Typically associated with circuitry projects and real-time operating systems, microcontrollers are great for tinkerers who prefer working with embedded devices. But unlike their SBC counterparts, you ...

Espressif’s popular ESP32 microchip, found in over a billion devices, has been caught with its digital trousers down, thanks to an undocumented "backdoor" lurking in its Bluetooth firmware. For those ...

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 ...

A real-time mirrored heads-up display (HUD) for vehicles, built with Android and ESP32. This app uses GPS data from your phone and sends live speed updates over Bluetooth to an ESP32 microcontroller, ...

This Android app connects to an ESP-32 microcontroller via Classical Bluetooth (SPP) and facilitates message exchange. The ESP-32 acts as a bridge between serial communication and Bluetooth, sending ...

Last year we brought word of a project from [Shyri Villar] that turned a stock Game Boy Advance into a Bluetooth controller by exploiting the system’s “multiboot” capability. The prototype hardware ...

“The IOT is a rapidly growing set of fragmented and multi-faceted applications. The combination of Wi-Fi and Bluetooth offers the best user experience, covering a wide range of use cases.” said Teo ...

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 ...

We probably don’t need to tell the average Hackaday reader that the ESP32 is a powerful and extremely flexible microcontroller. We’ve seen some incredible projects using this affordable chip over the ...