RS-232 with displays & AV equipment

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.

Davis PWS linked to pwsweather.com

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.

Node-Red multiple instances, RPi

Updated 2022-07-04 !

On 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.