> and than i store the read data in a textctrl. That's got nothing to do with pyserial.
Ok i know but for this reason i put : Another point is the textctrl: it store only the first byte and not the other why?, the byte are like 22 and all are readed ------------------------------------------------------------------------------------------------------------------------------- No clue. I don't know what "textctrl" is or what it's supposed to do. a = ser.readline() a = self.textCtrl3.SetValue(a + ' ') For my bad understanding is clear ------------------------------------------------------------------------------------------------------------------------------- What makes you think the port closed? Sniffing the data with serial port monitor i see that the > answer is ok but after the answer the port close, why? The serial port monitor write com port close. ---------------------------------------------------------------------------------------------------------- Dear Grant As you know i'm not a programmer, but i try to do this in my free time. Probably you have reason to write: The code you post is irrelevant. But i try to do my best as in my possibility. I think that in any case you can't run my code if you haven't the same device that i have. So i don't want that you loose time with my stupid question, i'm sure you have a lot of better things to do that help a beginner like me. In any case thanks for your help, and you cordility. Best Regards Luca -- http://mail.python.org/mailman/listinfo/python-list