[ladyada] has a freshly-published and amazingly thorough tutorial on passive infrared (PIR) motion sensors. Most often seen in security floodlights and automatic doors, in creative hands these sensors ...

In this tutorial we will use a Passive Infra-Red (PIR) sensor as an input to trigger a LED. A PIR sensor works by detecting heat as an object passes by it. Plug the micro: bit into the GPIO shield.

Tutorial 1: ESP8266 with DHT11 Temperature and Humidity Sensor using Arduino IDE---https://microdigisoft.com/esp8266-with-dht11-temperature-and-humidity-sensor-using ...

This section defines the network credentials and server details required for sending the email. The ESP32-CAM connects to WiFi using the SSID and password. The host address, HTTPS port (443), and API ...

As radar technology continues to advance, it offers an increasingly broad range of capabilities, making it a viable alternative to traditional passive infrared (PIR) sensors. With radar’s enhanced ...

Abstract: Passive Infrared (PIR) sensors are commonly used in indoor applications to detect human presence. PIR sensors detect human presence by detecting the change in infrared radiation across the ...