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16 views

X Error of failed request: BadAlloc (insufficient resources for operation)

I'm running a GUI programming (Tkinter) based application program for reverse vending Machine on raspberry pi with raspbian 8 jessie OS. The program takes user input as language selection, mobile ...
0
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2answers
58 views

Using a raspberry pi to control a model of the USS Nimitz, and possibly using an arduino to read PWM for the pi

I want to create a python equivalent of the RCPulseIn library for arduino that does all the same functions of the library. I have written up a code that has lots of errors, but has sort of a framework ...
0
votes
1answer
50 views

Old IP keeps coming back

I got a new router, and my raspberry pi keeps adding the old IP to my system everyday. I have tried assigning a static ip, flushing the interface, making sure that the old ip is in none of the files, ...
0
votes
1answer
41 views

Configuration UART on pi 4

I am trying to configure the UART on the Pi 4. I have entered enable_uart=1 into /boot/config.txt and I have sudo systemctl disable serial-getty@ttyS0.service and removed console=serial0,115200 ...
1
vote
1answer
17 views

Dash/Plotly webserver not working on raspberry Pi, working on mac

I am trying to chart real time data from a Raspberry Pi to a web server. In this case I am using dash (https://dash.plot.ly/live-updates) to do this. I am currently testing my dash web browser on ...
0
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0answers
21 views

New to Pi I need to connect a device via serial communication, how do I teach myself?

I've been asked to connect and control a finger-sensing device to a Raspberry PI. There is a protocol to respect called OSDP. It supposes a serial connection on top of RS485. I'm a seasoned C/C++ ...
0
votes
1answer
25 views

Login screen stuck in a loop

I have tried several ideas such as: chown pi:pi .Xauthority choxn -R pi /home/pi and I have deleted .Xauthority But my pi keeps returning to the Shut-Down / Log-In screen no matter what I do. I ...
1
vote
1answer
28 views

Raspberry discoverable and pairable without pin keep disconnecting

I want to send bytes to my raspberry pi 3 through bluetooth with an application on my smartphone. Bluetoothctl works fine, pairable, discoverable, agent NoInputNoOutput all work. However, my phone ...
0
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0answers
16 views

Raspberry Pi 7" Display White Screen

Good evening all. I have been working on a project involving the official Raspberry Pi 7" touch screen display and now it has spontaneously failed and will only display a white screen. I have ...
0
votes
1answer
25 views

Headless RP 4 setup for Mac; getting “mkstemp: No such file or directory found”

I'm brand new to Raspberry Pi. I bought a RP 4 kit from Amazon with the goal of creating a NAS Box to access external hard drive files over my Wifi. I have a MacBook Pro, running Mojave 10.14.6 Steps ...
1
vote
1answer
29 views

PIGPIO problem with delay on scripts

I am trying to run an old Raspberry Pi 2011.12 as a server to control a RGB LED strip. To this I am using PIGPIO since this is the best solution (RPi.GPIO is software based, which creates flickering). ...
0
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0answers
48 views

Waveshare SIM7600E-H no wwan0 interface when connected to Raspberry Pi 4 model B

I have connected the new Raspberry Pi 4 model b with the waveshare SIM7600E-H 4G HAT. The os is Raspbian Buster Lite. The configuration I use is the following: 1) The jumpers are placed in the middle ...
0
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0answers
34 views

Unable to format SD card after using it for Raspbian

I have a Raspberry Pi 3B+ that I want to make a little home server out of. I decided to start with the current raspbian build, which as of writing was the one released 2019-09-26. I used Balena ...
2
votes
1answer
30 views

How to bridge wlan0 to eth0 without a static ip?

I'm having internet issues in my dorm and I can solve them by bridging the dorm's WiFi (wlan0) to ethernet (eth0). I've read a lot of tutorials online, but most of them are outdated or not applicable ...
0
votes
2answers
67 views

Can i install old raspbian images on raspberry pi 4

I want to buy a raspberry-pi 4 and for some reasons i need to install an old linux kernel on it (for example raspbian with linux kernel 4.14) I want to know that can i install old raspbian images on ...
0
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0answers
26 views

raspberry pi 4 doesn't boot [duplicate]

I have a raspberry pi 4 which was working and suddenly turned off and ever since isn't booting up. Red and Greeen LED is continously on.(Not blinking) I have tried another memory card with differnt OS ...
1
vote
2answers
49 views

Local network between 2 RPIs over GPIO

I’m planning a project where a RPI zero will be controlling a flying vehicle. It’s going to have 2 (maybe 3) cameras as an input. These will be connected over USB. I’m aware that processing the ...
0
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0answers
20 views

Green light always on after a while for Raspberry pi 3 Model B V 1.2 2015

I boot the raspberry pi correctly, the red light is on (solid light) and the green light blinks. After a while, (it can be few hours or a couple of days) the green light stays solid and it does not ...
1
vote
1answer
48 views

Begineers - I need dual Wifi on Raspberry 3b

I describe the situation which i need help. I have installed raspbian with RASPAP. I need from my raspberry to deliver 2 wifi ssid: Work, not DHCP, transmit the ethernet on wifi for workers.192.168....
2
votes
1answer
38 views

How to connect EEPROM to Raspberry Pi 3?

I was wondering on how to connect an EEPROM chip to the Raspberry Pi 3? And any suggestions on which EEPROM chip model is best to use with RPi3?
0
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0answers
26 views

Power on Rpi 3B+ from shutdown with only GPIO SCL (weird)

I was searching for ways to power on my rpi from shutdown (o halt) mode, then I noticed somewhere else that shorting SCL and GND will turn on... Well in fact, I tried this and my RPI turned on ONLY ...
1
vote
1answer
44 views

Rpi4B can control either one of two L298N modules, each driving two motors, but not both modules at the same time, why?

I'm using a pi 4 for a rover I want to build and I have 2 L298N drivers. I connected them using a breadboard to my pi so I don't need that much GPIO pins but only one pair of motors is working and ...
0
votes
2answers
35 views

txd and rxd pins with same numbers at the end of name

So I was looking at alternate functions of the GPIO pins of the Raspberry Pi 3b+ and found that some GPIO pins do support txd and rxd alternate functions. However some are named txd0/rxd0 and some are ...
2
votes
1answer
32 views

Unable to set GPIO even as root

$ echo "1" > /sys/class/gpio/gpio17/value echo: write error: Operation not permitted Doing sudo -i to log in as root ends up the same. $ ls -ll /sys/class/gpio/gpio17/ -rwxrwx--- 1 root gpio 4096 ...
0
votes
2answers
38 views

using GPIO pins as TX/RX pins

I'm working on a project that needs multiple TX/RX pins, but the Raspberry Pi that I have only has 1 of these pins. Can I use the GPIO pins as TX/RX pins? Or is there an adapter available somewhere? ...
0
votes
0answers
25 views

Audio Output for RPi 3 Mobel+

Very simple question. If I do this: Navigate to your screen. Select "Manage Screen". Select "Advanced". Set "Audio Output" to "3.5mm jack". Press "Save". Would I be able to listen to music via USB ...
0
votes
0answers
16 views

Gstreamer decoding slow with omx

I am using Gstreamer python binding to play videos on RPI 3 B+. When compared to OMXplayer, Gstreamer is performing poorly. This is my current pipeline : gst-launch-1.0 filesrc location=test.mp4 ! ...
1
vote
1answer
46 views

upgrade B+ to python 3.7

I have a B+ running rasp stretch and I am attempting to follow this tutorial to upgrade to 3.7 but I have an issue at the this step: ./configure –prefix=/usr/local/opt/python-3.7.0 make -j 4 Any ...
0
votes
2answers
51 views

Rpi GPIO pins + 2N2222 to independently drive two DC12V fans

I'm pretty new to Pi and electronics. I need to use my Pi as fans controller. I got two 12V fans and need to control it from Pi. I want to use external power supply (12V) to give them propper power. ...
-1
votes
3answers
42 views

Running RPi 3B without a fan or radiator [duplicate]

I am using my RPi 3B purely for feeding data Flightradar24 (with Pi24 installed instead of pure Raspbian). I assume that usage of electronics and overall load of the device is rather low. My ...
0
votes
1answer
34 views

Measuring temperature by attaching thermocouple directly to the processor

I know that I can read RPi temperature through console, but I'd like to measure it using a standard, hardware thermometer. Is this possible? Can I attach thermocouple directly to the RPi's processor ...
-1
votes
0answers
30 views

Network doesn't work properly after interface and wpa_supplicant restart

So, I am using an RPi 3 B+ on Stretch. Networking is done through /etc/network/interfaces and systemd's networking.service. The thing is, I am trying to write a script that restarts the wireless ...
0
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0answers
40 views

Why the script hang for 2 days?

I am running a python script to check the internet connection of a wifi network. It is being run for every 10minutes. Afwer a one month of working, the scheduler is not invoking the actual function ...
0
votes
0answers
20 views

More efficient web video stream on Rasberry Pi

I am a surfer/kitesurfer and i live in the UAE. I'm trying to build a basic weather station that can provide wind and webcam details for a spot that is in a remote location. I am using a pi4 1GB and i ...
0
votes
0answers
24 views

Could my Pi have damaged my display?

I am using this display with my Pis. Thanks to a tutorial they put some time ago, I have been able to control the brightness on the screen. Recently, I was testing some nodes on the Pi using a ...
0
votes
0answers
17 views

I want to stream my PC's audio to a smart lightbulb color changing for muh RGB [on hold]

Background: I've tried various smart bulbs and I think my only option is to buy a phillips hue color changing light bulb, connect to a phillips hue hub, connect hub to raspberry Pi and have Pi ...
1
vote
1answer
16 views

How to install previous/older version of octave in buster?

Currently Octave version 4.4.1 is available. It always crashes while start. I am trying to install an older version of octave but I can not find any older packages in the repo and the sources are ...
0
votes
0answers
19 views

How to create a real time link between Raspberry pi3 and Android app to see sensor info?

I built an App (android) and a little Car (Raspberry Pi 3 b+). The app is a remote control and I put a proximity sensor to the Raspberry (little car). How can i do to get that info in real time in ...
1
vote
2answers
25 views

How can I install numpy on a headless REMOTE Raspberry Pi Zero?

I need to install numpy on a remote Raspberry Pi Zero. I know how to do it on a local machine, but my Zero has already been deployed as a surveillance camera running MotioneyeOS. I can SSH to the Zero ...
0
votes
0answers
32 views

Phoniebox.de - No audio issues due to snd_usb_audio file missing

RPi Model 3 B+ Used this to install the stretch https://downloads.raspberrypi.org/raspbian/images/raspbian-2018-03-14/2018-03-13-raspbian-stretch.zip as recommended on here https://github.com/...
0
votes
0answers
28 views

VLC stream RTSP USB webcam

I'm trying to stream a usb camera using VLC. I used this page to get it working on a pi zero with a raspberry pi camera attached to it. On a second RPI 3B+ I'd like to do the same only with a USB ...
0
votes
0answers
22 views

XFCE4 themes not working correctly in raspbian buster

I've installed XFCE4 because I like it more than LXDE and the RPI 4 can easily handle it (for comparison, my laptop has a worse CPUmark and less RAM...) and I've installed the mint X dark theme (...
0
votes
1answer
19 views

Switch back from WLAN AccessPoint to normal WLAN client

I configured my Raspi (3B+, Raspbian Stretch) as a WLAN Access Point, as described here: https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md Now I want to switch my Raspi ...
0
votes
1answer
26 views

Toslink input for Raspberry Pi

I am looking for optical Toslink input for Raspberry pi (any model). If I just connect a DLR-1140 receiver to PCM_DIN, would that work? My goal is to build a sound server. I have a TV that outputs ...
1
vote
1answer
46 views

Setting Pull Up/Pull Down mode doesn't work (mostly)

I can't seem to set the pull-up resistor mode on the PI4 with most methods I try. I have tried: C# (the new System.Device.Gpio interface), WiringPi (using a C# abstraction), and wiringPi command line ...
0
votes
1answer
14 views

converting YUV to RGB change colour to green

I need to save picture without losing any data. Using PNG is not an option as it takes more than 5 seconds to save and this is too slow for my project. I used campera.capture('image01.data','yuv') as ...
0
votes
0answers
23 views

Unable to access laptop's internet on Pi Zero over Usb

I've been going over so many web pages trying out numerous things for the past 6 hours to just get internet on my rpi to no avail hence I have come here to hopefully find a solution. Below are the ...
0
votes
1answer
51 views

How to physically wire two I2C sensors' SCL/SDA signals to a single I2C bus?

I need to connect two sensors like this https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcRDDlL2AK_eYo9BKbImJcekMZ0PgIYC2GL0OLIMVGzkWAtq54zG to rpi 3 b. I found that it is not a problem and ...
0
votes
0answers
15 views

Using RPi to provide powered networking to USB-connected devices?

It's possible to charge and provide wired networking to an iPhone via a special dongle. The USB ports on an RPi3 can deliver power to a USB-attached iPhone; is it possible to also provide network via ...
0
votes
1answer
38 views

Is it possible to log any discoverable Bluetooth/BLE via headless pi?

Has anyone built a bluetooth/BLE sniffer that runs headless and logs MAC addresses of all discoverable BT/BLE devices? What resources did you use? I've found a tutorial on Adafruit, https://learn....

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