Hands-on Raspberry Pi home monitoring: DS18B20, DHT11, ESP32-C3 over HC-12, CT-clamp energy metering, and migrating off RRDtool. Built and measured on real hardware.
Why I moved my outdoor ESP32-C3 sensor nodes off WiFi and onto HC-12 433 MHz serial radio, the settings that mattered, and the failure modes nobody warns you about.