The DUL radio is a compact, wireless sensor board which, using radio communication, can achieve a connection range comparable with Bluetooth. The DUL radio has a built-in accelerometer and gyroscope, equipping it to immediately register movements and transmit information about them. Other sensors and external units can also be connected. The DUL radio has been optimised to achieve an extremely low battery consumption.
Incorporating DUL radios into old books converts them into interactive tools, with the public using movement and finger pressure to interact with the books, thereby helping to compose a poem on the poetry machine. The project was developed by CAVI in collaboration with Roskilde Library.