kicad_nmea2000_sensor

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README

NMEA 2000 KiCAD PCB and sketch for analog inputs (e.g. water level, fuel gauge, switch, etc ...)

Based on https://github.com/ttlappalainen/NMEA2000

Can be used to create a NMEA 2000 device like a sensor for fuel gauges. The board is easy to work with since it contains ISP and serial ports.

Use at your own risk. Don't forget the right external fuses, etc.

Prerequisites

A NMEA2000 or Seatalk NG network
PlatformIO CLI from https://platformio.org
A PCB manufacturer of your choice and some SMD soldering experience

How to

PCB

Equip SMD parts for power (LDO, etc) first and measure input to output voltage carefully. Adjust R4 (and R3) resistors, if necessary. If voltage is around 4.8V - 5V, place other parts.

Burn bootloader

Disconnect PCB from other power sources or adapters.
Connect an AVR ISP programmer (usbasp) to ISP port
Change into arduino-blink directory and type pio run --target fuses. If the chip doesn't answer run avrdude manually with -B flag to set the bit clock rate, see https://electronics.stackexchange.com/questions/388324/avrdude-error-program-enable-target-doesnt-answer-1
Change into arduino-blink directory and type pio run --target bootloader
Optional: The sketch can be uploaded via ISP directly from arduino-sensor directory (pio run --target program)

Upload sketch

Disconnect PCB from other power sources or adapters.
Connect an USB serial adapter to serial port
Change into arduino-sensor directory
Run pio run --target upload

If errors appear during upload (e.g. or use another USB cable, USB hub or USB adapter. Check USB voltage (>4.89V) and ripple noise.

Comments

NMEA 2000 KiCAD PCB and sketch for analog inputs (e.g. water level, fuel gauge, switch, etc ...)

Can be used to create a NMEA 2000 device like a sensor for fuel gauges. The board is easy to work with since it contains ISP and serial ports.

Use at your own risk. Don't forget the right external fuses, etc.

Prerequisites

A NMEA2000 or Seatalk NG network

PlatformIO CLI from https://platformio.org

A PCB manufacturer of your choice and some SMD soldering experience

How to

PCB

Equip SMD parts for power (LDO, etc) first and measure input to output voltage carefully. Adjust R4 (and R3) resistors, if necessary. If voltage is around 4.8V - 5V, place other parts.

Burn bootloader

Disconnect PCB from other power sources or adapters.

Connect an AVR ISP programmer (usbasp) to ISP port

Change into arduino-blink directory and type pio run --target fuses. If the chip doesn't answer run avrdude manually with -B flag to set the bit clock rate, see https://electronics.stackexchange.com/questions/388324/avrdude-error-program-enable-target-doesnt-answer-1

Change into arduino-blink directory and type pio run --target bootloader

Optional: The sketch can be uploaded via ISP directly from arduino-sensor directory (pio run --target program)

Upload sketch

Disconnect PCB from other power sources or adapters.

Connect an USB serial adapter to serial port

Change into arduino-sensor directory

Run pio run --target upload

If errors appear during upload (e.g. or use another USB cable, USB hub or USB adapter. Check USB voltage (>4.89V) and ripple noise.

kicad_nmea2000_sensor

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NMEA 2000 KiCAD PCB and sketch for analog inputs (e.g. water level, fuel gauge, switch, etc ...)

Prerequisites

How to

PCB

Burn bootloader

Upload sketch

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NMEA 2000 KiCAD PCB and sketch for analog inputs (e.g. water level, fuel gauge, switch, etc ...)

Prerequisites

How to

PCB

Burn bootloader

Upload sketch

BOM