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Questions tagged [pi-3]

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

1
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1answer
35 views

New to this, want to build solar power data logger

I need to measure efficiency of of solar panels during various conditions such as amount of uv (full sun, shade, night, night with full moon) and various temperatures. I know there's a DataLogging ...
0
votes
0answers
13 views

Using Device on /dev/ttyAMA0 instead of Wifi/Ethernet

How can I redirect all the trafic through /dev/ttyAMA0? I have my RPi connected to a LoRa-Mote over serial. Now I want to be able to send all my internet trafic over the antenna of the mote. Reason: ...
2
votes
1answer
113 views

part incompatibilities

I am trying to control a 4.5V motor with a pi. I am going to use this to control the motor: https://www.ebay.com/itm/2X-L298N-Dual-H-Bridge-DC-Stepper-Motor-Driver-Controller-Board-Arduino/...
0
votes
0answers
19 views

WittyPi won't boot Pi on schedule

I have the WittyPi 2 RTC / Power Management Module for the Raspberry Pi. I am using a premade schedule as a test. It shuts down on schedule but it refuses to boot up again. There doesn't seem to me ...
2
votes
1answer
53 views

Waveshare ADC Board negative value issue

I'm using this Raspberry Pi High-Precision AD/DA Expansion Board from waveshare. I have some questions regarding its ADC (model name: ADS1256) unable to give out negative value. Specifically, only ...
0
votes
1answer
74 views

How to create local hotspot on raspberry pi 3b to share files on android

I want create a local file shareable service using raspberry, below are the requirements: Create wifi/hotspot on raspberry (without any internet) Connect my android phone to created wifi Share files ...
0
votes
2answers
41 views

Stronger 433Mhz RF Transmitter?

I got pilight working yesterday and was able to control a (very close) Etekcity RF outlet, but I discovered that the transmitter power is too low to work on an outlet in the same room behind a couch. ...
0
votes
1answer
69 views

is undervoltage on a pi3b+ a problem of the board?

Like many others I got the undervoltage warning on a pi3b+. I see most answers blame a poor power supply. I plugged mine to a bench power supply to test this, I set it to 4 amp and kept getting ...
1
vote
1answer
41 views

Retrieve data from Smart Plug via Raspberry Pi (need help with python script)

I am using a tutorial from BeardMonkey in order to retrieve and store the measured data from a smart plug (a smart plug is monitoring the power consumption of my kettle at the moment) https://www....
2
votes
1answer
42 views

Using crontab with flock to lock a script while it is running

I'm trying to automatically run a script once every minute. But it might take more than 1 minutes sometimes & hence I have to have a lock on the script while it is running so that only one ...
1
vote
1answer
79 views

Wireless connecting of PIs

Please note that I have seen this post and I am using RPI Model 3B+ The question is: How to wirelessly connect 2 PIs which are NOT on the same network and can I do this without any external parts? ...
-1
votes
0answers
34 views

Porting tizen 3.0 on a raspberry pi 3 B+

it's my first time to run another os on my RPI3 B+ other than rasbian so I'm trying to set-up tizen 3.0 on my RPI3, I have found this link that describes all the steps to port tizen on a raspberry pi3 ...
1
vote
1answer
19 views

Virtual resolution + scrolling?

I created a small, pocket computer from Raspberry Pi 3 and small 4" display with resolution 480x320. It is very hard to do anything on such small screen, so I've been wondering, if there's a way to ...
0
votes
0answers
25 views

Chromium not launching

I’m new to raspberry pi, so I’m not sure if there’s some stupidly obvious fix to this, but chromium is refusing to load at all. I’ve updated everything through the terminal, and attempted to use ...
3
votes
0answers
27 views

Timeout waiting for hardware interrupt during work

(Full logs are also posted here) My RPi3B+ have ArchLinuxARM running on it (armv7h version). Latest kernel and all updates (only packages from official repos + yay installed from AUR). My SD is ...
4
votes
4answers
247 views

Python script not running correctly when launched with crontab

I'm running a telegram bot on my Raspberry Pi 3. When I run it in my console or using Thonny, everything runs smoothly. python3 /home/pi/Documents/telegrambot.py The problem occurs when I set the ...
0
votes
0answers
23 views

Serial communication with raspberry pi 3B and Xbee

I'm new to python programming, if I wanted to know if someone can help me with respect to reading a value that I am receiving serially. In if the topology of my network is based on two parts, in which ...
0
votes
0answers
11 views

How can I add a menu item to exit raspbian and get back to the CLI

When I boot up, I go directly into RetroPie. I can exit RetroPie and get back to the CLI to start Raspbian (startx). I learned that I can exit Raspbian with pkill x so I can start RetroPie back up, ...
0
votes
0answers
47 views

How to execute Python code in Raspberry Pi from an Android phone?

My Android phone is connected to the Raspberry Pi via Wi-Fi. Is there a way to execute a Python code (with arguments) from smartphone to Pi?
1
vote
0answers
24 views

Running Opengl application on pi 2b, frame issues. Pi issues, or optimization problems?

Here is my application that I have managed to get running on my pi. import pygame import random from pygame.locals import * from OpenGL.GL import * from OpenGL.GLU import * vertices = ( ( 1, -1,...
0
votes
0answers
21 views

Raspberry pi node: error while loading shared libraries: libl.so.6: cannot open shared object file: No such file or directory

I have a raspberry pi 3 which has been running a node JS script using PM2 for 6 months without issues . However yesterday it stoped working and gives me the following error : node: error while ...
0
votes
1answer
41 views

Several serial ports with c++

Trying to work on Raspberry Pi 3, Model B V1.2 with several serial ports with C++ code. Previously I should say that when I use only one ports everything works like a charm, so ports configuration is ...
0
votes
0answers
23 views

2 way Socket communication over bluetooth using python

Is there any way to make communication with 2 RBI over bluetooth using python Socket? Do you have some tips how can i do it? Should i use multithreading? Right now i'm using this lib -> https://...
0
votes
0answers
13 views

Identifying when Audio output is selected as Hifiberry Dac+

I am running Kodi on Raspi3 with Hifiberry dac+ . I need to toggle between external input to an amplifier v/s input from the DAC+. I am thinking of doing it based on the selection done in Kodi - ...
0
votes
1answer
76 views

Running a Python script as a service file on boot

I have a Python script (that works) set up and I want to run it automatically every time the Raspberry Pi is on. I have read that I need to create a unit file and I have done so, but whenever I try ...
1
vote
1answer
61 views

A working HDMI switch for Raspberry PI 3?

I have a Pi 3 and regular desktop computer with a single (DVI input) monitor. The desktop and Pi both have HDMI out for video. I use an HDMI > DVI cable to connect whichever device I want to use to ...
1
vote
1answer
32 views

Is it possible to revive GPIO 18 pin? [duplicate]

I guess it (pin 18) got burned after me accidentally connecting it to the 12V of the led strip and not the data pin, while the RPI ground and 12V ground were connected too. I used pigpiod, gpiotest ...
0
votes
0answers
110 views

Creating router without using ethernet

I would like to make router from my Raspberry Pi 3B+ using built-in wifi. After installing the OS, I made update, upgrade and installed packages: sudo apt update -y && sudo apt upgrade -y &...
0
votes
0answers
17 views

installed Vokoscreen

I installed vokoscreen to record my Pi desktop and I was wondering if there is any better way to record it, I like it and all, but my screen gliches, is there anything I can do to make it work faster ...
1
vote
0answers
21 views

Long term screw terminal power

Okay so I have a PCA9685 hooked up to a raspberry pi 3 so that it can control multiple servos via a c++ program. Currently, I have them hooked up to a battery pack that has red and black wires as gnd ...
1
vote
1answer
41 views

Why is /boot/config.txt executable?

FYI, I installed the R-PI minimal image with dd myself onto an sd card I was messing with the boot config when I realized that this file was set as executable. Looking at the config, I don't see why ...
0
votes
1answer
69 views

Raspberry SSH works on Linux but access denied on Windows 10

I can login with ssh my_username@192.168.0.5 when I use Ubuntu 16.04. However using Windows 10, it says PuTTY: Network error: Permission denied. Windows Power Shell: > ssh my_username@192....
1
vote
1answer
30 views

Old code running on reboot

I have a headless pi3 running Android things. My app is an irrigation system. It's out in a greenhouse, so I connect to it via wifi. I have the app running by default on boot. I can change code, ...
-1
votes
5answers
282 views

Stream Raspberry Pi camera to Android/iOS over internet

Problem : I want make live stream from my camera attached to Raspberry pi 3 b+, which is connected to home WiFi. Streaming should be over internet. So that any client like Android/ iOS can stream it ...
0
votes
1answer
28 views

RASPBERRY PI 3 B+ internet access problem

A static Ip has been given for my raspberry pi from my company. That means if a connected to my office wifi network in anytime, the ip is 172.16.100.13 I have not changed anything in my Pi. Any ...
1
vote
1answer
54 views

Raspberry pi3 model B+ connect to wifi but no internet

I have connected my raspberry pi 3 (running Raspbian) to my company's wifi network. It has connected to wifi, but there is no internet access. I cannot ping also. I did following modification in my /...
0
votes
0answers
31 views

Connectivity to internet with two WiFi adaptors

I am using Rasberry Pi with Kali Linux. I have two WiFi adapter one (internal). I am using for headless mode connection to my phone and other (external). I am using for connectivity to internet to ...
0
votes
1answer
35 views

5 volt GPIO pins on RPi not working?

So, today I made a simple LED circuit with a 5 volt pin on my Pi and it doesn't work. I tried the 3 volt ones and they work, but every 5 volt pin fails to work. The circuit just consists of a red Led,...
1
vote
0answers
19 views

www-data can't access external drive

On Pi3 with Stretch, apache is calling an wsgi script that should access a file on an external drive. Here's the apache error log: mod_wsgi (pid=7963): Failed to exec Python script file '/usr/share/...
0
votes
1answer
41 views

Not able to compile the u-boot 2017.09

This is the OS info that I am using in my pi3 (BCM 2837) board. pi@raspberrypi:~ $ uname -a Linux raspberrypi 4.14.98-v7+ #1200 SMP Tue Feb 12 20:27:48 GMT 2019 armv7l GNU/Linux [ am I using the ...
0
votes
1answer
42 views

Problem with auto pair a Bluetooth device

https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/test/simple-agent I tried the Above Python script but getting a dialogue box 'Pairing Requested'. How to remove that dialogue box?
0
votes
0answers
23 views

SIP video call Performance issue

I'm facing performance issue during video call made between RaspberryPI3 and Laptop, the video image from RaspberryPI3 are not running smooth and the overall CPU usage consumes more than 80%. Here ...
0
votes
0answers
24 views

Raspian Reset because of Widevine for libreelec

i just had to reset my Raspian Image on my SD Card because it wasnt booting up. The only thing it showed me for hours was a blackscreen. Im using Berryboot to start Raspian 2018, LibreELEC 9.0 and ...
0
votes
0answers
28 views

Connecting Raspberry Pi to old found TFT display

I have an old car DVD player sitting around that has a fairly decent secondary TFT LCD screen (hannstar 721h440b19-a1) that I thought I could use with my Raspberry Pi 3 Model B. I opened up the unit,...
1
vote
2answers
56 views

Pi with multiple HDDs from a powered hub

I am planning to use four 2.5hdd's with a pi3 B. I plan to use four 'sata to usb y' cables, with each usb power leg of the y cables plugged into a powered usb hub and each data leg into each of the pi'...
0
votes
0answers
46 views

Not seeing 3.3V between 3.3v Pin and GND

I have a voltmeter set to Volts and I have my red stick on pin 1 and the black stick on the pin 9. I just bought this Raspberry PI, is it broken? My pi is powered on and running rasbian at the moment. ...
0
votes
0answers
29 views

Retropie screen sharing

I have a RPi 3 with Retropie installed. Since I do not have an HDMI monitor, I would like to know if there is a way to use my laptop (Macbook Air) in order to display the actual HDMI output of RPi. It ...
0
votes
0answers
22 views

pi 3 boots to display no usb keyboard or mouse

Sorry if this is a dumb question. I am trying to get my Pi 3 working, it is an old one and I am sure that it has been working in the past with OSMC. My laptop is running mint 19.1, I used Etcher to ...
0
votes
0answers
16 views

How do I stabilize Raspberry Pi-3 Restarts on Inverter Change Over

I power my house with 2.4KVA Inverter while the Inverter is connected to the AC 230V Mains together with 1200Watts Solar panel. I experience steady power supply except for when ever The AC Power goes ...
0
votes
0answers
17 views

High temperature in official case with heat sink on SoC and RAM

I have, under a small desk sitting on my desk, around 6 Raspberry PIs. All of them are equipped with a cooler and the official case. Since I installed the heat sinks the temperatures rised up a good ...