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I built an ESP32-powered presence sensor using only Bluetooth, here's how it works

For smart home deployments, there are a lot of ways to track the presence of individuals in a room. There are motion detection sensors that use mmWave and PIR, and you can also use simple detection ...
Hackaday1y

Your ESP32 As A USB Bluetooth Dongle

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 ...
CNX Software6d

ESP32-H2-Zero mini Zigbee, Thread, and BLE USB-C board is based on ESP32-H2 RISC-V SoC

Waveshare ESP32-H2-Zero is a tiny USB-C development board based on Espressif Systems' ESP32-H2 RISC-V SoC with Zigbee, Thread ...
Bleeping Computer6mon

Undocumented commands found in Bluetooth chip used by a billion devices

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 ...
heise online6mon

Undocumented commands tear security hole in ESP32 Bluetooth

The cheap WLAN and Bluetooth chips from the manufacturer Espressif, ESP32, contain undocumented commands in the Bluetooth hardware communication in current firmware versions. This opens up a security ...
KTLA6mon

Hidden Bluetooth commands found in a billion devices

Researchers have found undocumented commands in a popular bluetooth chip which is inside over a billion devices worldwide. The secret commands are in the ESP32 chip, which is made by Espressif. The ...