Linked Questions

5 votes
2 answers
24k views

wiringpi is missing from bullseye. how do i install it?

I get the following when trying to install wiring pi on a fresh bullseye image. Anyone have any way to get it installed? $ sudo apt-get install wiringpi Reading package lists... Done Building ...
user1816847's user avatar
5 votes
4 answers
3k views

What is the correct way to access GPIO on RPi?

I have a brand new Compute Module 4 with Raspberry Pi OS installed. The system is up-to-date, but I cannot read GPIOs or change their state. $ gpio -v gpio version: 2.52 Copyright (c) 2012-2018 Gordon ...
nowox's user avatar
  • 229
0 votes
2 answers
7k views

What "wiring" pin numbers on Pi Zero pinout diagram mean

On the below diagram I understand what position (on the board), GPIO (abstract Pi GPIO numbers) and BCM (SoC pin numbers) pin numbers mean, but what's the meaning of the "wiring"?
axk's user avatar
  • 103
0 votes
1 answer
2k views

Reconfigure pi GPIO default states

The default states (right on boot), on my pi are: +-----+-----+---------+------+---+---Pi 2---+---+------+---------+-----+-----+ | BCM | wPi | Name | Mode | V | Physical | V | Mode | Name | wPi ...
Ionică Bizău's user avatar
0 votes
1 answer
1k views

Micro Switch implementation in Raspberry pi

I am a beginner using a raspberry pi 1 model A+ to create a production counter that would count the material as it would hit the switch and that would be counted as 1. The issue I am having is that I ...
Kevinh2's user avatar
  • 11
0 votes
2 answers
988 views

How do I diagnose GPIO issues?

I was soldering LEDs in an extended line the other day when I accidentally forgot to shut my Raspberry Pi 4 off. I continued to solder and soon enough shorted my Pi out. It rebooted quickly and all ...
Hopper964's user avatar
0 votes
2 answers
653 views

How can I read the current ALT-Mode of a GPIO PIN?

i have a Hyperpixel 4.0 Touchscreen, which i use one my Raspberry PI 3b+ This Touchscreen is attached directly on the 40 GPIO-Pins and a few Pins have some special Alt-modes. Out of personal Interest, ...
Manuel Neff's user avatar
1 vote
2 answers
177 views

GPIO pin confusion

So far, my ignorance was bliss. I was able to control the GPIO pins and for many years, the world made sense to me But then I saw this: And wires got crossed in my brain Why does it say that GPIO7 is ...
Chris V.'s user avatar
1 vote
2 answers
423 views

Is this an effective way to test GPIO 15?

I'm working with a Raspberry Pi Zero 2 W running Linux raspberrypi 5.15.61-v7+. Is this a reliable way to establish that I have a non functional GPIO 15? First, I establish that my test mechanism ...
Eric Johnson's user avatar
0 votes
1 answer
462 views

Using WiringPi with more than two chip selects and MCP3008

I am trying to get more than two chip selects available on the Pi. I have the devices present, but am struggling to read a MCP3008 when the CS is plugged into the additional GPIO pins. My end goal is ...
nullPainter's user avatar
0 votes
2 answers
91 views

GPIO pins remain low

Im using the command line to set the mode and value of my pins. When I use, gpio allreadall I can see that all my pins are set to LOW and INPUT-mode gpio -g mode 17 out Sets the pin to OUTPUTm but ...
Jack's user avatar
  • 1
-1 votes
1 answer
169 views

WiringPi INPUT causes voltage below nominal 3.3v on pin with pull-up

Libs: wiringPi Hardware: Pull-up resistor (10k) to 3.3v on GPIO 24 (=THERMO_BUTTON_PIN) floating GPIO 4 (=AUDIO_BUTTON_PIN) In short, I want to implement an auto-recognition for one of two ...
jake_asks_short_questions's user avatar
0 votes
0 answers
140 views

Raspberry 4 Java Pi4J GPIO Input not changing state

I am trying to use my Raspberry Pi 4's GPIOs to turn on various thing in my smart home. I am getting 2.6V on the GPIO Input, thus resulting in a HIGH signal. I have confirmed this with a basic python ...
Dahlin's user avatar
  • 1
-1 votes
1 answer
83 views

Why the GPIO light gets switched ON but not SCL1

I am trying to make this circuit I have only attached two pins. By default shouldn't both pins be ON? Why only GPIO 17 is ON (shows light)? I notice that once I connect all the wires, the GPIO ...
Manu Chadha's user avatar
-1 votes
2 answers
58 views

Raspberry Pi 4 GPIOs are constantly on, even after restarting and cleaning up GPIOs

So, I got a Raspberry Pi 4 Model B, and I'm trying to make a project using relay boards. Turns out, when I turn on my Pi, one of the pins is already active and the indicator turned on partially. I ...
bruhboi123345123's user avatar
0 votes
1 answer
31 views

Canonical means of translating pin identifiers in Python?

[Python, at least for now.] Is there a standard way to translate between the various naming formats for RPi GPIO pins? I.e., given a pin identifier in one of these forms: "BOARDn", "...
RoUS's user avatar
  • 105