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Questions tagged [pi-3]

For questions that apply specifically to the Raspberry Pi 3 and not other/all models.

1
vote
1answer
65 views

Weird output on python IDE terminal

I am trying to get my Pi 3 communicated with arduino but am getting output which i can't understand. My arduino code: char dataString[50] = {0}; int a =0; void setup() { Serial.begin(9600); ...
0
votes
1answer
381 views

How to start and stop python script using button

I've written some python code that should start and stop another python script (Datalogger) when a button is pressed. So when the Pi is booted up I'm wanting the button script to run and then once I ...
0
votes
1answer
42 views

Raspberry Pi3 Stretch unable to ssh after a short period of time

My RP connects via WiFi and I am able to ssh successfully. But if I close my terminal and try and reconnect to the pi after a short period it gives me a connection refused error. This wouldn't be an ...
1
vote
0answers
96 views

How can I pause a video of omxplayer with out using keyboard?

I am working on my project that can display video when a magnet (signal ) is detected using a hall-effect sensor. Then after, if the magnet is removed from the sensor the video has to pause (not to ...
5
votes
1answer
599 views

What are the differences between the the models 3B+ and the new 3A+?

The Raspberrypi Foundation just announced: New product: Raspberry Pi 3 Model A+ ... releasing the Pi 3 A+ as [...] one of our most frequently requested “missing” products. By the way, the ...
0
votes
1answer
29 views

Command from terminal and script on startup

Is it possible to run a python script as well as a command from terminal on startup? I have successfully executed the python script as mentioned in the link below. https://www.instructables.com/id/...
0
votes
1answer
29 views

Trouble getting picam to take a photo on boot (init..d method)

I want the camera on my pi (Rpi 3B+) to take a picture every time it boots up. I've read through several other questions of people trying to do similar things, but I haven't ever found the script that ...
0
votes
1answer
52 views

I don't know whether I have fried the I2C port on the Raspberry Pi 3 B

I am using a Raspberry Pi to send data to an Arduino Nano using I2C and it was working fine by just connecting the SDA, SCL and GND pins together from the Pi and the arduino. I then tried to get ...
1
vote
0answers
116 views

How do I pause a python program and then wait if no signal is received to a GPIO pin?

I'm developing a datalogger using a Raspberry Pi 3B+. I have 2 separate square wave signals connected to two separate GPIO pins and some code to record and store the date and time of each transition ...
0
votes
1answer
29 views

Raspberry Pi OS Double Window Icon (How to remove?)

I just got a Raspberry Pi, and installed the OS. I was fiddling with the task-bar when accidentally I made 2 identical windows (showed only on the task-bar) for each app that was opened. I've been ...
1
vote
3answers
476 views

Connecting to RPi from Linux with the ethernet cable without touching RPi

I have a Raspberry Pi 3 that runs on Raspbian and has SSH enabled. However, I don't have any monitor to connect it to (to set up WiFi connection), so my only chance to communicate with it is a basic ...
2
votes
2answers
254 views

How to stop python script that was started with crontab reboot

I have a python script that continuously saves data to a CSV file and is started as soon as the Pi starts up using crontab reboot. Does anyone know how I stop the script from within the Raspberry Pi ...
0
votes
1answer
70 views

Raspberry WiFi hotspot, no ethernet

There is a ton of tutorials on how to make your Pi a hotspot router, but all of them are using ethernet as the "income". What I would like to achieve is to connect to WiFi with my USB WiFi adapter and ...
0
votes
1answer
111 views

How can I debug why SFTP is not working while SSH is working?

I have an arcade run on raspberry pi 3 flashed with RetroPie 4.4. I already enabled SSH capability via raspi-config menu Test I can SSH into my Pi perfectly fine, but I can not SFTP into it. ...
0
votes
1answer
154 views

How do I prevent Pi prompt for username and password ? [duplicate]

I have an arcade run on raspberry pi 3 flashed with RetroPie 4.4. Just now, I'm not sure what had happened to my Pi hardware, network, or even SD card when I boot, I kept getting prompt to enter the ...
1
vote
1answer
67 views

Use a raspberry pi as a GPU for another raspberry pi

I have 2 Pis, a original B+ and a 3. The B+ was used every day as a desktop PC for 4 years with overclocking, so it is pretty worn.So now I use the 3 as a desktop and try to run DOS games in DOSbox on ...
0
votes
1answer
47 views

Pi 3 and SainSmart 8 channel SSR - Not able to turn on all 8 relays

Pi 3 and SainSmart 8 channel SSR - Not able to turn on all 8 relays Environment: Raspberry Pi 3 OS: Raspian Language: Python3 and Java/Pi4J Control: SainSmart 8 channel Solid State Relay Issue: ...
0
votes
2answers
282 views

Using a static IP for ethernet and DHCP for Wlan using dhcpcd

How would I be able to use my rPi with a fixed IP on the ethernet port and 'automatic' wifi? I've got the credentials for the known accesspoints, with priority stored in /etc/wpa_supplicant/...
0
votes
0answers
26 views

my 3.5" touch screen inverts the input of the touch

when ever i touch the top right of the screen and move to the bottom right the mouse moves from the top left to the top right i've already tried "display_rotate=2" and "lcd_rotate=2" but nothing ...
0
votes
1answer
263 views

How to connect GSM module to Raspberry PI3 and also using Bluetooth of Raspberry PI3

I want to use Bluetooth of Raspberry Pi3 and also I want to Connect GSM module sim800l to Raspberry Pi3 ,in this instruction Bluetooth will be disable , what is the the best way to use both of them? ...
3
votes
1answer
826 views

Fedora 29 on 3B - headless install

I'd like to try the new Fedora 29 on Raspberry 3B. Can you run the installation headless via ethernet or wifi? Doku says Make sure you have a keyboard, mouse, network cable and monitor connected., ...
0
votes
1answer
31 views

How do I stop CSV file being overwritten when rebooting Raspberry Pi 3B+

I have some code (shown below) which turns the Raspberry Pi into a datalogger. I use GPIO.add_event_detect to detect the date and time that a square wave signal changes state. This data is then saved ...
1
vote
0answers
87 views

Real Time Image Recognition at Low Resolution

Working on an embedded systems project. I’ve purchased a FLIR style thermal camera off an older cadillac. It outputs grayscale video at 320x240 (NTSC). Ultimately, I’d like to add night vision with ...
0
votes
1answer
36 views

Parallel compilation linux real time kernel

Within the framework of a lab I had to compile a kernel using several commands such as: make zImage j-8 make modules j-8 make dtbs j-8 j-8 means I used parallel compilation but I am asked this ...
0
votes
1answer
28 views

How to make center point radius

I have a project idea that has the same concept as the USA house arrest device. But my project is for tracking children. My idea is to place a wearable device on the child that will communicate with ...
-1
votes
1answer
82 views

RPI as server for home automation

I would like to ask for an advice in choosing controller/platform for my project. Basically what I want to do is RPI local server with web server, where I can display data from arduino sensors and ...
0
votes
1answer
58 views

Installing library to raspberry pi problems

I'm trying to install a library to my RPi 3 B, but for some reason when I try to import it in my script, it won't recognize the library. This is the library: https://github.com/widgetlords/...
0
votes
1answer
612 views

RuntimeError: Failed to add edge detection. GPIO.BOTH Raspberry Pi datalogger

I am coding a datalogger using a Raspberry Pi and am starting to test my code but now keep getting an error saying 'RuntimeError: Failed to add edge detection'. Here is my code: import RPi.GPIO as ...
0
votes
1answer
70 views

Can’t bind 2nd player into RetroPie on Raspberry Pi 3

I have an arcade run on raspberry pi 3 flashed with RetroPie 4.4. I have 2 Xin Mo Dual joysticks connected. JoyStick : Xinmo Controller : Xinmo USB Encoder Note: Both controllers wired perfectly....
0
votes
1answer
134 views

Reading Real-Time Temperature of Raspberry Pi in Guizero

Is there an option to display Raspberry Pi's internal temperature value to be able to display it into Guizero UI? I saw this source code on GitHub, but this only displays random float numbers in the ...
0
votes
2answers
45 views

What is the easist way to connect a switch button to the GPIO pins?

I am trying to up my pi skills on working with hardware. I would like to connect a few buttons to my gpio pins. I have seen various ways to do so and want to know the simplest non-permanant way. I've ...
-1
votes
1answer
71 views

Rasperry Pi unable to run Intel x64 binary [duplicate]

despite having rasperry pi model 3 ver.2 with raspian jessie from official webpage i am unable to run a binary file; on file foobin i get: ELF 64bit lsb shared object x86-64 version 1 dynamically ...
0
votes
1answer
98 views

“sudo apt-get install xstlproc” returns “E:Unable to locate package xstlproc”

I'm following https://www.raspberrypi.org/forums/viewtopic.php?t=196010#p1226096 to install a mosquitto server on Raspberry Pi 3 Model B sudo apt-get install libc-ares-dev uuid-dev libwebsockets-...
0
votes
1answer
42 views

Reading multiple FM Radio Channels simultaneously

I'd like to use the Pi to make an FM radio but I also want to be able to read multiple frequencies with the Pi at the same time. Is this possible through using SDR and antenna and software? Or should ...
0
votes
1answer
77 views

NRF24l01+ Arduino to Raspberry - Receving working randomly [closed]

I am using a Raspberry Pi 3B+ (RF24 lib) and Arduino Mega (RF24 lib) I have cleaned the pins and soldered a 10 uF capacitor between vcc & gnd The distance between the two modules has no effect. ...
1
vote
1answer
79 views

Datalogging square wave signal using GPIO.BOTH

I'm currently making a datalogger using a Raspberry Pi which will record the real time and date of each falling and rising edge (GPIO BOTH) of a square wave signal (going through one input port). The ...
1
vote
1answer
26 views

Error when I run an email sending code from github on my R. Pi 3

So, I used this program from https://gist.github.com/johnantoni/8199088 To use for sending emails. I replaced everything with my own info, ie username, password, who it is to. But when I run it I get ...
0
votes
1answer
58 views

Using the Raspberry Pi and OpenVPN

I have had a burning issue with my VPN setup and I am hoping someone will be able to help, or advise. So I currently have a DD-WRT router with an OpenVPN client setup serving my devices. However the ...
0
votes
1answer
42 views

which python version supports rpi gpio libraries?

im working on raspberry pi 3 b +model i installed noobs on it ,but when i try to install rpi gpio libraries it shows their is no module named rpi gpio it is showing ,and when i want to see which ...
0
votes
1answer
50 views

How to run ssh without needing as password? [duplicate]

Want to send audio from one RPI to another over my network using sox. therefore need to run ssh without password. How to do this on a simple way?
0
votes
1answer
574 views

Workon Command not found when using pi, but works from ssh

when I run the work command to get into my cv virtual environment on my pi it displays pi@raspberrypi:~ $ workon cv bash: workon: command not found however when I ssh into my pi from my MacBook and ...
0
votes
1answer
154 views

Make wifi onboard as an access point and wifi dongle as a client

I want to turn my raspberry pi 3 witch installed Raspbian OS to access point and client to access wifi and bridge these two each other (in this question it's better to skip this bridge part). Exactly, ...
0
votes
1answer
53 views

Is there a way to change the pmount mount point?

Based on this answer for automounting USB... Running Stretch Lite on a Pi3, running Openbox window manager, no desktop or session manager. Is there a way to change the name of the mount point created ...
0
votes
1answer
452 views

How to hookup pt100 with pi 3 without max31865 for temperature logging

Absolutely noon on pi here. I wanted to make a temperature logger with my raspberry Pi 3 and a "pt100 2 wire k type" thermocouple. I spent the evening googling about it and learned that one of the ...
1
vote
0answers
27 views

Script won't continue after command line

I am very new to Pi, Python, and this kind of programming, as a whole. I am building a data logger. Once completed, it will be deployed in areas with no internet connectivity. So I chose to create ...
0
votes
1answer
38 views

RPI 3, how to connect built-in wifi to network A, additional usb wifi adaptor connect to network B

RPI 3, running the latest lite version. How can I configure built-in wifi(wlan0) to connect to only the wifi network A, additional usb wifi adaptor(wlan1) connect to network B only? Any help ...
1
vote
0answers
17 views

ssh working but i can't ping directly to the Raspberry pi router [duplicate]

Going through https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md i set up Raspberry pi as access point as standalone NAT with out bridging. wireless host is connected but ...
2
votes
0answers
96 views

What is the maximum clients a Raspberry Pi 3 B+ access point can handle?

I have setup a RPi 3B+ as access point using this tutorial: https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md I have a few dozens of RPi Zero's that connect to the AP. ...
6
votes
2answers
3k views

Access point as WiFi repeater, optional with bridge

I need a wireless access point that is bridged with the wired ethernet port and that is connected to another wifi internet router with a client connection as uplink. All devices connected to the RasPi ...
1
vote
1answer
204 views

Raspberry PI 3 hangs on startup every other time

I have an issue with my Raspberry PI running Raspbian 9 hanging on startup - but not always. It will hang every other launch. When the problem occurs, the launch first hangs with the last message ...