Questions tagged [pi-3]

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

Filter by
Sorted by
Tagged with
1
vote
0answers
15 views

How to give an image input to my OpenCV code? [closed]

I am doing OpenCV on my RPi 3b for my project on Controlled Environmental Agriculture. I completed all the coding part of the OpenCV and also wrote a code for my RPi NOIR camera to capture images and ...
0
votes
2answers
165 views

Reading only 0 from ADC using RPi SPI

Everytime I try to read analog channel 0 from ADC, it only prints 0. I am confused why. I shorted MISO and MOSI on my RPi to check SPI send/receive and it was working. But if I test it after properly ...
1
vote
0answers
37 views

Bluetooth Device keeps connecting/disconnecting (Raspi 3B, Stretch)

I set up my Raspi as A2DP sink and I am able to connect my Laptop and stream audio to the pi. Now I want to connect another device to stream it's audio signal and make FFT analysis. The problem is ...
2
votes
2answers
109 views

Print PDF files using Python code

This Python code works in Windows but does not work in Raspbian. How do I print PDF files using the Raspberry Pi? import os fd = os.startfile("/home/pi/Desktop/a.pdf", "print")
1
vote
1answer
45 views

webos image not working on raspberry pi 3

on: http://build.webos-ports.org/webosose/raspberrypi3/ There are several .rpi-sdimg files for raspberry pi 3. I have flashed a couple of them on to a SD card but when I power them up in my raspberry ...
1
vote
2answers
30 views

ESD Protection for RetroPi Arcade Cabinet Setup

I built a retropie arcade system for my father-in-law as a Christmas present. Since then, I have noticed that whenever one of my nephews plugs in a USB controller there is an ESD discharge on the USB ...
0
votes
0answers
40 views

Raspberry Pi Wifi Access Point Ubuntu Mate

How can I set up a wifi access point on a Rasberry Pi 3 Model B running Ubuntu Mate? Many other people mention using Raspbian, but none of those methods have worked so far. Thus, I was wondering how I ...
1
vote
1answer
76 views

Can't read the analog channels from my ADC board using raspberry pi I2C

It seems like the ADC I am using does not provide instructions about how to communicate with the pi using the I2C interface. Does that mean I can't use I2C? I have the register addresses for all the ...
-2
votes
2answers
38 views

ARDUINO Code in Raspberry Pi 3

I'm new with this kind of projects and I'm trying to do my graduation project using Raspberry Pi 3 and vibration sensors. The sensor is Piezo LDT0-028K and I'm using ADS1115 to convert analog to ...
1
vote
1answer
42 views

Add Touch Mode feature to Minecraft Pi

I have Raspberry Pi 3 Model B+ with 5 inches Display with touchscreen for my challenge [Display works successful!]. I am using Debian Raspberry OS. I am on the file in /home/pi/mcpi/api/python/mcpi/...
0
votes
0answers
32 views

Which language is best for Raspberry Pi Apps for better GUI and Firebase

I want to develop Raspberry Pi app which requires lots of REST API calling, GPIO controls and very best GUI. I have done research on following. Running C#.net or VB.NET apps in Raspbian OS using Mono....
1
vote
1answer
232 views

ALSA input error (snd_pcm_open): No such file or directory - Problem with running Pd with ALSA

I am pretty new to Raspberry Pi, so sorry if I might be not clear on something. I am trying to set the Raspberry Pi 3 to work running a Pure Data patch while communicating with two Arduino UNO, and ...
2
votes
1answer
286 views

Active Buzzer makes sound on both LOW and HIGH

Goal: I want to replace a status-LED with a status-buzzer I use the same code which worked with the status-LED: (1) on start set buzzer to LOW (2) wait some time, than "blink" once (HIGH 200 ms then ...
1
vote
0answers
274 views

Installing scipy on python 3.7 with raspbian

I followed the guides for installing python 3.7 and the installation went without issue, and code I write can run just fine. Installing other modules like numpy and matplotlib doesn't result in any ...
1
vote
1answer
41 views

Raspberry PI 3 B+ as NTP server cannot sync

I have setup my RPI 3 B+ model to act as an NTP server but I'm not able to sync my window machine to it. The NTP server uses PPS from GPS devices (Adafruit ultimate GPS hat) attached to external ...
0
votes
1answer
37 views

Raspbian and .net core

I have a problem. I have newest raspbian, and I have installed .net core 2.1 on it, well everything looks fine until i reboot pi. After reboot .net core command stops to work and i have to add ...
1
vote
1answer
42 views

Raspberry Pi 3 B not working after interrupting the Raspbian Upgrade

I was upgrading my ADC Hat mounted(no other sensors), Raspberry Pi 3 B (Stretch installed) using; sudo apt-get update sudo apt-get upgrade During the middle of the upgrade, there was a message with ...
0
votes
0answers
30 views

Connect 3 Raspberry pi using i2c

I'm trying to use i2c to exchange messages between 3 raspberry pi, all of them must receive a message do something and then send a response. Raspberry as an I2C SLAVE From here I came up with a ...
1
vote
2answers
118 views

Setup WiFi on Pi 3 B+

I follow this tutorial to setup WiFi on my Pi. But it doesn't work. Can someone help? Here are some debug outputs. os: Linux raspberrypi 4.14.98-v7+ #1200 SMP Tue Feb 12 20:27:48 GMT 2019 armv7l ...
1
vote
1answer
75 views

Serial commands over Ethernet RPi 3b

I am trying to send LinBus protocol serial commands over the ethernet port of my Raspberry pi to a linear actuator connected on the other end via ethernet. Currently, I am using pyserial script to ...
1
vote
1answer
93 views

Unable to use tor for all traffic directed through Raspberry Pi 3

Before all of this, I wanted to make my raspberry pi a wireless access point so that all traffic is anonymous through tor. I currently have Raspberry pi 3 b+ and I installed Raspbian freshly. Pi 3 B+ ...
1
vote
0answers
29 views

Can you get minetest 5.0.0 on the raspberry pi 3 b +?

I use minetest 4.17 on the raspberry pi and all the games are updateing, I really want to find a way for 5.0 to work on the pi, please help me!!!
1
vote
0answers
24 views

CAN bus read on RPI3

I have 10 CAN IDs on the bus and would like to read all the 10 IDs every 0.1 seconds. I was able to write the code below but it shows me one message only. import can bus = can.interface.Bus ("can0", ...
1
vote
1answer
42 views

Python button double press

I'm about to start building a wireless custom doorbell system using pigpio. It is a three piece system that I will be making. The front doorbell which will communicate via two scripts to two different ...
1
vote
1answer
70 views

Python Can bus read every 0.1 seconds

I have been trying to write a code that would allow me to read all the data on the CAN bus every 0.1 seconds. There are 10 messages on the bus that are being sent every 0.1 seconds from another RPI3. ...
0
votes
0answers
36 views

Can't run a command using Raspi_Runner

I've setup Raspi_Runner to auto run commands reading from a text file every x minutes. Raspi Runner is a BASH script which runs all your scripts delivered by e-mail. It works good with commands like ...
2
votes
1answer
73 views

Can I run Pi-hole and other applications at the same time on one pi?

I never had a Pi before and want to get me a pi-hole for my network. Is it possible to run pi-hole on a pi and some other applications like: That one that emulates chromecast? MiracleCast? Something ...
1
vote
0answers
55 views

Raspberry Pi Qt toolchain on Ubuntu 16.04

I have issues creating a tool-chain for cross compiling Raspberry Pi 3 Qt applications through Ubuntu. I used directions from this guide, https://wiki.qt.io/Raspberry_Pi_Beginners_Guide, to help me ...
-1
votes
1answer
53 views

Hostapd and dnsmasq are set up but i dont get any signal on my devices

i have set up hostapd and dnsmasq and ran into some issues. at first the issue was that hostapd didn't recognized the driver. after i deleted that line it did start up. then dnsmasq told me that there ...
0
votes
1answer
34 views

Unable to Ping to / from PC to Pi 3 B+

I have similar issue as mentioned in below link Raspberry Pi 3 B - no ping from Windows Computer on LAN The pi model is 3B+ and have installed latest NOOBS from the below https://downloads....
0
votes
1answer
52 views

File transfer between raspberry pis via GPIO pins

I'm trying to send image(3MB) captured by one pi to another pi, external WIFI or setting up one pi as AP is not possible due to strict regulations, all I can use are the two wires. Currently I'm ...
3
votes
1answer
88 views

Controlling a High Power 13V DC Motor with in-built Hall Effect sensor

I am a beginner with electronics and RPi. I have a Brushed DC Motor that runs at a constant 13V and draws about 4-5 A while running and about 18-20 A at stall. It also has a single Hall effect sensor ...
1
vote
1answer
105 views

My Access Point isn't working, could I get some help?

I went through a tutorial on thepi.io. However, my AP isn't showing up or not working. I ran the: sudo hostapd /etc/hostapd/hostapd.conf then it came back as: failed to create interface ...
0
votes
1answer
232 views

Ubuntu MATE Pi not connecting to monitor?

I just flashed a MicroSD card with Ubuntu MATE. I booted up my Pi 3 Model B with it and the monitor is just showing a black screen. The monitor looks like it is connected to the Pi, because it is on ...
4
votes
2answers
1k views

How many serial ports are on the Pi 3?

How many serial ports are on the Pi 3? There is one on the GPIO pin that goes to ttyS0. Is there a separate one for USB? I have read somewhere about /dev/ttyUSB0. Is that a separate serial port? ...
0
votes
1answer
105 views

How do I can connect to static IP eth0 through wlan0

What I want to do : Device A (PLC, static ip=100.10.10.11) | | eth0 connection | Device B (raspberry B3, Rasbian lite) | | wlan0 (wi-fi) OR USB to Network ...
0
votes
2answers
44 views

How to send a file to RasPi from different computers?

It is first time for me working with RasPi. I would like to send a file (if possible via mail in the form of attachments) to my RasPi, from one/more computers (which are connected via Wi-Fi). Is it ...
3
votes
2answers
494 views

I want to run a Python 3 script on startup and in an endless loop on my Raspberry Pi

I have created a smart vending machine using my Raspberry Pi. For now, I open the Raspberry Pi using SSH and run the script manually for every transaction. I want to automate the process and run the ...
1
vote
3answers
53 views

How to add text file to Raspberry Pi folders' directory without opening the operating system

I need to add a text file to any raspbian folder but without opening the OS. I tried as follows: I inserted the SD card in my computer. I sent the text file to the SD card. I found the file in the "...
2
votes
1answer
36 views

Normal Work of RPi 3B+

I am newbie and i want to understand watching only on indicators, is Rpi 3 B+ work quite well? I mean, are green and red lights should glowing both permanently together or red light can glows ...
-1
votes
1answer
77 views

Raspberry Pi at scale, how to get unique id that can be read from software and hardware

We are going to adopt Raspberry Pi in our products, this means the RP must associate with unique product. Given that RP does not have any printed serial number on its board, How one can get any unique ...
0
votes
2answers
50 views

raspberry pi 3 with GPS HAT, status code (data is void)

Hello I'm new in python and raspberry, today I try to run a script take in 'https://www.rhydolabz.com/wiki/?p=18639#comment-47045' But I don't have a valid data in my status code. The code : #...
1
vote
0answers
43 views

DS18B20 temp sensor works on Pi 3B+ but not Zero W

I have a breadboard prototype working with a cabled (waterproof and regular temp) DS18B20 sensor and a AM2302 sensor on a 3B+. All is well with it recording at a set interval from each sensor. I'd ...
1
vote
0answers
37 views

Issue with controlling GPIO via Flask web app

I am currently building a project in which I am using a Flask web app to control various different components with the pi's GPIO. The issue i am currently having is stopping the execution of code that ...
0
votes
0answers
46 views

My Raspberry Pi Flask server stops responding

I have a Raspberry Pi 3. On my Raspberry Pi I have a Python script that initializes a Flask server, the Python script returns some basic JSON. The Python script is initiated on boot using process ...
0
votes
1answer
226 views

RPI 3 B+ configured as wireless extender (AP + client) troubleshooting

Im trying to configure my RPi 3 B+ as a wireless extender using the internal wifi chip aacting as the client and AP. Ive been following this guide as it seems most suitable for os/model/application ...
1
vote
2answers
55 views

Got 3 heatsinks with my raspberry pi?

I got 3 heatsinks with my raspberry pi 3 B+ which was ordered via my school. I got 2 small ones (both the size of the Ethernet chip) and a big one(size of SoC). So far websites always tell me to put ...
0
votes
1answer
109 views

How can I install java on a raspberry pi running kali linux

I am trying out kali Linux on my raspberry pi for the first time, and I am trying to install java, as I use it a lot on my pi. I didn’t want to give this up because of my new os. However, when I try ...
1
vote
1answer
79 views

Rasp pi 3 reliability - automatic updating a problem?

I have a pi 3 with Android Things that I use to control an irrigation system. It connects to wifi, gets the weather forecast and controls the irrigation valves based on the weather info. It runs ...
0
votes
0answers
33 views

Daily Deviation Picture Frame on RPi

This guide, Raspberry Pi - Daily Deviations Picture Frame, seems to be not working anymore. I tried different methods and it seems that the code in getting images from Deviantart daily deviations ...