FlopperZiro
lraton‘s DIY multi-tool: “a Flipper Zero clone, but cheapest, DIY and simply Open Source, made with Arduino IDE.” GPL-3.0, 1.8k stars / 78 forks, C/C++ on an STM32. T1 as an official project repository; everything here is the project describing itself, and nothing about its capability has been measured by anyone.
The bill of materials is the interesting part
- MCU: STM32-L432KC
- Sub-GHz: FS1000A transmitter + RXB12 receiver (433 MHz)
- NFC/RFID: PN532
- Display: SSD1306 OLED, 128×64
- Storage: microSD on a TF shield
- Power: 3.7 V LiPo, TP4056 charger, 5 V boost converter
- Rest: IR LED and receiver, six tactile buttons, a 2N2222A transistor
Every one of those is a commodity breakout board. There is no custom PCB — the design is a wiring diagram, a parts list and firmware. That matters for open-hardware as this wiki has described it: The Open Book publishes a board you must have fabricated, so replication needs PCB fab and reflow. FlopperZiro needs a soldering iron and jumper wires. It is the lowest rung of replicability the spoke has seen, and it gets there by giving up integration rather than by clever design.
What it does
BadUSB (Rubber Ducky scripts), RFID/NFC passive scanning and emulation, infrared capture and replay, 433 MHz receive and transmit, with microSD persistence for captured signals and battery/storage monitoring on the OLED.
What the parts list implies about the limits — an inference from the BOM, not a claim the README makes: the FS1000A/RXB12 pair is fixed-frequency OOK/ASK, so this can capture and replay simple 433 MHz codes and is not a general sub-GHz transceiver in the way a frequency-agile radio would be. The commercial device it is named after uses a programmable transceiver. Same category of function, a different class of instrument.
The README’s own honesty is worth quoting: it is “an educational and experimental project developed as a hobby… not intended to serve as a replacement for professional diagnostic hardware.” There is also a documented quirk — after an Arduino IDE upload the screen may stay black until the Serial Monitor is opened, which triggers a reset. A project that documents its own bring-up bug is describing something it actually built.
A third motivation for open hardware
open-hardware currently names two reasons to publish a design: platform building (Arduino, BeagleBoard — open as distribution strategy, with a company selling boards) and control over the object (The Open Book — the schematic is the argument). FlopperZiro is neither. Its stated reason is cost: get the capability of a commercial product without buying it.
Call that substitution, and note what makes it structurally different from the other two. Platform building needs a company; control-over-the-object needs a principle. Substitution needs only that the commercial product’s functions decompose into parts you can already buy. Where they do — a radio, an NFC front end, a screen, a microcontroller — the product’s advantage is integration, firmware and industrial design, none of which is protected by the parts being unavailable.
Dual use, recorded
BadUSB, RFID emulation and RF replay are the capabilities that make the commercial original contentious,
and they are the same capabilities here. The hub already carries a dual-use posture on both sides of this
— ../osint-wiki for reconnaissance and social engineering, ../defensive-security-wiki for blue-team
practice — and this spoke’s established boundary is that the device as an object of study stays here
while the practice of using one belongs there (awesome-embedded-iot-security settled the same seam).
The observation worth keeping is the one the BOM makes: the capabilities in question are reachable from generic modules that have ordinary uses. Whatever one thinks about tools of this class, a design assembled from a 433 MHz transmitter, an NFC breakout and a microcontroller is a different kind of object from a branded product — legally, commercially and practically — and this wiki has no source on how that difference is treated in any jurisdiction.
Related
open-hardware · microcontroller · embedded-systems · awesome-embedded-iot-security · iot-protocols · lraton · synthesis