5.8GHz Microwave Radar Module

The DFRobot 5.8 GHz microwave radar module transmits electromagnetic waves and detects from the difference to the reflected wave whether something is moving in the detection area. Unlike a PIR sensor, it also detects small movements such as breathing and thus recognises people who are sitting or sleeping. Range (up to 11 m), sensitivity and delay times are set via UART, and the result is available via UART and as a high or low level on an output.

Recommended Accessories:

• Dupont Cable M-F 20cm 20 Pieces

Features:

• 5.8 GHz microwave radar, FMCW and CW modulation
• Also detects stationary people by small movements such as breathing
• Range adjustable from 0 to 11 m (factory 6 m)
• Sensitivity adjustable from 0 to 9 (factory 7)
• Adjustable switch-on and release delay
• Output O with selectable polarity, plus UART
• Ceiling or wall mounting

Application Examples:

• Presence-dependent lighting
• Security and alarm technology
• Household appliances and home automation
• Hotels, garages and building technology

Documentation:

• DFRobot Wiki SEN0521
• Commands, mounting and detection area (DFRobot Wiki)
• Datasheet (PDF)
• Arduino library on GitHub (linked in the DFRobot Wiki)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: SEN0521
• Frequency: 5.8 GHz
• Modulation: FMCW, CW
• Equivalent transmit power: 3 to 5 dBm
• Range: up to 11 m
• Beam angle: 120° × 120°
• Operating voltage: 4.5 V to 5.5 V
• Operating current: 22 mA
• Interface: UART, 115200 baud
• Connections: R (RX), T (TX), O (output), - (GND), + (VCC)
• Operating temperature: -40 °C to 85 °C
• Dimensions: 20 × 18 × 2.5 mm
• Weight: 5 g

Scope of Delivery:

• 1× 5.8 GHz microwave radar module
• 1× pin header 5-pin