The first one I got was defective but Geir was very helpful with solving the problem. I sent it back to him and got it back fixed. It is working fine now. I manage to get 20,024 reading of Temp/Humid from a regular 9v battery.
Great idea of how to reduce power. Nice looking board, the only thing I would change is the SD card holder to,a click in type . The example software works well and is easy enough to change to,what you want it to do. I have just ordered a second board. It would be nice to get a smaller board that would some how fit with an arduino pro mini . Or a cut down version you could just use to time turning somthing on or off.
The data logger was bought to record battery voltage in a remote Antarctic camp every 15 minutes for 3 months in summer 2015/6. Existing solutions draw significant power, whereas this device draws almost none.
Problems were encountered because the Data Logger does NOT work with UNO r2 - it looks as if it does, but stops after a few recordings. I bought UNO r3 and it worked. Also I inadvertently reversed the shield power leads, which, although there is protection against this, apparently caused the shield to stop indicating SD card recording. It took some time to work this out.
Geir was very patient and helpful in debugging the device, allowing me to get the Data Logger ready in time for deployment to Antarctica.
The device will return in February 2016.
I was impressed with the ability of the datalogger to record for extended periods, and bought a second one.
The documentation was correct, but a bit too short in my opinion. I would have liked a little more explanation of how the logger worked, with better specifications and a description of the software.
I was looking at a way to have the ARDUINO hooked to sensors collect data over the whole summer without having to install solar pannels or recharge the battery. This shield is precisely what I needed. I installed my sensor with a 9 volt battery and it lasted 2 months in a corn field, recording data every 15 minutes. Not sure if the battery was close to empty or not, but it was still recording data when I pulled it out. Being newbies to ARDUINO, we struggled programming the code to use our sensor with the shield. Since it is not as broadly used as other shields, there was not much readily available pieces of code and info to dig in. This is why I gave 2 starts for documentation, but communicating on the forum, we were able to jump the hoops and make it work after a couple question/answer iterations. Thank for the good work and I recommend this shield to anybody that needs to log data for a long period of time.