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1  Development / Other Software Development / Re: Agentuino - A lightweight SNMP Agent on: December 09, 2011, 01:33:42 pm
Thanks for the circuit diagram!  Currently the system has been up for more than 5 hours with just the code changes.  I'll monitor it over the weekend and see how it behaves.
2  Development / Other Software Development / Re: Agentuino - A lightweight SNMP Agent on: December 09, 2011, 11:41:08 am
It would be great if you could send me your 555 watchdog circuit.  BTW, thank you so much for sharing your code.  Your example really helped.
3  Development / Other Software Development / Re: Agentuino - A lightweight SNMP Agent on: December 09, 2011, 07:41:18 am
Yesyes,

I been using your Weather Station code as a basis to create a simple test using a TMP36 temperature sensor connected to analog0.  For the most part everything works well.  However, there are two problems:
1. The device does not respond if I connect the power (wall wart or usb).  Only after pressing reset does everything start working.
2. After a few hours the device hangs up and the SNMP stops responding.  I can still ping the device but no SNMP until I do a reset.

By comparing the first Weather Station code that I found initially in a previous post and the code in the post above I saw that you added a watchdog timer to the setup routine.  I don't know what a watchdog timer is but I added it and will be testing for stability.  Any tips would be greatly appreciated.

Also, I noticed that this line is commented out //    Agentuino.responsePdu(&pdu);


Have had any luck troubleshooting your issues?

The Agentuino library seems to be such a useful tool if it could be polished just a little more.  I wonder if anyone would work on it for a bounty?
4  Using Arduino / Project Guidance / Re: Visible Light Communications and Arduino on: August 05, 2011, 11:01:45 am
I suspect the technology is out of reach for the home hacker for now.  Here is an interesting presentation by researchers at the University of Oxford:

http://smartlighting.rpi.edu/resources/PDFs/Smart_Lighting_ERC_OBrien_11_02_08.pdf
5  Using Arduino / Project Guidance / Visible Light Communications and Arduino on: August 05, 2011, 10:11:28 am
There has been a lot of press lately regarding the emerging technology of Visible Light Communications.  Has anyone here looked into the feasibility of using the Arduino to experiment in this field?

Possible projects:
+ home automation modules to replace X10 type functionality
+ indoor position finding for robots or humans
+ Wifi replacement

I am just learning about the technology and am not at all sure if the Arduino would be the platform to work from.  Perhaps dedicated digital signal processors are required due to the high speeds involved?

Is there anyone here with hands on experience?
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