Presence Radar Direction Scanner

This project uses an Arduino Uno, a continuous rotation servo, and an ME73MS01 mmWave presence sensor to build a rotating human-presence scanner. Instead of measuring distance, the system records whether a target is detected at each estimated angle and highlights recent active directions in a browser view.

The live version runs locally with Flask because the browser must read serial data from the Arduino on COM8. The public page documents the hardware, data format, and current visualization behavior.

Open Local Viewer View Flask App

COM8Arduino serial port

D8Presence output input

D9Servo signal pin

9600Serial baud rate

Current Wiring

ME73MS01 VCCArduino 5V or required module voltage

ME73MS01 GNDArduino GND

ME73MS01 OUTPUTArduino D8

Servo signalArduino D9

Servo power5V supply, common GND

Data Format

The Arduino sends one line per scan step. The Flask app parses these lines and draws the active directions.

angle,presence
0,1
2,1
4,0
6,0

Local Run Flow

cd E:\GitHub\Ley1Wang_Web.github.io\radar_app
python app.py

# then open
http://127.0.0.1:5000

Arduino Logic

const int presencePin = 8;
int raw = digitalRead(presencePin);
presence = raw == HIGH ? 1 : 0;

Serial.print(angle);
Serial.print(",");
Serial.println(presence);

Build Notes

The ME73MS01 output line is used as a simple target-present signal. The live radar view does not claim distance measurement; it visualizes the recent directions where the sensor output was active while the servo platform rotates.