Highly recommend this data logger shield for Arduino. I bought tree of them so far. Performance wise it will obviously take some additional time to check for battery life expectancy, but so far so good. The card sleep functionality in my opinion is a major advantage compared to other data logger shields on the market.
I believe though the card would benefit from changing the micro SD card slot for an ordinary SD card slot. It would be a great advantage, especially when changing cards during field working conditions. In my case I find the micro SD card easy to drop and the tiny card case locking mechanism easy to accidentally dent or bend when replacing cards (and the situation will probably aggravate with more usage). There is plenty of area left on the shield and using some of the (empty) prototyping area how many potential users would really miss that lost area?
The developer mentions having used the card with a 2GB card size. I have tried with Sandisk 16GB and it works just fine.
The shield documentation uploaded to Git hub have the benefit of (occasionally) being less informative and perhaps somewhere even incorrect , so it encourage you to read it in more detail before you start messing around with the code.
I had some questions, requests and remarks and contacted the developer. He was most accommodating and helpful. Responded quickly.
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.
This shield worked perfectly for our battery operated Arduino loggers. We are using a number of these shields at an edge of farm field study monitoring and recording water depth from a pressure transducers.
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.
We are doing a lot of environmental work in caves and wetlands. We use data loggers for most of the data collection. However commercial loggers are inadequate to operate some special purpose sensors. Most commercial loggers will open the gate and collect data before the sensor has a chance to warm up. Some sensors have to go through a heating cycle before they can operate correctly. The Arduino Uno works great as a controller and performs tasks to condition the sensor before data can be taken. However, this requires a fair amount of current when the logger is in sleep mode. There is always current going to the logger. Caves that we explore are not readily accessible making servicing the equipment inconvenient. This shield completely shuts down the logger in-between data collection. The timing cycles are very accurate and repeat day after day with no noticeable loss in time. This device can operate very efficiently on a single 9 volt battery. Data is collected on a single Micro SD card. To collect data, one simply exchanges cards and moves on to the next location. This shield allows the Arduino to be a very efficient data logger.
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.