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62 views

Xorg not working after upgrading to buster

After switching to Raspbian Buster and rebooting RPi3 B+ boots into a shell. (I use the GUI so this is a bit odd) After typing in startx I get this error (I cutout a bunch of junk): (EE) no screens ...
0
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3answers
43 views

Automatically Connecting to Raspberry Pi 0 to a wifi without Screen and SSH

I have a raspberry pi 0, but don't have/don't want to connect to a screen/hdmi/SSH. I can plug my pi's sdcard into my laptop and access the raspbian installation files, so is there a way I can ...
0
votes
1answer
66 views

Can I plug my SD card from Pi 3 into a Pi 4?

If I upgrade the OS to buster on an OS disk (SD card or USB stick) on my pi 3, will it work if I boot a pi 4 off that?
1
vote
2answers
72 views

How to read Wiegand serial data? (Rx/Tx)

Ok, I am losing my mind... Why is this so damn difficult? Current situation: - 12V Access control device that is connected like this i.e. Wiegand D0 to Tx and D1 to Rx, with voltage dividers. - ...
0
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0answers
24 views

gpsd/gpsmon on R-Pi 3 re-activates disabled NMEA messages?

I have a Raspberry Pi 3 with Adafruit's Ultimate GPS Pi Hat. I was able to successfully install gpsd and chrony. I am now getting NMEA and PPS thumbs up But I have a weird issue. The Ultimate GPS ...
1
vote
0answers
22 views

picamera error the second time I run camera.capture(output,'yuv')

I'm getting an error the second time I run camera.capture(output,'yuv'), what am I doing wrong? my code: from time import sleep from picamera import PiCamera from picamera.array import PiYUVArray ...
1
vote
2answers
54 views

Read ip camera stream video on python using opencv3

I installed opencv3 installation link on my raspberrypi 3 and i've tested this, everything is ok, but when i try to read the ipcamera video stream encountered this error self.stream = cv2....
2
votes
0answers
44 views

Raspberry Pi 3 model B wifi monitor mode

Q. Has anyone managed to configure a raspberry-pi 3 b for monitor-mode? I have an external (Edimax) WiFi USB dongle also, which works with my PC in monitor mode but does not work with the raspberry ...
1
vote
1answer
25 views

Connect 2 SHT25 to measure 2 sets of temperature and humidity at 2 different sites

I want to connect 2 SHT25 to measure 2 sets of temperature and humidity at 2 different sites . How should I connect it to Raspberry Pi 3. Thanks for your help
0
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0answers
17 views

is there a way to minimise the effect of the Pi on the Sense HAT's temperature sensor?

Is there a way to minimise the effect of the Pi on the Sense HAT's temperature sensor? I cannot seem to reduce it from mid to high 30s deg. C. Or do I really need a sensor that is external to the ...
0
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0answers
17 views

Maximizing the number of active BLE/Bluetooth connections

I would like to connect around 30 smartphones via BLE to a Raspberry PI enabled system, however, googling around showed that it supports up to 5-7 active connections only. It is expected these 30 ...
2
votes
1answer
142 views

Is the Raspberry Pi 4 vulnerable to the Spectre exploits?

Now the new Raspberry 4 has moved to ARM A72 cores, it's vulnerable to the spectre issues according to ARM. Processor Variant 1 Variant 2 Variant 3 Variant 3a Variant 4 Cortex-A72 Yes Yes**...
0
votes
1answer
29 views

Having a sound clip play and be looped as long as the button is pressed down and stops as soon as it is released

I am able to have the script running when I have the code set to pygame.mixer.music.play but if I do pygame.mixer.music.play(loops=-1) I get an error stating CallbackSetToNone: The ...
0
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0answers
16 views

How can I custom set my 7'' touch screen to the resolution of my preference (custom)

I have an LCD Display that is 7" but I want to set the resolution to 1024x600 but I can find a way how
0
votes
0answers
21 views

keeps showing “^@” repeatedly

I boot just fine but when it is ready for login it repeatedly shows "^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@..." forever. Please help me fix this. Thanks!
2
votes
1answer
31 views

wpa_supplicant + dnsmasq: Fallback to AP mode if no wifi connection

I'm trying to figure out how to configure wpa_supplicant to: First try to connect to a selection of preconfigured wifi networks as a DHCP client, and if that fails Set up a wifi access point using ...
0
votes
0answers
12 views

How to get my font to work

I just downloaded a font and it's a .ttf file but it isn't working, I was hoping someone could help me figure out what's wrong. Thank you!
1
vote
1answer
19 views

is the Raspbian NTFS implementation journaled?

I read somewhere that Raspbian NTFS implementation is not journaled, but I didn't find confirmation that it is true. If it is true there is a way to have it journaled? I'm using it on a USB stick ...
0
votes
1answer
26 views

DS3231 doesn't update its internal time?

UPD: with another chip of the same model RTC works just fine, presumably that the chip was broken/damaged. I installed DS3231 RTC clock ( which is detected as DS1307 for some reason). My config.txt ...
0
votes
1answer
50 views

SSH into Raspberry Pi connected to OpenVPN

I want to be able to remotely ssh into my rpi, while my rpi is connected to PIA (via OpenVPN). I can ssh into the pi from my local network while the pi is connected to OpenVPN, and I can also ssh into ...
1
vote
0answers
25 views

install eclipse luna on raspberry pi 3

I'm new here and I want to ask if there is any way to install eclipse luna or higher on raspberry pi. I'm using Rasbian and the already installed Eclipse (3.8) sudo apt install eclipse doesn't ...
0
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0answers
34 views

What came out of the team up with Google AI for the rpi 4?

I remember back in 2017 I had read several blog articles such as this one where it was mentioned that the rpi foundation had teamed up with Google and that we could expect Google AI for the raspberry ...
0
votes
2answers
48 views

No activity LED after shorting a GPIO to ground : dead or fixable?

This is a model 3B+, due to some under-power warnings on the screen I was testing the actual voltage between the 5V and ground pins on the header, but managed to touch pin 40 (SCLK) to pin 39 (GND) ...
0
votes
2answers
65 views

What happens to the GPIO voltage after shutdown?

I don't have a Raspberry Pi laying around at the moment and I would like to detect if my Raspberry Pi is shuted down. My Idea is that maybe after the Pi shutted down the Voltage at the 3V3 pin will ...
0
votes
0answers
18 views

Appearance Settings - Set Defaults, changes what?

In Raspbian, in 'Preferences > Appearance Settings > Defaults', there are buttons to set defaults for small, medium and large screens. Can anyone tell me what specific settings they actually change? ...
0
votes
0answers
23 views

Run PostgREST on armv6

I'd like to run PostgREST on an armv6 raspberry pi. unfortunately, that's not officially supported. best I could find is an armv7 binary (unofficial), and generic instructions for cross-compiling – ...
0
votes
1answer
46 views

“Proper” way to (permanently) mount USB hard drive?

What is the proper/best way to have a USB hard drive permanently mounted? I have done this using fstab using disk label as the identifier, but when I disconnected the drive and tried to boot the pi, ...
1
vote
0answers
19 views

Is There Support for 8-bit/4-bit parallel i/o bus (8080 or 6800) for LCD drivers?

I'm looking at using a 240x128 LCD with a UC1608 chip. Are there any packages that support parallel i/o with it? The UC1608 has support industry standard 3-wire, 4-wire serial bus (S9, S8, S8uc) and ...
1
vote
2answers
44 views

Pi 3 Model B+ has steady red PWR LED but no green ACT LED with 2018-03-13-raspbian-stretch.img

Pi 3 Model B+ has steady red PWR LED but no green ACT LED with 2018-03-13-raspbian-stretch.img. See screenshot below. I'm not sure if the side of the ACT light is red and if so if that's also a ...
0
votes
2answers
452 views

USB Powerbank for Raspberry Pi 4

Is it yet feasible to use a USB powerbank to power the Raspberry Pi 4B? Are there any that you've successfully tried and could recommend? Can a 2.4A USB-C bank work?
0
votes
1answer
21 views

Raspberry Pi can't print to wireless printer

I can print to my wireless printer from my laptop just fine, but I'm having trouble getting it to work from my Raspberry Pi. I found some instructions that said to install cups-client, then edit the ...
-1
votes
0answers
106 views

Stadia running on Raspberry Pi 4

I'm wondering if Google Stadia would run on a Raspberry Pi 4. It seems to run on Google Chrome that doesn't seem available on Raspbian. However, Chromium is available. So I have two questions: Does ...
1
vote
1answer
24 views

Programming MLX90640 to display what I want

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 ...
0
votes
0answers
86 views

Raspberry Pi 4 - Not booting custom kernel

I am running the latest Raspbian build (Buster). I have compiled a kernel with audit/apparmor support and am trying to boot my Raspberry Pi 4 from it. The kernel is compiled from the latest branch ...
2
votes
0answers
202 views

Can't set output to 4k 60hz on Pi 4

What I've tried: Setting "4Kp60 HDMI" I did this in the GUI config application and rebooted. Also tried disabling it and then enabling it in the config.txt and rebooted. Installing updates My ...
2
votes
1answer
18 views

CE1 not going low for pigpio.spi_open() with flags

I'm attempting to modify joan's test script (https://raspberrypi.stackexchange.com/a/44320/42126) for an RPi SPI master to communicate with an Atmega328P slave. I cannot change which GPIO pins I have ...
1
vote
0answers
12 views

USB Serial Set Up (Magnetic Card Reader)

I recently bought a USB magnetic card reader (MSR 100) I'm not sure how much documentation is out there, but I've found that it works serial over USB. However, I'm having some trouble setting it up on ...
2
votes
1answer
87 views

What Revision(s) does cat /proc/cpuinfo return on the new Pi 4 1/2/4GB?

To enhance my bash script decoding the Revision returned by cat /proc/cpuinfo I'd like to know what the RaspBerry Pi 4 codes for ModelName,Processor and Memory are. (my own one is still underway) ...
1
vote
0answers
26 views

LCD NOKIA 5110 how to change only part of text/lines

I don't known if it's specially a raspberry oriented question, but it is related to my raspberry project then ... My question is in the title, how to refresh a certain part of the NOKIA 5110 screen ? ...
0
votes
1answer
94 views

Rpi4 - double HDMI functionality

What is the rational ( or what are the advantages ) of having a double HDMI port on the Raspberri Pi 4. Since the Pi is new, I did not find any info around and still did not tested myself- but What ...
0
votes
0answers
31 views

Piwigo on nextcloudpi

Piwigo installation on a “fresh” nextcloudpi device fails. The installation follows this documentation. Main problem is, that when I request the address https://radius.ddnss.de/piwigo the webserver ...
0
votes
1answer
40 views

SSH to raspberry pi over internet

I want to ssh to my Raspberry pi that will be on a different network from my home network. ON my home network router, I set up port forwarding: Set the WAN and LAN start and end ports to 22, set the ...
-1
votes
1answer
21 views

Disable autologin on tty1 on stretch 9.9

I found this answere but it doesnt work anymore. How does it work on the new version?
4
votes
1answer
403 views

OTP - Disadvantages of USB boot

TL;DR; What are the real-world disadvantages of setting the OTP on Pi3B for USB boot. A bit longer : As we know the Pi3B+ is pre-configured for enabling USB boot, but The Pi3B needs one-time ...
1
vote
0answers
14 views

How to fix XRDP Problems with Raspberry Pi and Windows 7

I just updated my Raspbian to the latest distro and fixed a problem with sudo apt-get update not working. The issue I'm having now is that my Remote Desktop isn't working anymore, which happened after ...
2
votes
0answers
16 views

Dual Camera Issue

I recently set up my raspberry pi to run as a home security camera. I am using a pi NoIR camera module and the raspi cam web interface software. It works perfectly, however I am simultaneously ...
0
votes
1answer
68 views

Setting Up A Raspberry Pi As A Wi-Fi Router

I want to set up a Raspberry Pi 3B as a Wi-Fi router/hostpot. Is there is a quick and easy way to do it without compromising network security? I love the thought of making it into a router because the ...
0
votes
0answers
21 views

Using the MCP7940N RTC with the Pi 3B+

I have a breakout board with the MCP7940N RTC on the Pi 3B+. How do I get this to work. I've been following this guide but don't seem to be getting anywhere. In my /boot/config.txt I have added ...
1
vote
0answers
18 views

CEC-Client Turns TV Off, but Not On Again

I'm using the cec-utils shell commands to turn my tv on and off via RPi. echo 'on 0' | cec-client -s -d 1 echo 'standby 0' | cec-client -s -d 1 The standby/off command works fine, but the on ...
0
votes
0answers
61 views

Should I buy a pi zero with my Pi 4 4GB

I am buying a raspberry pi 4B with 4GB of ram and I was wondering what the connectivity between raspberry pi 4 and Pi Zero is like? Do they communicate well? and what software do you suggest? Is ...

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