Question

I’m using a script importing PySerial
to read from COM4

messages I would like to intercept end with a couple of #

so I tried to use

bus.readline(eol='##')

where bus is my connection.

I expected to read like:

1. *#*3##
2. *#*3##
3. *#*3##

Unfortunalyy I found also

1. *#*1##*1*1*99##

that I expected to read spleetted into 2 lines

1. *#*1##
2. *1*1*99##

Clearly readline is not working but why?

Answer 1

The readline() method in pyserial reads one character at a time and compares it to the EOL character. You cannot specify multiple characters as the EOL. You’ll have to read in and then split later using string.split() or re.split()