HFS-DC06 Microwave Radar Motion Sensor Module (5.8GHz Doppler)

Specifications

• Model: HFS-DC06.

• Frequency: 5.8GHz ±75MHz (ISM Band).

• Input Voltage: 5V DC.

• Output Signal: 5V TTL High Level (Active High).

• Sensing Distance: 3 to 12 Meters (Adjustable via onboard potentiometer).

• Delay Time: Adjustable (Approx 2s to 120s).

• Transmission Power: <2mW (Safe for human exposure).

• Detection Angle: 360° (Forward hemisphere).

• Dimensions: 39mm x 22mm x 11mm.

Key Applications & Projects

• Hidden Security: Mount the sensor inside a door frame or wall to detect intruders before they even enter the room.

• Smart Mirrors: Activate the mirror display only when someone stands in front of it (works through the glass).

• Automated Lighting: Turn on garage or hallway lights automatically without visible sensors.

• Industrial Safety: Detect workers approaching dangerous machinery zones through protective plastic guards.

Project Evolution

• The Bottleneck: PIR sensors fail in hot environments (like garages in summer) because they rely on temperature differences.

• The Upgrade: The HFS-DC06 relies on movement, not heat. It works perfectly in hot warehouses, bathrooms, or outdoors (inside a waterproof box), giving you 24/7 reliability regardless of the weather.

• Effort Level: Beginner. Connect VCC, GND, and OUT. Adjust the two potentiometers on the back for sensitivity and time delay.

Virtual Technician & Setup Guide

• ⚠️ Interference: Do not place metal objects directly in front of the sensor face, as metal blocks radio waves.

• Tuning: There are two small potentiometers on the back:

  • Time: Adjusts how long the output stays HIGH after motion stops.

  • Distance: Adjusts the sensitivity/range.

• Orientation: The flat antenna side (with the chip) should face the detection area.

Accessories & Compatibility

• Included: 1x HFS-DC06 Module.

• Required: 5V Power Source, Microcontroller (Arduino/ESP) or Relay Module.

Helpful Tutorials & Resources

• Tutorials 

Frequently Asked Questions (Technical SEO)

• Does this sensor work through walls? Yes, it can detect motion through non-conductive materials like drywalls, wood, glass, and plastic housings. It cannot see through metal or thick concrete.
• What is the difference between this and a PIR sensor? PIR detects heat (infrared) and requires a line of sight. This Radar sensor detects movement (Doppler shift) and works through obstacles and in high-heat environments.
• Is the 5.8GHz frequency safe? Yes, the transmission power is very low (<2mW), which is significantly lower than a standard Wi-Fi router or mobile phone.
• Can I use it with an Arduino? Yes, the output is a standard 5V digital logic signal. You can connect the OUT pin directly to any Arduino Digital Input pin.
• Does it work with ESP32 (3.3V)? The output is 5V. You should use a voltage divider or level shifter to step the 5V signal down to 3.3V to protect your ESP32.
• Will Wi-Fi interfere with it? The 5.8GHz frequency is less crowded than 2.4GHz, but strong 5GHz Wi-Fi routers nearby might cause occasional interference. Keep it at least 1 meter away from routers.
• How do I adjust the range? There is a potentiometer on the back labeled for sensitivity/distance. Turning it changes the detection range from roughly 3 meters up to 12 meters.
• Can I use it outdoors? Yes, since it works through plastic, you can seal it inside a waterproof plastic box. It is not affected by sunlight or wind like PIR sensors are.
• What is the "Blind Time" after detection? After the output goes LOW, there is usually a short 1-2 second "blind" period where it won't trigger again immediately.
• Does it detect stationary people? No, it is a Doppler sensor. It only detects motion. If a person stands perfectly still, the sensor will report "No Motion."
• Can two sensors interfere with each other? Yes, if placed too close, their waves can cross-talk. It is recommended to space them at least 2-3 meters apart.
• Why does it trigger falsely when no one is there? This can happen if the sensitivity is too high (detecting movement through a wall in the next room) or if the power supply is noisy. Use a clean DC source.
• Is there a library required? No library is needed. It acts as a simple digital switch. digitalRead(pin) is all you need.
• What is the current consumption? It typically consumes around 30-40mA, making it suitable for mains-powered devices but slightly hungry for small battery projects.
• Can it detect pets? Yes, it is very sensitive and will detect dogs or cats. You may need to lower the sensitivity to ignore smaller movements.
• Is it better than RCWL-0516? Generally, yes. The HFS-DC06 (5.8GHz) is more stable and less prone to random false triggers than the cheaper RCWL-0516 (3GHz).
• Does the orientation matter? Yes, the antenna radiates in a specific pattern (mostly forward). Point the component side towards the area you want to monitor.
• Can I use it to switch a light directly? No, the output pin provides a weak signal (a few mA). You must use a Relay Module or MOSFET to drive high-power loads like lights.
• Does it work in the dark? Yes, radar waves work perfectly in complete darkness.
• Can I cover it with metal? No, metal blocks radio waves. You cannot mount this inside a metal box; use plastic or wood enclosures.