The price difference can vary wildly by region, but €10 is still super cheap compared to a dedicated presence sensor!

Regarding the chip recommendation, it’s a classic trade-off:

ESP32-S3: This is what I mainly recommend today. It gives you more raw processing power (dual-core), which is great for managing the OS, MQTT, and the CSI analysis without hiccups.

ESP32-C6: I just ordered a C6 myself to run extensive tests! The C6 might have a superior quality Wi-Fi module and better internal CSI extraction capabilities due to hardware improvements.