AIS receiver and dispatcher ! The best ?!

Updated 2024-10-25

I found this amazing application, AIS-catcher, just scrolling around on Youtube and it includes "all" you need for an AIS receiver staying ashore or installed on a boat.

It is compatible with a wide range of Software Defined Radios (SDRs). These include RTL-SDR dongles (such as the ShipXplorer AIS dongle and RTL SDR Blog v4), AirSpy (Mini/R2/HF+), HackRF, SDRPlay, SoapySDR, and file/network input (ZMQ/RTL-TCP/SpyServer). 

AIS reciever for Raspberry Pi, 2 channel

Updated 2024-01-20 !! OK with Bookworm !!

This post covers the setup for a AIS, dual channel, receiver for Raspberry Pi(RPi) with systemd autostart.

I'm using the RTL-SDR dongle V3 with almost zero temperature drift or the even better NooElec NESDR Nano 3

AIS posts with charts/maps

• OpenSeaMap and dispatcher 
• OpenStreetMap and dispatcher

Improve receiving range? Calibrate ! Instructions in this post

The best AIS application ? is found here !

SDR calibrate with kalibrate-rtl

Updated 2023-12-05 !! OK, with Bookworm (32/64 bit) !!

To optimize the reception with SDR:s, Software Defined Radios, it is important to receive on the proper frequency. Due to variations in production there could be deviations.

The calibration could be done against standard GSM transmitters which are providing a stable reference frequency.

Another way is found in the AIS-catcher application and use the information supplied in the graphs "Frequency Shift". 

AIS receiver & dispatcher with OpenSeaMap

Updated 2023-11-09 !

The AIS posts on this blog have been very popular so this post will be a follow up which will enable You to show AIS targets, including AtoN:s, on OpenSeaMap, (OSM), together with buoys and beacons.

The application showing the map is SignalK, (SK) a OpenSource project for marine use. 

With the "ais-forwarder" plugin you could send/dispatch the NMEA AIS data to Marinetraffic or Vesselfinder. Another AIS-dispatcher.

The best AIS application ? is found here !

NMEA WiFi gateway

Updated 2023-11-06 !

I have searched for a solution transmitting the NMEA data, from the navigation network, via WiFi, to for example iSailor or other Tablet/Phone applications.

Most of these applications just accepts NMEA0183(N1) but many boats are also using SeaTalk 1(ST1) and NMEA2000(N2K).

This post will cover, kept compact, my best findings covering both a DIY and a commercial approach to handle the different protocols.

AIS for Raspberry with Map, Dispatcher

Updated 2023-11-04, OK with Bookworm 32 bit !

Not Bookworm 64 Bit !

This is a setup, on a Raspberry Pi(RPi), with a software package, AIS Dispatcher, from http://www.aishub.net which includes

• receiving and processing of all standard AIS messages
• streaming raw AIS feeds to multiple destinations
• advanced monitoring of device status, coverage and message statistics
• embedded electronic map with all received vessels

The best AIS application ? is found here !

Understand/Install Openplotter/OpenCPN/SignalK, I

Updated 2023-10-15 !

This post, additional posts will follow, will explain the purpose with, and quick/simple install instructions for, OpenPlotter(OP) and some other applications that can be installed with OP. 

• OpenCPN(OC), is the plotter software where You navigate and handle charts 
• SignalK(SK), is the software where all the sensor inputs are handled. Could be NMEA data or SK formated inputs
• OpenPlotter(OP), is the administration shell where all is administrated

As You investigate the different software packages You will see that there are some overlap in the functions.

With OC 5.2 + there was several updates....

Receive temperature, 433 MHz sensors, with RTL-SDR

In my underfloor heating project, using Node-RED, I have to have one sensing thermometer per room/zone, seems to be 8 in total, so therefore it would be nice with a wireless battery sourced device with good resolution and frequent updates.

During the test phase I used a Z-way device but the resolution was pretty bad. Another device mentioned is the Ruuvi tag but since it's a bluetooth device the transmitting range could be better.

After some googling I went for 433 MHz devices.

 Updated 2023-01-02 !

OpenPlotter(OP), a Boat Navigation application, is really a nice and simple installation of

• OpenPlotter(OP)
• OpenCPN(OC)
• SignalK(SK) 

and other supporting applications for Your boat.

Please note that OP V2 is outdated use .......

Raspberry, edit config or add files before boot

The actual use case was that I have a Raspberry Pi(RPi) sourcing Vesselfinder with AIS data from nearby. I wanted to change/test a new configuration but on the other hand I didn't want to take the RPi down, during a longer period, since it's an online service.

So the solution was to make a bootable clone of the actual application and test with a second RPi. The major obstacle was that I then would have 2 hosts, with the same hostname, which will mess up the local network.

So how to change the host name on the cloned SD card before I'm using it in the second RPi ?

Another post on how to read and write Linux drives with Windows/MacOS

SIGNL4, automated alerting with free mobile app

I'm involved in several projects where you, as quick as possible, want to get an alert if anything fails. After a lot of Googling I found SIGNL4.

They have several ways to create an alert, can involve a team, have a nice app and is free, up to 5 users, if you use the "STARTER" option.

In this post, as an example, I will show how I detect if my AIS receiver/dispatcher stops receiving AIS targets, sent to Vesselfinder, and how an alert is forwarded to the SIGNL4 app.

I'm using NodeRed on a Raspberry Pi to realize the function

Raymarine AXIOM and NMEA0183

Updated 2021-07-24 !

Many newer MFD:s don't have any NMEA 0183(N1) connector. The  Axiom don't even have any Seatalk NG connector anymore, just the Device Net micro connector for NMEA 2000. Loosing the  N1 info, too for example the old VHF (position data for DSC), could be a problem so how to solve it ?

Some solutions

• Pick N1 data from the AIS
• NMEA 2000, N2 to N1 konverter
• SeaTalk NG, NG to N1 konverter

AIS dispatcher, stand alone

Updated 2021-07-14 !

The dispatcher "aisdispatcher"(AISD), Linux v1.2, from AISHub.net receives NMEA 0183 VDM/VDO messages, (NAIS) via an UDP/TCP connection, or serial interface, and forwards it to one or several destinations as UDP streams. It works at command line with no GUI.

Please note ! This software is "labeled" deprecated and the AISHub guys recommend you to use this package, with built in GUI, instead. The old version, described in this post, still works, for RPi OS before Bookworm, and is very lightweight.

The best AIS application ? is found here !

Eniro charts using SignalK & Freeboard

Do you know about the SignalK workspace at Slack ? It's a really nice space where you could meet the developers and also get support.

If you don't are active there you can get an invite filling in your e-mail adress at

http://slack-invite.signalk.org

I'm following the dialog on Slack and for some weeks ago I stumbled over a post from @chris saying that you could get, with internet connection, the online charts from Eniro displayed in Freeboard. As you see in the picture it's just for the Nordic countries.

Another post installing offline charts.

VHF antenna splitter, receive

During my AIS project with SDR:s as receivers I built my own antenna for use at home, a standard DIY dipol antenna. 

I connected the dipol, to SDR antenna input, with an a female SMA extension cable which I cut it in two pieces and soldered to the dipol. 

For the boat I didn't want an extra VHF antenna so....

OpenPlotter V1, USB sensors install

Updated 2018-06-26!

If You started with my quick instal guide You are a little familiar with OpenPlotter, (OP), basics and now we proceed with the sensors. Don't forget to delete the RMC sentence from the "NMEA 0183 generator" which we used.

Link to a stand alone AIS receiver.

Not valid for OP Beta V2 !!  Check here !