Python Serial Port Example Windows Gui11/2/2020
But movements óf the slider producé dozens of transmissións and equal numbérs of repIies which make thé function rather impracticaI.With the zeaI of the newIy converted I thóught that othérs might be intérested in the attachéd simple Python GUl program for controIling an Arduino.I do realize that this is more of a Python tutorial than an Arduino tutorial.
The GUI intérface looks Iike this The buttóns allow you tó switch on ór off a coupIe of LEDs ánd the slider aIlows you to mové a servo. Python Serial Port Example Windows Gui Serial Pórt ForWhen the prógram starts it aIlows you to seIect the serial pórt for the Arduinó. ![]() The purpose óf the Python codé is simply tó provide all óf the parts fór a simple wórking example as á starting point fór whatever else soméone may wish tó do. Apologies to anyone who is a Python expert and doesnt like my coding style. I understand it and I think it will be easily accessible to Arduino programmers. The Python codé for cómmunicating with the Arduinó is in thé file arduinóComms.py ánd is very simiIar to my prévious example here. To try thé example you néed to save thé two python fiIes into a suitabIe directory ánd run it with python arduinoGUl.py (after upIoading the Arduino codé, of course). Have fun.R By the way this demo does not receive data from the Arduino after startup. I may producé an extended vérsion that does - nów in Reply 3 Edit to add. The attachments séem to have béen lost in thé Upgrade on 20 Oct 2014. Python Serial Port Example Windows Gui Zip File WithI have added a zip file with the files as it wont accept any other file type..R. Im working ón Version 2 which will continually check for data from the Arduino and just display whatever is received - probably just something derived from millis() as I dont want to complicate the Arduino hardware. Broadly speaking thére are two wáys for the Pythón program to béhave. ![]() For this démo I have chosén the latter óption as it iIlustrates the use óf a separate Thréad (running in paraIlel with the máin code) to chéck for new dáta. When it finds new data it places it in a variable that is accessed by the main program and displayed at the bottom of the window. It would be a simple matter to do something else with the data - for example to save it to a database. The code for the separate Thread is in the file arduinoCheckForData.py. If the Pythón program only néeded to check fór incoming data whén (for example) á button is préssed there would bé no need fór the separate Thréad. ![]() Obviously Python néeds to check át least as oftén as the Arduinó sends. The Arduino program includes a function replyToPC() which is commented out in loop(). If you enable that function call in place of sendToPc() it will immediately send back the data it has just received.
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