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Sensemakers Midsummer newsletter

From: Manon
Sent on: Monday, August 5, 2019 1:04 PM

Hi all,

Hope you’re enjoying your summer! We’ve been using the extra free time to work on our website and our dashboards. Check for example the dashboard for the MijnOmgeving project and see the difference in conduction from salt to brackish to fresh water; Noordzeekanaal (EC 001), Marineterrein (EC201), Haven Rotterdam (EC205), Muidertrekvaart (EC 002). This dashboard is part of a new comprehensive IoT backend available to our open-source projects. It was developed for us and is powered by Surf Sara.

We’re also planning the start of a new project, AstroPlant, everyone can join to make, learn, contribute & share ideas! The kickoff will be in September, after the summer break, but join us this Wednesday for a brainstorm or to work on other projects.

And of course we got new speakers and specials lined up for you; specials on Tensorflow and Micropython/circuitpython. And September 18th we have Gennady Oshovsky (Professor of sustainable (Bio)Chemical Innovation) and Just van den Broecke (Open Source Geospatial Architect) sharing their insights with us!

On September 25th we’ll do a workshop for kids and could use some extra (Dutch speaking) hands. For more info and the program see: (in Dutch). Please contact us to help out! [address removed]


  • TroubleMaker kick-off webinar at August 6th! (more information at the end of this newsletter)

  • Drinkable Rivers
    Drinkable Rivers is an international initiative in which they engage local people to care for their river through citizen science. Last year, together with over 500 citizen scientists, initiator Li An Phoa measured the water quality of the entire Meuse river. This year, we want to do more: we invite everyone to research the water quality of their local river and together create an overview of water quality in Europe. We need your help! To monitor as many rivers and people as possible, we are looking for companies, universities, schools, libraries etc. across Europe that would like to be a distribution point, or hub, for activating their local community and providing them with our water quality research kits
    The measurements will be taken from 17-24 October, 2019. Who wants to join? Shall we turn the Amstel into a drinkable river (as opposed to the Amstel Beer
    😉) Apply as a hub for “your” river via [address removed] and [address removed]

  • A new #dataviz project that visualizes how Planet's satellites creates a full image of Earth's landmass in ONE day! See how the Earth is slowly build up from each of the whopping 600,000 images taken in a single day

  • · Gotta love this website giving you the opportunity to a real-time journey through the first landing on the Moon

    Thingful” indexes dozens of IoT data repositories all over the world, ranging from environment, traffic, health and technology sensors. All these objects are connected and report geo-location and time-series data. The sensors all collect information on their own networks to get a glimpse into what’s happening in the world around us. They also did an interesting experiment, to see if they could estimate, with a reasonable degree of confidence, the temperature at every location through a combination of interpolation and correlation.
  • · WON Manistatie 
    On Wednesday September 25th, Sensemakers will do a workshop with school childeren (12-17) in the OBA during the ‘WON-manifestie’.
    The WON manifestatie is a day for students that are interested in science and want to learn some more about it. Gijs and Ted have already committed to do a workshop on ‘tinkering with sensors’ but it would be very welcome if some more Sensemakers are willing to assist: we expect about 30 students. For more info and the program see here
    (in Dutch). Please contact to help us to out!
  • · Trouble Maker is a community of hardware product developers, engineers and supply chain managers in the middle of Shenzhen, on top of the world’s largest electronic components market. From August 6th they will offer an e-membership that allows people worldwide to work together with them, either on collaborative engineering and design or components sourcing and package forwarding.
    Especially for Sensemakers that already are into product development, this might be a great opportunity to tap into the potential of this “Silicon Valley of Hardware".
    For more information about Trouble Maker and the new e-membership, see They will offer huge discounts for the first e-members.

To give you an idea of how Troublemaker can help you with, we asked Marcel van der Ven from SpeakSee about their experience:
Regarding our experience with Troublemaker, Henk and its team helped us when I first arrived in Shenzhen end of November and during my trip in April this year and my current trip. This ranged from getting up to speed in Shenzhen, quite basic things like paying suppliers, finding a supplier among the thousands which are located in this street (Huaqiangbei), ordering a PCB on a Chinese website, providing a translator during discussions with Chinese people or getting help with shipping something, among many other things. Those are quite simple things but when you’re here, you need some help to get your way around because everything works very differently then in the Netherlands especially with the language barrier.
Henk and his team also helped us with a contact for the production of the PCB, the PCB assembly and 3D printing, and they provided an engineer who managed our PCBA production a number of times. They also took care of shipments when I was already back in the Netherlands.
The e-membership that's now being offered can be quite convenient for Sensemakers I think, to give an example we also did 3D printing in the Netherlands, and then we usually payed around 80 euro for 1 sample print and that took 1 week. The same sample can here be printed for 20 euro, with 25 euro shipping and you will also have it in 1 week. So if you order multiple printed parts this can quickly add up in cost savings. The same applies for other things like the PCB and PCBA, for prototyping it’s the ideal environment here.

I know for some people it’s not an option to go to Shenzhen and do prototyping here, but with the e-membership you could still benefit from all the advantages without being here.

Events & discounts

We often have free tickets to share as well, but those are raffled off at our events and/or on Slack.

· October 29-30th SensorThings API Hackathon (website/event in Dutch)
The OGC standard SensorThings API is intended for Internet of Things applications. It is a lightweight, simple interface specification, based on REST and JSON, which allows application developers to communicate via the web with devices connected to the internet, such as sensors. As an OGC standard, SensorThings API also allows easy integration into existing Spatial Data Infrastructures or Geographic Information Systems.

Enjoy your summer, warm regards,

Gijs, Paola, Ted, Manon

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