Error logging, storage, with Wifi. Best Prop board option?
T Chap
Posts: 4,223
I want to add a module to a project to log input trigger sources and errors to on board memory as well as upload errors with a time stamp to a mysql server via wifi. I have the Wifly Rn134 module that I have experience with connecting a Prop to a server. The closest thing I can find that has an on board memory and RTC is the Spinerette, I am thinking this could be used less the RJ45. I have one in a drawer somewhere I can dig out. Question is, are there any other options off the shelf with a Prop, RTC, SD card, that can allow 3v3 or 5v, GND, Rx and Tx to the Wifly?
Comments
I have a few of these on older computers in my shop and they work great. You configure the key and ssid, and the computer becomes wifi connected. I will try this with the Spinerette, maybe this will be a simpler solution to adding the Wifly.
http://code.google.com/p/propforth/wiki/Logger2Demo
Only thing missing is driver support for your Wifly, but you could use bluetooth to the PC to check it out.
We don't use RTC, we just do double math clock time, after you set the drift, its within a few seconds but drifts with temerature. It uses linux timestamps and these are doubble long (64 bit) and so won't roll over for 7,133 years. Time stamp collisions are possible but are extremely unlikely and as far as we know have not happened yet.
We do have support for DS1302 if you really need it.
We use an SD adapter as an SD slot, its not hard to solder wires to the adapter tabs (after a few tries, but they are cheap).
I tend to put everthing on a quickstart, since all my stuff is bases around quickstart + breadboard. For the loggers, I use to erco-recommended cheap regulated power supplies and the cheap LED volt meters.