Using a D1 mini to go to deep sleep and wake up when motion is detected. On boot a message is sent via MQTT to node-red.Read More
I was looking for a transformer from 230v to 5v. Although I found multiple options, the price per unit seemed a little too expensive about €3.00. While that does not look too expensive per unit, remember we also need a switch and an ESP module for WiFi connectivity. So, as an alternative I looked into these Sonoff devices.