I am very new to this type of datalogging and building (just this week while visiting SWRC). I am not really sure where to start when it comes it to which board to purchase. I do know that I need an onboard data storage device such as the SD card. And for my first build I want to use a water level, temp, and electrical conductance sensor (maybe decagon CTD). A solar panel would also be needed to keep battery charged up. I think it would cool too and use a bluetooth card that can be password protected and we connect via bluetooth to download data (maybe add this on later).
Any tips and suggestions on what to look for on deciding what board/platform to use would be greatly appreciated.