Can i use adafruit motor shield for arduino v2.3 with this board?

I don’t see why you couldn’t be able to as long as the 𝐒hield has the shape of an uno. However I had to buy an uno because the processor architecture is different with the WiFi revision 2 because it uses a different chip. The program I wrote was unable to run on the WiFi revision 2 but worked fine on the uno revision 3

What’s the difference between this and the yun rev 2?

I think the revision 2 uses a different processor chip while the revision 1 uses the atmega328 which is the same as the uno

I got it to connect to my WiFi with a sketch but I can't get anything from 192.168.240.1 is this the rigth address?

It seems like you are using the previous version of the uno wifi. The uno wifi rev 2 doesn't have a web panel, in order to control the wifi connection you need to use the WIFI NINA library

ASIN	B07MK598QV
Best Sellers Rank	#31,226 in Computers ( See Top 100 in Computers ) #445 in Single-Board Computers
Item model number	ABX00021
Manufacturer	Arduino
Product Dimensions	8 x 5.8 x 2.3 cm; 40 g

Arduino Uno WiFi Rev2 - ABX00021

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