Introduction

HALSER is an ESP32-C3 based development board designed for marine serial interface applications. It bridges legacy serial devices — NMEA 0183 instruments, RS-232 equipment, and UART peripherals — to NMEA 2000 networks and WiFi.

Shop Link

Purchase HALSER from the Hat Labs web shop.

Key Features

• ESP32-C3 microcontroller — 32-bit RISC-V core, 4 MB flash, WiFi
• Wide-range power input — 5–32 V with surge and reverse polarity protection
• NMEA 2000 — CAN bus interface via 4-pin pluggable terminal block
• RS-485 TX and RX — Bidirectional NMEA 0183 communication
• RS-232 — Legacy serial device support
• UART — General-purpose serial (3.3 V / 5 V selectable via jumper)
• 1-Wire and I2C — Expansion buses for temperature sensors and other peripherals
• USB-C — Programming and serial communication
• RGB status LED — Visual indication of board state
• EMC-compliant design — Won't interfere with navigation or radio equipment
• Compact form factor — Fits standard 100×68×50 mm waterproof enclosures

What's in the Box

• HALSER board
• 4-pin pluggable screw terminal (NMEA 2000 and power)
• Two 3-pin pluggable screw terminals (serial I/O)
• Two jumper headers (serial configuration)

Where to Start

• New to HALSER? Start with the Getting Started guide for hardware setup.
• Connecting devices? See the Usage section for wiring and interface details.
• Building firmware? The Software section covers development options.
• Looking for specs? The Hardware Description has detailed technical reference.