Espressif's ESP32-P4 revision 3.0 and greater converts pin 54 of the chip from NC (non-connected) to a power rail (VDD_HP_1), ...
Although the RTL-SDR is cheap, accessible, and capable enough for many projects, it does have some important limitations. In ...
The firmware of the Flipper One is already publicly available, and there's a lot of interesting tech.