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by PranavLal
Mon Jun 28, 2021 2:14 pm
Forum: Troubleshooting
Topic: raspbian lite on pi 400: no sound even after installing pulse audio
Replies: 2
Views: 196

Re: raspbian lite on pi 400: no sound even after installing pulse audio

Hi,

I am willing to try ubuntu mate but need a frew clarifications.
1. Do I need to connect my online accounts to ubuntu?
2. How is raspi-config handledd?

Pranav
by PranavLal
Mon Jun 28, 2021 2:14 am
Forum: Troubleshooting
Topic: raspbian lite on pi 400: no sound even after installing pulse audio
Replies: 2
Views: 196

raspbian lite on pi 400: no sound even after installing pulse audio

Hi all, I have a pi 400. I have a HDMI cable connected to HDMI 1 and an audio extractor connected to that cable. There is a speaker connected to the extractor. I wanted to build my system from scratch so I installed raspbian lite. I need sound because I use a screen reader and also want to use the m...
by PranavLal
Sun Jun 27, 2021 5:36 am
Forum: Beginners
Topic: How do I access the top pannel and or system tray in the default pi desktop
Replies: 10
Views: 506

Re: How do I access the top pannel and or system tray in the default pi desktop

Hi kerry_s,

What is the best option for me please? I get the point about open box.

Pranav
by PranavLal
Sun Jun 27, 2021 4:45 am
Forum: Beginners
Topic: How do I access the top pannel and or system tray in the default pi desktop
Replies: 10
Views: 506

Re: How do I access the top pannel and or system tray in the default pi desktop

Hi all, Thanks for the wpa_cli scan ; wpa_cli scan_results options. I'll give them a go. I am sticking to raspbian because it has raspi-config and seems to have the bst community support for doing things like using opencv. I am open to trying other options like sway but am not certain of their acces...
by PranavLal
Sun Jun 27, 2021 12:24 am
Forum: Beginners
Topic: How do I access the top pannel and or system tray in the default pi desktop
Replies: 10
Views: 506

Re: How do I access the top pannel and or system tray in the default pi desktop

Hi, Indeed, I am aware of raspi-config and use it frequently. What I like about the GUI is its convenience. E.G., I do not have an easy way to see the strength of my wifi connection or rather, I have not discovered a different way to get this value in Linux. The same applies to Bluetooth. I can pair...
by PranavLal
Sat Jun 26, 2021 5:03 pm
Forum: Beginners
Topic: How do I access the top pannel and or system tray in the default pi desktop
Replies: 10
Views: 506

Re: How do I access the top pannel and or system tray in the default pi desktop

Hi,

That is unfortunate. Is there a way to create key bindings? Only mouse access makes the panels inaccessible.

I usually use mate but I am unable to install mate on the pi 400 due to an error with glob.py.

Pranav
by PranavLal
Sat Jun 26, 2021 6:20 am
Forum: Beginners
Topic: How do I access the top pannel and or system tray in the default pi desktop
Replies: 10
Views: 506

How do I access the top pannel and or system tray in the default pi desktop

Hi all,

I have my raspi 400 setup with the default desktop that comes with raspberry os. How do I get to the top panel or system tray? I want to manage wireless connections and to adjust the volume.

Pranav
by PranavLal
Wed Jun 23, 2021 4:56 pm
Forum: Assistive technology and accessibility
Topic: How do I tell that my raspberry pi 400 is switched on?
Replies: 7
Views: 1883

How do I tell that my raspberry pi 400 is switched on?

Hi all, Is there a way for me to tell that my raspberry pi 400 is switched on? I connect my pi to a LAN port and monitor my router logs for an IP address to be obtained. I plan to use this pi as a talking computer. I can do the same when I am at home but what about when I am traveling and in a first...
by PranavLal
Wed Jun 23, 2021 3:39 am
Forum: Assistive technology and accessibility
Topic: does x-windows require a physical monitor?
Replies: 8
Views: 3383

Re: does x-windows require a physical monitor?

Hi all,

I wish I had seen this thread earlier. Until now, I have been installing a dummy display driver. The editing of the /boot/config.txt is much simpler and is something I will be using for my new raspberry pi 400 when it gets here.

Pranav
by PranavLal
Sun Jan 24, 2021 7:42 am
Forum: Troubleshooting
Topic: v4l2loopback: unable to see multiple video devices in chromium
Replies: 0
Views: 83

v4l2loopback: unable to see multiple video devices in chromium

Hi all, I have installed v4l2loopback from source on my raspberry pi 4B. The v4l2loopback module is also loading and I have requested for 3 video devices. However, they are not being created. Here are the contents of my v4l2loopback.conf file. options v4l2loopback devices=3 card_label="device 1...
by PranavLal
Fri Aug 07, 2020 4:09 pm
Forum: General discussion
Topic: Need python script for reading values from a MB1403 HRUSB-MaxSonar
Replies: 0
Views: 130

Need python script for reading values from a MB1403 HRUSB-MaxSonar

Hi all, Has anyone used one of the newer USB ultrasound sensors from Maxbotix? I have the MB1403 HRUSB-MaxSonar. I am getting readings but am confused about when to average them and do I need to wait before taking a reading? My current script is below. #!/usr/bin/python3 # Filename: maxSonarTTY.py #...
by PranavLal
Wed Aug 05, 2020 5:00 pm
Forum: Automation, sensing and robotics
Topic: Interfacing 2 Maxbotix MB1403 HRUSB-MaxSonar sensors: dealing with seemingly unusual values
Replies: 0
Views: 124

Interfacing 2 Maxbotix MB1403 HRUSB-MaxSonar sensors: dealing with seemingly unusual values

Hi all, I have 2 Maxbotix MB1403 HRUSB-MaxSonar sensors. I have connected them to my raspberry pi 3B running raspbian buster. I am using python to access their readings which I am getting. I have the sensors facing a box. Ideally, I should get the same readings but the values are fluctuating sometim...
by PranavLal
Tue Feb 04, 2020 12:28 am
Forum: Graphics, sound and multimedia
Topic: No sound from 3.5mm jack on a raspberry pi 4 [solved]
Replies: 8
Views: 35196

No sound from 3.5mm jack on a raspberry pi 4 [solved]

Hi all, I am not getting any sound on my 3.5mm jack. I have tested with a pair of ordinary headphones and powered speakers. I have used the same configuration on a USB sound card without any problems. You can see my alsa configuration at the following link. http://alsa-project.org/db/?f=eadcce675377...
by PranavLal
Thu Jan 30, 2020 12:22 am
Forum: Assistive technology and accessibility
Topic: How do I upgrade chromium browser to version 80 or above to get orca support
Replies: 3
Views: 4551

How do I upgrade chromium browser to version 80 or above to get orca support

Hi all, I am running raspbian buster on a raspberry pi 4. The chromium browser is at version 78. How do I upgrade it to version 80 or above to get the orca support? See the below link from the orca wiki for details. https://wiki.gnome.org/Projects/Orca/Chromium It appears that the support for chromi...
by PranavLal
Wed Jan 22, 2020 4:44 pm
Forum: Assistive technology and accessibility
Topic: Orca on Raspbian Buster
Replies: 7
Views: 7300

Re: Orca on Raspbian Buster

Hi, I agree with you. We need accessibility built-in into the default image. I have just managed to get orca running on raspbian buster by installing mate. I can duplicate your results with the default desktop. I suspect the accessibility infrastructure has been stripped but I do not have any object...
by PranavLal
Tue Feb 26, 2019 12:49 am
Forum: Beginners
Topic: Autorun a program in Pixel desktop after login
Replies: 5
Views: 6434

Re: Autorun a program in Pixel desktop after login

Hi all, I am trying to automatically run the orca screen reader when pixel starts. I am stuck at the first stage. /home/pi/.config/lxsession/LXDE-pi/autostart There is no lxsession folder on my setup. I did try creating it manually but did not have any success with automatically starting orca. Has s...
by PranavLal
Thu Jan 31, 2019 12:17 am
Forum: Troubleshooting
Topic: Unable to get a waveshare 3.2 inch screen to work with a raspberry pi 3 running Arch Linux
Replies: 0
Views: 337

Unable to get a waveshare 3.2 inch screen to work with a raspberry pi 3 running Arch Linux

Hi all, I have a raspberry pi 3 that runs arch linux. I have installed a waveshare 3.2 inch screen. The screen works under raspbian. However, under Arch Linux, I am unable to get it to work. It lights up when I enable spi. However, I do not know what to do after that point. I understand that the dri...
by PranavLal
Sun Jun 24, 2018 3:17 pm
Forum: Troubleshooting
Topic: Unable to get USB webcam to work despite the pi being able to communicate with it
Replies: 7
Views: 3838

Re: Unable to get USB webcam to work despite the pi being able to communicate with it

Topguy,

Many thanks. I will try these and report. Sorry about the late response. I was out of town.

Pranav
by PranavLal
Wed Jun 20, 2018 3:08 pm
Forum: Troubleshooting
Topic: Unable to get USB webcam to work despite the pi being able to communicate with it
Replies: 7
Views: 3838

Re: Unable to get USB webcam to work despite the pi being able to communicate with it

Hi, I do have cheese installed. However, I run my raspberry pi headless and do not have the gtk installed. Cheese seems to want the gtk. $ cheese Unable to init server: Could not connect: Connection refused ** (cheese:6630): ERROR **: 15:05:51.012: cheese-application.vala:86: Unable to initialize li...
by PranavLal
Wed Jun 20, 2018 2:22 pm
Forum: Troubleshooting
Topic: Unable to get USB webcam to work despite the pi being able to communicate with it
Replies: 7
Views: 3838

Re: Unable to get USB webcam to work despite the pi being able to communicate with it

Hi winkleink,

Many thanks for your explanation and program. I cannot run your python program because I am on python 3 and am unable to install pygame.

I get errors relating to missing dependencies such as freetype.
Pranav
by PranavLal
Wed Jun 20, 2018 12:47 am
Forum: Troubleshooting
Topic: Unable to get USB webcam to work despite the pi being able to communicate with it
Replies: 7
Views: 3838

Unable to get USB webcam to work despite the pi being able to communicate with it

Hi all, I am running arch Linux on my raspberry pi 3. I am unable to get a USB UVC webcam to work. when I run the following script, I get the below error. #!/bin/bash DATE=$(date +"%Y-%m-%d_%H%M") raspistill -vf -hf -o /home/pi/camera/$DATE.jpg $ ./tp.sh mmal: Cannot read camera info, keep...
by PranavLal
Sat Sep 23, 2017 12:06 pm
Forum: Troubleshooting
Topic: Waveshare 3.2 inch touch screen displays text on console but is not recognized by X server so unable to run mate
Replies: 0
Views: 867

Waveshare 3.2 inch touch screen displays text on console but is not recognized by X server so unable to run mate

Hi all, I have a raspberry pi 3 running raspbian Stretch. I have a waveshare 3.2 inch touch screen. I have it working on the console. However, X server does not recognize it therefore I cannot run mate. I have followed the instructions at http://www.circuitbasics.com/setup-lcd-touchscreen-raspberry-...
by PranavLal
Thu Sep 22, 2016 11:38 pm
Forum: Assistive technology and accessibility
Topic: Sight for the Blind for <100$
Replies: 720
Views: 252414

Re: Sight for the Blind for <100$

Hi Jacob,
I have had something similar happen to my unit. Drain the battery, charge it again and you should be good to go.
by PranavLal
Sun Jul 31, 2016 11:29 am
Forum: Assistive technology and accessibility
Topic: Sight for the Blind for <100$
Replies: 720
Views: 252414

Re: Sight for the Blind for <100$

Hi all,

See the below website for some fantastic material on computer vision. I wonder, if we can use content based image retrieval for Semantic scene reading?
http://www.pyimagesearch.com/
by PranavLal
Wed Jun 22, 2016 11:50 pm
Forum: Assistive technology and accessibility
Topic: Sight for the Blind for <100$
Replies: 720
Views: 252414

Re: Sight for the Blind for <100$

Pranav, I have never had the issue you are experiencing. It does sound like an odd power issue. I have noticed some problems if the camera glasses I use (which have a battery of their own) are not fully charged. The glasses can place an additional power demand on the system. PL] I am using cameras ...

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