Can't find Wifi network

[wdt]

This does not make sense, you say that you can see other access points,
"iwlist scan" should see them,, for example, this desktop (same with PBP)

# iwlist scan |grep ESSID
lo Interface doesn't support scanning.

ESSID:"dlink-8A1C"
---15 other lines, other access points--
ESSID:"my_ap"
eth0 Interface doesn't support scanning.

But, ip a shows the wifi interface, you say

dmesg |grep brcm --(for wifi chip BCM345/9)--