Questions tagged [pi-4]

For questions that apply specifically to the Raspberry Pi 4 and not other/all models.

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88 views

Rpi Thonny python IDE has a problem running Pynmea2 GPS program. How to fix it?

I can't run this gps program in Thonny IDE. How come I can only run this gps program when I run it in the terminal without sudo? Is there a way to fix this? EDIT: The part without the print(gps) and ...
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22 views

Problems/laggy system by pulling ethernet cable

I have a RPi4 with dietpi node.js express socket.io serving a html-gui to monitor and control some gpios. Using chromium as frontend on the 7" raspberry touch monitor in kiosk mode to display a ...
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2answers
134 views

over-current condition on usb port when connecting arduino nano

Hi I am trying to power an arduino nano via usb port. I am using a 5V 3A power supply. I have 2 different usb cables. One lights up the arduino, but it is not recognized in /dev/ttyACM0 The other one ...
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0answers
43 views

RFID to Raspberry pins

I am working on a school project and need to connect Rfid RC522 and tuchscreen to raspberry, problem is that tuchscreen is using same GPIO pins as Rfid, I Got suggested connect RFID using I2c And use ...
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2answers
157 views

bluetooth is not working after updation

am using pi 4 8GB for last 6 months everything was going well. Last week i updated my OS(raspbian). After that bluetooth is not working properly. i can able to pair a device successfully, but am not ...
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2answers
237 views

Fan won't turn off on shutdown

I am trying to make sure my fan turns off when I power off my raspberry pi (without having to unplug it). My fan is connected to the 3.3V pin. I didn't connect it to the 5V pin because I deemed the 3....
1
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1answer
151 views

How do I pair an Apple Magic Trackpad 2 with RPi4?

Can an Apple Magic TrackPad 2 be paired with a Raspberry Pi 4 , so that I can control the Raspberry Pi 4 with the TrackPad 2 via a wireless connection ? If so, how do I set up the wireless connection ...
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1answer
112 views

Can't install sox on raspberry 4b

Here is what I get: pi@raspberrypi:~ $ sudo apt-get install sox Reading package lists... Done Building dependency tree Reading state information... Done Package sox is not available, but is ...
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0answers
151 views

Puffin browser on raspberry pi 4 64 bit

I need to run puffin browser on my raspberry pi 4 running kali linux which is a 64 bit os.The deb package puffin.com offering is armf that is for 32 bit operating systems. I need arm64 version of ...
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0answers
43 views

How to power PCA9685

I am using the RP 4B and am trying to control a servo with the PCA9685. Unfortunatelly I am very new to all that and therefore I don't know which specific components I need to power it up. I bought a ...
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1answer
27 views

PiCamera V2 NoIR and AMG8833 thermal sensor mmal_vc_port_enable: failed to enable port vc.null_sink:in:0(OPQV): ENOSPC

Hardware used: Raspberry pi 4b, 4 gb ram, AMG8833 thermal camera, PiCamera V2 noir, ALL brand new, i just bought them few weeks ago. Im trying to do finish a project and i ran into a not that good ...
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19 views

Change slew and driving current GPIO raspberry Pi 4

When I generate a clk signal 2.4MHz usign GPIO4 and internal PLLD I obtain a signal that seems to have a driving limitation. I have seen that for previous Raspberry models there are PAD registers ...
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1answer
195 views

Raspberry pi with HDD and SSD not booting on reboot

I have a Raspberry Pi 4 B with 2 disks connected via usb. One is an SSD and the other is an HDD. Both of them are in SATA to USB cases that have their own power supply each. I've configured the Rpi4 ...
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0answers
16 views

SSL certificate for multiple dock containers running on RPI 4

Hi guys I have a question regarding docker containers and ssl certificates. I want to install more than one docker containers like pi hole , Bitwarden and motioneye . To access them I have to type ...
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27 views

How to change desktop theme using a .sh file? (RASPBERRYPI OS)

I have been playing around with raspberrypi os and the hardware its self. But besides i have a question i wan to ask, How do you change the desktop theme of raspberrypi os using a .sh file? Or is it ...
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1answer
57 views

Raspberrypi4B: Unable to establish a BLE connection between RPi4B and Ubuntu Laptop

I am unable to establish an ble connection between my Raspberrypi4B and Laptop. Configuration is as below: Laptop: Ubuntu-20.04.2 LTS, bluez version: 5.53 Raspberrypi4B: Ubuntu-21.04 bluez version: 5....
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1answer
45 views

Is there a way to connect a serial cable to my pi while it is connected to my breadboard?

Currently I have my pi connected to my breadboard using a cobbler and breakout cable so I can connect some sensors (DHT22 and BMP280). Is there are way I can also connect my serial cable to it so I ...
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0answers
39 views

Raspberry Pi 3+ / 4 wifi connection problem

I am setting up the RPis 0W, 2, 3, 3+, and 4 for some tests. For the connection to the internet, I use WiFi. The setup worked as expected till the Pi 3+, which refused to connect to the router. Then I ...
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0answers
46 views

Can't connect to Raspberry pi 4B via WAN IP

I have installed and configured owncloud 2 months ago and port forwarded ports 443 and 80 on my router. Back then it worked flawlessly, but now it does not for some reason. The Owncloud server works ...
3
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1answer
206 views

What is this 8-pin fpc place On RPi 4?

I was looking at my Raspberry Pi 4B and I saw something like a not soldered place for fpc connector and I got curious what is that!??? just Look under USB2 at top right corner in the image bellow.
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57 views

Raspberry pi 4 gives vertical color lines on bootup

I am using a Raspberry pi 4 model B 4GB with ubuntu 20.04 installed on a 32GB memory card and when I booted, I got a display with vertical color lines. I tried using multiples displays and all results ...
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1answer
36 views

Kodi unusable on RpiOS desktop

I have raspberry piOS with i3 desktop. I followed the instructions on this page, which describes official tweaks for rpi4 and Kodi. Initially I set the gpu mem value to 1024 and it wouldn't boot. So I ...
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0answers
61 views
+50

Raspberry Pi 4 won't connect to hotspot created by laptop running ubuntu 20

I am working on a project where I need to connect my RPi 4 to a laptop hotspot. Everything was running OK when I had Ubuntu 18 LTS installed on laptop. After I switched to Ubuntu 20 LTS, RPi 4 won't ...
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1answer
241 views

I would like to install blender on my raspberry pi4 [closed]

I am trying to install blender 2.79 from the software packages on my new raspberry pi4. It won’t do it. How do I install and run blender?
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24 views

Raspberry pi OS screen seems to dim on low lit desktops

I have a raspberry pi hooked up to my screen, all the ambient light dimming features of the screen itself are turned off. There are two desktops (dwm), one with Terminator open and the other with ...
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1answer
190 views

Unable to install TVHeadEnd PVR client - Missing PVR Clients add-ons section in Kodi

I have followed theese quides: how-to-stream-digital-tv Kodi on Raspberry Pi OS / Raspbian Buster Installed KODI on RPI 4B. Also have installed working TVHeadend server. But cannot get ...
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2answers
39 views

Raspberry Pi 4 does not respond ssh

My setup is a RaspberryPi4 with SSD (Kingston 120GB) as boot drive. It has also a regular HDD connected to it. Both hard drives are connected to a USB dock via 3.0 USB. The dock has also a power ...
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2answers
107 views

Trying to debug why the magnetic sensor of my MPU9250/6500 Gyroscope Acceleration Magnetic Sensor won't connect via I2C but all the other sensors will

I am trying to debug why the magnetic sensor of my MPU9250/6500 9-Axis 9 DOF 16 Bit Gyroscope Acceleration Magnetic Sensor IIC/SPI won't connect to my Raspberry Pi 4+, but all the other sensors will. ...
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0answers
17 views

Noise on interrupt pins while using Hardware PWM

i have been using the RPI4 to control 2 brushless motors with encoders, using 2 PWM signals to the motor driver, and reading both 3.3 V encoders(2 channel resolvers each) using interrupts. If i move ...
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1answer
60 views

Pi4 mass storage gadget and powerbank powered

I'm planning on using a pi 4B to act as a usb mass storage via a gadget module on the usb-c port. However, I want it to keep being powered when the usbc power is down, to finalise it's internal tasks. ...
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0answers
20 views

Strange issue with wifi (works only with hdmi)

I have set up wifi connection from GUI and raspi-config. In both cases after reboot rpi does not connect to wifi network. There is one strange thing. If I connect rpi to hdmi it suddenly connects to ...
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0answers
7 views

Take pic and store with multi cam adapter module

Im working with Raspberry PI4, two night vision camera modules and multi cam adapter module. I need to take pictures and store it on the desktop. How do I do that?
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0answers
65 views

uart2-5 Raspberry Pi 4

I am using an Raspberry Pi 4 os-ubutun-mate 20.04(focal) I am trying to to enable uart2 and uart3 on my Raspberry Pi 4. However, I'm not sure how to do this? I've read several articles and posts ...
0
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1answer
246 views

Pi 4: No Composite Video Out

I have a Pi 4 Model B Rev 1.2. I'm unable to get the composite video out to function. I think I have enabled the composite video out and set up NTSC 4:3 correctly by including the following in my ...
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0answers
26 views

How to recognise which button is pressed in ir remote using lirc raspberry pi?

begin remote name Samsung_BN59-01175B bits 16 flags SPACE_ENC|CONST_LENGTH eps 30 aeps 100 header 4676 4367 one 685 1557 zero ...
1
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1answer
73 views

Error 121: Remote I/O error in smbus.py call

I have four MCP23017's connected to a Rpi4 on i2c bus 1, and a HT12K33 on bus 2 which is on gpio pins 27 and 17. I made a chess board with the MCP's checking reed switches for open/closed, hence the ...
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0answers
65 views

ERROR for pi4: mmal_vc_component_enable: failed to enable component: ENOSPC

Please help as I'm going mad! im using 2 cameras on the multi cam adapter module on a raspberry pi 4. I followed the Arducam multi cam adapter module documentation. I have been getting this error ...
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0answers
30 views

Mount SMB share while being able to change owners

It's pretty hard for me to explain what I'm actually looking for. So I'll describe what I'm trying to achieve: I'm running Ubuntu 64 bit, docker with Traefik 1.7 and Portainer on my RPI 4 Now I'm ...
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0answers
116 views

RPi4 won't power on from 5V if any load is present on 3V3

The short version: Raspberry Pi 4B, rev 1.1, doesn't turn on when provided with 5V on the pins 2&4 if any load is present on the 3V3 (pins 1&17). However, powering the Pi from a USB-C source (...
1
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2answers
47 views

How to check if wiringPiSetup() was run

I am working on a C++ project using several objects that use wiringPi. When I initialize the objects each runs wiringPiSetup() in their constructor. If I test the objects individually all o them work. ...
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2answers
44 views

User getting removed from group after reboot

I am running Ubuntu Server 20.04.02 LTS in my RPi 4b. I ran into the problem that I couldn't access the GPIO without sudo/root with my python scripts so I changed the /dev/gpiomem group ownership to ...
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0answers
70 views

My rfid-rc522 reader stops reading after some time, how can I debug it?

I'm using the reader below to read mifare cards (13.56mhz), I have an electron/node.js application for this. For some reason after an uncertain amount of time(shortest time I noticed was about 30 ...
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0answers
49 views

RPI-4 Bluetooth board does not find iOS devices

On a brand new RPI-4, I cannot find apple iphones neither using module bluetooth nor bluez package. I tried to scan for BLE devices and all the command line tools such as bluetoothctl and hciconfig to ...
0
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1answer
35 views

Different SPI modes on one bus

I have two SPI slaves connected to one SPI bus on the raspberry. One uses SPI mode 1 the other uses SPI mode 3. In my C++ program I have two SPI_bus objects configured for each mode. If I now try to ...
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0answers
36 views

magnetic field generated by the engine alternator affects gpio value

I am working on a dashboard for a motorcycle. I created a Qt application on my raspberry pi 4 on a raspberry pi os lite. I have configured one of my GPIO as interrupt using the wiringPi library. ...
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0answers
24 views

RPi 4 as data storage accessible by "network not capable" device

I would like to ask you if there is any way how to achieve the behaviour mentioned below with RPi 4. If so, can you describe how or provide some links with solutions of this issue? Share a specific ...
0
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1answer
48 views

Ultrasonic Sensors and Raspberry pi 4

I was making a robot with a raspberry pi 4 which will have four ultrasonic sensors on all its four sides.. I was looking up in google to see the schematic of the connections and noticed that there are ...
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1answer
31 views

Raspberry Pi fails to connect to specific network by wifi/ethernet

I’ve been attempting to connect a Pi 4B 4Gb to a network on a Technicolor DGA4231 router in the latest Raspberry Pi OS. Flashed to a Micro SD card with no modifications at all. It seems to get an ...
0
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0answers
33 views

Pi4 MCP3008 - SPI port setup failed, no SPI available

I am trying to use a joystick with a MCP3008 in the middle (Connected to GPIO8 - SPI CS0) but I get following error: Exception in thread "main" java.lang.reflect.InvocationTargetException ...
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0answers
183 views

OpenBSD on Pi 4; will not boot from USB device

I am going by this tutorial. The Pi will not boot from the OpenBSD install USB. I will see it go through the pxe/http boot checks, and nothing USB related. Once it finishes, having not found anything ...

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