December 18, 2022
CTC heatpump MODBUS interface
November 28, 2022
Calculate wind using U and V GRIB components, NodeRed, JS
In this post I will extract wind data from a GRIB forecast file and use the U V components to calculate, and display, wind speed and direction at a chosen point. The data is visualized as graphs in a NodeRed dashboard.
November 06, 2022
Speedtest LAN and Internet/WAN, iperf3
October 01, 2022
Internet speed measure II
This application is measuring Your Internet connection at chosen intervals using speedtest.net and showing the result in a graph. If the speed is under a set value it will send You an e-mail.
September 18, 2022
Victron monitoring solution, Venus, on Raspberry
Updated 2022-09-18 !
Victron have a state-of-the-art monitoring solution used by the GX products. It can monitor their other system components such as inverter/chargers, solar chargers, shunts, and batteries both local and remote all over the world.
If you have a smaller Victron solution it is nice to know that the same software, Venus OS(VOS), can run on a Raspberry Pi(RPi) instead of the more expensive and versatile GX products.
August 16, 2022
macOS Monterey on unsupported Mac
This is despite that max OS for the Mac is High Sierra. This is done, among other things, due to that the patcher handles Macs with graphic cards from 2008 - 2011 which Monterey doesn't do natively.
Since my former upgrade, to Big Sur, included a format of the SSD disk I here used the patcher to do an upgrade from Big Sur to Monterey.
August 14, 2022
Node-Red quick install
Node-Red(NR) is Flow-based programming for the Internet of Things
This post isn't made as a complete install guide, there are several, just some links to the best information I have found.
The best thing is that even if you don't are a skilled programmer, but like logic flows, you can make really advanced things. It's pre-installed on some Raspberry Pi(RPi) distributions.
Running Node-Red with multiple instances ?
July 27, 2022
RS-232 with displays & AV equipment
After some checking I found that on most displays, even on our own TV set, there is a connector for the RS - 232 protocol that accepts commands similar to the commands sent by the remote control.
July 09, 2022
Davis PWS linked to pwsweather.com
An add on is that you via API:s can get both the current weather, forecast and other data free of charge, via the aerisweather.com(AW) site.
This post will handle the setup and also a Node-Red dashboard interfacing the aeris API.
July 04, 2022
Node-Red multiple instances, RPi
- a test environment for Node-Red(NR), separated from production
- separated instances for different applications
A post for NR quick install.
June 20, 2022
LK System, Floor heating
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 ?
June 12, 2022
NMEA 2000 temperature sensor, wet exhaust
June 10, 2022
Exhaust temperature measure, boat
In "wet exhaust" systems it is very important that the cooling water, injected in the exhaust system, always is present otherwise major damages can follow.
May 10, 2022
Wine, Windows apps on Linux, Raspberry
What is Wine ?
The OpenSource project, themselves, explains it as;
Wine (originally an acronym for "Wine Is Not an Emulator") is a compatibility layer capable of running Windows applications on several POSIX-compliant operating systems, such as Linux, macOS, & BSD
So why ? In my case, I'm just running macOS and Linux, I had and old gadget where I had to change the settings and this could only be made with a windows program.
April 16, 2022
Raspberry 4 USB SSD boot in 60 seconds !
If you have a RPi 4 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. But check this first.
February 20, 2022
WeatherLink weather template, v2 API
February 03, 2022
Read and write NMEA files, Openplotter, Signal K
Other applications could be Openplotter which includes SK or OpenCPN for example interfacing a NMEA 2000 network via SK.
There are sample files within the SK installation which can be used, for testing purposes, before you have created your own log files from your boat trips. Check here at "Input file/data".
January 23, 2022
Read & write Linux, ext4, volumes with Windows & Mac
January 21, 2022
macOS Big Sur on unsupported Mac
January 11, 2022
Victron VE.Direct with Raspberry Pi/Signal K
January 10, 2022
Raspberry, edit config or add files before boot
So how to change the host name on the cloned SD card before I'm using it in the second RPi ?