Interested in taking a crack at improving the classic smoke alarm ... the test system is simply a NodeMCU connected to a buzzer and a MQ2 gas sensor. So how does it work? If the detector goes ...

When smoke particles disrupt the light beam, the sensor sets off the alarm. Smoldering fires can ... using a wiring system like Romex. They do have an advantage over traditional battery-operated ...

This detector also features nightly sensor ... it detects smoke or carbon monoxide in your home. With Z-Wave compatibility, ...