Is This Underwater Transducer a Depth Sounder in Disguise? (L04)

Dive into the world of underwater exploration and discover if this Alibaba transducer is actually a depth sounder in disguise! The "L04 RS485 UART Control IP68 Waterproof underwater ultrasonic transducer" was hooked up to an ESP-32 Arduino board to wirelessly transmit depth data. A floating sonar buoy was fashioned out of a plastic container and casted out for testing. Electronics used: -"ESP32 Development Board WiFi+Bluetooth module Ultra-Low Power Consumption Dual Core NodeMCU-32S ESP32-WROOM-32D 32U 30Pin Board" -"L04 RS485 UART Control IP68 Waterproof Small Size Narrow Angle Swimming Pool Cleaner Underwater Ultrasonic Transducer" Time Stamps: 00:00 Intro 00:15 Setup 00:50 Sensor Test 01:20 Buoy Setup 02:15 Outdoor Testing Credit: Music by CreatorMix.com