sending ctrl chars using sio module

[Fredrik Lundh]

CHale <chale at texas.net> wrote:
> I tried using Serial.Port.cmd(self, str) - where str is a decimal list of
> bytes [4,124].

not sure I follow here (you didn't include
the traceback, so I don't know why that
line offends you ;-).

but I suspect you're looking for a way
to create a binary string from a set of
character values?  (unless the docs says
so, the chances that the "cmd" function
will do this for you is quite small).

here are a few ways to do this:

str = chr(1) + chr(2) + chr(3)

import struct
str = struct.pack("3B", 1, 2, 3)

import string
str = string.join(map(chr, [1, 2, 3]), "")

import array
str = array.array("B", [1, 2, 3]).tostring()

hope this helps!

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