I have a 9VDC battery powered smoke alarm in my workshop and while you can hear it when it goes off in the workshop, you can’t hear it from upstairs or when nobody is at home. So I decided to retrofit an esp8266-01 to the smoke alarm to make it WiFi enabled so that it notifies me via SMS and email if the alarm goes off.… Read more
WiFi Enabled Battery Smoke Alarm
Reply
Below is the dynamic data plot from the temperature logger in my workshop. The temperature logger uses a low cost Chinese sourced esp8266 D1 board and measures temperature and humidity every 5 seconds using a DHT11 sensor. Readings are sent to this site’s web server and stored in a MySQL database.…