IOT Hacking

(english/german below) **Bitcoin Pizza Dag!** Op 22 mei 2010 betaalde programmeur Laszlo Hanyecz 10.000 BTC voor twee pizza's — de eerste gedocumenteerde aankoop met bitcoin. Hij plaatste een bericht op een forum waarin hij BTC aanbood voor pizza; een andere gebruiker ging akkoord, bestelde de pizza's en leverde ze af. Die transactie werd later bekend als "Bitcoin Pizza Day". Laszlo bewees dat Bitcoin als ruilmiddel gebruikt kan worden. **Sluit je bij ons aan voor pizza-avond bij De Pizzabakkers! (vanaf 18:00)** RSVP zo snel mogelijk; we moeten reserveren bij De Pizzabakkers en er is beperkte plek. Zorg dat je je geladen Lightning-wallet meeneemt! *** **English: Bitcoin Pizza Day!** On May 22, 2010, programmer Laszlo Hanyecz paid 10,000 BTC for two pizzas — the first documented purchase using bitcoin. He posted on a forum offering BTC for pizza; another user accepted, ordering pizzas and delivering them. That trade later became famous as "Bitcoin Pizza Day," Laszlo proved that Bitcoin can be used as a medium of exchange. **Join us for pizza diner at De Pizzabakkers! (from 18:00)** Please RSVP as quick as possible as we need to make a reservation at De Pizzabakkers and there is only limited space. Be sure to bring your loaded lighting wallet along with you! *** **Deutsch: Bitcoin Pizza Tag!** Am 22. Mai 2010 zahlte Programmierer Laszlo Hanyecz 10.000 BTC für zwei Pizzen — der erste dokumentierte Kauf mit Bitcoin. Er postete in einem Forum und bot BTC für Pizza an; ein anderer Nutzer akzeptierte, bestellte die Pizzen und lieferte sie aus. Dieser Tausch wurde später als "Bitcoin Pizza Day" bekannt. Laszlo bewies, dass Bitcoin als Tauschmittel verwendet werden kann. **Begleite uns zum Pizza-Abend bei De Pizzabakkers! (ab 18:00)** Bitte antworte so schnell wie möglich; wir müssen bei De Pizzabakkers reservieren und es gibt nur begrenzten Platz. Nimm unbedingt deine geladene Lightning-Wallet mit!

[Get your tickets here!](https://ccu.stager.co/shop/default/events/111653443?utm_campaign=more-than-human-meetup&utm_source=meetup) Creative Coding Utrecht invites you to an evening of presentations and discussion on artistic and research projects at the intersection of AI, bioacoustics, and symbiotic relations. This meet-up explores more-than-human intelligences: how algorithms, birds, and other beings interact, communicate, and co-create. The event foregrounds the act of listening as a relational practice, one that spans species and technologies. **Presentations:** **BioacousticAI** This project develops deep learning methods for wildlife sound monitoring, enabling more precise and scalable assessments of animal populations. By analysing acoustic data, BioacousticAI contributes to biodiversity research and conservation efforts, offering new ways to “hear” ecosystems and their inhabitants. *Presented by Céline Angonin, a researcher and musician whose work bridges machine learning and bioacoustics, with a focus on the sonic dimensions of ecological systems.* **Chorusing Symbionts** An investigation into interspecies music, this project bridges humans, robots, and animals through ecoacoustics and embodied interaction. Inspired by AI and bioacoustic research, it proposes a form of “sensorial science-fiction,” where artificial creatures evolve in symbiotic relationship with their natural counterparts, blurring boundaries between organic and synthetic life. *Presented by Matteo Holyoke Marangoni, an artist whose practice integrates music, visual art, robotics, and new technologies to create immersive, multisensory environments.* **Vogelluisterstation** A sensor station that records, analyses and visualises bird sounds, making them accessible to both citizen scientists and professionals. The project aims to democratise ecological data, offering insights into local bird activity while lowering technical barriers to engagement with non-human worlds. *Presented by Niels Jansen, an artist, creative coder, and educator whose work explores digital improvisation in music, dance, and interactive installations.* **Program:** 19:30 - doors open 20:00 - presentations 20:45 - break 21:00 - Q&A 21:30 - informal drinks 22:00 - end event [Get your tickets here!](https://ccu.stager.co/shop/default/events/111653443?utm_campaign=more-than-human-meetup&utm_source=meetup)

Discover Utrecht on foot with our friendly tour guides! This tour will take place at 10:00 AM on Friday, the 22nd of May, and will take one and a half hours (until 11:30 AM). There are 35 spots available. The tour is free of charge for RustWeek attendees. The tour starts at Kinepolis (the conference venue). Feel free to join our Discord at https://discord.gg/FSwaWZdk6k if you have questions! Our Discord and the RustWeek website, https://2026.rustweek.org/events/social-activities/, offer more activities.

We'll start into the weekend with some Sport and what is better than having a bike tour on Friday 22nd May? If you'd like to bike along, sign up here! We expect this to take about 4 to 5 hours. On the route, we will see at least two beautiful castles, and we’ll have a pause in Breukelen where we will get a snack! **This tour is for everyone. You don't have to prepare anything, it's enough to be at the bike rental at the time.** The following information is for the curious: You can see the [tour](https://www.komoot.com/de-de/tour/2884792439?share_token=aCVbZHeYrkmmS52GP5uwrR7Q3EweCrOv65hA2MpYgtf4nSaL8V&ref=wtd) on the app [Komoot](https://www.komoot.com/). It's approx. 46km, **we may adapt it as a group on the day. As last year we’re very flexible and adaptive!** The bike rental is payed by Stichting Rust Nederland. Many thanks to Erik Jonkers for the sponsoring and to Jana Dönszelman for helping with the meetup page and organization. **Agenda** 1. We'll meet at the bike [rental place](https://willemstraatbike.nl/contact/) it is near to the conference venue. (5 Minutes by bike) 2. Everyone receives their bike. 3. We’ll go over “Hogeweidebrücke” 4. We’ll see Kasteel Nijenrode and get a snack at the marketplace of Breukelen 5. We’ll see Schloss Zuylen 6. We ride back to Utrecht and return the bikes! Looking for more fun things to do during RustWeek? Take a look at our activities page: [https://2026.rustweek.org/events/social-activities/](https://2026.rustweek.org/events/social-activities/)

**Join us for Maytime Drinks for Expats & Locals!** The days are getting longer, the weather is warming up, and it’s the perfect time to meet new people! ☀️ Join us for Maytime Drinks for Expats & Locals and enjoy a laid-back evening of great conversations, cultural exchange, and new friendships. **What to expect** * A lively and inclusive atmosphere to enjoy good company. * Conversations with a diverse mix of locals and internationals. * A laid-back evening of cultural exchange, friendships, and fun. **Who should join** * **Expats** looking to expand their social circle and make new friends. * **Locals** eager to share their culture and connect with an international crowd. * **Anyone** looking for a relaxed, social evening filled with great energy and good vibes. Don't miss out - **RSVP now** and join us for an unforgettable evening! Join the WhatsApp group: brand.page/expatslocalswhatsapp Follow us on Instagram: instagram.com/expats.locals Become a Welcomer: https://www.expatslocals.com/become-a-welcomer

*Since the guided meditations for this event are in Dutch, this description is too.* Wil je je drukke week afsluiten en ontspannen aan het weekend beginnen? Dan ben je geheel vrijblijvend welkom bij de vrijdagavond meditatie van [Jewel Heart](https://www.jewelheart.nl/). Deze meditatieavond heeft een licht en open karakter. De meditaties bestaan uit drie delen. We beginnen met het gewaarworden van je lichamelijke sensaties. In een korter deel twee doen we een loopmeditatie en in deel drie is er een eenvoudige, geleide visualisatie meditatie. Het geheel wordt afgesloten met een gesprek onder het genot van een kop thee, voor wie daar zin in heeft. 📍[Jewel Heart, Hatertseveldweg 284, Nijmegen](https://maps.app.goo.gl/D4FzqLbkaqs2JNDG8). Loop de oprit op en dan is de ingang aan je rechterzijde 🕒Zaal open vanaf 19.30 uur, meditatie van 20.00 tot 21.00 Je bent van harte welkom! Aan deze activiteit kun je per keer meedoen. Er zijn geen verplichtingen. Op vrijwillige basis kun je op de avond zelf een donatie doen. Kijk ook naar onze -[Open activiteiten](https://www.jewelheart.nl/nl/open-activiteiten/) -[Cursussen](https://www.jewelheart.nl/nl/cursussen-overzicht/)

Join us for a fun Friday night of improv theatre in English. Play, laugh, and meet new people in Utrecht during this welcoming drop-in workshop led by Burgert Kirsten, one of Improv Utrecht’s professional trainers. Everyone is welcome. You do not need any acting experience, and you do not need to be fluent in English. Many participants are not native speakers. Each week, several people join for the very first time, alongside regulars who come back again and again. Expect a group of around 12 to 22 people in total. What to expect Meet a mix of international and Dutch players Learn the basics of improvisation, a valuable modern skill Play fun and accessible theatre games Laugh a lot and surprise yourself along the way Practical information Doors open between 19:50 and 20:00. Please enter together with the group. Workshop time is from 20:00 to 22:00. Full details and route description can be found at www.improvutrecht.nl/drop-in-workshops. After the workshop, people usually head together to the pub De Hondekop for a drink and a chat. How to sign up Please mark yourself as attending via our website at at [www.improvutrecht.nl/drop-in-workshops.](http://www.improvutrecht.nl/drop-in-workshops.) If you can no longer attend, remember to remove your signup so someone else can take your spot. Price Suggested donation €10 to €20, payable in cash or via Tikkie. If you are not able to pay much, you are still very welcome. Pay what you can or what you felt the workshop was worth. Your contribution helps cover the room rental and the professional trainers. Curious about more? Check out our improv courses at [https://www.improvutrecht.nl](https://l.facebook.com/l.php?u=https%3A%2F%2Fwww.improvutrecht.nl%2F%3Ffbclid%3DIwZXh0bgNhZW0CMTAAYnJpZBExYzVUWUpNcUx3Qmxyc0tCNnNydGMGYXBwX2lkEDIyMjAzOTE3ODgyMDA4OTIAAR4aOuBKx2VBkJDoGyYCRHQXSTHuVoJHy0WS1bZAftQYuSLPcNgmTQeaBv4hpw_aem_5jJND0IPMoJD8mXqM4l2SA&h=AT0HQGS9N7lDDerT4Jh2s7yQZ3yqXcU3N7DHXcnh_ArhUbPBNnFc1Vs5ILLXJTm8W6M0qWOaOlvHeCdiG9IvYCgONK3G7Mx7YP3_ERn_wSRix-AtI5wPA8WvGq1ijPS5zLOaIIFzJ3kK6yajLPE&__tn__=q&c%5B0%5D=AT0toyw-m6q1Kl9A4pude9T05YHtdW_ajvYBWe_MixS8-d0JBdNz089yFCaZxIjsj41oPDYTZr-pLoVp3Nbw6oS2l-b59hWsbjVnOl__PH25Cx3iZDHpMxmtl8_kxDTepak27ZG-3b10bx8fSuh2QAJtRaEuxCrWtVE) Tickets for courses via [https://improv-utrecht.weticket.io](https://improv-utrecht.weticket.com/?fbclid=IwZXh0bgNhZW0CMTAAYnJpZBExYzVUWUpNcUx3Qmxyc0tCNnNydGMGYXBwX2lkEDIyMjAzOTE3ODgyMDA4OTIAAR7kmRsV6LQrIsZqtZLBNbCbr9_NHgu23lRTafAiyzXQMBjXirebJNUXyW7-Jg_aem_Ps3bRMMWxOjgfL78fqIL8w) Follow Improv Utrecht Meetup [https://www.meetup.com/utrecht-improv-theater](https://www.meetup.com/utrecht-improv-theater?fbclid=IwZXh0bgNhZW0CMTAAYnJpZBExYzVUWUpNcUx3Qmxyc0tCNnNydGMGYXBwX2lkEDIyMjAzOTE3ODgyMDA4OTIAAR4aOuBKx2VBkJDoGyYCRHQXSTHuVoJHy0WS1bZAftQYuSLPcNgmTQeaBv4hpw_aem_5jJND0IPMoJD8mXqM4l2SA) Instagram @improvutrecht Facebook https://facebook.com/ImprovUtrecht

Give your still good laptop a second life instead of ditching it because Windows 11 says it is no good... Or you heard Linux is cool. If you have a backup of your data, that is great, else indicate that you do not, so we can help you. Do so in an extra message or to m10@m10tech.nl, else I don't receive your information. Geef je laptop die het nog prima doet een tweede kans in plaats van hem af te schrijven omdat Window 11 dat zegt... Of omdat je hoorde dat Linux gaaf is. Als je al een backup van je data hebt gemaakt is dat perfect. Of verwacht je dat wij dat doen? In dat geval graag aangeven hoe vol je harde schijf nu is... Doe dat in een extra bericht of aan m10@m10tech.nl, want de info komt anders niet door.

Come along, lovely queer hikers! 🌿✨ This time we’re serving an easy-going queer nature moment with a short loop through **Landgoed Heidestein** near Zeist. Think dreamy forest paths, shimmering fens, a peaceful forest pond, and heather fields - a lot of diversity for such a short walk :) We’re teaming up with **Cocktail (COC’s group for LGBTQIA+ refugees & asylum seekers)** for this event, so besides soaking up nature, we’re creating space for connection, sharing stories, and learning from each other’s journeys and experiences. Expect a vibe that’s part hike, part picknick, part wholesome community exchange. 🌈 Bring your snacks and blankets, as we’ll pause along the way for a relaxed picnic moment together. Because queer joy isn’t just about where we go, but who we walk with. 💖 **Practical info** 📏 **Distance:** 5 or 7 km (loop walk) 📍 **Start:** Bus stop Prinses Margrietlaan, Zeist (5km option) Driebergen-Zeist station (7km option) 🏁 **End:** Back at the starting point 🥾 **Level:** easy - chill pace 🤝 **Meeting point:** outside the train station **Driebergen-Zeist at 13:45** or bus stop **Prinses Margrietlaan (Zeist) at 14:20** ❗You’re welcome to join from another direction. If you come by car you can park at P+R Driebergen-Zeist. Please note: we published this hike with Cocktail simultaneously, which is also why we lowered the participant number from Hiking Queer NL's side. Pack your: 🍱 snacks 🚰 water 🧥 rain coat/umbrella ☀️ sun screen 🏳️‍🌈 anything else you might need ❌ If you signed up and cannot make it in the end, please cancel your RSVP attendance so we know how many people will show up and someone else can take your place instead. 💗 A voluntary donation helps us to keep the Meetup group up and running :) you can either pay via a Tikkie or in cash after we finish the hike. *Hiking Queers Netherlands & Cocktail (COC)*

Join us for a relaxed and friendly matcha tasting meetup. I’ll bring matcha for everyone to try, and you’re welcome to bring your own snacks and drinks, including alcohol if you like. This is a casual event for meeting new people, enjoying Japanese tea culture, and spending a cozy afternoon together. Beginners are very welcome. Free to join.

**Modern and Authentic kintsugi workshop in Utrecht.** Choose from three options: * 1-Day Modern Kintsugi workshop-€60 * 2-Day Modern Kintsugi workshop-€96 * 4-Day Authentic Kintsugi workshop -€180 For all details, please visit my website. [https://japanworkshopnet.com/upcoming-workshops/](https://japanworkshopnet.com/upcoming-workshops/) Location: **CLAY TO PLATE** [Biltstraat 55, 3572 AG, Utrecht](https://www.claytoplate.com/) **Booking is essential**. Please contact me if you would like to participate in the workshop. Email: info@japanworkshopnet.com Mobile:0616059840

Welcome to the third edition of the Cafe Crawl series! 🥐☕ This time we're heading just outside the city center to explore the cafes of the Vaartsche Rijn area and further down in the south of Utrecht. We meet at Vaartsche Rijn station and from there we'll take a scenic walk along the canals and waterways of this quieter, lesser-known part of Utrecht, stopping at three carefully selected cafes along the way. At each stop we'll sit down, enjoy something to eat or drink, and get to know the people around us. You'll be put in small groups that switch a few times, so by the end you'll have had genuine conversations with a good mix of people. How it works: We walk, we discover, we eat something delicious, and we meet new people. The focus is on being in the moment, enjoying the city, and good company. ⚠️ If you're unsure whether you can make it, please free up your spot for someone else.

**Important time note:** Please plan on arriving between 5:30 and 6:00 as the elevators lock after 6 and you'll need to message us and we'll need to come get you. The building address is 4450 Bridge Park The entrance is 6620 Mooney St, Suite 400 You will need to scan your ID at the door to get a visitor badge. **Abstract** Like it or not, AI agents are now capable of turning a quickly written paragraph of requirements into a pull request that is ready to be integrated into real-world production applications and it's now our responsibility to make sure AI doesn't go rogue and take down prod - or corrupt our data by misunderstanding the requirements or our existing schemas. In this session we'll explore strategies to protect our codebases through unit and integration testing, documentation, and code review along with additional ways of providing context and guard rails to our AI agents as they carry out the work we've assigned them to do. By the time we're done, you'll have a firm grasp of the problem and understand some helpful options for protecting your codebase from vibe coding mishaps getting YOLOed into prod. **YouTube Link** TBD

**Huntsville Hack The Box – Monthly Meetup (In-Person + Online)** **Location:** UAH I2C, Huntsville, AL **Time:** Starts at 6:00 PM – Drop in anytime! **Discord (Join us online!):** [https://discord.gg/5sgUTzMqHS](https://discord.gg/5sgUTzMqHS) **Ready to Hack the Box (literally)?** Join us for our 10th *Huntsville Hack The Box* meetup — a free monthly cybersecurity event where beginners and experts alike team up to tackle real-world hacking challenges from the Hack The Box platform. Whether you're just curious about cybersecurity or you're already deep into pwning boxes, there's a challenge here for you. This will be our second event on hacking AI. Come join us! This month, we celebrate one year of Huntsville Hack The Box. **What to Expect:** * **Live hacking**: We'll have HTB machines at all skill levels — beginner to 1337 — for you to work on solo or with others. * **In-person & online**: Come hang out with us at the I2C or join remotely via Discord. * **Free food**: Provided by our awesome sponsor, SecurIT360. * **Prizes**: Hack The Box is hooking us up with swag and giveaways. * **No experience necessary**: Just bring a laptop. We’ll help you get started! **Don’t worry if you can’t make it right at 6:00 PM — drop in when you can. We’ll be hacking all evening.** Stay in the loop and connect with the crew before or after the event on our Discord: [https://discord.gg/5sgUTzMqHS](https://discord.gg/5sgUTzMqHS)

Christians in Tech is a community at the intersection of faith and technology. Our meetups are designed to spark meaningful conversations, promote knowledge sharing, and encourage growth—both in your career and your spiritual walk with God. Whether you're an experienced professional or just starting your tech journey, CIT welcomes you. Our Website [https://linktr.ee/citcbus](https://linktr.ee/citcbus) Sponsors and Partners * Improving (Venue Sponsor) * Bethel World Prayer Center (Fiscal Sponsor) * Fruits & Roots (Coffee Partner)

Do you feel introverted when you are in a group setting? Are you shy? Do other people have more fun than you do? There are simple life hacks you can use to improve your connection to others and improve your social life. Talking is one thing. Truly connecting is altogether another. It's the whole experience of connecting with people and forming relationships. It includes the joy, understanding, and love formed among people. * In our meetings, you will learn: * A simple life hack to increase your liking and tolerance of other people, or even of yourself! * How to become more interested and enjoy conversations with people. * How to be comfortable in social settings. * How to be yourself * How to become more extroverted and, * How to make connections with people. Feeling lonely, isolated, or bored? This local meeting is exactly what you need! Come join us! Be sure to click on the red "Attend" button below to come to the local event. We look forward to seeing you there. This group is created by the Dianetics and Scientology life improvement center.

**Welcome to Drunken Philosophy** a casual, curious social discussion **Optional topic for this meetup: What's up with all the AI hate?** A recent survey found that 74% of Americans have a negative view of AI, and I want to know why. Come out and debate whether AI is good or bad. My hot take: a labor-saving tool that could potentially help cure cancer gets called dangerous because it might raise unemployment or cause a speculative investment bubble, that tells you a lot more about capitalism and the economic system we live under than it does about the tool itself. As a computer programmer, I think AI is a wonderful tool that has increased my productivity by at least an order of magnitude. I'd go so far as to say Claude Code is the best tool I have ever used. Debate me and name a better one. Is AI potentially dangerous? Yes, but so are a lot of tools. Chainsaws. Steam engines (early ones would occasionally explode and kill everyone in the room). Do you think cavemen sat around debating whether fire could be used as a weapon or for self-harm, and decided not to discover it? I have two friends who hate AI for opposite reasons: one thinks it's a fad and not useful, and the other thinks it's going to take over everything and cause human extinction. Come out tonight, have a friendly debate, and make some friends. No lectures. Friendly crowd. Drop in for one drink and stay if it's fun.

Black Nonbelievers is proud to bring you our 2nd annual Revival of Reason!!! Join us in Atlanta as this year, we will celebrate 15 years as an organization, along with our own version of the Juneteenth holiday! Featured speakers include: – Chris Cameron – Candace Gorham – Kellie King, aka Detroit Atheist Queen – Hemant Mehta, The Friendly Atheist – Godless Engineer – Mandisa Thomas – And MORE!!! This is a family friendly event, so please bring your loved ones, and anyone who is interested in learning and needs secular support. [Sponsorship](https://blacknonbelievers.wufoo.com/forms/revival-of-reason-2026-sponsors-and-exhibitors/) and [volunteer](https://blacknonbelievers.wufoo.com/forms/revival-of-reason-2026-be-a-volunteer/) opportunities are also available. You can also register to view sessions online. Official BN members get a special discount, so [sign up or renew ](https://bit.ly/3DMndSK)today! **We look forward to seeing you at the 2026 Revival of Reason. [Register TODAY!!!](https://bit.ly/RoR2026sitepage)**

Bring your work or your hobby, hang out, and code with us. Follow @buckeyecocoa for more information.