I just reviewed a paper that claimed that reactive jamming of ZigBee would only be possible with sophisticated devices that cost over $3000. First of all, there was already a paper in 2011 which implemented a reactive ZigBee jammer by modifying the FPGA of a USRP2 SDR. But I also just bought a $40 ATUSB ZigBee USB dongle from Sysmocom.
The ATUSB is completely Open Source (drivers, firmware, and schematics) and has native Linux support. It uses an Atmega32U2 microcontroller with an AT86RF231 ZigBee transceiver.
As it turns out, jamming is rather straightforward to implement. We can just extend the interrupt service routine (ISR) and check whether we are notified about the start of the reception process. If this is the case, we use the FORCE_PLL_ON command to enter the PLL_ON state, from which we can trigger a transmission.
Note: Please use radio frequency devices lawfully for your jurisdiction.
8-6-2021 (August 6, 2021) is the Snakiest day of the year and it’s also this year’s CircuitPython Day! The day highlights all things CircuitPython and Python on Hardware. See you there!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.