Using Bluetooth on a desktop computer is now such a seamless process; it’s something built-in and just works. Behind that ubiquity is a protocol layer called HCI, or Host Controller Interface, a set ...
There is a scene from the movie RED (Retired, Extremely Dangerous) where Bruce Willis encounters a highly-secure door with a constantly changing lock code deep inside the CIA. Knowing the lock would ...
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You, too, can make this stylish ESP32 air quality monitor with an e-ink display, and it looks stylish to boot
This ESP32-powered e-ink air quality monitor measures temperature, humidity, CO₂ levels, and VOCs. It uses a custom PCB (ESP32-C3) and a 3.7" e-paper display. The full bill of materials, firmware, and ...
Update 3/9/25: After receiving concerns about the use of the term 'backdoor' to refer to these undocumented commands, we have updated our title and story. Our original story can be found here. The ...
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