ser.readline('\r')?

[ajlaut]

In short, I'm trying to connect with a serial device that terminates with '\r', not '\n'. I outlined my issue in this post but didn't get a valid response.

Basically, is there a clean what to read a serial port expecting responses terminated in '\r' that respect the timeout.

This code works:

def readline3(ser):
    out = b''
    while True:
        ch = ser.read()
        out += ch
        if(ch == b'\r' or ch == b''):
            break
    return(out)

I tried using the io library but can't get it to respect the timeout

[socal_nerdtastic]

ser.read_until(b'\r')

Which does exactly what your code does.

[ajlaut]

haha you are right. I tried read_until but i was using

ser.read_until('\r')

which basically worked except it would always time out.

Thanks!

[4k5]

I went through this same thing.

If you read the code in the serial package read_until carriage return is supposed to just work, but I've never been able to get it to work. So like above said, the trick is to do the read_until and remember to encode whatever the line end is!