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bash-traffic-lights-pi's Introduction

Simon Prickett

Hi - thanks for dropping by. I'm Simon Prickett, an experienced developer relations professional.

In my most recent employment I was the Principal Developer Advocate for Redis where I led the team that develops course materials and accompanying example applications, videos and blog posts for our online Redis University courses. I was the principal teacher for the Redis for JavaScript (Node.js) Developers course, and have also contributed to the Redis Streams, Storing Querying and Indexing JSON at Speed and Redis for Java Developers courses. I spoke at conferences and events, desiged and delivered workshops, answered technical questions on Discord and StackOverflow and created a lot of technical live streams. I contributed code and documentation to several Redis client SDKs and other projects on a regular basis.

Outside of my day job, I enjoy tinkering with Raspberry Pi and Arduino single board computers and building hardware projects with them. I recently acquired a BBC micro:bit and need to spend some time learning about that. I periodically write about IoT topics and speak at Meetup groups or conferences.

Check out my website at simonprickett.dev. You can also find me as @simon_prickett on Twitter, and in a few other places. I'm always open to talk about developer relations, learn more about me by reading my resume.

If you find value in my projects, please consider buying me a coffee on Ko-Fi. Your support helps me buy materials for future projects.


Latest Article on my Website

Building the Lego Creator Shuttle

Latest Blog Image

I was minding my own business in the local Lidl, shopping for some breakfast items. As I turned a corner into the infamous “Middle of Lidl” aisle, I spotted a Lego Shuttle set that I wasn’t aware existed... Read in full...

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bash-traffic-lights-pi's Issues

Export GPIO pin needs delay

The first time after bootup I get a permission errors both for setting the direction and the value.
After some debugging I found that after the line "echo "$1" > $BASE_GPIO_PATH/export", I needed to add a delay, so I added "sleep 0.05 # Wait 50 ms", which resolved the issue.
I am running Python 3.7.3 on a Raspberry Pi 3B (it is in fact the latest "Octopi" software for controlling a 3D printer).

Success

After trying for an entire day, with various ways to access a Pi 3B gpio, this is the first that worked, and straight out of the box too.
Thank you very much for this.

I will be modifying this quite simply to pulse a pin starting a hardware timer that will perform a physical power disconnect when the user shuts down the Pi

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