[PyQt] Sending 4 bytes Hex data over serial in PyQt

[DeaD_EyE]

First of all, you need bytestrings.
You can put everything into one bytestring or a bytearray:

my_bytestring1 = b'abdx' # bytestring

But you can also work with integers in different representation:

my_bytestring2 = bytes([97, 98, 100, 120])
my_bytestring3 = bytes([0x61, 0x62, 0x64, 0x78])

Then you can send the bytestring via serial.write(my_bytestring1)