ESP8266 Community Forum

- Thu Apr 14, 2016 1:35 am #45459 I wish to serve a web page that includes the ESP8266 received signal strength. wifi.ap.getap() should be able to do this for me, but it seems to run asynchronously, i.e. the program continues whilst the function is running (it can take a significant period of time). This code illustrates the problem

Code: Select allfunction Getss()
    Config = {}
    Config.ssid = "myssid"
    Config.channel = 4
    wifi.setmode(wifi.STATION)
    wifi.sta.getap(Config, function(t)
        SigStrength = "No signal"
       for k,v in pairs(t) do
          if k == "myssid" then
             SigStrength = string.sub(v, 3, 5) .. " dbm"
             break
          end
       end
       print("Signal strength: " .. SigStrength)
    end)
end

Getss()
print("fred")


I would expect an output like this

Code: Select all> dofile("SigStrength.lua");
> Signal strength: -29 dbm
fred


But I get

Code: Select all> dofile("SigStrength.lua");
fred
> Signal strength: -29 dbm


In the actual code, I want the function to return the signal strength so that it can be inserted into the HTML, but this problem causes an attempt to insert null data into the string.
Any ideas?

- Thu Apr 14, 2016 3:05 am #45460 The function wifi.sta.getrssi() was recently added to the dev branch and should help you accomplish your goal.

- Sat Apr 23, 2016 6:22 am #46033 Thanks.

- Sat Apr 23, 2016 9:38 pm #46057 No problem