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RCWL- 0516 Microwave Radar

RCWL- 0516 Microwave Radar

RCWL-0516 is a doppler radar microwave motion sensor module that can act as an alternative to a PIR motion sensor. This git repository is an attempt to collect the rather scant information on this board in one place.

Adjustment Part Introduction:
1. C-TM
Adjust repeat trigger time, default trigger time is 2s; increasing the capacitor's capacity will make repeat trigger time longer, and actual counting trigger time can operate as below:
Stick capacitor on C-TM, test 9196 3-pin frequency F, repeat trigger time T=(1/f)*32768

2. R-GN
Detection distance adjustment; connect with resistor and detection distance will become shorter; if not connected, detection distance is 7m; if connect with 1M ohm resistor, detection distance is 5m

3. R-CDS
Internal VCC parallel connect with internal 1M ohm resistor to CDS pin (that is 196 9-pin) by R-CDS, CDS connects with the photoresistor, you can close detection function at night

Pin Definition:
1. 3V3: 3V3 power output
2. GND: ground
3. OUT: control output; when detecting moving objects, it will output high level
4. VIN: input voltage, 4-28V
5. CDS: enable control chip, lower than 0.7V, OUT will output low level all the time


  • Working voltage: 4.0-28.0V
  • Operating Current: 2.8mA (typical); 3mA (max)
  • Detection Distance: 5-9m
  • Transmitting Power: 20mW (typical); 30mW (max)
  • Output Voltage: 3.2-3.4V
  • Output Voltage Driving Capacity: 100mA
  • Trigger Way: repeat trigger
  • Output Control Low Level: 0V
  • Output Control High Level: 3.3V
  • Operating Temperature: -20~80 ℃
  • Package List:

  • 1 x RCWL- 0516 Microwave Radar
  • Useful Links:

  • Datasheet
  • Github
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    • Product Code: MSM0516MR
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