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Beyond BLE: Cracking Open the Black-Box of RF Microcontrollers [video]
Despite the recent popularity and breadth of offerings of low-cost RF microcontrollers, there is a shared absence of documentation for th...
In this talk, we will finally peel back the curtain on one of these RF MCUs, giving the ability to understand and unlock the full potential of the hardware to operate in new modes. With a reference manual filled with countless diagrams and register maps for all its peripherals, the Radio section is surprisingly sparse, only mentioning a high-level API for exchanging commands between an RF coprocessor core. Additionally, we investigate the hidden DSP Modem cores, and decode their proprietary ISA to disassemble and craft new firmware patches for them as well, potentially opening up the door for a cheap single-chip SDR.
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