Archive for the ‘Sensor Networks’ Category

Intel Research at Berkeley

Posted on the May 13th, 2004 under Internships,Sensor Networks by

I had interned at Intel Research at Berkeley in the summer of 2004, under the supervision of Dr. Wei Hong. I started some work on sensor network monitoring which, later, has resulted in a paper of failure detection in wireless environments. I have also collaborated with a number of outstanding researchers, such as Joe Hellerstein, David Culler, David Gay, and many others, many of the original developers of TinyOS and subsequent developers at ArchRock . I have participated in the early stages of deploying a sensor network to monitor the Intel production facilities in Hillsboro, OR. We were also let into Intel’s top-secret D1D research plant, and remember watching the production line for what, I’m guessing, later became known as Core2Duo x86 processors, in total awe. I have finished the summer and received the highest commendation in my end-of-internship evaluation.

Sensor Network Programming

Posted on the May 13th, 2003 under Sensor Networks by

In order to program the sensor network, a group of grad students from NMS that was interested in sensor networks has created a fork of the Motelab codebase , with many extensions such as robustness to node failure and various hardware glitches, reprogramming retries, etc. My main contribution was a set of routines which allowed interaction with the Motelab web front-end from Perl scripts. I have also done a little work to help get EmStar to run on Mica2 motes, and integrate it with Motelab code.

Sensor Network Deployment

Posted on the March 13th, 2003 under Sensor Networks by

With a bit of help of other grad students from MIT Sensor Technologies group (MIST), I have deployed a 55-node wide-area sensor network testbed of Mica2 motes running TinyOS. I actually deployed this testbed three times, the first time in Tech Square 200 (which our building was still called LCS), the second time after our move to CSAIL, and the third time in order to equip our sensor nodes with enclosures. I also developed a toolset for programming the nodes and collecting experimental results.

A wireless sensor node in a custom-made enclosure tucked away on the shelf.

Sensors are exposed through the port in the sensor node enclosure.

The open case reveals the sensor node attached to the reprogramming board. This board was used to reprogram the nodes and collect experimental results over Ethernet. Of course, nodes in sensor networks "in the wild" would run on batteries and use wireless communication only.

Closeup: the Mica2 mote (left) and the sensor board (right) with light, temperature, and sound level sensors.