Linked Questions
16 questions linked to/from Is the gpio readall command compatible with RPi 4?
4
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2
answers
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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 ...
- 143
5
votes
4
answers
3k
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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 ...
- 239
0
votes
2
answers
10k
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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"?
- 103
0
votes
1
answer
3k
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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 ...
- 713
0
votes
1
answer
1k
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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 ...
- 9
0
votes
2
answers
2k
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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 ...
1
vote
2
answers
251
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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 ...
- 11
0
votes
2
answers
791
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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, ...
- 17
1
vote
2
answers
488
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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 ...
- 125
0
votes
1
answer
520
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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 ...
- 115
0
votes
2
answers
96
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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 ...
- 1
-1
votes
1
answer
184
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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 ...
0
votes
0
answers
151
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 ...
- 1
-1
votes
1
answer
85
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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 ...
- 161
-1
votes
2
answers
59
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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 ...
