We are looking for a very inexpensive way to connect a couple of temp sensors and time stamp and log their output. Then, after about a month, be able to drive by and download the data to our Android HTC Dream phone for uploading and analysis.
It looks like we need some sort of SD card, obviously. Perhaps, once we get the thing done we can just set it up with only the components we need as in this instructable...
It looks like we will need the Data Logger shield, which will bring our total to almost $30. U.S.
Maybe this card would be sufficient. It's only $10.00:
This whole setup is to track the temperature output of a roof-mounted solar water heater array.
Of course we would still need to factor in the cost of the SD card itself.
Any suggestions would be greatly appreciated.
Have a great evening! :)