Various projects find hidden SDR capabilities in ESP32 microcontrollers

T1Covered by 1 source · first reported by Raspberry Pi / Arduino / Adafruit at 12 Oct, 14:46 UTC

RTL-SDR.com reports that the ESPARGOS team found an undocumented feature in several ESP32 chips that lets firmware bypass the fixed WiFi and Bluetooth radio functions and capture raw IQ baseband samples. That turns the chips into an internal SDR covering 2.2 to 2.7 GHz, plus 4.8 to 6.0 GHz on the…