Wiliot makes a sticker sized battery-free Bluetooth sensor tag with an ARM processor that's powered by ambient radio frequencies. : Wiliot makes a sticker sized battery-free Bluetooth sensor tag with an ARM processor that's powered by ambient radio frequencies. Wiliot, a fabless semiconductor startup based in Israel, announced the close of $30 million Series B round of funding from investors including Amazon Web Services, Samsung Venture Investment and Qualcomm Ventures. Wiliot makes a sticker sized battery-free Bluetooth sensor tag with an ARM processor that's powered by ambient radio frequencies.