PirateBox is a great way to communicate with others nearby when cellular and Wi-Fi networks aren't available. With it, you can anonymously share any kind of media or document and even talk to one another by voice — without being online. However, it needs a Raspberry Pi, which is more expensive than ESP32 boards, and if you only need a text-based chat, there's a much simpler option. With a cheap ESP32 microcontroller and the ChatterBox sketch for Arduino, you can create an offline anonymous ...
