All Questions

1
vote
0answers
15 views

Bluetooth Blues

I've discovered again that cursing and swearing at inanimate objects doesn't actually improve things, so I'll try posting a question. A couple of months ago I attempted a fairly ambitious project (...
0
votes
0answers
5 views

Using custom monitor with raspberry pi

I have been working on creating my own MagicMirror using Raspberry Pi 3 B+. For the monitor I have taken apart my old laptop which I'm now using as a server. I have taken out the monitor along with ...
0
votes
1answer
3 views

How to bridge the local network of an access point with a remote private network by openvpn?

My access point spawns a wireless local area network. Now I want to connect it to my other private network over the internet with openvpn so it gets direct part of the remote network in a common ...
0
votes
0answers
46 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 &...
1
vote
0answers
18 views

Error unknown machine command despite compiling without errors

I recently made a project using opencv 4 on my raspberry pi 3 b+, but then decided to port the whole project to a new raspberry pi zero, as I want to make it a permanent setup and want to keep my py 3 ...
0
votes
2answers
433 views

How To Create A Private Subnet Behind Raspberry Pi?

I have the following setup: Desktop -> [via RPI eth1] <-> Raspberry Pi <-> [via RPI eth0] -> Router -> Internet -> OpenVPN Server I created a bridge successfully but i do not believe a bridge ...
1
vote
1answer
846 views

Just one GPIO pin stopped working - fixable?

I have tested all my GPIO pins in the past, and I know they all worked as outputs. Today I was using pins 11,13 and 15 (Board numbering), and they were all working fine, but suddenly pin 15 stopped ...
0
votes
1answer
15 views

Camera with speed sensor on raspberry pi?

I'm new into coding but I'm making a project where a camera should take a picture if the Raspberry pi gets a certain value from a sensor. For example, if I have a speed sensor and camera connected to ...
0
votes
1answer
14 views

VNC disabled after each reboot

I run VNC through raspi-config. Turns on. I run sudo vncserver. Works. I reboot. Everything is shut down/disabled and i have to redo it. How can i permanently enable vnc? (raspbian, over ssh) error i ...
0
votes
1answer
11 views

Powering 100mA LED

I want to power an 1.5V LED fully and control it using pi. I can only use 16mA per pin and i need 100mA. Can you give me suggestions? I can turn it on with 5V and 35 ohm resistor but not control it. ...
0
votes
2answers
18 views

Can a single Ethernet interface be addressed on DIFFERENT subnets?

Can a single REAL Ethernet interface be addressed on (2) DIFFERENT subnets? But how can this be when a Pi only has a single REAL interface- and therefore only a single MAC address to map the (2) ...
0
votes
0answers
14 views

POE power for BOTH Pi and Hard Drives?

I have a need for some network-accessable storage for backups, in a location where there is only POE power. There is no mains AC electricity available. Ideally I'd like 2TB of space so an SSD is ...
0
votes
0answers
9 views

Creating device driver which feeds GPS Co-ordinates from phone to raspberry pi

I dont have GPS module,So i was thinking whether I can feed GPS coordinates from my android/ios phone to raspberry pi over wireless protocol like bluetooth/TCPIP. Can I create virtual device driver ...
2
votes
1answer
16 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
1answer
533 views

Raspberry Pi Crashes when I try to change screen resolution

I am running Stretch on a Raspberry Pi 3 and have been trying to change my screen resolution (connected to some Samsung touchscreen via HDMI) via sudo raspi-config the menu loads properly and I can ...
0
votes
0answers
4 views

Updating Fedora 29 gives me this “error loading repository 'fedora' has failed”

I have Fedora 29 minimal running on a Pi 2. However whenever I run the command; sudo yum update I get the following error message; error loading repository 'fedora' has failed I am able to ping ...
0
votes
0answers
5 views

wps_supplicant@.service not present in Jessie

I've been following along with the WiFi repeater setup and I've hit a snag. I am running Jessie rather than Stretch. I don't have wps_supplicant@.service in /lib/systemd/system/, just wps_supplicant....
2
votes
1answer
95 views

CM3 power-up - 3V3, 1V8 sequencing

We are developing a high volume product using a lot of CM3s and we're looking into some power-up sequencing issues. I found the following on one of the forums from 2014 (I assume it refers to the CM1)....
0
votes
1answer
23 views

How to get Raspberry Pi 3 & Android device to communicate with each other, and authenticate?

In an Android app that we created for a project (a step-counter fitness tracker), we require user authentication to access the user's data in Firebase. Same goes for the Python program in the ...
1
vote
1answer
22 views

Translation request for News re wpasupplicant during upgrade

During a routine upgrade (sudo apt-get upgrade), the following "news" appeared in my terminal window: apt-listchanges: News --------------------- wpasupplicant (2:2.6-19) unstable; urgency=medium ...
0
votes
1answer
22 views

How to copy file to USB Mounted on Pi from SSH Server

I am writing a python script that checks the files in a folder on my Android, and will copy .jpg files to a USB I have mounted on my RPi. (My Android is running as an SSH server). I am able to ...
3
votes
6answers
14k views

HTML5 Video options

My web-based application utilises HTML5 for various dynamic elements (img, video, etc). I'm hoping to be able to use RPi's for system deployment, but I can't seem to find a suitable mix of browser/...
0
votes
1answer
17 views

SSH over hotspot network?

I have looked through here a bit and seem to have a unique situation I'm trying to address. I have an iphone with my hotspot enabled. I connect to the hotspot with a raspberry pi zero w over wifi. I ...
0
votes
0answers
17 views

Mobile Wi-Fi Solution

I have created a Raspberry Pi 3A+ prototype system consisting of a rover with camera and touch screen remote control that communicate across a Wi-Fi network. My expectation was to have the rover ...
0
votes
0answers
6 views

dhclient doesent renew lease after wifi drop - wpa_supplicant

i have set up /etc/network/interfaces because i need some static adresses on single interface. This causes to use dhclient instead of dhcpcd wich works fine. Now i have the problem that when i boot ...
0
votes
1answer
13 views

Dependencies problem installing mmrcn

Hello i am trying to use ML techniques to identify cars in an image using opencv. I have been following this tutorial : https://medium.com/@ageitgey/snagging-parking-spaces-with-mask-r-cnn-and-python-...
0
votes
1answer
10k views

How to use NTP on Raspberry Pi by local NTP server

I have Raspberry Pi Model-B with the Raspbian Wheezy OS and a local NTP server. I want to synchronise my Raspberry Pi board with my local NTP server (not using the Internet). All the process must be ...
6
votes
2answers
4k 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 ...
0
votes
0answers
10 views

Software control backlight of a 3.5 inch display

I'm using a 3.5 inch SPI screen on a Raspberry PI3. I would like to know how is it possible to control the backlight value with a shell command. I try to use the command echo %s > /sys/class/...
0
votes
0answers
7 views

RPi camera OCR,and save output in variable (pyhton with tesseract)

I want to make a python code for the raspberry pi, with the tesseract OCR engine, that it keeps reading text from the camera in realtime, saves in a variable, and sends output to Arduino. Is there a ...
0
votes
0answers
14 views

Waveshare ADC Board Full Scale Issues (ADS1256)

I am using the Waveshare High-Precision AD/DA Board with my Pi to read an analogue 0-5v signal. I am using a 5V reference voltage, but I can't seem to read full scale. Applying 0V reads out -344 ...
10
votes
9answers
32k views

Lost the start button on my pi?

I was messing around with my raspberry pi and i managed to delete my toolbar. I managed to get everything back but the start button. How do I get it back??
0
votes
0answers
8 views

How can I launch RetroPie games from the command line (for Pegasus front end)

I'm using RetroPie and it was working great until I installed Pegasus front end. Pegasus is awesome, and it mostly works right out of the box because it pulls metadata and art from EmulationStation. ...
63
votes
10answers
118k views

How do I modify my Raspberry Pi to be powered over PoE?

Is it possible to modify the Pi, so that it can receive it's power via Power over Ethernet (PoE)? I would like to be able to power my unit via the ethernet cable, so that I don't have to worry about ...
3
votes
1answer
53 views

How do I add an i2c device to the device tree?

I am trying to add an mpu 9250 to the device tree of my RPi 3 A+ so that my custom driver's probe function will be called. I have followed this documentation about the Raspberry Pi device tree and ...
3
votes
2answers
4k views

How to enable or fix the TTL console connection on the Raspberry Pi?

EDIT: Finally got it to work, see answer below for a complete guide on how to make this thing work starting from scratch I have a PL2303HX cable connected to the GPIO on 5V GND RXD TXD and it IS ...
-2
votes
2answers
30 views

Can we assign external IP to raspberry pi with WiFi from router? Another live video streaming API exists for raspberry picamera over internet?

Pulling Public IP from router for four different raspberry pi 3 with inbuilt WiFi.For hosting it's video stream on static Public IP.How can this possible?Let me know if is there another solution for ...
0
votes
2answers
69 views

How to configure RPi security camera to be active when our cell phones aren't on the wifi network?

I've seen quite a few security camera examples and many have options for a duty schedule that activates the camera during certain specified days/hours to set up a routine. However I have fairly ...
0
votes
2answers
54 views

Raspbian not clearing systemd logs

I have some scripts that are running via systemctl. They generate lots of logs. My raspberry pi crashed, I checked and found out the SD card was full, and there were huge files in /var/log. I have ...
7
votes
3answers
1k views

Is URxvt's slow rendering because of the limited RAM'?

My URxvt renders text very slowly, about 5 lines per second, and doesn't render fully when resized. Is this normal for Xorg and URxvt? Is this caused by the limited RAM on the RPi or by my ...
1
vote
2answers
126 views

Power MOSFET Gate Voltage Threshold Puzzle

I am using the power MOSFET IRF504N. I am not sure if my Rpi's GPIO 3V3 signal can directly input to the gate of the MOSFET which requires 4V minimum. I guess that I don't need a gate driver to shift ...
-3
votes
1answer
36 views

Can you get Ubuntu to work on the Pi 3 B+?

I have got Ubuntu on my Pi3 B+ but it does not work, I have version 16.04 and I made sure I did everything correct, I even ran thru the process 3 times, my 3B+ is new and had no problems with raspbian....
0
votes
0answers
19 views

How can I diagnose a headless Raspberry Pi Zero W that hangs?

I'm trying to run my Pi Zero W as a motion detecting camera using RPI cam web interface but it keeps hanging after a few hours at most. Before it hangs, it can record motion detect videos and upload ...
0
votes
0answers
25 views

Accidentally clicked on “Expulse SD card” on RPI3

I accidentally clicked on "Expulse SD card" on RPI3 now I don´t have any image I can access Terminal with an SSH but if I try to connect it to my TV with an HDMI or with a remote desktop I don´t get ...
3
votes
2answers
148 views

What is eating up my data?

I have a question regarding the data usage of one of my USB 3G modems. I am currently using a Huawei E303 USB 3G dongle in a Raspberry Pi Zero W, with a normal SIM-card. I am running the RPi without ...
1
vote
2answers
78 views

eth0 interface problems

I have about 400 pi units and some of them have developed a peculiar issue. The eth0 interface appears to be up, but I can't seem to pull a DHCP address. When I set a static IP, it shows in the ...
0
votes
0answers
21 views

2 USB Sound Cards in Raspberry Pi

I have a pair of Alesis Active Monitors which have a USB input and it's a pain connecting devices to it so I felt using a Rasberry Pi with bluetooth and audio ins to allow for multiple connections ...
0
votes
2answers
37 views

Errors compiling C program with time.h library

I am facing some problems in my raspberry Pi 3 B+ when I compile this simple program that uses time library: #include <stdio.h> #include <time.h> int main(int argc, char** argv) { ...
0
votes
2answers
25 views

hostapd doesent work anymore

I was running hostapd and it worked fine but i had to reinstall the os and copied the config but now it gives me some problems. First of all hostapd was masked, then i unmasked it and tried to start ...
1
vote
1answer
2k views

How to connect with a 4G modem on RPi?

I recently purchased a Huawei e397u-53 4G LTE USB modem, marketed as the Cricket Boltz, for use as a modem with the Raspberry Pi 3 B+. This product comes with a Windows drivers which I installed on a ...

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