Magnetic Contact Switch Door/Window Sensor push button module This SIM800 Module from Elecrow

This SIM800 Module from Elecrow is a quad-band GSM/GPRS module that supports GSM frequencies 850MHz

This board is so sturdy that it could do what an Arduino Uno can

You get 1 pair

with a weight of 100

We have already developed a variety of shields for 1Sheeld like LED

Magnetic Contact Switch Door/Window Sensor push button module This SIM800 Module from ElecrowDetect Nearby Objects Without Contact The Magnetic contact switch door sensor is a button or switch input module designed for obstacle detection, touchless triggers, object counting, and simple automation. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds. Key details include Rated voltage: 200 VDC max; Interface: Digital GPIO; Box size (each side): 29mm x 14mm x 9mm 1. 1" x 0. 6" x 0. 4". Why