Using a PIR sensor, motion of persons or pets can be detected. The inexpensive HC-SR501 (and clones) is worth the price, but without modification a 5V signal is required. To make it work with ESP8266 / ESP32 3.3V would be much better. With a slight modification 3.3V can be used as input voltage and the…
Tag: sensor
Display Arduino sensor data using Grafana
Collecting and display sensor data can be fun and helpful. Wouldn’t it be interesting to know the average temperature of last month based on sensor data collected using Arduino, MQTT and a time series database? Ever wanted to know the postman’s show-up times for making future predictions? At Maker Faire Hannover 2017 I presented a demo…