local bgscan_mode, bgscan_short_interval, bgscan_long_interval, bgscan_sst
        local function write_bgscan(self, section)
                local mode = bgscan_mode:formvalue(section)
                local sinv = bgscan_short_interval:formvalue(section)
                local linv = bgscan_long_interval:formvalue(section)
                local ssth = bgscan_sst:formvalue(section)
                local file = "/var/run/wpa_supplicant-"..wnet:id()..".bgscan"
                local value
                if mode == "simple" then
                        value = "%s:%d:%d:%d" %{ "simple", sinv or 1, ssth or -60, linv or 10 }
                else
                        value = "%s:%d:%d:%d:%s" %{ "learn", sinv or 1, ssth or -60, linv or 10, file }
                end
                self.map:set(section, "bgscan", value)
                if mode == "none" then self.map:del(section, "bgscan") end
        end


        bgscan_long_interval = s:taboption("advanced", Value , "bgscan_long_interval", translate("Long Interval (in secs)"))
        bgscan_long_interval:depends({bgscan_mode="simple"})
        bgscan_long_interval:depends({bgscan_mode="learn"})
        bgscan_long_interval.default = "10"
        bgscan_long_interval.datatype = "range(10,300)"
        bgscan_long_interval.write = write_bgscan
        bgscan_long_interval.remove = write_bgscan

        bgscan_sst = s:taboption("advanced", Value , "bgscan_sst", translate("Signal Strength Threshold"))
        bgscan_mode:depends({mode="sta-wds"})
        bgscan_mode.default = "simple"
        bgscan_mode:value(  "none", translate("Disabled"))
        bgscan_mode:value("simple", translate("Simple"))
        bgscan_mode:value( "learn", translate("Learn"))
        bgscan_mode.write = write_bgscan
        bgscan_mode.remove = write_bgscan

        bgscan_short_interval = s:taboption("advanced", Value , "bgscan_short_interval", translate("Short Interval (in secs)"))
        bgscan_short_interval:depends({bgscan_mode="simple"})
        bgscan_short_interval:depends({bgscan_mode="learn"})
        bgscan_short_interval.default = "1"
        bgscan_short_interval.datatype = "range(1,300)"
        bgscan_short_interval.write = write_bgscan
        bgscan_short_interval.remove = write_bgscan

        bgscan_long_interval = s:taboption("advanced", Value , "bgscan_long_interval", translate("Long Interval (in secs)"))
        bgscan_long_interval:depends({bgscan_mode="simple"})
        bgscan_long_interval:depends({bgscan_mode="learn"})
        bgscan_long_interval.default = "10"
        bgscan_long_interval.datatype = "range(10,300)"
        bgscan_long_interval.write = write_bgscan
        bgscan_long_interval.remove = write_bgscan

        bgscan_sst = s:taboption("advanced", Value , "bgscan_sst", translate("Signal Strength Threshold"))
        bgscan_sst:depends({bgscan_mode="simple"})
        bgscan_sst:depends({bgscan_mode="learn"})
        bgscan_sst.default = "-60"
        bgscan_sst.datatype = "range(-90,-10)"
        bgscan_sst.write = write_bgscan
        bgscan_sst.remove = write_bgscan

        scan_freq = s:taboption("advanced", MultiValue , "scan_freq", translate("Scanned Freq(s)"))
        scan_freq:depends({mode="sta"})
        scan_freq:depends({mode="sta-wds"})
        scan_freq.default = "2412 2437 2462"
        scan_freq.delimiter = " "
        scan_freq.widget = "checkbox"
        for _, f in ipairs(iw and iw.freqlist or { }) do
                if not f.restricted then
                scan_freq:value(f.mhz, translate("%i (%i Mhz)" %{f.channel, f.mhz}))
                end
        end