RealFeedApp The Semtech LR2021 chip now supports custom firmwares
Researchers extracted a hidden microcontroller from the Semtech LR2021 chip and successfully updated its firmware, enabling on-chip FFT processing and mesh network node control.
- Field
- tools and releases
- What they did
- Researchers disassembled a LoRa Semtech LR2021 chip and found a hidden microcontroller with updatable firmware, instead of being a simple pre-programmed chip.
- Why it matters
- This allows creating custom firmwares for this chip, for example, to run Fast Fourier Transforms (FFTs) on its onboard processor or operate a mesh network node directly on the chip.
#lora#semtech#microcontroller#firmware#reverse engineering#software-defined radio
