Alternative implementations for a door sensor - doorbell indicator
Product used : Xiaomi Mijia Smart Door & Window Sensor, but any door sensor will do I wanted to know when some one rings my doorbell to notify me when I cannot hear the doorbell, when I am in the garden for example. In combination with a webcam I can see who is at the door when I am not at home. I know that there are products on the market that can fix this, most of them are not visual appealing, are expensive, and/or requires you to pay a monthly subscription. I think my doorbell looks fine, so I do not want to change this, and to be honest: it is more fun to make something yourself! The model of doorbell I use works with two magnetic coils which actuates a metal rod which then hits the bell. Magnetic coils can also activate reed switches because they are magnetic, so let's try that! I taped a door sensor next to one of the two magnet coils to see if it will work. After some moving the sensor around and ringing the doorbell I found the best spot. I marked it and glued it to