8pcs Microwave Radar Sensor RCWL-0516 Switch Module Human Board Induction Board Detector 5-7M Detection Distance 4-28V Compatible with Arduino Raspberry PI,Human Rat Cat Detector

Super easy to use, but after trying to get an analog signal from the onboard chip it became apparent that you cannot use this to do radar imaging and you cannot detect distance/speed like true doppler.Still works great as a motion detection module and you can customize the deadtime with resistors or by adding a potentiometer to tune it on the fly.

For a fully functioning radar module, youre going to have to spend many hours trying to tweak this module. If you dont have any resistors, might want to consider purchasing...otherwise the sensitivity is all over. When you also consider its non-directional, (360degrees) be prepared to get out the tin foil to limit detection directions.A better design would have included the resistors and capacitors need to change sensitivity, and then change with jumpers or solder pads.Wish I could say this was the answer.. But it's not- I have more accurate PIR sensors.

Good detection rate. Easy to use for your project

Of all the sensors and boards that I've purchased on Amazon, this is the first which didn't even cut the boards into individual pieces. Maybe instead of using pictures of individual boards, use photos of the single block that you ship to customers. So far, I dont have high hopes for the quality of operation.

I built an Arduino-based temperature/humidity/pressure monitoring system for my radio shack. I used an OLED display, and they will eventually burn up if they are left "lit" all the time. So I added this device to sense my presence, wake up the Nano, and display the information for a limited amount of time. It saves energy, greatly increases the display's life, and works like a charm.Great little device.

The price is right, worked OK with an ESP32 CPU and ESPHome firmware, to act as reliable occupancy/presence sensor. Using these outside (at a weather-protected doorway) to sense people near my doorway; and indoors to sense people sitting with only slight motion in front of the TV (PIR sensors were giving me too many false positives outside, and failing for indoor seated people). Still needs some "tuning" of the ESPHome software (or maybe I'll need to add a Lambda filter) to "de-bounce" the occupancy triggers.

Every single board had resistors and caps destroyed on it. And some the IC on the back was broken off. Only got one working board. I recommend not using this brand

Control purchase.We tested this small vicinity sensor for the project for mid school electronics club. Assembled night light turning on when human passes it. The toy is working and activated by the human body from the distance 5-6 meters. Quite impressive.Runs from a single Li Ion batter and small efficient DC converter increasing voltage to 8.3 V DC. It was required by explored in the experiment 8V bright white LED. We completely satisfied with this small beast and have many plans to explore it further.Many thanks to developers!