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2022 Dec 19 Stickied -FAQ- & -HELPDESK- thread - Boot problems? Power supply problems? Display problems? Networking problems? Need ideas? Get help with these and other questions!
The software I used is WeeWx, but I modified the code (it’s open source) to show what I wanted it to show. It should be easy enough for you to modify it to collect data from your local bus/train stations instead of weather reports. Also look at this post and this software, it may help point you in the right direction for software to use to display (I can’t really think of any way to run 2 actual webpages on 2 different displays without slowing it down significantly, which is why I suggest using software dedicated to that use case)
Guides
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How to automatically start a program when turning on the pi?
There are a couple of very good guides for starting programs on Github https://github.com/thagrol/Guides
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What is wrong with my fstab file? I have attempted to add an additional mount point, but it does not mount properly
Have a look at this pdf [Github]
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Program started using rc.local keeps receiving input from stdout
Obviously as bashrc is executed when you log in connecting twice at once (e.g. two ssh sessions, a VNC + SSH etc) will mean the program runs twice while other user accounts may not run the program at all - this may be what you want but if you are expecting it to run without you having to log in (or only run once) then have a look at the cron and boot pdf guides from Thagrol here [Github]
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Kiosk CEC questions from a newbie.
There are two good guides to automatically running commands at https://github.com/thagrol/Guides - look at the cron and boot PDFs
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How do I get files from my raspberry pi 4 to my PC?
These is a full guide here (use the NAS document) but there are many web pages on SAMBA - I would look at the Pi Foundations notes here to install this and the third section to share the Pis folder.
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help needed automating a photo slideshow at system startup
I would use a systemd service - have a look at the two startup guides (cron / boot) at https://github.com/thagrol/Guides for more info on starting up programs.
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turn off screen after booting?
One of the guys in the Pi forums created a couple of handy documents for starting programs - look at the cron and boot PDFs here (the Pi OS is a flavour of Debian so the majority of the process will be fine - some of the commands used could be different or Pi specific).
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Autostarting with OpenCV
There is a set of guides here https://github.com/thagrol/Guides - have a look through the boot and cron ones for advice.
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Can I partition or map a USB port on a laptop to be recognized by other devices as a USB drive?
I think you can even loop mount the virtual USB stick's file system and read the file without virtually disconnecting the virtual USB stick. More info in this guide.
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programm with gui but without OS
I use the BLEAK toolkit for Python and Bluetooth as my sensors are GATT servers. All data is sent over BLE broadcasts. Your sensors may be different (I would expect they are) as they could be giving a constant stream of data out. With luck they are not encrypted but here you could be on your own unless someone else has used them before. Starting up a program is documented in the cron and boot PDFs by Thagrol here - these are the no. 1 goto for this on the Pi.
What are some alternatives?
amadeus-python - Python library for the Amadeus Self-Service travel APIs
flet - Flet enables developers to easily build realtime web, mobile and desktop apps in Python. No frontend experience required.
UniFi-API-browser - Tool to browse data exposed by Ubiquiti's UniFi Controller API
python-bluezero - A simple Python interface to Bluez
comitup - Bootstrap Wifi support over Wifi
magicbandreader - Reads magic bands and plays sounds and lights up leds, just like the real thing.
Client - GitLab API v4 client for PHP
rust-raspi3-tutorial - Bare metal Raspberry Pi 3 tutorials in Rust
sysmon - An intuitive remotely-accessible system performance monitoring and task management tool for servers and headless Raspberry Pi setups.
mosquitto - Eclipse Mosquitto - An open source MQTT broker
airportsdata - Extensive database of current data for nearly every airport and landing strip in the world, with over 28,000 entries.
raspberrypi-ui-mods