iwinfo-p870hnu-51b

root@OpenWrt:~# iwinfo
wlan0     ESSID: "OpenWrt"
          Access Point: 28:28:5D:3A:B8:29
          Mode: Master  Channel: 11 (2.462 GHz)
          Tx-Power: 20 dBm  Link Quality: unknown/70
          Signal: unknown  Noise: unknown
          Bit Rate: unknown
          Encryption: none
          Type: nl80211  HW Mode(s): 802.11bg
          Hardware: unknown [Generic MAC80211]
          TX power offset: unknown
          Frequency offset: unknown
          Supports VAPs: no  PHY name: phy0