I have been playing with the Ruuvitag and tried to read the data using a Raspberry Pi Zero W (i.e. the new one with BLE and WLAN) and your python library at Github. Worked very well. To display the values I used a Pimoroni blinkt! HAT, basically an eight RGB LED strip, giving the numbers as binary numbers.
You may find more on the project here:
I now placed the Pi and a Power bank in a clear plastic lunchbox resulting in a cheap mobile device to read the RuuviTag.