The DHT11 Digital Temperature and Humidity Sensor is a compact and economical sensor for measuring temperature and relative humidity. It provides calibrated digital output through a single data pin, making it easy to connect with Arduino and other microcontrollers. With low power consumption, good stability, and simple operation, it is ideal for IoT, weather monitoring, home automation, and DIY electronics projects.

The Infrared Obstacle Avoidance IR Sensor Module is a compact sensor for detecting nearby objects using reflected infrared light. It operates from 3.3–5 V and provides an active-low digital output through its 3-pin interface. The detection range can be adjusted from approximately 2 cm to 80 cm using the onboard preset. It also features an indicator LED and is ideal for Arduino, ESP32, robotics, obstacle avoidance, and automation projects.