Handy little sensors
For Bluetooth Thermometer
I purchased several of these to experiment with and have found them very handy — I keep finding new uses for them all the time.
The boards are about the size of two stacked quarters, so they're easy to put just about anywhere. The radio range is quite good. I can access them from anywhere within my house, even across floors.
The developer is also very responsive and has added some great new features to the sensor application.