What is Node-Red?

Node-Red is a visualized programming environment that comes from the IoT area. It is primarily used to connect sensor hardware and the corresponding data visualization. Node-Red consists of so-called nodes, which are connected to one another using rubber band technology and thus determine the flow of data.

What do sailors get out of it?

Node-Red offers nodes to read sensors, to process NMEA-0183 data via serial interfaces or to read and process SignalK data streams.… Continue reading

AIS data exchange

ship spotting

Popular services like or do rely on numerous AIS station around the world.
Volunteers are collecting AIS-data within reach of their receivers and pass them to the servers. There are still areas, not yet covered!
A receiving station can be set up inexpensively: Internet connection, RaspberryPI, DVB-T stick and an old TV antenna on the roof are sufficient.… Continue reading

NMEA2000 and ESP32

First of all, a few important notes that you should definitely pay attention to.

NMEA2000 is increasingly replacing NMEA0183 as the standard. Unfortunately, NMEA2000 is a very complex protocol and for a long time it was hardly possible to realize your own projects. That has changed with the NMEA2000 library by Timo Lappalainen (

The library supports different microcontrollers, including the ESP32. The ESP32 from Espressiv is very powerful and, thanks to the WLAN and CAN bus interface, is ideal for your own projects.… Continue reading

DIY boat automation

  • Use of components from home automation
  • Connection via WLAN
  • Operation via web browser with mobile phone or tablet
  • Design of your own operating pages with HTML code using predefined widgets and CSS
  • Free configuration of symbols and names via configuration file
  • No JavaScript programming necessary
  • Special open source firmware required for control units (Tasmota)
  • No cloud connection necessary
  • Devices are controlled directly with HTTP commands
  • Device Manager available for device management
  • Big community
  • Well-tested firmware with a wide range of uses
  • Diverse device hardware available
    • 1-channel switch without current measurement
    • 1-channel switch with current measurement 230V AC
    • 4-channel switch potential-free
    • 4-channel switch potential-free with 433MHz radio remote control
    • Valve drive
    • LED light control
    • Temperature sensor
    • Fan
  • Own hardware can be integrated via generic modules
  • Inexpensive from approx.
... Continue reading

3D printing for useful parts

Since 3D printers are cheap these days, it's worth printing out one or the other useful part yourself. The imagination knows no limits. Basically anything you need can be printed. But you have to be a little careful when it comes to the strength and sun tolerance of the parts. Not all plastics are suitable for outdoor maritime applications.… Continue reading


Fig.: Linux program for PC NAVTEX PC

Jürgen from the Segeln-Forum took the trouble to create a Linux program for reading out the data for NASA's PC NAVTEX USB. The PC NAVTEX program is used to display NAVTEX messages that are sent with the NAVTEX receiver "PC NAVTEX USB” of the company NASA were received. The data is transmitted via the serial interface.… Continue reading