Hello, I am building a data-logger for a 'seismograph' on a RPI-2 running Centos 7. Wireless is working, with another wireless usb adapter, but since this one is going to sit in a barn, I need a longer range wifi antenna. The OS sees the device, and ifconfig shows a MAC address, but somehow it doesn't seem to come up. It does work on "regular" Centos 6, running on a laptop, no issues at all. any ideas? (I put some of the details below, it's wlan1 I am trying to make work) 9Not running anything IPV6, so don't know why that module was loaded.) thanks, Ron [root at rpi2-1 ~]# uname -a Linux rpi2-1 3.18.14-v7+ #794 SMP PREEMPT Sun Jun 7 12:50:51 BST 2015 armv7l armv7l armv7l GNU/Linux [root at rpi2-1 ~]# lsusb Bus 001 Device 007: ID 148f:3072 Ralink Technology, Corp. RT3072 Wireless Adapter [root at rpi2-1 ~]# ifconfig -a . . . wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.2.4 netmask 255.255.255.0 broadcast 192.168.2.255 inet6 fe80::76da:38ff:fe6d:da2 prefixlen 64 scopeid 0x20<link> ether 74:da:38:6d:0d:a2 txqueuelen 1000 (Ethernet) RX packets 267 bytes 32204 (31.4 KiB) RX errors 0 dropped 2 overruns 0 frame 0 TX packets 227 bytes 39749 (38.8 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 wlan1: flags=4098<BROADCAST,MULTICAST> mtu 1500 ether e8:4e:06:58:1b:97 txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 [root at rpi2-1 ~]# lsmod Module Size Used by arc4 1745 2 rt2800usb 17886 0 rt2800lib 71839 1 rt2800usb rt2x00usb 8517 1 rt2800usb rt2x00lib 36704 3 rt2x00usb,rt2800lib,rt2800usb mac80211 479583 3 rt2x00lib,rt2x00usb,rt2800lib cfg80211 386516 2 mac80211,rt2x00lib crc_ccitt 1153 1 rt2800lib rfkill 16651 2 cfg80211 ftdi_sio 30912 0 8192cu 528365 0 usbserial 22425 1 ftdi_sio uio_pdrv_genirq 2958 0 uio 8119 1 uio_pdrv_genirq i2c_bcm2708 5006 0 i2c_dev 6027 0 ipv6 333976 26