Exact same problems. You keep referring to a "manual", which I would love, but can only find this (and the main Netatmo) conversation.
I've been to your Git site and downloaded the latest (4 days ago) files and icons. Put them in their correct folders and still get the same results as OP. Only difference is, now that I've installed the new files over the original App Store 18.227 version, I am no longer getting the square, colored icons - the web page is instructing the loading of no_icon.png icons <img src="skins/default/img/devices/device_states/no_icon.png" onerror="this.src='skins/default/img/devices/device_states/no_icon.png';" style="width: 60px; height: 60px;">
. All of the correct values show up for all of my devices in the main Netatmo device, but none of the devices show data or icons correctly.
Thanks in advance,
Randy