Detect human presence behind doors and walls with Telegram Notification - DFRobot SEN0395 and ESP32C

Sometimes you need to know what is going on outside your door. Of course you can install a PIR sensor or HCSR04 distance sensor with cables and all but, wouldn't be cool to use an indoor Milimiter Wave Radar sensor instead? This mm wave alarm is able to detect persons behind walls or doors and notify by Telegram.

ESP32C3 https://www.dfrobot.com/product-2566.html?tracking=61357a929f73e
MM Wave Radar https://www.dfrobot.com/product-2282.html?tracking=61357a929f73e

https://cults3d.com/en/3d-model/gadget/mm-wave-radar-alarm

Connect the Wave radar to 3.3v, GND and TX to GPIO5 and RX to GPIO7

#include <DFRobot_mmWave_Radar.h> #include <UniversalTelegramBot.h>

#define BOT_TOKEN ":" #define WIFI_SSID "" #define WIFI_PASSWORD "" String chat_id=""; String test_photo_url = ""; int LED_BLINK = 10; int howManyMeters=2; // until 9 int loopDelay=1000; int alarmDelay=10000; int lastStateWasClear=1;

If you need to customize this project or to create a new one for specific electronics you are welcome to contact me @RoniBandini bandini.medium.com