After some searching, there are a few access points (that I would run in client mode) with integrated antennas that look like they may have a higher gain antenna than the 9db antenna of the TP-Link CPE210 with which I have had partial success. I see:
- MikroTik SXTsq Lite2 (10 db antenna, about 35 EUR),
- LigoWave LigoDLB 2-14n (14 db antenna, about 100 EUR, but seemingly not available in Germany)
- Ubiquiti Nanobeam NBE-M2-13 (13 db antenna, about 95 EUR).
Unfortunately, it doesn't look like there is a stock OpenWRT image for any of these. Am I missing any device with support in stock OpenWRT images? For the MikroTik, it looks like it would be fairly easy to build an OpenWRT image. For the Uniquiti Nanobeam, it also looks like it might be possible.
My other option maybe be something like an ALFA Tube-2HP (65 EUR) as client/AP and a YAGI antenna with 12 db or 16 db gain (about 30 EUR). This would come with good OpenWRT support.
Any comments on this?