Any router which supports 802.11b should work and most of them do. We have successfully used:
- Apple Airport Express
- TP-Link WR700n
- TP-Link TL-MR3040 (battery powered)
- Verizon MiFi 4510
- Linksys E2000 (* had to turn off WiFi Protected Setup on the router in order to get reliable connections - with WiFi Protected Setup turned on the WiFi Link (in router mode) would sometimes not associate with the Linksys router.
- Linksys WRT54G2 (was set to Manual Setup - not WiFi Protected).
- Linksys AC1900 (works well in commercial buildings - can be used along with TP-Link TL-MR3040 routers (or Airport Express) to create large network for multi-fan testing).