LK System, Floor heating

Updated 2024-08-15 !

Do You use a floor heating system from LK Systems ?

We had a problem that in some rooms, despite that the thermostat worked, the temperature was too high.

To check if it was the valve, or something else, I just took away the actuator and forced the valve to be closed. Cable ties did the work.

The valve was OK so what was the problem ?

Building your own floor heating controller,  PID controller ? 

Waveshare CAN hat with Signal K & OpenPlotter

Updated 2024-07-08

To get information from the NMEA 2000(N2K) network, to the RPi, I have been using Actisense NGT-1, for a long time, and later also the Yacht Devices YDWG 02 but now it was time for a Raspberry Pi(RPi) CAN hat(CH) from Waveshare(WS). WS have 3 different models but I picked the 2 channel isolated one.

It's recommended to use an isolated one which also is demanded for those interfaces which can be approved by the N2K group.

Raspberry Pi OS Lite with GUI, RDP, VNC, Chromium

Updated 2024-07-01 !

I like the Raspberry Pi(RPi), with Raspberry Pi OS Lite (no Desktop is included), headless operation, and then adding the software You need. Until now I haven't had a use case where I needed a Desktop but now was time. 

Why don't use the Raspberry Pi OS with Desktop ?? In that package there is a lot of software I don't need and I really want to optimize the RPi. I think that the less software You install the happier RPi will be...

😉

OpenPlotter v4 stable, install guide

Updated 2024-06-30 !

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.

An overall information about the OP package is found here 

and you can watch the OP v4 progress here.

Raspberry Pi 2, 3, 4, 5 USB SSD or USB drive boot

Updated 2024-06-06 !

After having tested several methods creating a bootable USB SSD, or other USB drive, for Raspberry Pi(RPi) 3 4 and 5, I finished with this simple method

• Create the setup you want on a ordinary SD card(Or use existing)
• Make a bootable backup/clone of the SD card saving it to the USB SSD
• Remove the SD card and boot from the USB SSD

Having a RPi 4, 5 ? Use this post on how to write the OS direct to the SSD.

 

Raspberry 4,5 USB SSD boot in 60 seconds !

Updated 2024-06-05 !

Yes, it's really true ! Thats the maximum time it takes to write the Raspberry Pi(RPi) OS to a bootable USB SSD and maybe read this post ?

If you have a RPi 4, 5 and a USB SSD or other USB drive, that works as a boot media, just use the RPi imager which can write the image direct to the USB  storage.

Having an older RPi ? Use this post instead.

If you already have a SD card with working applications and you want to "transfer", copy/clone, them to a bootable SSD use this post.

Bredbandskollen, Internet speed, CLI

Im using NodeRed together with Speedtest by Ookla but just the other day it wasn't showing the right data so it was time for "Bredbandskollen", the command line version.

Bredbandskollen has always been a reliable source when testing internet speed. I'm using their WEB-site and the iPhone app and it have always worked very well.

This post will show how to plot data in a graph according to the picture.

Raymarine E120 & E80 backlight failure

Just the other day the backlight for our classic Raymarine E 120, Navigator(MFD), stopped working.

It's from 2006 so I'm not surprised that things happen. You may wonder why we keep it instead of buying a new one but the thing is that we have 2 installed together with a well functioning radar so buying new stuff will be a hefty price tag.

After some Googling I found out that the backlight is produced by a CCFL, a type of neon light, and can give up after some years.

The Googling also gave some tips how to change to a LED backlight. The picture above is showing a test with a short LED light strip to verify the solution, with dimming working, and checking the health of the MFD.

Signal K charts, offline & online

Updated 2024-05-03 !

In Signal K(SK) there are 2 applications, in SK appstore, that can handle charts

• Freeboard SK(FSK)
• Tuktuk Chart Plotter(TT)

FSK, preinstalled, uses the OpenSeaMap charts(OSC) when you are online. If you want to use offline charts or other chart resources you have to install "@signalk/charts-plugin"(CP)

IVT, Bosch heat pump easy integration, Home Assistant

In search of the optimal solution on how to interface our IVT Heat pump, first try here, I stumbled over a nice integration for Home Assistant(HA). A first quick setup is shown at the right.

The first obstacle was that it was HA which I knew about but never used.  So it was "back too school" and doing a blog post about a HA Core install.

Home Assistant core install, Raspberry Pi and Python 3.12

The best way to start with Home Assistant(HA), and Raspberry Pi(RPi), is off course to use the ”Raspberry Pi imager” and in the menu select "Other specific-purpose OS => Home Assistant and home automation => Home Assistant". This will install the HA operating system.

It works very well and here are the install instructions. 

On the other hand if you want to add HA to a RPi which you already have up and running, without Docker, you need to install something which is called "Home Assistant Core".

Please check the "Remarks" below before you start.

IVT, Bosch heat pump easy integration, NodeRed

If you are running the IVT Anywhere or the Bosch Easy remote app you probably also can retrieve its data with for example NodeRed. 

With the nice application Bosch XMPP you can set up an integration with the cloud service supplied by your vendor.

OpenPlotter V3, install guide

Updated 2024-03-01 !

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.

An overall information about the OP package is found here.

Install guide for the new stable OP, version 4, is found here.

Clone the Raspberry boot disk

Updated 2024-02-20 !

A very nice way to fix a backup is to make a copy, bootable, of the actual SD card You are using on the Raspberry Pi(RPi). This will be done even when the RPi is up and running !

This application can also be used to make a bootable SSD or USB drive !!

You clone from the command line so You don't need the standard GUI, Pixel, and the "SD card copier" function.

It is also possible to set up a a scheduled job, cronjob explained later, which for example makes a clone every night at 1 o'clock.

DMI forecast API for atmosphere, ocean and sea ice, free !

Updated 2024-02-10

DMI is the Danish Meteorological Institute and the Open Data API provides free and open access to DMI’s data.They are covering a pretty big area not just Denmark.

I'm maintaining the weather station for Domstens yacht club and have become really interested in weather "issues".

The actual use case for me is that I have to change the mooring, of our boat, if the water level exceeds 60 cm from normal. For several years I have been searching for a free forecast API so I can get an early warning when the water level rises.

Node-Red is used.

GRIB files and extracting data, Linux, Raspberry

Updated 2024-02-08

GRIB is a data format, used for meteorology, to store historical and forecast weather data. 

The use case for me was analyzing forecast data, from GRIB files, so an early warning could be rised before a high water level or coming storm appears. This could then be used at our weather site.

There are several applications, also ones that visualizes the data, but this post will handle how to extract data from files using command line.

Teltonika RUT 240 as source for Mesh Network or router

I have used the TP-link Deco M9 for quite a while and it have worked very well.

Since almost 2 years I have used mobile broadband as a source for the Mesh network, at home, via a Nokia Fastmile(NF) with no direct flaws.

Getting a very nice offer, half the monthly cost, for mobile Internet from our mobile phone operator it was time to test something new.

Since I probably will have to return the Nokia receiver quitting the old supplier I had to test the new provider with some other equipment. Running the Teltonika RUT 240(TR) in our yacht, in the summertime, it was available for testing.

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 !

Install Weather34 with WeatherLink, v2 API

Updated 2024-01-08 OK with Bookworm 64 bit, PHP 8.2 !

This post is an update from a former post which handles on how to set up a weather WEB-site with data from Davis Weather Link(WL) but here adapted to the latest WL API v2.

Any product that reports weather data to WL can be used as a source for this weather template.

This is made without additional software such as Cumulus, Weather display or the Meteobridge product.

RPi install Apache/PHP WEB-server

Updated 2024-01-07 ! OK with Bookworm & PHP 8.2 !

As a part of one of my project, the ultimate Weather site ? Weather34, I needed a WEB-host with PHP.

I started up with a fresh Raspberry OS Lite SD Card with Samba installed.

Log on, with ssh/terminal to the RaspberryPi(RPi), in this case hostname "pws01", and update the OS with

sudo apt update
sudo apt full-upgrade -y
sudo apt clean

go on and install the Apache server with

sudo apt install apache2

Samba, RPi as Windows file/print server

Updated 2024-01-05 OK with Bookworm !

If You want that the Raspberry Pi(RPi), shall appear in MS File Explorer or Mac Finder, as a File server, the easiest way is to install Samba.

This also makes it much easier if You want to edit files on the RPi with editors from Your MS/Apple device. Or maybe moving files from/to the RPi.

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". 

Signal K quick install

Updated 2023-12-01 !

I have got some questions installing, just, Signal K(SK) so will do a summary, on a Raspberry Pi, with links.

Signal K is the hub to receive data, from different devices in different data formats, and send it on to different equipment, or databases, in different formats. Most common for standard marine equipment are the old NMEA 0183 and the newer NMEA 2000 protocol which is also handled. 

Besides the SK "hub" function developers have created plugins for different purposes. This is due to that SK is open-source ! Sharing is caring !

In this post you can check the devices I'm using connected to the SK server and also my setup.

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 !

Raspberry Pi watchdog made simple

Updated 2023-11-08 for Bookworm !

The purpose of a watchdog timer(WD) is very well described here but a more practical answer is;

If your Raspberry Pi(RPi) "freezes", or hangs, it will automagically reboot within a very short time.

This is made with a combination of hardware and software which is all ready available, on the RPi, and just have to be enabled.

After some hours Googling and testing these are my findings !