Documentation not great, nor the implimentation.
For Solar Powered WiFi Weather Station V3.3
The published code doesn't work, as Blynk has been broken by Blynk 2.0. I did manage to get updated code from the vendor, but there is much still missing from the documentation - e.g. board type etc. Also, it reports windspeed but there is no indication of units. The documentation isn't clear on this, I'm pretty sure it's not m/s as if so there is currently a hurricane here!
After getting the unit to work, and report to Thingspeak, I discovered it stopped sending temp, humidity, pressure (but was still online, and reporting windpseed, direction, and battery voltage) to thingspeak after 24 hours. There is no way to reboot it without getting a ladder out, so it's really not a practical device to leave on a roof. Rebooting it did in the end bring it back online and start it reporting again.
Given that the reason you're probably looking at a solar/battery weatherstation is to use it in a remote location, this makes it slightly useless (at least to me). I'm going to see if I can get a cable up there and do a PoE RPI weatherstation instead.