Digital Display Control Module for HC-SR04 Ultrasonic Sensor

he Digital Display Control Module is a versatile driver board designed to test and display data from the HC-SR04 ultrasonic sensor. Powered by an integrated STM8S103 8-bit high-performance microcontroller, this module processes distance calculations instantly, allowing you to use the HC-SR04 without an external Arduino or complex coding.

This module offers dual functionality:

1. Digital Tube Display Mode: simply plug in the sensor and connect a 5V supply (via the 2.54mm socket) to see real-time distance readings in centimeters on the bright LED display.

2. Serial Port Mode: Connect the VCC, TX, RX, and GND pins to a USB-to-TTL converter to read distance data on a computer.

With a measurement range of 3cm to 400cm, it is an essential tool for testing sensor performance, debugging robot distance logic, or building standalone measurement tools.

Features:

• Dual Output Modes: Supports both onboard Digital Tube display and Serial Port data output.

• High-Performance MCU: Built around the STM8S103 8-bit microcontroller for fast and accurate processing.

• Plug-and-Play Testing: Instantly verifies HC-SR04 performance without writing code.

• Standard Interface: Features a 2.54mm pitch socket for easy 5V power connection (compatible with LiPo batteries or jumper wires).

• Serial Communication: Outputs distance data via TX/RX pins at 9600 baud rate (Format: “D: XXX”).

• Compact & Lightweight: Weighs only 7g with a small footprint (25mm x 35mm).

Specifications:

• Main Control Chip: STM8S103 (8-bit MCU)

• Input Voltage: 5V DC

• Measurement Range: 3 cm – 400 cm

• Display: 3-Digit LED Tube

• Data Interface: Serial Port (TTL level)

• Baud Rate: 9600 bps

• Serial Output Format: “D: XXX” (where XXX is distance in cm)

• Power Interface: 2.54mm White Socket / Headers

• Dimensions: 25 mm x 35 mm

• Weight: 7 g

Applications:

• HC-SR04 Sensor performance testing

• Portable distance measurement tools

• Robotics debugging (distance verification)

• PC-based data logging via Serial Port

Package Includes:

• 1 x Digital Display Control Module for HC-SR04 (Sensor not included)

Disclaimer This module requires a separate HC-SR04 Ultrasonic Sensor (sold separately). When using the Serial Port mode, ensure correct wiring: Connect the Module’s TX to the Converter’s RX, and Module’s RX to the Converter’s TX. The 2.54mm white socket is strictly for 5V power input; do not apply higher voltages as it may damage the onboard MCU.