ESP32: control a relay module for switching higher-voltage loads
Use a relay module with an ESP32 to switch mains-powered devices. The hardware safety boundaries and why opto-isolated modules matter.
Tag
#mains
3 tutorials
ESP32: mains power with the HLK-PM01 isolated supply
Use the HLK-PM01 isolated mains-to-5V module to power an ESP32 from a wall outlet. The safer alternative to wiring a 5V phone charger inline.
Arduino: control relays for home automation
Drive a relay module from an Arduino to switch mains-powered devices. The most common home automation building block, with all the safety stuff included.