1. Super_Beacon_1_2_3_915_NIA_stationary.hex - firmware for stationary
   Super-Beacon-1, Super-Beacon-2, Super-Beacon-3 (NIA architecture)

2. Super_Beacon_4_915_NIA_stationary.hex - firmware for stationary
   Super-Beacon-4 (NIA architecture)

3. Super_Beacon_4_915_NIA_mobile.hex - firmware for mobile Super-Beacon-4
   (hedgehog) with IMU sensor fusion (NIA architecture)

4. intermediate - the intermediate image of the mobile Super-Beacon-4. The
   Dashboard uses it by itself when the hedgehog runs an older firmware that
   cannot take the full image at once (two-stage update). Do not flash it by
   hand

5. DFU - folder with the DFU files of the firmware 1-3 (ST DFU mode, recovery
   only; no intermediate stage is needed there)

WARNING: never flash the Super-Beacon-4 firmware into Super-Beacon-1, -2
or -3, and never flash the Super-Beacon-1, -2, -3 firmware into
Super-Beacon-4. The beacon will not work, and in the worst case the
hardware can be damaged
