Cute CO2 Gauge Tells You When To Crack A Window

[Cyrill] has a good home automation scheme going: there are a number of physical switches set around the place that control the essential functions. The only problem is that in the winter time, thi…

Hackaday Prize 2023: Bluetooth Spell To Speak

Have you ever known what you wanted to say but couldn’t figure out exactly how to say it? For some individuals, that’s all the time. The gap between intention and action can be a massiv…

Go In All The Directions With Omniwheeled ESP32 Bot

The ability to change direction without turning is the specialty of omnidirectional wheels, which [maker.moekoe] used to their full potential on a pair of ESP32-controlled robots. Video after the b…

Bee Motion Combines ESP32 With PIR Sensor And USB-C

There’s no shortage of ESP32 development boards out there, with many of them offering some “killer app” feature which may or may not align with whatever it is you’re trying …

Versatile Reflow Oven Controller Uses ESP32-S2

[Maker.Moekoe] wanted a single controller board that was usable with different reflow ovens or hotplates. The result is a versatile board based on the ESP32-S2. You can see a video of the board&#82…