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

LakeShark, an open-source firmware by Samuel Reynolds, turns the ESP32-P4-based LilyGO T-Display P4 into a handheld SDR scanner with an RTL-SDR Blog V3 or V4 dongle. It handles P25 Phase I trunking, analog FM/AM, POCSAG pager decoding and 1090 MHz ADS-B reception without a PC, Raspberry Pi or smartphone. Version 2.5.0, released September 27, 2026, adds aircraft trails and MeshCore nodes to offline maps.

• Runs SDR tasks on the ESP32-P4 without a PC or smartphone
• Supports P25 Phase I, FM/AM, POCSAG and 1090 MHz ADS-B
• Onboard SX1262 for LoRa and MeshCore, L76K GPS and ESP32-C6
• Basic hardware setup costs around $245–255 with dongle and keyboard