Six months of design iterations, sourcing headaches, and a broken oscilloscope later — I am pleased to share a hardware module I designed to extend the Flipper ecosystem for RF security research. This write-up covers the motivation, engineering challenges, capabilities, and responsible-disclosure principles behind the project — and a frank look at a vulnerability that is very much alive in the Maldives today. Left: 3D render of final PCB · Right: Altium Designer PCB layout view Why I Built It The trigger was reading the original MouseJack disclosure by Bastille Networks. It made me realize that a class of peripherals most people assume to be harmless — the cheap wireless mouse on your desk — can be weaponized from a car park. I wanted a research platform small enough to carry in a jacket pocket, native to the Flipper Zero ecosystem, and capable of passive scanning, protocol analysis, and controlled lab tests. What I...
This experiment was bit delayed due to lack of libraries for RS485 for Arduino. After lots of frustrations, i manage to make it work with soft-serial. Master controller send the command in bytes with [slaveid,status,level] and when a specific id slave response to it and lit and LED. Level byte is an analog value sent by master to dim the LED. RS485 is a long distance communication protocol which is used is several industrial applications so it can be used to monitor and control devices in a twisted pair network.