The RCWL-1605 Ultrasonic Ranging Module is a compact, low-power, and highly versatile distance-measuring sensor designed for Arduino and other microcontroller platforms. Featuring a transceiver-integrated open ultrasonic design, it offers full HC-SR04 compatibility by default, making it an easy drop-in replacement with enhanced performance.

Powered by the advanced RCWL-9625/9623 chipset, the module provides a wide 2.8–5.5V operating range, simplified peripheral circuitry, and multiple communication options, including GPIO, UART, I²C, and 1-Wire. With a 25cm ultra-small blind zone, 4.5m typical max detection range, and only 2mA working current, it is suitable for both battery-powered and embedded applications.

Key Features

• 25cm ultra-short blind zone for close-range precision
• Up to 4.5m typical maximum range
• Ultra-low power consumption: only 2mA working current
• Wide operating voltage: 2.8V–5.5V
• Multiple communication modes:
  • GPIO (HC-SR04 compatible default mode)
  • UART
  • I²C
  • 1-Wire
• Built-in RCWL-9625 / RCWL-9623 professional ultrasonic processing chip
• 450ms measurement cycle
• Compact, transceiver-integrated open ultrasonic structure

Typical Applications

• Robotics obstacle avoidance
• Smart toys and automation
• Water level / liquid level measurement
• Industrial and home automation distance sensing
• General purpose ranging projects for Arduino, ESP32, Raspberry Pi