Find and Connect to Com Port for Arduino with PySerial - Serial Communication

This video goes over how to automatically find and connect to your arduino using pySerial!

[StarChild.no]

Wonderful. Today I stopped having to reboot my raspberry pi. Bonus, Codium AI took over(without me asking) and optimized the code for performance, exception handling and best practices.

[ChrisAnja]

Simple, but i thought would be useful. I was work at electronic company, but dont know any programming language yet. Lately learn Python as it community base good, and lot of module. Glad to know that i can use Python also on electronics (even i hear lot people python has slow performance, but stil its good for starter)

[sameerk]

Hello from India... Thank you very much for this easy to understand and very helpful video.

[j.p.wagner]

Holy smokes - this is what I've been seeking for about the last two weeks .. thank you !
Some disgruntled idiot at work decided to leave the company with his HW & SW (python) in a complete clusterfucked state of fubar. No commenting whatsoever .. what a special kind of prick, right ?
Well this tutorial got me back making progress with this diaper-change of a task. Thank you again ..

[kxlmoik]

Thanks ...very much
your simple code
to be easy learn and correct program

[Diwakaryou]

AT LINE 18: port= foundports[i] should be replace by portsfound[i]

[rverm]

Its refreshing to realize Im getting good enough to troubleshoot the program if something isn't going right

[gedtoon]

I use the following function which will find genuine Arduino boards and clones using the CH340 and CP210 USB to serial chips.

def find_arduino():
ports_found =
port = 'None'
look_for = ["Arduino", "CH340", "CP210"]
type = None
for l in look_for:
for p in ports_found:
str_port = str(p)
if l in str_port:
type = l
port = str_port.split(' ')[0]
break
if port != "None":
break
return port, type

[LopserGaming]

This list ports function is hidden in the documentation, thanks for sharing this!

[TheFreshDeals]

thanks good script i'll use it for make my own arduino serial monitor

[vikashkumar-cree]

Hi there, I can find only USB serial CH340 in device manager port (which is connected to COM 3. I can't find Arduino UNO in the device manager port which is why I am getting an error "'SerialException: could not open port 'COM3': PermissionError(13, 'Access is denied.', None, 5)"' . Could you please tell me how to add arduino in port ?

[tomgruenewald]

Hi, thanks for the good videos!

Do you have an idea how I can identify multiple Arduinos on the same Host and connect do a defined Arduino?

[Priyanka-hfqm]

HELLO @WaveShapePlay
PLEASE TELL ME HOW TO FIX THE ERROR: "typeerror 'generator' object is not subscriptable" AT LINE 18: port= foundports[i]
please reply

[cooperthomez]

Is there a way to have this work on either mac or windows devices?

[timothynicholson]

I'm on a mac and the USB devices are read differently. How could one modify this code to use the USB's Manufacturer information to automate finding the Arduino? The following code seems to do the trick, but how can one have python double-check the connection? Thank you for your help!


import serial.tools.list_ports


def findArduino(manufacturer):
for pinfo in
if pinfo.manufacturer == manufacturer:
return serial.Serial(pinfo.device)
raise IOError("Could not find an arduino - is it plugged in?")


ser = (www.arduino.cc)')

[oylulfq]

interesting video.
I tried this without changing code but when I run it the following error is found.

Cell In[4], line 17


Cell In[4], line 15 in findArduino
return commPort

UnboundLocalError: local variable 'commPort' referenced before assignment

****how could it be resolved tell me

[bhanuprakashreddy]

i am getting empty list like [ ], how to solve this

[charlesklein]

i was just looking for the exact video but i dident know what to type in to search for it and it appeared on my screen when i logged into utub. THANK YOU but in Linux or Ubuntu it displays its port in arduino.

[sergei]

Thanks a lot. Please leave a link to the program code in another video.

[stifenjans]

Any suggestion group of people work with these kind arduino n python stuff to join, this library kind a least update, im not to familiar with javascript or johhny5, thank u, my appologize if my text seem worst