Microwave Sensor RCWL-0516 Bouncing Question

Newbie here. I’m using an RCWL-0516 with a D1 Mini through Home Assistant to trigger a light on when someone enters a room. The issue I am having it just keeps bouncing from Detected to Clear every few seconds. This is the 2nd one I’ve tried with the same issue, the first one was with an ESP32. I know I must be doing something wrong or maybe there’s something I need to add? Here is the ESPHome code that I uploaded to the D1 Mini. Thank you.

  name: mw_sensor01
  platform: ESP8266
  board: d1_mini

  ssid: "XXXX"
  password: "XXXXXX"

  # Enable fallback hotspot (captive portal) in case wifi connection fails
    ssid: "Mw Sensor01 Fallback Hotspot"
    password: "kta0sKXAWsgS"


# Enable logging

# Enable Home Assistant API


  - platform: gpio
    pin: D4
    name: "Kitchen Sensor"
    device_class: motion
      #- delayed_on_off: 4000ms

Is it just the nature of that sensor or perhaps EMI?

If you lay the sensor facing flat down on a table, does it turn on?

Some see behind as well. Maybe test between two metal baking trays.

It helps to know if you are dealing with a placement problem or an interference problem.

Yep, these sensors can be very sensitive and even penetrate walls.

This article explains how you can modify the range and trigger length: RCWL-0516 microwave radar motion detector • Wolles Elektronikkiste

Check this:

Using the resistor and capacitor solved the problem for me.

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#i am using an esp8266 nodeMCU and i ended up having to use gpio16 with a pulldown command


  - platform: gpio


      number: 16

      mode: INPUT_PULLDOWN

    name: "Home Multisensor Motion"

    device_class: motion
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