Posts

Showing posts from November, 2022

Calculate wind using U and V GRIB components, NodeRed, JS

Image
Updated 2022-11-28 ! In a former post I showed how to download and extract data from forecast GRIB files but avoided to handle if the wind direction and speed was declared as U and V components, vectors.  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. Normally, using charts in NodeRed, the timestamp is taken from the time when the input message is created but here I will use the timestamp from the forecast, loading the whole chart in one go.

Speedtest LAN and Internet/WAN, iperf3

Image
Updated 2022-11-06 ! Sometimes I'm a little confused if it's the local network that is the bottleneck or if the ISP, Internet Service Provider, is slow. In a former post I used 2 applikations to get the information, from both the local LAN and Internet, but on the other hand it maybe hade been nice with a more lightweight approach.  From  this post  I got inspiration and discovered a nice little  application " iperf3 "  which  is available for several OS .

Popular posts, last 30 days

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

iCloud drive sync, or mount, with a Linux, Ubuntu, device

Installing Ubuntu 24.04 or 24.10/25.04 on an old MacBook Air(2011)

IVT, Bosch heat pump easy integration, Home Assistant

Home Assistant with VirtualBox or Proxmox or Linux KVM ???

Clone the Raspberry boot disk

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

NetworkManager UI and access point, hotspot

SeaTalk1 to NMEA 0183 converter, DIY

IKEA Bäve dimmer hack II