HC-SR501 PIR Motion Sensor Module

GY-521 module featuring the MPU6050 accelerometer and gyroscope for motion-sensing and orientation projects.

Two-wire temperature sensor with a 1-metre lead. The listing mentions both PT100 and K-type; confirm the sensor type before selecting an interface.

FC-28 Soil Moisture Module 3.3-5 V DC. An electronic module identified by its model and function.

Infrared Receiver LED 3mm 2-PIN. An infrared receiver for compatible remote-control signals.