06-21-2026, 09:42 AM
Share what you're currently tinkering with. Doesn't matter if it's half-finished or a mess - that's how these things go.
I've been building a soil moisture monitoring system for a small greenhouse. ESP32 with a capacitive soil sensor (resistive ones corrode too fast), reading every 15 minutes and pushing data to a small SQLite database on a Pi Zero over MQTT. Simple web dashboard with Chart.js to plot trends over time.
Had a fun bug where the ESP was deep sleeping between readings, which I expected to save power - but the capacitive sensor needs a warm-up period after power-on or the readings are way off. Added a 500ms delay after enabling the sensor power pin and it became rock solid.
What are you building?
I've been building a soil moisture monitoring system for a small greenhouse. ESP32 with a capacitive soil sensor (resistive ones corrode too fast), reading every 15 minutes and pushing data to a small SQLite database on a Pi Zero over MQTT. Simple web dashboard with Chart.js to plot trends over time.
Had a fun bug where the ESP was deep sleeping between readings, which I expected to save power - but the capacitive sensor needs a warm-up period after power-on or the readings are way off. Added a 500ms delay after enabling the sensor power pin and it became rock solid.
What are you building?