Pyssel

The use case for this post is that a got a request from a customer where a commercial displays brightness, used for digital signage , should be put at a minimum when there is no people in the surroundings. 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. A nice explanation on how it works is found here .

If you are using Davis Personal/Professional weather stations (PWS) you will get a nice dashboard when you link your PWS to the Davis weatherlink (WL) site. What you probably really miss is a forecast displayed together with your PWS data. The picture is showing a part of the dashboard at pwsweather.com (PW) after you have linked your PWS to the site. 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.

Updated 2022-07-04 ! O n the same server/hardware you can have a test environment for Node-Red(NR), separated from production separated instances for different applications Setup will follow for a Raspberry Pi(RPi) including how to  auto start at power on. A post for NR quick install .

In former posts   I used the temperatur sensor DS18B20, in several applications, but now it was time for the boats exhaust temperature and checking out YDTC-13 from Yacht Devices (YDTC). ( But please note that the YDTC can be used in any temperature application.) When you are boating, using the engine, it's  very important that the cooling water  always is present otherwise major damages can follow.  In "wet exhaust" systems it's easy to get the temperature which I posted here .

Updated 2022-06-10 ! In other posts I  blogged about a way to measure temperature with a Raspberry Pi(RPi), direct connected or via WiFi , together with the marine applikation SignalK(SK). In this post I will follow up with a short brief about the practical solution, measuring exhaust temperature in a boat and sending an alarm if the temperature exceeds a set value . 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. If you wan't to avoid a RPi check  this post  with approved NMEA 2000 temperature sensors from Yacht Devices 

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.

I have written a post with the same subject before, also using NodeRed (NR), but this post is using the latest WeatherLink v2 API instead of the v1 API .  The v2 API supports more devices and now also including the old ones. If You want a more advanced weather site  this is  a very nice one coded in PHP also using the v2 API.

This post is written for those who runs Signal K(SK), or applications that indirect are using SK, and want to write log files that could be read for later use. 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".

In an other post  I explained how to access and edit the data on an USB attached drive with the Linux " standard"  ext4  filesystem.  In this post I will explain how to read, write or add files using Windows, File explorer, or Mac, Finder,  without third party software ! You "just" need a Linux machine, but since you want to access an ext4 filesystem there probably are a machine in the surroundings ? In this post I will use a "simple" Raspberry Pi(RPi) and the ext4 media attached to one of the USB ports.