HY-SRF05 Ultrasonic Distance & Ranging Sensor Module
Upgraded 5-Pin Sonar Ranging for Precision Distance Detection
Upgrade from basic pulse-timing sonar with the KS103 Smart Ultrasonic Distance Sensor. Engineered for high-accuracy industrial automation, drone altitude tracking, and advanced robotics, the KS103 features an onboard microprocessor that handles signal filtering, echo calculation, and environmental calibration directly on the module.
Unlike entry-level sonar sensors (such as the HC-SR04 or HY-SRF05) that require microcontrollers to measure microsecond pulse widths, the KS103 calculates distance internally and streams clean, millimetric readings directly via I2C or TTL Serial (UART). With built-in temperature compensation and an expanded measurement envelope (1 cm to 800cm), the KS103 delivers consistent, drift-free precision under changing atmospheric conditions.
Key Features & Advantages
High-Precision $1\text{ mm}$ Resolution: Detects micro-level changes in target position with an effective accuracy margin of $\pm 1\text{ mm}$.
Extended Range (1cm to 8m): Industry-leading range envelope featuring an ultra-narrow 1m blind spot and stable tracking up to 8 meters.
Onboard Temperature Auto-Correction: Integrated thermal sensor dynamically recalibrates speed-of-sound calculations to eliminate distance drift in hot or cold environments.
I2C & UART Bus Interfaces: Offloads heavy mathematical processing from host controllers. Supports daisy-chaining up to 127 sensors on a single two-wire I2C bus.
Multi-Platform Automation Ready: Native digital communication makes setup seamless across Arduino, ESP32, ESP8266, STM32, Raspberry Pi, and Single-Board Computers (SBCs).
Target Applications
Drone & UAV Altitude Control: Pinpoint ground distance monitoring for smooth auto-landing and low-altitude hovering.
Precision Liquid Level Sensing: Non-contact fluid volume tracking in industrial tanks, silos, and water management stations.
Multi-Sensor Robotic Mapping: Connect arrayed sensors on a single I2C bus line for 360 degree environmental mapping without running out of GPIO pins.
Technical Specifications
| Parameter | Specification |
| Operating Voltage | 3.0V – 5.5V DC |
| Operating Current | 1.6mA (Sleep) / 10mA (Active) |
| Communication Protocols | I2C Bus (400 kHz} / TTL Serial UART |
| Detection Range | 1cm – 800cm (0.01m – 8.0m) |
| Measurement Resolution | 1mm ($0.1cm) |
| Temperature Compensation | Onboard internal sensor (Automatic -40 degree C to +85 degree C correction) |
| I2C Bus Bus Capacity | Up to 127 addressable device IDs |