This topic is not posted for a long time.But I guess many users tried to use this board and refre this topic.I would like to put some suggestion.First of all, this board cannot support DS18B20. Maybe U5 in the schematic is designed for it, but target connection is A4. DS18B20 returns digital data. Therefore this function does not work.The Second thing is that there is no Bluetooth board for this shield. I checked many bluetooth module pin layout, such as HC-05, HC06 and so on, but I could not find same pin layout board.(If some knows, please, please add comment.)The third thing is 4 digits 7 segment LED has very limited function.If you tried to sample sketch, but figures are not so clear or wrong. Usually, when we use 7 segment LED, we use dynamic lightning. The reason is circuit is simple.If you want to use static lightning, we add some latch logic.But dynamic lightning method is not suitable for this type of multi function board. Because assuming to use DS18B20, we must wait 750msec.If you want to show the temperature figure using this 4digit LED, the program is very complicated. (not possible)Finally, my evaluation is bad.No document, no vender, wrong connection, hard to use.In the Arduino and other small computing world, there are too many unclear boards.Now, I am preparing 'clear use' web site.