Monday, January 7, 2013

Wizzard III ~ Updates?



CLUE?

Over the past few months I have put this on hold, mostly.  Recently I was cleaning up some files and  I did get a chance to look at the captures I did way back and may have come to one more clue: Nybbles!


Looking at these old plots I did from the handheld scope it looks like these packets are sent as 4-bit nybbles which I think is why I could never see any command leaving the console I was using the logic analyzer to trigger on the various commands.  The other reason is the bits may be sent in REVERSE order which would make the commands harder to see.

I may dust off the Bit  Pirate again and see if I can see any likely Nybbles coming out of the console. I am still pretty sure the hardware protocol is I2C-like with one clock and one Data Pin.  If I can see what the console is trying to send the data logger I may be able to correlate to a commands


 
 

BTW this SUMP analyzer is a JAVA app...it took a bit of fiddling to get it to work but it is fairly functional.

ALSO...

It seems I have been tasked to build a weather station for APRS for application in a remote desert storage container in Ocotillo Wells, California in the Anza Borrego Desert that we can place a Weather Station.  I am not clear if we will use a Vantage Station or a Wizard III.  If I can convince them to get an old Wizard and data logger I may be able to snoop the connection with it as well. Since I have the ASCII/serial version built for a PIC16F88 Microprocessor ( but not tested ) for either it will be on the air soon...But I would sure like to send the data directly from the console w/o the logger!