1. do all of these programs behave the same way (ie, commands apparently received by device, no response returned)?
  2. If (1) is 'yes', let's stick with the last example. What happens at the call to 'lookfor'? Does it hang, or does it return something unexpected?
Update: are you sure chr(254) is doing what you expect? You are probably better off using pack...

In reply to Re: Reading from a serial device by Illuminatus
in thread Reading from a serial device by gnu lnx

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