Description

RCWL-0516 Microwave Radar Sensor Module for Motion Detection

The RCWL-0516 Microwave Radar Sensor Module is a compact Doppler radar motion sensor designed for human movement detection, smart home automation and embedded applications.

Unlike traditional PIR infrared sensors, the RCWL-0516 uses microwave radar technology to detect motion and provides reliable performance in different environmental conditions.

This product page includes three popular versions with different sensing distances:

Choose the suitable version according to your project requirements.

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Key Features

Microwave Doppler Radar Technology

The RCWL-0516 adopts microwave Doppler radar sensing technology.

Compared with traditional PIR sensors:

✔ Not dependent on infrared radiation

✔ Less affected by ambient temperature

✔ Suitable for indoor motion detection

✔ Compact and easy to integrate

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Multiple Detection Distance Options

Different versions provide different sensing ranges:

Standard Version

Detection distance:

5-8 meters

Suitable for:

• Arduino projects
• Automatic lighting
• DIY electronics

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2022 Version

Detection distance:

6-12 meters

Suitable for:

• Larger rooms
• Smart home applications
• Security monitoring

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RCWL-0516+ Upgrade Version

Detection distance:

Up to 15 meters

Suitable for:

• Long-range motion detection
• Industrial automation
• Advanced IoT projects

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Wide Voltage Compatibility

The RCWL-0516 supports:

4V-28V DC input voltage

Compatible with:

• Arduino UNO
• ESP32
• ESP8266
• STM32
• Raspberry Pi

The module provides a 3.3V logic output signal, making it easy to connect with microcontrollers.

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Technical Specifications

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Pin Definition

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How RCWL-0516 Works

The sensor continuously emits microwave signals.

When a moving object enters the detection area:

1. Microwave signals are reflected back.
2. The Doppler frequency changes.
3. Internal processing circuit detects movement.
4. OUT pin outputs a high-level signal.

The connected controller can then trigger lights, alarms or automation devices.

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Applications

Smart Home Automation

Perfect for:

• Automatic lighting systems
• Smart switches
• Energy-saving devices

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Security Systems

Used for:

• Human movement detection
• Indoor security alarms
• Access monitoring

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Arduino & IoT Projects

Compatible with:

• Arduino
• ESP32
• STM32

Popular DIY projects:

• Motion activated lamp
• Smart room monitoring
• Automatic control systems

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RCWL-0516 vs PIR Sensor

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Why Choose Fondyes RCWL-0516?

✔ Microwave Doppler radar technology

✔ Multiple distance versions available

✔ Up to 15M detection range

✔ Wide 4V-28V voltage input

✔ Compact PCB design

✔ Compatible with Arduino and IoT platforms

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Package Includes

Option 1:

1 × RCWL-0516 Standard Version (5-8M)

Option 2:

1 × RCWL-0516 2022 Version (6-12M)

Option 3:

1 × RCWL-0516+ Upgrade Version (15M)

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Learn More

Arduino Development Boards

Build motion detection projects with Arduino controllers.

https://www.youtube.com/watch?v=IJoPkKlxFXA

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FAQ

Q1: What is RCWL-0516 Microwave Radar Sensor Module used for?

The RCWL-0516 Microwave Radar Sensor Module is designed for detecting human movement and object motion using Doppler radar technology.

It is commonly used in:

• Smart lighting systems
• Automatic switches
• Security alarms
• Arduino projects
• IoT motion detection applications

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Q2: What is the detection distance of RCWL-0516?

The detection distance depends on the selected version:

• Standard Version: approximately 5-8 meters
• 2022 Version: approximately 6-12 meters
• RCWL-0516+ Upgrade Version: up to 15 meters

Actual detection distance may vary depending on installation environment, object movement and surrounding conditions.

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Q3: Can RCWL-0516 work with Arduino and ESP32?

Yes. The RCWL-0516 provides a digital output signal and can be connected with popular development platforms including:

• Arduino UNO
• Arduino Mega
• ESP32
• ESP8266
• STM32

It is suitable for DIY electronics, robotics and IoT sensor projects.

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Q4: What is the difference between RCWL-0516 and PIR motion sensors?

The RCWL-0516 uses microwave radar technology, while PIR sensors detect infrared radiation from human bodies.

Compared with PIR sensors, RCWL-0516 features:

✔ Less affected by temperature changes

✔ Faster response to moving objects

✔ Possible detection through some non-metallic materials

✔ Wider detection area

However, PIR sensors may be preferred for applications requiring precise human heat detection.

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5. Does RCWL-0516 detect stationary people?

The RCWL-0516 mainly detects movement, not completely stationary objects.

When a person remains still for a long time, the sensor may stop triggering because there is little or no Doppler frequency change.

For continuous human presence detection, additional processing or specialized presence sensors may be required.

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6. What should be considered when installing RCWL-0516?

For best performance:

✔ Avoid installing behind metal materials

✔ Keep away from strong electromagnetic interference sources

✔ Adjust installation angle according to the detection area

✔ Test the sensing distance in the actual environment

Proper installation can help achieve more stable motion detection performance.