Questions tagged [gpiozero]
For questions relating to the python gpiozero library.
95
questions
0
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0answers
16 views
UART communication between Rhino DC servo motor and RPi4 B
I want to communicate with this Rhino DC servo motor with RPi4 B. I enable uart3 in RPi4 by modifying the /boot/config.txt file. In this file, I add dtoverlay=uart3 in the last. When I used ls /dev/...
1
vote
1answer
20 views
GPIOZERO how to install lastest version on Ubuntu 20.10 servver
I am running gpiozero on my Raspberry Pi4 Ubuntu 20.10.
I need to update gpiozero (1.2) to latest version (1.6.1) to use the RotaryEncoder class which is not present in the package I have installed
...
1
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0answers
43 views
Rasberry Pi 4 LED.off() will not turn led off in a function
I have a simple circuit connected to my Raspberry Pi 4 with 3 push buttons and an LED. The buttons are connected to gpio2(pin 3), gpio17(pin 11), and gpio16(pin36), with the LED connected to gpio25(...
0
votes
1answer
56 views
RPi.GPIO: multiple buttons one callback function, ignore buttons while callback is executing
I have 4 buttons connected to my Raspberry Pi that call the same function when pressed. I'm using GPIO.add_event_detect to connect the buttons to the callback function. When one button press executes ...
0
votes
1answer
67 views
gpiozero button to raise SystemExit / gpiozero clash with GPIO.cleanup()
TL;DR: Since this is a long question I have the following problems:
I'm looking for a good way to use gpiozero Button to raise SystemExit upon button press
I have an imported module to drive an E-Ink ...
0
votes
0answers
25 views
Robot Function Queue
I'm trying to build a restful microservice that controls my robot. Basically, someone(or an app) can hit a URL and move my robot. This is just for fun on my local network. So far, it works well enough ...
-1
votes
2answers
78 views
LEDs not turning off after Raspberry Pi power down
I have a Raspberry Pi with six LEDs and button (also with LED) on the custom circuit board that is connected to GPIO pins. This RPi previously had an AdaFruit Neopixel with LEDs, but later my client ...
-1
votes
1answer
63 views
How to know if a pin is assined in raspberry pi?
I'm "playing" with Django and I'm trying to read the state of a pin when a button is pressed using gpiozero. I'm able to do this without trouble outside Django, meaning that I can detect ...
0
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1answer
46 views
GPIO Soundboard with just one button [closed]
i am trying to program a soundboard in python using gpiozero and a single button.
Every time you press the button it should play the next sound.
It almost works, but unfortunately not satisfactory yet....
0
votes
2answers
508 views
Using Gpiozero for Relay Device
I am writing a Python app on my RPi to manage an 8-port Sainsmart relay. All that I need to do operate a port on that relay is to change the state on a GPIO pin to either low or high. I cannot find ...
0
votes
1answer
31 views
Python tkinder reset button code fails on third attempt
I am trying to trigger a timer when there is audio and stop the timer when the audio is lower than a set value. There is a reset button that will reset the timer back to zero. The reset button works ...
0
votes
1answer
72 views
gpiozero's LED.toggle() switches LED again after some seconds
I am using the gpiozero library to controll a LED strip and a relay connected to my raspberry pi 4. This is the way I connected the LED strip to the pins. I use a type SMD5050 LED strip similar to the ...
0
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0answers
27 views
Fast/efficient code to wait for trigger, trigger causes camera to collect image stream, process, wait for trigger, wash rinse repeat
I am working on a project to detect trained objects with google coral once I capture images (temporarily, i.e. cache) upon an external trigger. The focus here is the front end trigger and capture ...
0
votes
2answers
97 views
Cannot connect to UART via USB
I am trying to connect to a raspberry pi zero (and a pi3) via uart and USB (USB to TTL YP-01)
I am connected to pin 8, pin 10 and a ground. tx -> rx, rx -> tx
I have tried everything on this url
...
0
votes
1answer
60 views
Register button presses within button press function?
I'm working with code that looks something like this:
from time import sleep
from gpipozero import Button
BUTTONS = {
'start': Button(21),
'choice_1': Button(1),
'choice_2': Button(7),
}
...
0
votes
0answers
37 views
Why don't my LEDS stay on when the guizero buttons are pressed?
I wrote a simple python dashboard, using guizero and gpiozero, to turn LEDS on and off. I only have a problem with the LEDS, they only turn on for 1 second before they turn off. I tried to use time....
1
vote
3answers
120 views
How exactly do i make a LED Blink? I tried every possible result
I am trying to make a LED blink on a Raspberry Pi Breadboard, but after everything I've tried, it doesn't work.
I have tried:
Changing wires and moving them around
Switching LED's to check if the ...
0
votes
1answer
107 views
Using gpiozero and RPi.GPIO in one script
I use the gpiozero.MotionSensor to detect motion and upon motion to change the state of GPIO pin 17 using RPi.GPIO.
This works well.
At the end of the script I clean up using RPi.GPIO.cleanup(), but ...
1
vote
2answers
257 views
GPIOZero- How to double button press?
I am new to Python, used my Python common sense but did not get any results. I am trying to learn how to do x-times of button presses and in x-amount of time to trigger something. In the below code, I ...
1
vote
1answer
252 views
gpiozero on a pi4?
Working on getting some working samples setup for my son on his RPI4 so he can play with the GPIO's, breadboard, and some various pieces to use with the breadboard. Right now we're trying to test out ...
1
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1answer
775 views
High Impedance state for GPIO
I've not used GPIO on RPi much. On other hardware, the GPIO pins can be configured in software to be in a "High Impedance" state (Hi-Z). I have assumed that it's possible to place most of ...
1
vote
2answers
71 views
Breadboard circuit with LED going through 2 circuits doesn't work as expected
I have the resistor, GPIO24, and the LED anode connected along the same row of a breadboard. The signal from GPIO24 works as expected, but any signal from GPIO23 is lost and the LED will not light. I ...
1
vote
1answer
73 views
RGB LED - Only first color activates when multiple colors are called
I have one RGB LED (common anode type), and while I can get every color to light up independently I am seeing some bizarre behavior when trying to combine colors. This is my first project involving ...
0
votes
1answer
101 views
Long/short button press doesn`t work with IF statements - Need some help [closed]
I am trying to build a simple game and I have the following problem.
My code is executed but the button presses cannot be detected whatever I am trying.
There are no errors and I cannot figure out why ...
0
votes
0answers
142 views
PIR sensor connection to the Raspberry Pi not working
I'd like to connect a PIR sensor (HC-SR501) to the Raspberry Pi, namely GPIO BCM 4. But the pin level always reads as 0.
If I assemble a standalone circuit with PIR (its OUT pin - resistor - LED - GND)...
0
votes
1answer
72 views
Show boot info on character LCD
Is it possible to show boot log or info on a character LCD that the Raspberry Pi is still booting?
I'm using a generic 16x2 character LCD
2
votes
1answer
1k views
GPIO inputs don't work on Raspberry 4 running Ubuntu
I have several RasPIs set up with Ubuntu Server 18.04 64Bit. One freshly setup up RasPIs 3B+ and two 4Bs. On all I can run the following minimum script without any error messages:
#!/usr/bin/env ...
-1
votes
2answers
163 views
Problems with the rpi zero and relay [closed]
I Have a problem...
(above the relay-coil Datasheet)
I want to control a single relay with my pi zero, but it seems that it doesn't have enough power.
the 3.3V pin of the rpi (measured to 3.19V) works ...
1
vote
0answers
116 views
I2C, SPI and Python Libraries with Raspberry Pi 4b
I've been working with RPi.GPIO so far but I have had issues with PWM and edge detection, which are well known issues with RPi.GPIO, anyway, after some research I'm considering using a different ...
0
votes
0answers
97 views
when_pressed and when_released functions in gpiozero not working
I have the following code, and I cannot figure out how to make when_pressed and when_released work. The callback functions just do not run to the press and release.
On the other hand, properties such ...
0
votes
1answer
111 views
PWM problem in a frequency less than 100Hz
I have attached a fan to pin #17 (through a transistor of course) and am writing a script to turn the fan on for a specified duration with a specified PWM duty.
#!/usr/bin/env python
import os
...
-1
votes
1answer
686 views
function to wait for any of the buttons press
I'm working on a project that use four buttons to navigate in a menu. The root options of the menu have nested options etc. The buttons don't have hardware de-bouncing.
My ultimate objective is to ...
2
votes
1answer
191 views
gpiozero for remote gpio control not work
i just knew how to control gpio from my laptop to desire raspberry pi using gpiozero. so, i following this docs on how to configure the raspberry pi and my laptop to performing remote gpio control. i ...
0
votes
1answer
142 views
Increase sleep interval for LED sequence whenever button is pressed. (Python)
This is the code:
#!/usr/bin/python3
from time import sleep
from gpiozero import LED, Button
from threading import Thread
from signal import pause, signal, SIGTERM
LEDs = [5, 17, 22, 19, 26]
LIGHTS ...
-2
votes
3answers
57 views
What is simplest Python code to call the begin_time function with the value of time equal to 5 when the launch Button is pressed?
I have the following code:
def begin_time(time):
print(time)
from gpiozero import Button
begin = Button(27)
I want to call this function with time = 5
Any help would be appreciated
2
votes
2answers
104 views
Can I use the Python Interpreter to list a modules' classes and methods, as well as descriptions? [closed]
I believe there is documentation available online, but for the sake of learning a little more about the interpreter, I am specifically wondering if I can use it to find out what is all available for ...
0
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0answers
45 views
Interrupt Servo once movement has initiated
I'm new to python and RPis. I'm building my own robot to learn.
I manage to control my little robot and move it around, as well as moving the pan camera with my keyboard.
While I was searching for a ...
1
vote
1answer
2k views
Please set pin numbering mode using GPIO.setmode(GPIO.BOARD) or GPIO.setmode(GPIO.BCM)
I've got an LED on bcm 18 and a servo motor on bcm 8. My code appears here.
from gpiozero import LED
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
GPIO.setup(8,GPIO.OUT)
servo = GPIO....
2
votes
1answer
101 views
How do I incorporate a button for pedestrian crossing when making traffic lights?
Here's a link to what I have been trying a accomplish: https://projects.raspberrypi.org/en/projects/physical-computing/9
Near the bottom of the page it says, "Try adding the button for a pedestrian ...
1
vote
1answer
603 views
While loop picking up button press twice with gpiozero
good morning! I've been working on some python (pretty new to the language) to control some buttons and LEDs utilising gpiozero and I've run into a few issues which I've been trying to troubleshoot ...
1
vote
1answer
629 views
Using GPIO from my virtualenv
I have a project I am developing with python3. I would like to add some status LED functions to it.
If I am not root everything is fine, my activated virtualenv is all good, but I cannot use GPIO (...
0
votes
1answer
122 views
How to wire a button
O have tried to do this so many times, so many websites, so many books, and it just won't work. I do not know how to wire it so that the LED lights up when I press the button. I'm pretty sure that I ...
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votes
1answer
36 views
How to make lilypad temperature sensor work with raspberry pi zero?
I discovered a lilypad sensor thought of connecting it with raspberry pi zero to measure living room temperature. But lilypad sensor is analog input and pi doesn’t have analog pin.
How can i make ...
3
votes
0answers
103 views
Raspberry Pi button bug, what is happening?
I am new user of raspberry pi. I have two buttons, and some code to run, yet the led will not react to the buttons. It's probably a easy fix, but keep in mind, I am new to robotic and have only ...
3
votes
2answers
1k views
Does gpiozero need RPi.GPIO?
I'm trying out gpiozero, but after running the examples from their documentation, I still get this errors but it still runs ok.
gpiozero is installed on venv using pip3
#!/usr/bin/env python
from ...
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vote
0answers
41 views
Can pulse widths on output pins be specified when using the RaspberryPi Gpio library?
According to the AngularServo documentation in the Gpiozero, one can set an angle for a servo (which of course in fact sets a pulse-width), or a value (where 0 is one end of a range and and 1 is the ...
0
votes
0answers
63 views
HC-SR04 Ultrasonic Rangefinder readings are way off
So im trying to make my Robot move by itself and then make a turn until the path is clear using the HC-SR04 Ultrasonic Rangefinder, but my problem is that my readings are off with a large margin, ...
0
votes
1answer
81 views
GPIO pin numbers for gpiozero class
So im trying to learn robotics with raspberrypi and I am following two different guides where I chose the wiring from one guide and the code from the other guide.
My left motor is working but the ...
1
vote
1answer
437 views
Programming MLX90640 to display what I want [closed]
Yay. Got my MLX90640 working and boy it works great. However, the ambient temp of around 20C keeps showing as a green background and i would like it to be blue or even grey. Has anyone attempted to ...
5
votes
1answer
2k views
How fast can GPIO pins toggle on the Pi 4?
Benchmarking of the Pi 4 using the Python GPIO Zero library shows a significant increase in the frequency of toggling a GPIO pin on and off compared to previous models. This result is attributed to ...
