Housing for ESP32 Display - Marine Display
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Small Marine Gauge - Fed by SignalK - Housing and links to hardware
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A $35 helm display for wind, speed, depth and anchor watch
I wanted more screens on the boat for wind, speed/depth and an anchor alarm, without running more NMEA wiring. With some help from Claude, I built one on a 4" ESP32 touchscreen. It reads everything from the boat’s SignalK server over WiFi.
What it does
7 pages you swipe through: wind (with a rotating compass), speed + depth, boat status (battery, fuel, water tanks), power and solar, anchor watch, weather (barometer trend), and system
Anchor watch: shows where you dropped the anchor, your swing circle and your track over the last 15 minutes. It sounds a buzzer if you drag, or if the data stops coming in. No data should never look like a calm anchorage.
Only needs USB-C power and WiFi: no NMEA wiring to the instruments
Two-minute setup: scan a QR code with your phone, pick your boat’s WiFi, and it finds SignalK by itself
Day / night / sleep modes, or auto, which dims at dusk based on your GPS position
Works from home too: mirror the boat’s SignalK to a desk display over a VPN
Hardware: Waveshare ESP32-S3 4" touch display (480×480)
AMAZON - ESP32 4" Display
Code (open source, MIT): ESP32 Marine Gauge
ESP32 Marine Gauge