Most active questions
64 questions from the last 30 days
2
votes
2
answers
218
views
How to log temperature data
I'm looking for a simple, low-maintenance, future-proof way to log the CPU temperature (and ideally voltage data too).
The Raspberry Pi is part of an embedded system attached to vehicles operated by ...
- 151
0
votes
2
answers
99
views
How to read a PWM signal via GPIO on PI 5?
I have custom-made a compact push-type PWM signal generator that operates on 3.3V power and outputs a 50Hz PWM signal with a duty cycle ranging from 0% to 100%. I power it using the Raspberry Pi 5's 3....
- 109
1
vote
4
answers
51
views
Keyboard Matrix And Pull Up Resistors
I have a question about pull-up/pull-down resistors on the Raspberry Pi Pico.
To be as brief as possible - I am trying to create my own keyboard for the learning experience and I wanted to use the ...
- 19
0
votes
2
answers
45
views
PI4J SPI - getting old data
I have a weird issue with receiving data over SPI - I'm always getting "old" data - the data from previous transmission, not the current one.
I want to communicate between Raspberry and ...
- 99
1
vote
1
answer
57
views
Blowing up gpio pins.... what can I do?
I'm using a pi 4 as a thermostat for years. It's working perfectly. Until.... I decided to read the error code from the heating unit. This unit has a relay (dry contact) that pulse the error code. So ...
- 19
1
vote
2
answers
55
views
Adding USB drive to fstab does not mount on boot, but mounts as expected from shell
I want a USB drive to always mount when booting. I am able to mount a USB drive inserted into a Pi4 using this command:
sudo mount /dev/sda1 /mnt/usb -o uid=pi,gid=pi
sudo blkid gives this:
pi@pi:/mnt/...
- 291
0
votes
1
answer
46
views
12V output into GPIO
I am looking to wire this inductive proximity sensor to my Raspberry PI Pico W. I plan to power the sensor with a 12V source.
However, I obviously can't use the naive way since the sensor outputs at ...
0
votes
1
answer
37
views
Raspberry Pi 5: keyboard layout problem
Brand new RPi 5 with the latest Raspberry Pi OS (64-bit). BTW, weird OS, I'll change that as soon as I can.
I'm new to the Raspberry, not much experience with it.
I have a weird keyboard issue :
For ...
- 19
0
votes
1
answer
54
views
No image output on a detected HDMI display
I have a some old F100 Neewer 7" display; "Signal input: 1080p/1080i/720p/480p/480i"
New versions have different key shapes.
I'm trying to get image output connecting it to a RPi 4B+ ...
0
votes
2
answers
48
views
Detected under voltage and then my Pi4B stopped working
some minutes ago the OS detected undervoltage in my Raspberry Pi 4 B and then the Pi gone down and stopped working... i tried using voltmeter to measure the voltage of the GPIO and it is almost good (...
- 1
0
votes
1
answer
45
views
Raspberry Pi 4 as router
My ISP provider is charging very high for Static IP for port forwarding. So I decided to disconnect the internet cable connected to ISP router/modem, and connect to Ethernet port of Raspberry Pi4. I ...
-1
votes
0
answers
40
views
rpi2B v1.1 hardware error, not reading a good sdcard
my RPi2B v1.1 dated 2014 stopped reading SDcard and both red & green lights are constantly on.
Checked sd-card, changed to another one, same problem.
Power is good 4.99V / 3A
When powering on HDMI ...
- 9
1
vote
1
answer
26
views
Docker container not running unless I ssh into RPi
I don't think this problem has to do with Docker at all, but I'll describe the symptom first. I'm running a RPi 4 model B, with 2024-11-19-raspios-bookworm-arm64-full flashed on the SD card a few days ...
- 121
-1
votes
1
answer
31
views
can't boot into Desktop Environment (GUI)
hello so i was stopping services to save up ram on my raspberry pi 3b to install dlib, for that i did disable lightdm and through raspi-config i disabled splash screen and booted into console (i used ...
- 1
0
votes
0
answers
40
views
Busybox when booting
I am running raspberry pi 4. It still work yesterday but got into BusyBox today when I boot. I have tried the command in here and also e2fsck -c /dev/mmcblk0p2 but it only said 2 files have error and ...
- 1