Learn to set up and automate wildcard SSL certificates using Let's Encrypt's DNS-01 challenge for Home Assistant and all its sub-domain add-ons. Secure remote access, eliminate certificate warnings, and ensure seamless communication across your smart home ecosystem with this step-by-step guide and practical configurations.

Learn how to integrate high-precision RS485 Modbus industrial sensors into Home Assistant using an ESPHome-powered ESP32 gateway. Get step-by-step instructions, YAML configurations, troubleshooting tips, and real-world automation examples for reliable environmental monitoring.