i am trying to use openwrt (actuell trunk) with my m6416a router for home automation. I connected my air quaility USB Stick to the router. To read the air quality values a use a home automation system, called “FHEM” on the mini router. The router is very unstable in reading these values from the USB Stick, i get many read errors, sometimes the router looses connection to the air quality stick. I have already tried different passive USB-HUB’s. With some hubs i will get no connection, with other hub’s i get a non reliable connection. I have tried also active USB-Hubs, same situation. Did you have any hints for me ? I have heard that the AR9331 chipset is known for USB Problem’s. Is that true ? For now i use a power supply with 2 Ampere.