Clayton,
I downloaded the receiver project and it looks good, congratulations on your win.
I have a few websites I look after although I have retired from full time work but there should be space enough on my hosting account to do this.
I have some experience with MySQL database development and could knock up a db to store the information from each grabber and write php scripts to add it and display it on a page(s).
I have not looked at the firmware for the MBED as yet but presumably
it could send the parameters back to the server as a get command string similar to that which can be produced when a form is completed on a web page, I say this because I am familiar with form handling and would be able to interface this with the database without too much problem.
Ian M0BXR
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What do you think???
Clayton
VK1TKA/ZL3TKA
----- Original Message -----
From: Clayton G
To: knightsqrss@...
Sent: Thursday, May 05, 2011 10:52 AM
Subject: QRSS grabber receiver & server project
I recently entered a design project with a QRSS application. I was luck to get amount the winners with my entry. See:
The project was a small (and hence cheap) receiver (a SDR) and DSP processor + ethernet interface. The idea is that with these receivers doted around the world sending their small bandwidth of sample data to a central server we could get a central webpage to a worldwide network of grabber receivers (much like the WSPR network manages the WSPR spots). My project was the receiver end of the project only - the server itself was beyond the scope. The receiver used a cheap GPS module to calibrate its internal oscillator and hence obtain frequency accuracy (with the central server doing the necessary calculations and managing this).
The hope was to be able to build the receiver for < $100, with the only need beyond that being the power supply, antenna, and ethernet connection (ie no radio or computer required). I got the basics working, but there is still plenty of scope to improve the receiver (such as reduction of the amount of data transferred - currently it would use about 3.5GB/month), sort out the receiver design PCB etc, and to get the server operating to accept the data and manage the receivers.
Anyway, the details are in the entry documents on the website above. I would love this project to move beyond just this contest entry. Is anyone interested in being part of such a project. The main need at present is someone to take on the server side, and a suitable place to host it; although receiver work is also required. Anyone interested? I'm a bit tied up with other project at present, but can do some more work on the receiver.
Regards
Clayton
VK1TKA/ZL3TKA
