[Tinyos-help] FW: HMC1002 magnetic sensor question

[MURAT ARSLAN]

From: murat_a at live.com
To: awoo at cs.berkeley.edu
Subject: HMC1002 magnetic sensor question
Date: Thu, 7 May 2009 20:03:03 +0300








Dear Alec Woo

We are a research group in Middle East Technical University, Turkey, working on a WSN project. In our project, at some point, we'll use the magnetic sensor data taken from a remote node.
Our setup includes MPR2400CA (MicaZ) nodes and MTS310 Sensor Boards. The brand of the magnetic sensors on the sensor boards is Honeywell HMC1002.  

Our current aim is to observe the sensor data taken from a remote node. We are planning to use TinyOS 2.1.0 Oscilloscope application as it provides a java application for displaying the data on the screen. We go over the TinyOS 1.x code written by you for testing the sensor board which have the same brand magnetic sensor as ours on it. (http://www.tinyos.net/tinyos-1.x/apps/MicaSBVerify/MicaSBTest1/) Actually we had some difficulties on understanding the data reading process from the magnetic sensor. (Especially the adjustment and offsetting operations on the data as in the FILTER_DATA function) 
 
So our  question is the following. Could you please give some hints and explanations 
1- about the magnetic data reading process?
2- about  how to use oscilloscope application for our  forenamed objective?

Could you please send us TinyOS 2.x code for magnetic sensor reading if you have any?

We would appreciate your help.

Thanks in advance.

--
Murat Arslan
Senior Student
Dept. of EEE
Middle East Technical University




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