All Questions

0
votes
0answers
9 views

Errors seen running openocd against firmware-0.8

I'm attempting to go though the sam3mcu programming example from the Matrix Creator wiki but I am running into error during programming. Am I missing a step to get this programmed? Ref: [sam3mcu ...
0
votes
0answers
13 views

Lagging/freezing

We are receiving signals from hardware components that we need to measure very precisely down to the millisecond. It is all working very well until a minor freeze occurs roughly about once every 3 to ...
0
votes
0answers
16 views

Raspberry VNC Server is not working

So, I have a Raspberry Pi 3 and I connected it to my laptop through Ethernet. Whenever I tried to connect my Raspberry, I often got this error "VNC Server is not currently listening for Cloud ...
0
votes
1answer
15 views

Import Error: No module named watson_developer_cloud

I'm trying to create a program that will send an image to the IBM Watson studio and use that to perform a computer vision image recognition analysis. Anyways, when I try to run the program, it only ...
0
votes
0answers
11 views

VNC Viewer and Timing Out

I am attempting to VNC access a server through a RaspPi B+ running Raspbian. I can access the server fine using ssh; however, the pi unit seems to have port 5901 and 5902 blocked. I am VPN'd into ...
-2
votes
0answers
14 views

Most reliable way to connect RPi to cellular network indoors?

I've researched various hardware dependencies, notably: GSM/SIM800 configurations I'm trying to determine which direction to go in for a project with the following constraints: predominately indoor ...
0
votes
0answers
8 views

GLSL in a Raspberry Pi

I am planning on porting C++/OpenGL code that I've written to make interactive paintings that can be sold, so a Raspberry seems like the best alternative to be able to sell a "painting" that is self ...
-1
votes
0answers
13 views

4 photos at the same time?

I want to take 4 photos with 4 different cameras simultaneously. Is this possible to do with the raspberry pi? Im trying to create a modern digital version of the Nishika n8000 which uses film. If ...
1
vote
2answers
27 views

Testing for hardware faults

I have recently been having a lot of issues with my raspberry pi 3 b+. Many seg faults and weird errors coming with programs like apt and certbot. This is on a fresh install of raspbian lite and I ...
0
votes
1answer
17 views

Raspberry Pi Camera Taking Takes Blurry Pictures

I just got a camera for my raspberry pi 3, more specifically the Arducam 5 Megapixels 1080p Sensor (https://www.amazon.com/gp/product/B012V1HEP4/ref=ppx_yo_dt_b_asin_title_o01__o00_s00?ie=UTF8&psc=...
0
votes
0answers
14 views

Raspberry Pi3 B+, connect 5V fan

I have watched a few videos on how to connect a mini 5v fan to my raspberry. I am still confused. On my fan I have one red wire and one black wire. Which pin do I connect the red wire to and which ...
0
votes
0answers
5 views

pifacecad file or directory not found

The pi itself works. Pifacecad was installed using the Farnell setup pages and seemed to be accepted. However when testing the sysinfo.py file it reported that the file or directory could not be ...
0
votes
2answers
34 views

How to know if Raspberry is running

I'd like to implement an electronic circuit to be able to restart my raspberry Pi when it has been shutdown (without plugging in and out the USB charger, which will obviously remain plugged all the ...
0
votes
1answer
16 views

make systemd restart a service with different parameters

I do understand from the configs how to make a service restart in case of a fail but in this case a simple restart would always result in the same fail again and again how can set a service to ...
-2
votes
0answers
17 views

Hidden connect ho hidden wifi networks [on hold]

I tried to connect to my company's hidden wifi network with the recommended method but i dont see it at all. Is there a chance raspbian os not support hidden networks?
0
votes
0answers
25 views

Rpi does not boot but the processor heats up very fast

A few secs ago my rpi workes fine and then, while i writing a file, it stopped working and after reconnect the power cable the green light stay dark and just the processor heats up. (raspberry pi zero ...
1
vote
0answers
17 views

Sd card gets corrupted on some monitors?

When connected to Monitor DELL e2218hn, SD card with NOOBS installed is getting corrupted within 2-3 hours of use. This is not the case with other monitors as it works really smooth. ISSUE: When Pi ...
0
votes
0answers
8 views

Bluetooth audio device as (virtual) hardware device (for SIP-calls via Linphone)

I have an external USB-Bluetooth-Dongle plugged to my Pi and a Bluetooth Speaker (with microphone) that is connected via the dongle. I manually compiled blueZ to version 5.50 and bluealsa to version ...
0
votes
0answers
7 views

Doubt related to the OTA update Mechanism for Debian Operating System

I am working on the OTA update for an embedded system project. My hardware is Raspberry Pi and the operating system is a Debian 9. This OTA update mechanism will be A + B Redundancy update. Where ...
0
votes
1answer
23 views

I need a lightweight CLI Linux Distro that can support Python

I have a spare raspberry pi, I figured i'd use it for a python releated task, is there a cut down Linux Distro that does not include a GUI but only a CLI that can also fully support running python ...
0
votes
0answers
13 views

How i can use WPS in raspberry pi 3b

I am using rapbian for my raspberry 3b+. I need headless wifi configuration for my system But, wps not working.
0
votes
0answers
28 views

“Performance” gorvernor doesn't change cpu frequency

When i tried to change the default governor of my Raspberry Pi 2 (currently at Powersave mode) to Performance mode which is expected to push my Pi's CPU freq up to its maximum number (900Mhz) by using ...
0
votes
1answer
24 views

How to power a Raspberry Pi 3B+ with DC-DC Boost Convertor module (3.5v to 5v) via GPIO Pins

I am trying to power up a Raspberry Pi 3B+ via GPIO pins and have read about the specs to provide 5V input voltage. Since there are no batteries that can directly output 5v - i had to fallback to 3.7V ...
0
votes
0answers
9 views

I have been working with a pi 3 b+ and a PWR.A53.B power and driver board

I have been working with a pi 3 b+ and a PWR.A53.B power and driver board . Sadly the switch on the power board was damaged and fell of . I couldn’t put the switch together as I lost the small pieces ....
0
votes
1answer
24 views

Use ADC with add_event_detect to detect voltage rising

I need to find a solution for my project. Basically I just need to define if there is a voltage or not by using GPIO event detection. For my basic scheme I used 3.3v pin and one of the GPIO pin for ...
1
vote
2answers
46 views

How to connect a ethernet device(having its own static I.p and netmask) via internet by my laptop?

I have a device which is used to monitor analog sensor data(Micron optics sm130 ) with ethernet port available. Its works fine if If I connect it with my laptop using ethernet cable and by configuring ...
0
votes
0answers
28 views

Radio Transmission

Yes, I pretty much a noob, but I was wondering if there is a way to program the Raspberry Pi in Assembly Code to transmit data via radio frequencies (like remote control) between itself and another ...
0
votes
1answer
35 views

Servo robot with keyboard control

I am currently creating a design project that involves controlling several servo motors for a raspberry pi 3. I want to use a keyboard to control the direction of the motors, and I am using curses to ...
1
vote
1answer
18 views

Pi Camera streaming via gpio

is there a way to transfer the video stream from one raspberry pi to another via gpio pins? One pi is In a closed container with the camera and the other pi drives the user interface. Networking is ...
1
vote
0answers
14 views

wlan0: carrier lost with specific router

so I've setup my Raspberry Pi Zero W with latest Raspbian img. Whenever I tried to connect it to the main router the syslog always says: Feb 17 23:20:36 raspberrypi dhcpcd[252]: wlan0: waiting for ...
0
votes
0answers
9 views

Using Raspberry Pi to make Sonos work with any receiver (autoswitch)

Detect audio (voltage) Send IR command (switch receiver input) Features Learn IR Command Adjust detection sensitivity Result - When a Sonos Connect zone is activated it switches receiver to the ...
0
votes
0answers
17 views

Permision denied error using paho mqtt and Adafruit 32x32 led matrix

I am writing to you because I have the following problem: I have generated a code that allows controlling a 32x32 RGB led matrix through mqtt (AWS IoTCore) using a RPi Zero W with an Adafruit RGB ...
2
votes
1answer
28 views

Generating fast rise PWM signals using software GPIO

I want to use my Raspberry Pi 3 Model B (rev 1.2) as a source for fast rise PWM signal generation. The idea is to utilize RPi as part of a cheap TDR (time-domain reflectometry) setup. For anyone ...
0
votes
1answer
16 views

How to install and use Google Chrome

I need for a project to use Google Chrome on my Raspberry Pi 3. I read a lot of articles that says it's impossible. And others wich propose to install ExaGear Desktop, but it's not free :/ I tryed to ...
0
votes
0answers
15 views

Building PyQt5 on one raspberry pi 2 succeeds, but fails on another

I am building a solution for which I need a reproducible process for installing everything necessary. When its time to build and install PyQt5 I am succeeding on one device, but failing on another. ...
0
votes
0answers
12 views

Raspberry Pi 3 B won't boot up again, even after (supposedly) clean shutdown

everyone. So I am very new to Raspberry pi. I just installed Raspbian yesterday sing NOOBS, and it was successfully installed. I played around with it after install and even rebooted it (using the ...
1
vote
1answer
19 views

Lipo Battery Voltage Drop When Pi 3B and LCD Screen Are Both Connected to Powerboost 1000

I have a Raspberry Pi 3B and LCD Controller Board connected to a Powerboost 1000 Basic. A Lipo Battery Charger is connected to the Powerboost as well. I noticed if I remove the LCD Controller board ...
1
vote
1answer
31 views

Safe power supply through GPIO pins

I'm designing a HAT and need to supply power to PI zero W and PI 3B+ through the GPIO headers[2&4]. The supply would regulated at 5V 4A (Would be sharing the same power supply with a Thermal ...
0
votes
0answers
11 views

Configure Rasp 3 b+ for automatic configuration file (pac)

I need to configure my rasp 3 B+ so that I can connect to my corporate network. In my Mac, I go to settings, network , advanced, Proxies and then Automatic proxy configuration and enter the proxy ...
2
votes
0answers
23 views

Lxpanel using 100% CPU (1 core)

On my Raspbian 2018-11-13 installation with all updates (sudo apt-get update and sudo apt-get upgrade), I see the CPU graph in the task bar (top right corner) at constant 25%. I opened a terminal and ...
0
votes
1answer
17 views

fsck.mode=force is not fixing unable to mount root fs on unknown-block(179,2)

I have 2 SD cards with Raspbian Stretch that are throwing the following error on boot: Kernel panic-not syncing: VFS: unable to mount root fs on unknown-block(179,2) I fixed one card by running ...
0
votes
0answers
20 views

webserver to use if web app have both internet and non-internet dependent tasks

I was working on an application where i have two tasks and which are interdependent Fetch some data from external server. Even if the internet gets disconnected can the same webpage call my flask ...
0
votes
0answers
16 views

trying to run bplay.py script with button press [on hold]

i need help writing script to run a python script bplay.py witch reads a rfid card to play a movie i want to trigger it with a button instead of running the terminal on button press, new to this whole ...
-2
votes
0answers
16 views

Installation of Qobuz Add-On on P3B+ is failing - Why? [on hold]

Tried to install Qobuz Add-On (d@corp-1.2.3) from music addon menue in OSMC on P3B+ , but the download/install is failing - Why?
0
votes
0answers
15 views

Power the Zero4U and Pi Zero W [on hold]

I want to power the PI and an external Hdd from the HUB, but which connector is good for that? I want to power those from a TV's USB port. How can I do that?
0
votes
0answers
24 views

Error while building opencv in raspbian stretch [on hold]

[ 66%] Building CXX object apps/traincascade/CMakeFiles/opencv_traincascade.dir/traincascade.cpp.o [ 66%] Linking CXX executable ../../bin/opencv_traincascade ../../lib/libopencv_imgcodecs.so.3.4.0: ...
1
vote
1answer
32 views

Wifi Repeater – Set Interface down by Default (dhcpcd)

I use a RPI 1 as wifi repeater with two wireless dongles. I configured it using hostapd and dnsmasq. I want the pi only to be connected to the internet if there is somebody connected to my access ...
0
votes
0answers
21 views

Industrial RFID Reader? [on hold]

I'm doing a sheep sorting system, i got all the electric ready but I can't find a good "Industrial" RFID Reader. I had the ASR550 from agrident in mind but it's way too expensive, especially for a ...
0
votes
0answers
7 views

Touchscreen (ACER UT241Ybmiuzx): multitouch is working in Chromium but not on desktop or filemanager

I'm stuck with installation of the above monitor and do not find a way forward. Touchscreen is running, operating perfectly with gestures in chromium, i.e. left click is fine. But on desktop or any ...
1
vote
1answer
22 views

No Wifi connection when HAT installed

When using a Hat for the Raspberry (MotoPi from Joy-It) the onboard wifi doesn't connect to my home wifi. But when removing the hat it just works fine. The strange thing is, that I've used the same ...

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