[Soekris] serial port problems

Henry Spencer henry at spsystems.net
Thu Apr 14 23:35:33 UTC 2005


On Thu, 14 Apr 2005, Paul Komarek wrote:
> I cannot sense a voltage between DTR and GND, whether I set DTR high or
> low (using python and a 3rd party pyserial module that works with my
> laptop serial port).

How old is this 4501?  Early ones had the serial driver chips configured
in an auto-power-saving mode in which they turn themselves off if there
aren't any active RS232 *inputs*.

                                                          Henry Spencer
                                                       henry at spsystems.net




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