|Introducing the Arashi Ethernet Gateway for Wireless Sensor Networks||| Print ||
|Written by Akiba|
|Tuesday, 30 July 2013|
Iím proud to announce the release of two new designs, the Arashi Ethernet Gateway for both 2.4 GHz and 900 MHz wireless sensor networks. Thereís quite a bit of history for me with this design. Back when there was a meltdown at Fukushima Dai-Ichi in Japan, I grabbed some Wiznet W5100 ICs and put together a circuit that connected to and uploaded radiation data to servers on the internet. This eventually became a design I called the NetRad and was one of the first DIY geiger counters to be uploading radiation data publicly to the internet during the Fukushima crisis.
In Tokyo Hackerspace, we deployed a few of them when Sean Bonner emailed me to ask me for links to the data and if I wanted to help a fledgling group that he and Joi Ito were working with called RDTN. Later on, Sean, Joi, me, Bunnie, and a cast of others started working together and Safecast was born .
Here's a shot of one of our first meetings together in Tokyo with Bunnie, Aaron Huslage, Sean Bonner, Joi Ito, Ray Ozzie, and a bunch of people from Keio University.
At the time, geiger counters were completely unavailable which was the main reason we had to build them ourselves. Since we kept on adding to the number of networked geiger counters we had, we eventually caught the eye of a company in Japan called Softbank. Theyíre a large phone service provider in Japan and recently purchased Sprint in the US. The owner, Masayoshi Son, is the richest man in Japan and interestingly enough, even having a lot of money couldnít get you geiger counters at that time.
I was asked to attend a meeting with Softbank and Keio University. At the meeting, Softbank mentioned that they wanted to fund a buildout of the networked geiger counters across Japan. They put in approximately $1M into a Keio research fund, I became a Keio researcher that night, and hence the NetRad radiation sensor network project began. All-in-all, we deployed around 400+ networked geiger counters at various locations around Japan and the data was used to analyze the radiation in the area and also understand how the radiation decays and disperses over time. I was very impressed with the Wiznet W5100 IC and the Arduino ethernet library and the combination was extremely stable and easy to work with.
In any case, thatís my first
experience with the Wiznet/Arduino Ethernet combination and it was
great. Itís simple, reliable, and widely used in the embedded community
so thereís a good base of support for it. Itís definitely one of the
easiest ways to get sensor data out on to the internet. For the Arashi
gateway designs, I also made a few modifications which I think are
written by Weft insert stretch fusible interlining, November 14, 2013
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