The Rd-04 Module from Ai Thinker is a high sensitivity 10GHz human presence sensing module. Radar signal processing and accurate human body sensing algorithms allow a high level of sensitivity when detecting bodies that are either in motion or stationary – a big step up from your standard PIR sensors. Approximate distance to the target can also be calculated using the data received from the radar sensor. Reaching up to a maximum sensing distance of 6.5 meters, this sensor is primarily used indoors to output results in real-time.
Features / Specs
- Manufacturer: Ai-Thinker
- Model: Rd-04
- Radar Chip: Phosense XBR818
- Frequency Band: 10.275 – 10.775GHz (Complies with FCC and CE Certification Standards)
- Center Frequency: 10.525GHz
- Sensing Distance (Max): 6.5 Meters
- Sensing Angle: ± 50 Degrees
- Operating Voltage Range: 3.0 – 3.6VDC (≥ 100mA)
- Output and Logic Level Voltage: 3.3VDC
- Operating Current (@ 3.3V; 25°C): Constant Power Supply Mode: ~16mA / Pulse Power Supply Mode: ~110µA
- Operating Temperature Range: -40°C to +85°C
- Communication Protocol: I2C
- Antenna: PCB Antenna
- Header Pin Pitch: 2.0mm
- Dimensions: ~(15mm x 15mm)
Pin Description
- IIC_EN-> Digital input used to enable or disable I2C for low power consumption
- VIN-> Supply Voltage (3.0 – 3.6VDC)
- GND-> Ground
- OUT-> Digital output of detection result (HIGH if human body is detected, otherwise LOW)
- SCL-> I2C Clock Input
- SDA-> I2C Data Pin