HC-SR04 Ultrasonic Test Board – LC Ultrasonic Ranging Display Module with STM8S103 MCU
The LC Ultrasonic Ranging Display Module is a compact, feature-rich board designed for testing and demonstrating the performance of the HC-SR04 ultrasonic sensor. Featuring an onboard STM8S103 microcontroller, it provides real-time distance measurement with output via LED display or serial interface.
Key Features
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Onboard STM8S103 MCU – Reliable 8-bit microcontroller from STMicroelectronics
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Real-Time Distance Display – Data output via digital LED display or serial communication
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Compatible with HC-SR04 – Simply plug in your ultrasonic sensor to start measuring
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Wide Measurement Range – Measures distances from 3cm to 400cm
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High Accuracy – Maximum error of approximately 1%
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Built-in Serial Output – Easily interface with a PC via USB-to-TTL converter
Specifications
| Parameter | Value |
|---|---|
| Measurement Range | 3cm – 400cm |
| Accuracy | ±1% |
| Unit Displayed | Centimeters (cm) |
| Working Voltage | 5V DC |
| Baud Rate | 9600bps |
| Output Format | "D: XXX\r\n" where XXX = measured distance |
| Board Dimensions | 60mm × 42mm |
Interface Description
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VCC / GND: Power supply (5V DC)
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TX / RX: Serial port output/input for data transmission
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NRST / SWIM: Reserved for STM8 firmware programming
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2.54mm Socket: Alternate 5V power input
Usage Instructions
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Connect HC-SR04 sensor to the board.
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Power the board via VCC and GND (5V).
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View the measured distance directly on the LED display.
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For serial output:
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Connect TX, RX, GND of the board to a USB-to-TTL converter.
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Set terminal baud rate to 9600 bps.
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Receive serial data in format:
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