IoT-Based Door Security Alarm System Using Pico W and Telegram Let’s learn how to build a smart and reliable door alarm using an IR sensor and Pico W. When movement is detected at the door, the Pico W will instantly send an alarm notification to your device through Telegram, keeping you informed and your home safe. Join us and take the first step towards enhancing your home security with this easy-to-follow IoT project. 📶📲 📄 Tutorial: https://my.cytron.io/tutorial/iot-based-door-security-alar