Imported from GitHub: hatlabs/HALMET-hardware · commit e8bffda · license CC-BY-4.0

Description

Hat Labs Marine Engine & Tank interface hardware design files

README

Hat Labs Marine Engine/Tank Interface

This repository contains the Hat Labs Marine Engine/Tank Interface (HALMET) hardware design. HALMET is a powerful microcontroller development board designed for marine environments with a focus on engine and tank monitoring.

HALMET can be used to easily create different types of sensors and control devices for boats. Use scenarios include:

• RPM sensors
• tank level sensors
• bilge sensors
• Engine alarm sensors
• Engine temperature sensors

Since the board has native WiFi and NMEA 2000 compatible CAN bus connectivity, it can be used to create boards with either Signal K or native NMEA 2000 connectivity (or both!).

Features

The main design features include:

• Built around ESP32, a powerful 32-bit microcontroller with 4 MB of flash
• Wide-range 6-32 V power input with surge protection
• NMEA 2000 compatible CAN interface (4-pin pluggable terminal block screw connector)
• 4 analog inputs with 0-32V input range and 16-bit resolution (2-pin pluggable terminal block screw connectors)
• 4 digital inputs with -32-32V input range, Schmitt triggered logic level threshold at 1.5V (2-pin pluggable terminal block screw connectors)
• 1-Wire interface (3-pin 2.54 mm header)
• I2C interface with both a SparkFun Qwiic connector and a 4-pin 2.54 mm header
• USB interface for programming and serial communication (USB Micro B)
• All above interfaces with proper electromagnetic compatibilty (EMC) design -- the device won't interfere with navigational devices or radio equipment
• All available general-purpose input/output (GPIO) pins broken out to a separate header
• Board designed to fit low-cost waterproof 100x68x50 mm enclosures

Rendering of a version 1.0.0 board:

Getting HALMET

HALMET will be available for purchase at the Hat Labs web store.

Documentation

HALMET documentation will be available at the project GitHub Pages.