A $10 Board That Speaks Every Protocol

Open-source firmware turns a cheap ESP32-S3 board into a full hardware analysis tool — no extra software, just a browser and a USB cable.

A $10 board that can talk to almost anything

There's a small piece of hardware called a Flipper Zero that became something of a cult object in tech circles — a handheld device that can sniff, read, and interact with all kinds of signals and electronic protocols. It costs around $170.

This week, a developer published something that does something remarkably similar for about $10.

It's called ESP32 Bit Pirate. You buy a tiny development board (the ESP32-S3 — the kind of thing hobbyists use to build connected gadgets), visit a website, click one button to install the firmware, and you have a device that can listen to and interact with Bluetooth, Wi-Fi, RFID signals, and a dozen other communication protocols used inside electronic devices.

You control the whole thing through your browser. No software to install. No command line. Just a web interface and a USB cable.

For anyone building a physical product — a connected device, a piece of hardware for a client — this is the kind of tool that used to cost serious money or require a specialist to bring in. Now it fits in a shirt pocket and costs less than lunch.

The project appeared on GitHub's trending list and made the front page of Hacker News. Over a thousand developers starred it in the first few weeks.

Words worth knowing

Firmware — Software that lives inside a hardware device. Not an app you download — it's baked into the chip itself.

Protocol — The language two devices use to talk to each other. Bluetooth, Wi-Fi, and RFID are all different protocols, like different languages.

ESP32-S3 — A tiny, cheap chip made by a Chinese company called Espressif. It's the engine inside thousands of smart home gadgets and DIY electronics projects.

RFID — The technology behind office key cards and contactless payments. Short for Radio Frequency Identification.

If you're building any kind of physical product with electronics inside, it's worth knowing this tool exists. Next time a hardware engineer quotes you for a security audit, you have a better sense of what they're actually working with.