tests using Ram Mapped Files in python on an old laptop using a hard drive. I think this simple method could already fast enough for our purposes. For a 100M file, reading takes 0.09 sec, writing also takes 0.09 sec. What do you think?

Below the code I used.

Master.py (reader)
`

import mmap
import time

with open("hello.txt", "wb") as f:
    h=b"Hello Python!"
    b=bytearray(100*1000000)
    m=h+b
    f.write(m)

with open("hello.txt", "r+b") as f:
    # memory-map the file, size 0 means whole file
    mm = mmap.mmap(f.fileno(), 0)
    while True:
        mm.seek(0)
        t=time.time()
        ret=mm.readline()  # prints "Hello Python!"
        d=time.time()-t
        print ("Done in ",d," secs.")
        print (ret[:20])
        time.sleep(2)

    # close the map
    mm.close()

`

Slave.py (writer)
`

import mmap
import time
with open("hello.txt", "r+b") as f:
	# memory-map the file, size 0 means whole file
	mm = mmap.mmap(f.fileno(), 0)
	mm.seek(0)
	f.seek(0)
	txt="Hello world+" + str(time.time())
	m=txt.encode('ascii')
	h=b"Hello Python+"
	b=bytearray(10*1000000)
	m=h+b

	t=time.time()
	mm.write(m)
	d=time.time()-t
	print ("Done in ",d," secs.")
	print (m[:20])

`

Hello. Is there a way to reinstall the factory firmware onto photon zero s mainboard? A friend of mine attempted to upgrade the firmware and installed the wrong firmware. The printer takes a while to power on and immediately turns off when it does. Contacted anycubic and they recommended that I purchase a new board since I am out of warranty. Their website does not deliver to the U.S. Is there anyway to restore the firmware using the USB slot? Ive got the factory .bin files. Any help would be appreciated. Thanks.