IEEE Spectrum  June 22, 2020 Researchers in Saudi Arabia have developed underwater WiFi which they call Aqua-Fi. The system is fully compliant with IEEE 802.11 wireless standards. A Wi-Fi signal was used to connect the device to a Raspberry Pi functioning as a modem. The modem converted the wireless signal to an optical signal (in this case, a laser) that was beamed to the receiver attached to a surface buoy. From there, established communications techniques were used to send the signal to an orbiting satellite. For the underwater device to receive data, the process is simply reversed. The system is […]