LakeShark firmware turns LilyGO T-Display P4 into a handheld ESP32-P4 SDR scanner

LakeShark is open-source firmware by Samuel Reynolds (SAMS0N1TE) that turns the ESP32-P4-based LilyGO T-Display P4 into a handheld SDR scanner. Paired with an RTL-SDR Blog V3 or V4 dongle, it supports P25 Phase I trunking, analog FM/AM, POCSAG pager decoding, and 1090 MHz ADS-B reception directly on the ESP32-P4, without a PC, Raspberry Pi, or smartphone. It also includes an onboard SX1262 that supports LoRa and MeshCore applications. SDR devices like LimeSDR Micro, xSDR, UUGear’s VU GPSDR, and many others usually rely on a PC, Raspberry Pi, or smartphone for processing, but LakeShark shows that a powerful microcontroller can also handle many SDR tasks. We previously covered the LilyGO T-Display P4 in March 2026, and LakeShark makes good use of its built-in hardware, including the SX1262 for LoRa and MeshCore applications, L76K GPS receiver for location tracking and offline maps, and ESP32-C6 for Wi-Fi and Bluetooth connectivity. LakeShark hardware requirements: Primary [...]

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