AHAHAHAH. The author took a cheap $1.50 door alarm and added an ESP8266 to it to make it wireless. Clever idea overall
http://www.instructables.com/id/4-WiFi-Door-Alarm-Using-a-ESP8266-IoT/
AHAHAHAH. The author took a cheap $1.50 door alarm and added an ESP8266 to it to make it wireless. Clever idea overall
http://www.instructables.com/id/4-WiFi-Door-Alarm-Using-a-ESP8266-IoT/