You didn’t really state what your requirements are, so it is hard to give specific advice. Last year, I faced a similar quandary. I was creating a freeze protection system for an outdoor faucet. While it didn’t really need to be internet connected, I wanted to keep an eye on it without having to go to the physical location, which is far from where I spend most of my time.
Since the data rate is low, one update every 30s, many solutions would have worked. I thought about using nrf24l01, but there was not a lot of support for it at the time. Since I already had a working system that used an internet connection and a CANxtra module with an Ethernet connection, I just needed a way to hook it up. Since the location was 65’ from a network connection and I did not want to dig a trench that long, I figured Wi-Fi was the answer. For Black-Friday last year, I got a really good deal on the TP-LINK TL-WR702N Wireless N150 Travel Router, Nano. It works great as a Wi-Fi to Ethernet adapter. It draws enough current that I have to use it’s own power supply and not the USB host port on the CANxtra. It appears that the two devices together draw 2-3W, which is more that I would like, but not so much that I have been motivated enough to do something about it.
The 702 has been really reliable, I can’t say the same about the first router I had at the other end. It would need to be rebooted every month or so. I ended up replacing it with the wr740 and while the UI on this is not great and it wasn’t designed to be just an access point, it does the job quite well. As a bonus, I now have Wi-Fi at the barnyard