SailScreen

A touchscreen marine dashboard for ESP32-S3 featuring GPS speed, compass, chart, and ESP-NOW peer networking. Configure peers and view navigation data directly on the device—no webserver required. Supports microSD logging and is optimized for the JC3248W535 display.

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Device

• Model: JC3248W535 (ESP32-S3, 3.5" capacitive touch IPS, 8M PSRAM, 16M flash, 320x480)
• Display: axs15231b (QSPI)
• Touch: axs15231b (I2C)
• MicroPython compatible
• microSD card: Used for logging GPS data and storing files.

Connectivity

• GPS: NEO6Mv2
• Wireless: ESP-NOW

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Features

• Parse GPS data and display on screen.
• Screen 1 (Main):
  • Speed (knots)
  • Direction (compass)
  • Chart (average speed indicator)
  • Average speed (small text above chart)
• Screen 2 (GPS Info):
  • Latitude / Longitude (as floats)
  • Satellite count and GPS fix status (2D/3D/No Fix)
  • Navigation buttons
• Screen 3 (ESP-NOW Peer Management):
  • Form to add/remove ESP-NOW peer MAC addresses (no webserver needed)
  • MAC addresses are stored in /peers.txt on the device
  • Navigation buttons
• ESP-NOW:
  • Device sends speed and compass data to all peers listed in /peers.txt
  • Peers can be managed directly from the device UI (screen 3)
• microSD card:
  • Used for logging GPS data and storing files (future feature)
• Touchscreen navigation:

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