Hi. I too use the little TL-Link router as a WiFi client to my Arduino and it works well in general as stated. But it does tend to cause issues with my AT&T RG (Residential Gateway) aka cable modem. When I power up the TL while connected to my Arduino running a sketch that uses Ethernet.DHCP (I am including that detail in case in might be a clue as to the problem) it causes the RG to drop IP connectivity to all other WiFi devices such as laptops. When I power it off, IP returns most of the time, but many times I must reset the RG to get back to normal operation. Question: is operating the TL-Link in client mode causing an undesirable side-effect on home Internet gateways (which are really routers themselves of course)? I have heard talk on the AT&T fora that one cannot operate a router "behind" the RG router. Thanks.