Archive : 5 November 2026 год

The open-source LakeShark project turns the ESP32-P4 microcontroller into a pocket-sized, autonomous software-defined radio (SDR) spectrum scanner and signal visualiser. It eliminates the need for power-hungry laptops or single-board computers typically required for real-time RF analysis with USB SDR dongles.

Key Characteristics

• Core processor: ESP32-P4 with dual high-frequency RISC-V application cores
• Real-time processing: on-board FFT calculation for spectrum analysis
• Display: native MIPI-DSI support for capacitive touchscreens
• Real-time visualisation without frame drops:
  • Waterfall diagrams
  • Frequency spectra
  • Signal strength meters
• Supported RF hardware: low-cost SDR receivers + LoRa modules (SX1262, LR2021)
• Frequency coverage: sub-GHz industrial bands, amateur radio allocations, aviation frequencies
• Touch-optimised controls for centre frequency, gain, bandwidth and visualisation parameters
• Power: internal Li-Po battery, fast boot, high energy efficiency
• Fully autonomous - no external host computer required
• Open-source project

By moving real-time signal processing and graphics rendering onto a modern RISC-V microcontroller, LakeShark delivers a compact, battery-powered RF diagnostic tool suitable for field use.

Target Applications

• Field RF spectrum scanning and interference hunting
• Debugging sub-GHz wireless modules and IoT telemetry
• Amateur radio and local signal analysis
• Portable test equipment for engineers and researchers

Source:  Electronics For You