All Questions

0
votes
0answers
1 view

Input/output error using Python ADS1115, and a Raspberry Pi

I am trying to read an analog signal using ADS1115 and a raspberry pi. Sometimes it reads and some time result into error. Following is the code snippet response = {} adc = Adafruit_ADS1x15.ADS1115(...
3
votes
2answers
72 views

Choosing a Pi4 power supply

I'm trying to decide what is the best option for powering a Pi4. The specs mention for a minimum of 3A. Let's consider we would also like to connect a 2.5" drive to the Pi4. Could someone more ...
0
votes
1answer
1k views

save the serial data in text file raspbian

i want to save my serial data in text file ... how can i i do it ? i m using the following code: import serial import time port = serial.Serial("/dev/ttyAMA0", baudrate=600, timeout= 3.0) while ...
0
votes
0answers
5 views

Trying to connect vnc server from my Pi 3 but getting blank screen in vnc viewer

Hey I have setup the VNC server and running chrome there and want to see the same view here in my RaspberryPi3. But I am getting the blank screen. I have done the same setup in my laptop it is ...
1
vote
1answer
175 views

How to start a systemd service as a non-root user?

I've been using qbittorrent-nox on a headless Raspberry Pi 3 B+. The setup was a breeze. But then I wanted to autostart qbittorrent after boot, so I wrote a systemd service unit and enabled it. It ...
2
votes
0answers
21 views

Touchscreen calibration: touchscreen does not cover full display

I have purchased an industrial touchscreen monitor that supports Linux through PenMount drivers. The VGA video output (via HDMI adapter) works perfectly, and the USB touchscreen is perfectly ...
0
votes
1answer
95 views

Supply 5v to peripheral using solder pads and not GPIO?

This seems like a simple enough question but it hasn't been easy to find an answer! I have a Pi3 (with recommended PSU), official screen, official camera and I've now added the respeaker 2-mics Pi ...
0
votes
1answer
12 views

PWM in raspberry with L293D

maybe this ask is repeated but i need solve this special situation, i have an arm robot with 3 Freedon deegre, i want to control position of each motor with a raspberry pi 2 and L293D like a motor ...
0
votes
2answers
35 views

How to wire a Raspberry Pi to a 16 channel relay module? It won't work

A am using working on a project that requires a camera analyzing some images and activating the appropriate GPIOs to control a relay board. I currently have a touchscreen display, a Raspberry Pi Cam ...
1
vote
1answer
126 views

iw scan of a single channel appears to be broken

If you do sudo iwlist wlan0 scan freq 2412 or sudo iw wlan0 scan freq 2412 you will get a full scan and not a channel scan. I think there maybe a bug in the RPi implementation of iw. Has anyone had ...
0
votes
0answers
10 views

Execute Python-Script on MotionEyeOS

I've recently created a Card with MotionEyeOS for the Raspberry Pi. I've tested motioneyeos already on DietPi and the normal Raspbian, but it didnt worked with the original Raspberry Pi-Camera. In a ...
1
vote
1answer
228 views

Raspberry Pi Wi-Fi AP problem: no network and internet access on the Pi, though got them on Wi-Fi

I decided to use my Pi as a WiFi-AP, and followed the manual here: https://thepi.io/how-to-use-your-raspberry-pi-as-a-wireless-access-point/amp/ I did not setup a DHCP server though, because my ...
203
votes
5answers
816k views

How do I set up networking/WiFi/static IP address?

I have followed (any one of hundreds) tutorial, and it does not work. How do I set up networking/WiFi/static IP address on the Raspberry Pi? (This is a Dorothy Dixer to hopefully catch the hundreds ...
1
vote
2answers
41 views

Managing home lights - Controlling smart lights

My first project with my raspberry is how to control the home lights, all of them. What I want is to have the ability to turn on and off each individual light. I know using manual switches won't work, ...
0
votes
1answer
89 views

Transfer PSTN call to mobile over Wi-Fi?

I'm a newbie to Raspberry pi and I'm currently working on project and what I need is ,real time transfer analog call to mobile application over WiFi. So can someone suggest a way to accomplish my task?...
1
vote
3answers
243 views

I2C Addressing; Just SDA or both SDA and SCL

Without getting into the specifics of the project, I have a situation where I'm having to electronically add and remove devices from the I2C bus due to addressing concerns. If I can just isolate one ...
0
votes
2answers
317 views

Can't get MLX90640 working

Warning. Really long post. Hi. I’ve been having problems in getting my MLX90640 thermal camera to work on my Raspberry Pi Zero W. I’ve connected the camera to Pins 1,3,5,7,9 as instructed. I then ...
0
votes
0answers
15 views

Wearable motion capture suit

I am trying to find the simplest way to connect multiple 15 IMU sensors (ICM-20948) to a wearable suit.The thing is that they all have fixed addresses. The solutions I found so far are: Using a ...
2
votes
1answer
13 views

Bluetooth discoverable mode is automatically turned OFF

I want to set up the Bluetooth on boot so I can connect to it whenever I want with a device which is not trusted by the Raspberry Pi Bluetooth. I set up the Bluetooth on boot on my Raspberry Pi this ...
0
votes
1answer
62 views

Raspberry Pi + NRF24L01 timeout after a period of time

I am using a Raspberry Pi 2 with a NRF24L01 module... to communicate with several Arduinos. It is working very well ... until some point... after days or weeks. Then I get only timeouts. Not even a ...
0
votes
1answer
62 views

How can I correct errors when connecting android phone the pi with a usb cable?

I have pi B+ with a new install of rasbian today I am trying to connect my Samsung Galaxy Edge 6 with a usb cable. I have previously connected the phone to a linux pc using the same cable with no ...
0
votes
1answer
45 views

How to use java code to invoke info-beamer

Can i use java code to invoke info-beamer or is there any java API of info-beamer?
3
votes
5answers
767 views

Using Raspberry Pi to flash its own SD card

I'm developing a Buildroot OS for the Raspberry Pi, and my workflow requires very frequent re-flashing of the SD card to test new iterations. The process of removing the SD card from the Pi, flashing ...
0
votes
1answer
29 views

I think I fried my Raspberry Pi but I'm not sure?

I was making connections from my Raspberry Pi to a Relay Module. While I was running some sample code, I noticed that after I had terminated the program i was still getting a high CPU usage (around 60%...
2
votes
1answer
770 views

CWiiD doesn't detect wii remote but hcitool and blueman do

I have a raspberry pi 2 model B version 1 running raspbian that I am trying to get a Wii remote to work with. I have an Inateck Bluetooth 4.0 adapter plugged in to it and have CWiiD installed. When I ...
2
votes
1answer
2k views

Easy backups and snapshots of a running system with LVM

LVM (Logical Volume Manager) has some useful enhancements. You can make a snapshot, then check new programs and if they don't work as expected or you don't like them you can simply revert to your ...
1
vote
1answer
38 views

Using an additional WiFi dongle to create WAP and switch

I followed the answer to this question: Access point as WiFi router/repeater with additional WiFi-dongle To have my 3 B+ act as a WiFi hotspot where wlan1 connects to the internet (WAN) and the pi ...
1
vote
2answers
250 views

How to make ups hat run safe shutdown on raspberry when disconnected from the power source

It can be long discussion, because there is no single solution around this, so, to cut the story short, I will tell where I stuck on my way. It is AndroidAuto (media centre in car on raspi) project I'...
3
votes
1answer
686 views

Access point as WiFi router/repeater with additional WiFi-dongle

There are some tutorials to make an access point a WiFi repeater using only the on-board WiFi chip of a Raspberry Pi. But I want to use an additional USB/WiFi dongle as second interface for the up-...
1
vote
1answer
58 views

why does my raspberrypi 3B not able to reboot each time power is shut down?

I installed raspberian in my raspberrypi. It worked for the first time. But when I shut it down, it didn't reboot again. So, I had to format the sdcard and reinstall the raspberian again. And ...
0
votes
1answer
11 views

connection failed in apt-get upgrade

I am using Raspberry Pi 3 Model B, and installed raspbian-buster on it. sudo apt-get update works well. But sudo apt-get upgrade shows connection failed. Err:29 http://archive.raspberrypi.org/...
1
vote
0answers
14 views

How fast can GPIO pins toggle on the Pi 4?

Benchmarking of the Pi 4 using the Python GPIO Zero library shows a significant increase in the frequency of toggling a GPIO pin on and off compared to previous models. This result is contributed to ...
1
vote
0answers
17 views

Safe cut power supply from raspberry

I want to cut safe the power supply from the raspberry with a relay connected to the gpio. I know how to connect to relay to the board but.. When the relay turn off the power line will be cut off to ...
0
votes
1answer
100 views

I am on the search for a X2Go solution for RASPI

I am on the search for a X2Go solution for RASPI I have had a quick lookup here at: http://wiki.x2go.org/doku.php/wiki:repositories:debian and https://wiki.x2go.org/doku.php/wiki:development:build-...
1
vote
0answers
14 views

Method for piling three peripherals on one pi

I'm working on my first pi project, which is intended to use the following three peripherals: GPS -- using UART (pinout) eInk -- using SPI (pinout) battery power supply -- using I2C (pintout on p. 15 ...
0
votes
0answers
16 views

The docker repository does not have a release file

I'm trying to install Docker on a Raspberry Pi 3. I followed the instructions and ran: curl -fsSL https://get.docker.com -o get-docker.sh sudo sh get-docker.sh When I do this, I get the following ...
1
vote
1answer
52 views

net/http response encoding issues on Raspberry pi

Identical requests and headers to same server from two different platforms get as response two diferent encodings: From Win7 PC I get UTF-8 which is what I want. From Raspberry pi I get ASCII-8bit. ...
0
votes
0answers
30 views

New Pi Model 4 hangs at most boots

Greatings all Pi eaters! Got the latest Pi "Raspbian Buster full" on a 16 gig SD card but it hangs apx 50% of the time at boot right after log messages disappear. One monitor has a valid HDMI signal ...
0
votes
1answer
55 views

Remove device history wireless hotspot

I have been using Raspberry pi 3B as a wireless hotspot following this How to use your Raspberry Pi as a wireless access point. I think there is a limit to a number of devices that can be connected to ...
1
vote
2answers
71 views

Scheme Programming Language Support with Manjaro Arm?

I am trying out Manjaro Arm on my Raspberry Pi 3, but surprisingly find only Guile as the only viable Scheme interpreter/REPL. I have tried the following: Racket, and Mit-Scheme not found by pacman ...
3
votes
1answer
52 views

Cost-effectiveness of Pi cluster

Does it make sense to use Pi cluster for real computation? My use case is to carry out intensive computation tasks 24/7. The tasks are pleasantly parallel, and there will be minimum inter-node ...
0
votes
0answers
12 views

Trouble installing Tensorflow for raspberry Pi [on hold]

So I'm following https://www.tensorflow.org/install/source_rpi to install tensorflow on the raspberry Pi. However when I get to cross compiling the code using the command provided by them I get the ...
0
votes
1answer
66 views

Can't always access my Raspberry Pi through PuTTY (SSH)

I recently bought a Raspberry Pi 3 Model B and started to set it up. I followed some tutorials and finally was able to access it remotely without having to plug it to a monitor, a keyboard, a mouse... ...
0
votes
2answers
85 views

How to find available space and free space if low [on hold]

I need to programmatically be able to see how much space is left on the SD card and if it is low delete some files. I'm not sure how to go about getting the value of the SD card space and then saving ...
1
vote
0answers
12 views

Mini UART Bluetooth PAN on Pi Zero W

I followed these instructions to enable a Bluetooth PAN on my Raspberry Pi Zero W. It mostly works fine, but it occupies a serial port. I need UART (mounted at /dev/ttyAMA0) for serial communications, ...
1
vote
1answer
16 views

Pausing code execution till a button is pressed

I'm trying to pause code execution till a button is pressed and this is what I came up with. I have not tested this but can anyone tell me if this is the right way to go about it? Button 'pressed' is ...
2
votes
1answer
13 views

C++ problem: boost/asio.hpp non existing

I'm using Raspberry Pi 3B+. I'm trying to compile a rather massive C++ package given to me from somewhere else. However make fails compiling. It cannot find boost/asio.hpp. I simplified the problem ...
2
votes
1answer
167 views

Calibrating ESC with PCA9685

I'm currently working on a RPi project to control an RC car via my phone, and I am having difficulty setting up my ESC. Based on research I have done online, I need to first calibrate the ESC by ...
-1
votes
0answers
10 views

Wifi connection problems

Nothing for the raspberry pi is working for me or my friends. I tried to hook up to my hot spot on my phone and entered the CORRECT password but it said "invalid argument." So I'm mad but still using ...
0
votes
1answer
15 views

Can I download Raspbian update packages on a Redhat Linux Server?

I have a Redhat Linux Server that I'm running and I'm trying to create a update repository for Raspberry Pis, is it possible to download the update packages to my Redhat server, and if so, how?

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