ESPray
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The original was posted on /r/homeassistant by /u/t0m1o1 on 2025-03-13 18:07:36+00:00.

Quick and dirty modded airfreshner to let me control it from HA. ESP32C3 and a MOSFET. MOSFET grounds the “boost” button for 0.5 seconds when activated causing it to spray. All fits back in the original case and is currently running from the 2 AA batteries inside which is suboptimal - it browns out when activated and rough calculations say it’ll probably only last a week on fresh batteries. Probably be running the ESP from usb going forward.