Raspberry Pi LESSON 4 : Understanding and Using GPIO Pins

[@wwcr893]

Question: Shouldn't board pin 6 be shown as ground, tx on board pin 8 (GPIO-14) and rx as board pin 9 (GPIO-15)? Am I missing something?

[@paulmcwhorter]

Good catch. I will add a note to the video. You can down load corrected pinout here: toptechboy.com/understanding-raspberry-pi-4-gpio-pinouts/pinout-corrected/ Next couple lessons unfortunately also have this error, but I will correct it in future videos. Thanks for your help!

[@SPADMI]

@@paulmcwhorter On the same issue, Board pin 24 should be marked as (GPIO-8), right?

[@paulmcwhorter]

@@SPADMI Thanks, that correction has been made in the downloadable one on my web site now. Thanks

[@aman-sood]

I was wondering that exact thing!!

[@mykyta1235]

unfortunately that url doesn't work anymore :(@@paulmcwhorter

[@opalprestonshirley1700]

I've been doing this since 1979 and I always get a sense of satisfaction seeing the LED come on and go off.

[@paulmcwhorter]

Me too!

[@Slowpaws1389]

Me2

[@brandonzawaski]

Paul, I've rewatched the beginning lessons and up to this point just so I am not missing anything. You are a great explainer.

[@willgordon5737]

Unfortunately, the old GPIO library has been discontinued due to hardware changes in Raspberry Pi. The new method for controlling GPIO is by using libgpiod. Here's an example to turn an LED on and off: Note: You must use BCM pin numbering, not BOARD, which is why GPIO 17 is used in the example. Cleanup is no longer necessary. import gpiod import time chip = gpiod.Chip('gpiochip0') line = chip.get_line(17) line.request(consumer='LED', type=gpiod.LINE_REQ_DIR_OUT) line.set_value(1) time.sleep(5) line.set_value(0)

[@annastrong1146]

Thanks for the shoutout to the ladies. Love your videos. Super helpful. Thank you for making them!

[@GYM_LOVER-q5r]

all ladies deserves this shout out

[@callumm.15]

Following along with the Pi 5 has been smooth sailing up until this video, where RPi.GPIO can no longer be used unfortunately. I will try to follow using gpiod, but it seems more complicated. With that aside, tutorials have been really great so far! EDIT: I noticed the Raspberry Pi documentation recommends using "gpiozero", though it works much differently than "RPi.GPIO" using device objects rather than controlling the pins directly which I'm not a fan of. On the other hand, "gpiod" seems more complicated and above all, has very little documentation (atleast of what I could find). For anyone looking for a library like RPi.GPIO, I definitely recommend "lgpio" which behaves very similarly. The biggest difference it seems is the chip select, but this is because of Pi 5's new structure. This is very easy to use, just by selecting chip "4" (use "chip = lgpio.gpiochip_open(4)" ). Then, follow the "lgpio python" documentation to use the gpio pins by using the "chip" object as a handle. Hope this helps someone!

[@SuleimanAL-Far]

Thank you

[@willgordon5737]

This is the life of an Engineer, old technologies get depreciated and need to figure out how to port the software to the latest tools :(

[@mmulisha1022]

Just Received my kit and started following this series. No programming background at all. (outside CNC and robotic programming). I am loving this series, and looking forward to getting all the way through it.... long way to go. I never thought i would be this happy about a blinking light lol!! Awesome! Homework is done, may jump to lesson 5 tomorrow!!

[@alberttalkstech]

Great!😅

[@ttl5842]

I'm a woman, I love your programs !!

[@MattFacer]

I’ve learnt more in this one lesson than I have over hours of googling!! Thanks. Great video and delivery

[@paulmcwhorter]

Great to hear!

[@BunnLilah]

This is so exciting! I'm thankful you started out very simple because I know the homework is pretty basic but it still took a while for me to figure it out. I'm really excited for the rest of this series! Just turning on and off an LED with code is blowing my mind as someone who has only done basic computer coding. Somehow it feels more magical when you're actually affecting things in the real world!

[@leahswinney5711]

Hello from South Texas! Thanks for the great lesson and video playlist! I recently got a job building weather instrumentation for a university. Most of the instrumentation is done using a Raspberry Pi, and I am just starting out. Just wanted to share my thanks and appreciation for your videos!

[@djbroake9810]

Here from the Arduino course's, This was needed and as good as them. Thank you so much!

[@ricardorodriguez218]

Best coffee tutorial ever! :)

[@tarekazakir9919]

You are the best I am a a stem teenager and I really wanted to learn alot of things about robotics and I found all my answers in your videos. Thank you very much

[@paulmcwhorter]

Great to hear! You are going to go far in life. Maybe even make the world a better place!

[@Event.Horizon.]

You got another woman watching your vids over here, thanks for all the help!

[@paulmcwhorter]

Excellent!

[@andersontiban5356]

Thanks for taking the time to explain the basics for the new guys such as myself😁

[@isimsiz-ok1jg]

I'm surprised there are still good men like you in this world, thank you. :)

[@chandanasrin3252]

Hloo Paul this is chandana , i am following all your lessons from starting , i love the way you teach us ......Thank you

[@halcyonramirez6469]

Thank you so much for this. I do have some programming background but never any hardware. Seeing the LED turn on brought almost a tear to my eye as it reminded of my initial journey in programming. Thank you!!. FYI. folks with a Raspberry pi 5. this instructions wont work. RPi 5 changed some things and code written for previous pis wont work.

[@alanabela1900]

Thank you for all these lessons.

[@daveflatters4981]

If you type ‘pinout’ without the quotes, on the terminal you get a basic diagram of the actual model of Pi you are using, some basic information about it and a GPIO diagram. The GPIO diagram shows the board PIN numbers power and ground pins and the GPIO numbers but there is no extra information about the use of the GPIO pins i.e. UART, I2C etc

[@paulmcwhorter]

Dave, I just learned something new, cool and important. Thanks!

[@VivekAnandJ]

Oh cool! Thank you so much!

[@andersontiban5356]

Thank you for the free course I really appreciate your work

[@madisonhypes5332]

This video is incredible. Thank you so much for all your hard work teaching.

[@Alpha_fitz]

Thank you. You're an inspired person on a mission. Enjoy your work!

[@miguelangelfelipecalle8845]

You the best, I am sharing this key content to my friends. Greetings from Bolivia.

[@floridian080]

After watching this video twice, I see the advantages of library you used over the GPIO Zero library used in Official Raspberry Pi Beginner's Guide. Also, I've been using VSCode on my Pi400 without difficulty. The breadboard adapter makes for a more Arduino-like experience than attaching wires directly to the Pi.

[@keithlohmeyer]

I also wondered why Paul chose this library. After some reading I see that GPIOzero is a wrapper for RPi.GPIO and handles some of the setup code for you. Most of us are coming from Arduino and understand setup and pullup / pulldown so I think RPi.GPIO was the right choice. It is good to know about GPIOzero as you will see it in example code online.

[@charlotteswift]

Hi Paul In the first video for this series, someone corrected you for pronouncing the 'G' in GNOME. I wasn't sure but I was biased towards pronouncing it. Well it turns out that you were right👍(as usual). GNOME is an acronym for “GNU Network Object Model Environment,” and since the 'G' in GNU is pronounced and GNU is the first word in the GNOME acronym, the 'G' in GNOME is also pronounced.

[@carol-lo]

You are superstar! I feel more confident on using the GPIO now. Thanks.

[@lestersegelhorst2776]

I have an obsolete kit from NRI made by fishertechnic. I haven't been able to use since I can no longer run the software A fortran based language geared to the proprietary interface in the kit. Distributed on(5.25" floppies, IBM xt) I would like to use the raspberry pi instead. However this will require running some small 5v motors. I don't want to power the motors from the pi. I need a driver circuit to switch a separate supply to the motors

[@rockymountainfacet5958]

Love your content as always. Thank you!

[@sumantakumardutta986]

Homework solved!!😁 I even added another user-input about the time delay between 2 blinks. So the blinking is sometimes too slow or too fast, depending upon the user-input. 😀 This is really exciting!!😃 And thank you for mentioning the amazing "time" library of Python.❤

[@sunilkulkarni4426]

Excited for the GPIO video !!!

[@CKGamingChannel-w2o]

Something strange is occuring on my 16 channel relay board, connected to a t-cobbler. The GPIO.output, LOW and HIGH commands are inverted in polarity. I really don't understand it. But in the code I have to invert the commands to send signals. Any ideas?

[@rockymountainfacet5958]

I actually did the sum. I did not fold like a cheap lawn chair. I also have my Ice Coffee for this next video. I appreciate you Paul! I defiantly look up to you.

[@paulmcwhorter]

Great job!

[@steffig7282]

You are brilliant Sir. I ♡ that your shirt always according to the tutorial. Greetings from Belgium

[@paulmcwhorter]

Thanks! 😃

[@Compuscience-Python-Prog-Exps]

I've learned how to do a Breadboard because of you Paul. Another KZbin teacher showed me tips to create a breadboard with cobbler. Excellent choice I even recommend it. Cobblers avoid actual Rasp Pi pinouts from getting damaged. I'm just over a year and a half from having this amazing machine It taught me much in such a very short time. Please check out my work. when you have the time... Thanks Paul.......🙂👌👍

[@sachinkumar-eb9mt]

Hi Sir, I am very thankful that you are doing this series. I am using Pi5 and at 35:00 i am getting the error as Traceback (most recent call last): File "", line 1, in RuntimeError: Cannot determine SOC peripheral base address please help me! Thanks in Advanced

[@paddler-sn7ub]

Thank you for the website and tutorials

[@ronwatkins2507]

I've ordered the sun founder package and it's supposed to be delivered.

[@tarekhk]

Hey Paul, I got the RPi 5 and a SunFounder kit but when I try to setup GPIO.OUT I get : "RuntimeError: Cannot determine SOC peripheral base address". My understanding is that the new RPi 5 has a new chip and I cannot use the GPIO library so can't follow your lessons. I have been able to interact with the LED through GPIOD however I don't believe I can follow your lessons as it's very different code lines. What is the best way to follow the lessons? would a cheap Pico be able to use the GPIO library? I can't justify buying an older RPi 4 now as gpio library has been deprecated.

[@paulmcwhorter]

This class is probably better suited for an earlier version of the pi.

[@buddhabrot3]

@@paulmcwhorter Dear Paul, I really enjoyed your lesson so far, sadly I have the kit and pi as well and get the same error messages… it’s quite annoying tbh. As someone without experience it is difficult or impossible to follow your course. Maybe you can talk to sunfounder that they not advertise the set for raspberry pie 5 or ask them if they can pay you to run an updated version. I know this is not your fault but for me on the consumer end it is more than annoying, what I do now with this 60$ half-used set

[@jacksoncontreras2096]

Question: how does the raspberry pi know to output 5 volts?

[@tahababazadeh8444]

Hi Mr.McWorter as always thanks for your great videos . unfortunately in my country with my income I cant afford to buy a raspberry pi although I am really interested and full of ideas and so passionate about it. is there any simulator or anything that I can rely on for learning raspberry pi thank you sincerly,

[@SPADMI]

I don't know is this the better answer for you. Your alternative choice is to buy a Raspberry Pi Zero 2W at US$15. Not that expensive, hoping that it is more affordable.

[@JonahWind-k8x]

Hello! Nice lesson Paul, I understood everything. 🎉But as I wrote in the command: GPIO.setup(11,GPIO.OUT) I got this: RuntimeError: No access to /dev/mem. Try running as root! I tried running the program with sudo python3 and then it worked. Is there another way to solve this problem, because I'm affraid, that if I write a wrong command I could remove the hard/software or something like that.😅

[@gplayer01]

Really cool lesson. Many thanks!!

[@waltmetcalf5354]

import time import RPi.GPIO as GPIO GPIO.setmode(GPIO.BOARD) red=11 GPIO.setup(red,GPIO.OUT) while true: blink_num=int(input("How Many Blinks? ")) for i in range (0,blink_num): GPIO.output(red,True) time.sleep(.25) GPIO.output(red,False) time.sleep(.25) GPIO.cleanup() Homework Lesson 4

[@VivekAnandJ]

Sir in the GPIO pin out you've shown in the beginning (10:40), you've shown pin 6 as TX. However Google images shows it as Ground for Raspberry Pi 4, Model B. Is this for a different model? Thank you in advance for clarifying. 😊🙏

[@cmaguire305]

I've been enjoying these videos, until now. I'm using a Raspberry Pi 5, which doesn't use RPi GPIO. The Pi 5 uses GPIOZero. I'm currently struggling with that! Hopefully I can jump back on these videos, once I figure out what the heck I'm doing with GPIOZERO.

[@NirvanaGlobalFoundation]

Same issue am glad you've raised it I found your comment scrolling for solutions. I'll try using GPIOzero en do more research on it.

[@onlynonsense8723]

Great videos. Some timestamps would help greatly. If you could also keep the picture of you small rather than large so we can see the content, that would be super.

[@SahithaKARAPITIYA-yx3dh]

Thank you Mr. Paul. RuntimeError: Cannot determine SOC peripeheral base address. Could you please tell me why this error appears though I followed the steps in the video? (this occured after the GPIO.setup(11,GPIO.OUT). I am using Rasppi5. Thank you

[@paulmcwhorter]

These lessons are not compatible with Pi 5 as Pi 5 changed how to interact with GPIO pins.

[@SahithaKARAPITIYA-yx3dh]

@@paulmcwhorter so is do you have another seres for pi 5. Or would you recommend any other source?

[@SahithaKARAPITIYA-yx3dh]

@@paulmcwhorter Mr. Paul my goal is to send data from several STM 32 nucleo boards to a raspberry pi 5 and then send it to a cloud server.

[@greatscott36]

Is it possible to write in others instead of Phython?

[@AdolfZcoder]

Hi paul, I just wanted to ask before i buy the kit. Is the raspberry pi included in the kit itself? Or the kit only has components without the raspberry pi. Is the raspberry pi included in the Sunfounder kit? The one you have in the video

[@paulmcwhorter]

No you need to have the pi, it is not included

[@AdolfZcoder]

@@paulmcwhorter Ow ok thanks you, Any suggestions on where i can get a complete Kit and not seperate?

[@maddogmaz1576]

The drawing said 5V but didn't you put it to the 3V?

[@SPADMI]

Does it matter if I put the resistor on the short leg (cathode) instead of connecting it to the long leg (anode) of the LED?

[@paulmcwhorter]

Can go on either side of the LED. Just needs to be in series with it.

[@rzaheer007]

The circuit diagram shows a 5v battery. Does the command 'GPIO.output(11,True)' set pin 11 at 5V by default? Can we set the voltage at any desired level using the output function?

[@paulmcwhorter]

Yes

[@timeforrice]

This guy is amazing!!!

[@imastered9021]

Hi Paul, I'm running into an issue when I run the line "GPIO.setup(11,GPIO.OUT)" It is giving me an error saying, "RuntimeError: Cannot determine SOC peripheral base address." Do you have any ideas why? Thanks for everything so far, really enjoying your course!

[@halcyonramirez6469]

It's cuz the raspberry pi 5 changed. use the gpiozero library instead

[@bendibhafed1687]

Thank you Mr. Paul, This is really interesting.

[@ActualRandy]

Hi Paul - thanks again for providing these materials, they are much more pleasant than reading dry tutorials! Would you be able to check my computations below? I'm trying to figure out how to select the correct resistor. According to my internet research (probably reliable but who knows): * 3.3 volts is the amounted provided by GPIO pins * 1.8 is the voltage drop for the red/green/yellow LEDs in our kit * 8 milliamps is the default max amperage on a GPIO pin * R = (VS - VD) / I, where R = Resistance, VS=voltage supplied, VD = Voltage Drop, I = current So by my calculation and research, the lowest resistor value meeting the 8 milliamp max should be: R = (3.3 - 1.8) / .008 = 187 ohm I.e., we should have at least a 187 ohm resistor to avoid sending too much current through the pin. Am I correct? Thanks in advance

[@tezza3733]

Voltage drop across a diode is 0.6v not 1.2v

[@Dinesh-nb6td]

in which simulation we can make above simulation?

[@malindailankoon]

Tinkercad

[@farazahmed1668]

Thank you so much mister paul.

[@paulmcwhorter]

Welcome!

[@russellfaronijr.6826]

I have a problem with the code for the first program in this lesson. I get this error after the 3rd line of code is entered and it's not a typo I checked several times... Traceback (most recent call last): File "", line 1, in untimeError: Cannot determine sOC peripheral base address >> GPIO.setup(11,GPIO.OUT) Traceback (most recent call last): File "", line 1, in RuntimeError: Cannot determine SOC peripheral base address Any suggestions?

[@cmaguire305]

If you're using a Raspberry Pi 5, you can't use RPi GPIO. You need to use GPIOZERO.

[@RixtronixLAB]

Nice video, thanks :)

[@RobVollmar]

It wasn't easy but I AM LEGEND!

[@paulmcwhorter]

LEGEND!

[@joemurphey4736]

Where are the answers to the homework? List of program so I can learn from it?

[@paulmcwhorter]

Thanks! Really appreciate the support, it means a lot.

[@TradersTradingEdge]

Wonderful, thanks very much. Can't wait to learn more in the next videos. §8-) Have a happy day. 🌞

[@BuzzKiller23]

Is this ever going to be updated for the raspberry pi 5, or did I just waste $50 on this kit?

[@paulmcwhorter]

Perhaps you should have bought the version of the Pi that the class is based around? That would have been another option.

[@BuzzKiller23]

@@paulmcwhorter Your friends at sunfounder said that their kit is compatible with the pi 5.

[@andrewmueller8803]

Don't be mean, you are such a buzz killer.

[@CKGamingChannel-w2o]

It sounds very stupid I know, but try inverting the low high commands in your code and see if it helps.

[@tpobrienjr]

Cool stuff, indeed!

[@martinlewis645]

[@paulmcwhorter]

LEGEND!

[@OZtwo]

Let us all sing: My LED is on! My LED is on! wow, LOVE to see that my LED turn on!

[@arjunsaibo]

Dear Sir please upload early.. Please release today only, lec4 and lec5

[@goku64100]

no one's been killed with an led YET

[@keithlohmeyer]

Homework number 3 for this lesson kzbin.info/www/bejne/eHWQmpyvm958Z6c Paul suggested you could blink multiple LEDs independently without using threading. I took the challenge.

[@poggiostefano]

I wish you were my Physics Teacher

[@ion4497]

thanks !!!

[@tkklein]

How's your church plant going??

[@paulmcwhorter]

Slow, but progressing. Purchasing property is a challenge right now.

[@tkklein]

@@paulmcwhorter I see, do you need more donations?

[@paulmcwhorter]

Thank you for your kind thoughts. Actually I dont get donations or support for the work I do here. I support it from the work I do on this channel. So, supporting the channel supports the work I do here. The problem with property purchase is one of finding the right spot at the right price. Also, most property here does not have a title, and then issues of easements and other things make it a challenge. So, we continue to try and work through all those issues. Thanks for asking.

[@tkklein]

@@paulmcwhorter Ok, makes sense. I will be praying!

[@TheCourtoh]

I am legend!

[@TheUnofficialMaker]

link: kzbin.info/www/bejne/noi6pqZ8pbqtsLM for the homework. This was fun..had to keep playing with it.

[@paulmcwhorter]

A+

[@maddogmaz1576]

True turns mine off

[@karliskide2460]

Thank you for the lesson! Starting series on Raspberry Pi as well. So here is my homework solution for this one: kzbin.info/www/bejne/sGataKqFjL6Nftk

[@paulmcwhorter]

LEGEND!

[@captainprototype187]

ok, my fist 10 minutes done. Will return later for the next 10 minutes..

[@Greebstreebling]

sorry, took too long to get into it....:) :)

[@davidschnider1297]

Hello Paul. thank you for another exciting and challenging lesson. Here is my homework assignment... please forgive the untidy desk...thankful to have found the SunFounder Kit and though the kit.. I found YOU. God bless you, Brother Paul. oh.. here is the link to my homework video kzbin.info/www/bejne/jonQcoGLr7Bpp8k

[@paulmcwhorter]

Excellent!

[@alberttalkstech]

This is my Homework link: kzbin.info/www/bejne/Y5raiIqZqM5lbrc

[@paulmcwhorter]

EXCELLENT!

[@lorisrobots]

Thanks for the great lesson - I have been traveling in my RV lately so I am a bit behind in the lessons. Trying to catch up while I still have internet. Here is my homework video: kzbin.info/www/bejne/npPShoFqmp10qpI

[@paulmcwhorter]

LEGEND! Nice build, good work.

[@karenjackson2887]

I'm a gal

[@Wythaneye]

Lesson 4 uploaded: kzbin.info/www/bejne/eKS5Xn2QgrVlb80

[@paulmcwhorter]

Brian the link seems to go to Lesson 3 solution.

[@Wythaneye]

@@paulmcwhorter Good catch, link is fixed.

[@vaclavkasal3875]

boom

[@roguedan6076]

Thank you for this series, really enjoying it. My homework is here: kzbin.info/www/bejne/epKYfX13ftuja5o

[@drmonkr]

Not working for GPIO.setup(11,GPIO.OUT)

[@SuleimanAL-Far]

can you help me please , I can not understand this error and how Can I solve it ?? pi@raspberrypi:~ $ python3 Python 3.11.2 (main, May 2 2024, 11:59:08) [GCC 12.2.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import RPi.GPIO as GPIO >>> GPIO.setmode(GPIO.BOARD) >>> GPIO.setup(11,GPIO.OUT) Traceback (most recent call last): File "", line 1, in RuntimeError: Cannot determine SOC peripheral base address

[@SPADMI]

my homework submission: drive.google.com/file/d/157jwlQiHmHkj4bUsIvJZOopQ19Hsg-GT/view?usp=sharing

[@paulmcwhorter]

Can you add to youtube . . . most people wont click on google drive links