Questions tagged [pi-3]
For questions that apply specifically to the Raspberry Pi 3 and not other/all models.
3,199
questions
3
votes
1answer
26 views
Camera NoiIR camera wont work while my touchscreen is plugged in
I've got a raspberry pi V3. A touchscreen that connects to the DSI port and a Pi NoIR camera module and running the latest lite image. The touchscreen is a non-pi brand screen i found on amazon. It's ...
0
votes
0answers
67 views
How to encrypt whole file system of Raspbian Buster
We have done a project with Raspberry Pi 3B. I have read something about filesystem encryption of the Raspberry Pi/Raspbian. Also, I read this question which answered years ago (too old!). I didn't ...
1
vote
1answer
58 views
Where can I connect an antenna to my 433 MHz receiver chip?
I have these 433Mhz chips. I already have an antenna on the transmitter chip and it works great. The receiver works too, but you have to be really close to it for it to pick up the signal. I would ...
0
votes
0answers
26 views
How to detect a close circuit with Pi or Arduino with no/minimal disruption to monitored circuit
My pool salt chlorinator uses a flow switch (https://harwil.com/product/flow-switch-model-q-12/) to detect when the pool water is circulating, which is one of the conditions to allow the production of ...
0
votes
0answers
38 views
Multi process loop not working as expected
I am working on project where i interfaced two MCP4725 dac with my Pi for sending set point to my two PID device i.e (rpm pid and torque pid) at same time .So i used multi threading concept but i am ...
0
votes
1answer
25 views
Same code different output between Pi3 and Pi4
I got a simple rfid reader (brand unknown) connected to the serial0 rx port of a Pi4. Uploaden the following code and works perfect.
class RFID():
def __init__(self):
self.ser = serial....
0
votes
0answers
13 views
Raspberry pi 3 B with Buster can't be pinged, wlan0 stuck in DORMANT
I'm trying to use the built-in wifi on my pi. I upgraded the OS on my Raspberry pi 3 B from Jessie to Buster. Since the upgrade, I haven't been able to ping my pi. I noticed that ip link showed wlan0 ...
0
votes
0answers
16 views
Configure Raspberry Pi Stretch Network for AdHoc and Local Wifi
I am trying to connect a network of Pi's using an AdHoc network and OLSRd. However, I do not want to have to change the wifi settings each time that I need to install a package.
My solution was to ...
1
vote
0answers
26 views
Could not read all bytes from /dev/ttyS0
I try to send some data to a module which connected via UART /dev/ttyS0, I send a standard command to module and module send me back a 13 bytes acknowledgment, but the first 5 bytes of ack not ...
1
vote
0answers
14 views
Voice-enabled QnA bot [closed]
I want to develop a custom voice-enabled QnA bot. I am relatively new to the raspberry pi. I want to know if such a project is possible with this kind of hardware that raspberry pi offers. Please ...
0
votes
0answers
26 views
why does " or 'don't work on the raspberry pi 3B+ [closed]
when I try to use quotes, it never works. I Even tried changing the keyboard to querty us standard.
0
votes
0answers
28 views
Change resolution on LS055R1SX03 2k screen
I bought the HDMI to MIPI LS055R1SX03 5.5 inch 2k IPS LCD module 2560*1440 from Aliexpress,
Plugged it, and used a configuration found on the internet to be able to see any image.
Surprisingly it ...
1
vote
0answers
58 views
Raspberry Pi Security Camera and Twilio
So I am working on a 4G enabled security camera. While I know there is several options to choose from I was kind of intrigued by the Twilio Security Camera Blueprint, https://www.twilio.com/wireless/...
1
vote
1answer
58 views
writing into fifo file and reading it
1.Transmitter side code:
A)Recording audio into fifo file(no need to create fifo file separately arecord command will create fifo file):
import os
os.system('arecord -D plughw:1,0 -d 0 --rate=19200 ...
-1
votes
0answers
25 views
Is there a way to receive a 2D image from an ultrasonic sensor?
Is there a simple way to create some code that quickly creates images from readings of an ultrasonic sensor? Like, you can move it around and it shows what it "sees" on a screen.
0
votes
1answer
25 views
sainsmart relay - switches on when pi shuts down
I have a pi3 running Android. I have one app on it which is an irrigation system. The pi is connected to two 16 channels Sainsmart relay boards which control the valves and it all works just fine ...
1
vote
2answers
65 views
Use HC-SR04 Distance Sensor and Relay to trigger the Water Pump - Need help with triggering the pump
I am trying to trigger/stop a water pump with the use of a 4-channel relay and a UC-SR04 distance sensor.
I tried with some codes but I think I am missing something because although there was no error ...
1
vote
1answer
54 views
Is Mongodb latest version available on Raspberry PI 3 B?
I'm trying to install mongodb on Raspbian or Ubuntu Mate, but i have troubles finding de package on the repository to install it. The only one that is available is 2.4, but i'm having problems with ...
2
votes
1answer
43 views
is it possible to get 12 bit(4096) resolution output from pi hardware pwm pin?
I want to produce 12 bit resolution from Pi hardware pwm pin for my project. Please help me to go in right way as I am new to both Python and Pi.
import time
import pigpio as pi
import RPi.GPIO as g
...
-1
votes
0answers
27 views
Check WiFi Credentials from PHP API
I have put together a custom pi running raspbian that creates an access point if it can't connect to a wifi connection set within wpa_supplicant.conf. The mobile app connects to this connection and ...
1
vote
0answers
31 views
raspberry pi 3 spi issue
I connected MOSI to MISO on Raspberry PI 3
Executed the below code:
import time
import sys
import spidev
spi = spidev.SpiDev()
spi.open(0,0)
print(spi.bits_per_word)
print(spi.mode)
print(spi....
-1
votes
0answers
42 views
Serial reception through uart [duplicate]
I want to do real time voice communication through uart of raspberry pi 3b.Currently I am able to transmit data while recording it.But at receiver side I am not able to receive it properly.The code I ...
0
votes
0answers
9 views
Raspberry Pi 3 Model B+ and Unity3D
I have a project which is aiming to connect sensors to Unity3D by means of Raspberry Pi 3 Model B+. Therefore, my question is:
How can I send the data collected from the sensors by Raspberry Pi 3 ...
-1
votes
0answers
24 views
Manufacturing Mechanical Enclosure for Pi boards
Can I design mechanical enclosures for Raspberry Pi boards and sell them without permission? Or do I need to take permission or register before this activity?
2
votes
1answer
72 views
What does the raspberry pi “Run…” thing do?
I bought a raspberry pi a few months ago and i'm curious what the "Run..." thingy does.(see image)
I was able, to write in some commands but i'm not sure, what it does with it...
Can someone please ...
1
vote
1answer
38 views
Is there a motion/ location sensor for RPi/Python?
I'm currently working on a rough VR system using the Raspberry Pi 3, and, of course, for that, I need a way to track the custom headset and controllers. I need the sensors to be compatible with Python ...
3
votes
3answers
53 views
I messed up my RPi resolution and I can't fix it
I'm new to this website.
So I've just downloaded raspbian onto my Pi, and in the setup process and I ticked a checkbox that said something along the lines of "This resolution works". I restarted and ...
1
vote
1answer
63 views
Error Installing TensorFlow on Rasperry Pi 3 B
I'm following this guide to create an AI chatbot which requires Python 3.6, tensorflow etc. So I installed Python 3.6.8.
To install TensorFlow I tried sudo pip install tensorflow
I also downloaded ...
-1
votes
1answer
48 views
Turn GPIO pin to 5v pin
Is there a way to change GPIO function to use it as 5v power pin. Because all of the power pin used for the Touch Screen.
0
votes
0answers
16 views
Seek Compact. Easiness to configure and use
Hello everyone and happy new year.
I'm in need of a thermal camera for my project. I am considering buying a FLIR Lepton but just found out that you can use a Seek camera with the Pi as well which ...
1
vote
0answers
17 views
Infrared Camera Project: Is the following possible?
first post here/new raspberry pi user. I'd like to use the raspberry pi with the FLIR infrared camera in order to create a display-less security camera that will set a wireless alarm if a temperature ...
1
vote
2answers
41 views
How to run Minecraft 1.12.2 on the latest release of raspbian
I have tried the regular method to installing minecraft 1.12.2, that didn't find ./runOptifine1_12_2.sh: 52: ./runOptifine1_12_2.sh: /usr/lib/jvm/jdk-8-oracle-arm32-vfp-hflt/jre/bin/java: not found
...
2
votes
1answer
41 views
USB device not found in lxsession mode
When I use the desktop mode of Raspbian, I can find the connected USB device on my Pi in this path:
/media/pi/'My Usb Disk'
But when I use chromium web kiosk mode and lxsession I cannot find the ...
0
votes
0answers
42 views
Problem with Raspberry Pi 3 model B Ubuntu-Mate Error “Temporary Failure resolving ”ports.ubuntu.com"
I have a Raspberry Pi 3 Model B. I have downloaded and installed ubuntu-mate-18.04.2-beta1-desktop-armhf+raspi-ext4.img. When I try to sudo apt-get update I get the error
Temporary Failure resolving '...
2
votes
1answer
99 views
Voice transmission through UART
I want to transmit real time voice signal recorded by usb MIC through uart using Raspberry pi 3b.
But by using USB MIC it is not possible for me to transmit voice to uart directly without storing it.
...
0
votes
1answer
31 views
Is it safe to put capacitor on 3v3 pin of raspberry
I am going to use INA220 ic for current monitoring, and the datasheet says:
Use a 0.1-μF ceramic capacitor for power-supply bypassing, placed as closely as possible to the supply and ground pins.
...
0
votes
0answers
10 views
How to mount microphone and speaker, which both use pins 18 and 19?
I want to mount both an Adafruit I2S speaker bonnet and Adafruit I2S microphone on a Raspberry Pi 3. I have tested and both work independently. But both use the same pins 18 and 19, and I don't see ...
0
votes
0answers
21 views
Raspberry Pi Sense HAT Error: Unorderable [sic] Types
I have recently attempted to complete a program for my Raspberry Pi, the purpose of which is to generate a grid of pixels with randomised colours for the Sense HAT, which possesses exactly 64 pixels. ...
0
votes
0answers
25 views
wlan0 keeps coming up
wlan0 gets disabled at startup. I've checked it and it is down right after startup.
When I check 15 min later, the wlan0 interface is back up again. Is this normal behavior? If not, how can I check ...
-1
votes
0answers
30 views
Run this command at boot RPi 3b
How would you run this command automatically when the Pi boots? Tried using rc.local but it won’t run:
sudo -E flask run - -host=0.0.0.0 - -port=80 &
Thanks,
Sergio
1
vote
1answer
26 views
Can I use my retropie as a raspberry pie?
I have a raspberry pie 3, last year I installed a emulator station to use as a retropie. However I would like to use it as a normal computer now. Is it possible ? When I quit de emulator I'm not able ...
-1
votes
0answers
26 views
Live voice broadcasting from Android to Raspberrypi
I would like to broadcast voice from Android mobile to raspberry pi (3b) in local WiFi network. I would give live voice input from Android mobile phone mic and that voice must be played from raspberry ...
1
vote
1answer
84 views
Best way to control power supply?
I have a system built with a Raspberry Pi 4 and an Arduino to control its startup, shutdown and reset, I have already started to design a current monitor circuit (discussed here).
But one of the ...
1
vote
0answers
16 views
Stream videos from Raspberry Pi saved on its SD card
I am trying to figure out a way where I can stream the videos saved on Pi's SD card. I do not need live streaming. I only need to stream the videos which will be saved on its SD card. Is this possible?...
0
votes
0answers
34 views
Pi 3 is connected to internet, can't ssh or ping
The follow problem has been occurring for 2 weeks with my Pi 3 (Pi, SD card, power supply are all brand new).
After configuring, I boot up my Pi (stretch), it connects to the internet, I am able to ...
2
votes
3answers
119 views
Can I use Raspberry Pi 3 SD card on Pi 4?
I'd like to move to the new raspberry pi because I need more performance. The current sd card I used on pi 2, ane now pi 3, and I'd like to ask if anyone tried running his pi 3 raspbian on pi 4 by ...
1
vote
1answer
51 views
Cannot start the Pi - error writing RiscOS blob
I'm using Raspberry Pi Model B. I've formatted my SD card with SDFormatter, copied NOOBS files onto it and started the Pi. Then it starts setting everything up and in one point it gets this "error ...
0
votes
0answers
16 views
I want to connect respberry pi3 with smartphone through respberry hotspot
I am actually making a quadcopter which you can control with your smartphone but i am facing an issue in making connection. I want to give static IP Address to respberry pi and enable hotspot to make ...
0
votes
1answer
61 views
Wlan0 getting disabled after a request to public ip
Backstory:
I have a Pi 3b for like some years now and I've been using it as a webserver for my personal websites. Like 2 weeks ago the wlan0 interface kept going missing and tried multiple solutions ...
1
vote
3answers
74 views
Is this power supply safe to use?
I've never used Raspberry Pi before. I've got myself Model B but it didn't come with its power supply. On their official website I've got this info: You need a good-quality power supply that can ...
