CiferTech

Fennec started because every SI4732 radio project I looked at did the exact same thing. Small screen, a dial, maybe an encoder. Fine radios. All of them stopping at “tune and listen.” I wanted mine to actually do something with what it hears. Pull pictures out of shortwave. Read Morse off the air. Point me toward a transmitter using nothing but a signal meter and my own two feet. This post is the complete rundown. Hardware, flashing, every tool, and what’s still coming. The Hardware At the…

ESP32-DIV started as a personal tool. Something I built because I wanted one device that could handle WiFi, Bluetooth, Sub-GHz, IR, RFID, and GPS all from a single handheld board. I never expected it to grow the way it did. People started building it. Then selling it. And some just grabbed the code and called it their own. That’s open source. But the real community the people opening PRs, reporting bugs, actually contributing that’s what kept this project alive and moving forward. This post is…

Hi everyone, welcome back — I’m Cifer. I’m back with EvilDuck S3 — the third and final hardware revision of my open-source USB rubber ducky project. EvilDuck started as a simple experiment. A custom PCB around an ATmega32U4, an SD card slot, and a script that made a computer think a USB drive was a keyboard. It worked — but it was limited. No WiFi, no remote control, no web interface. Just plug in and hope the script runs correctly. The second version added a web server. Still not quite right.…

Hey everyone — Cifer here This project started as a simple experiment, the kind where you just want to test an idea quickly and see if it works, but somewhere along the way it turned into a full system involving RF tracking, real-time visualization, custom hardware, and eventually… a drone. The original goal was straightforward: Build one of the cheapest indoor localization systems possible using ESP32. No expensive modules. No complex setups. Just signal strength… and curiosity. It worked. But…

I’ve worked with the PN532 before. The first version of NullTag actually worked. It could read cards, clone some tags, dump memory — the usual stuff. But deep down I knew it wasn’t engineered properly. It was an ESP32, a PN532 module, some wiring, a display… it did the job, but it didn’t feel like... The post I Built an RFID “Disruptor”: Confuses Readers & Destroys Tags appeared first on CiferTech.