FWIW this is similar to what @WBegg uses and is what I am going to purchase. Decent power, can be used as a portable power bank for other purposes too, no need for a separate charging device/alligator clips/etc. Small enough to throw in a waterproof box...
Awesome details, thanks folks. Side related question... if instead of using the A/C PSU I just used a 12V battery (either the one WBegg uses or the scooter one Bryan likes), does that change anything? I presume the voltage loss concerns are the same but is the added noise still in play?
I'll...
Any concerns with using a DC barrel type power extension like this in between the Triad PSU and the HM? Was planning on buying a 12' to simplify my power setup during questionable weather.
https://www.amazon.com/dp/B00FTFYH0U/?tag=tvwb-20
An FYI for those looking for a case for a HM 4.2 with Raspberry Pi Zero W (RPi Zero W); the 2line-TC-Rpi-A+ or 2line-probe-Rpi-A+ cases work as is, as does the Heater Meter 4.2 Sliding Back Case located at https://www.thingiverse.com/thing:1401249