I'm not prioritizing to look at the whole video, and the link to the list of commands used requires a login, but ecc ssh keys can be compared to a randomly generated password of 27 lower case characters, or a randomly generated password with 21 alphanumeric characters in lower and upper case.
To brute force such a password (or the comparable key) by trying 1,000 logins per second (which assumes your server doesn't use sshguard which would lock out such attempts) would take about 50 trillion trillion centuries on average.
I use ssh keys daily. Not really because the are more secure, but because they are more convenient. As long as you use sufficiently long passwords, password login is as secure as key login. If you use shorter passwords, ssh keys will give better protection.
Here is a guide to use a Yubikey for ssh login: https://developers.yubico.com/yubico-pam/YubiKey_and_SSH_via_PAM.html I used it myself on a test server back in 2007, but I have not used it after that.
@Martin_Smith Microwave backscatter can show rain out to some distance. At airports an optical method is used as it also covers fog and snow. It really comes down to why you want to measure distance in rainy days and what sort of distance you intend or need to cover.....
@Westie That feature can also be used with the Arduino Nano, or any other ATmega328P-based board.
I had NRF24 + RFM69 running for a couple of days using a Nano as an Ethernet MQTT gateway and it worked fine as far as I remember.
Reporting back: I installed the Gen2 Emporia Vue, and it "just works" on the first try. Ironically, it reports the same amount of power for my refrigerator as the far less expensive TopGreener power module, so I guess the TopGreener is more accurate than what I had thought. At least the Emporia Vue's built in graphing is far superior and involves no switching, so overall I'm glad I made the upgrade.
@Julie-Adam Have you considered disconnecting the air-line from the controller and reconnecting it to the air-head ?
The cranium woodframe is probably interrupting signals which possibly
explains the coupon fascination...