void wifiTimer_Tick(GT.Timer timer)
{
Debug.Print("wifiTimer start - currentAP " + (currentAP != null ? currentAP.SSID : "(null)") + " wifiUp " + wifiConnected + (wifiConnected ? " IP " + wifi.Interface.NetworkInterface.IPAddress : ""));
if (sp != null)
{
var spMessage = BroadcastMessageWithNewline;
sp.Write(spMessage, 0, spMessage.Length);
}
if (SkipWifiTimer())
{
Debug.Print("aborting wifitimer tick since SkipWifiTimer delegate is true");
return;
}
if (wifiConnected && currentAP == null)
{
Debug.Print("ERROR: wifi is up but current AP is null! Disconnecting.");
currentAP = null;
wifiConnected = false;
SetLed();
SetScreen();
wifi.Interface.Disconnect();
WebServer.StopLocalServer();
return;
}
if (currentAP != null && !wifiConnected)
{
wifiUpTime++;
if (wifiUpTime == wifiUpTimeout)
{
Debug.Print("WARN: starting wifi for " + currentAP.SSID + " timeout - resetting currentAP");
currentAP = null;
wifiConnected = false;
SetLed();
SetScreen();
wifi.Interface.Disconnect();
WebServer.StopLocalServer();
return;
}
}
if (wifiConnected && currentAP != null && APDetails.IsSetupAP(currentAP))
{
if (GT.Timer.GetMachineTime() - joinTime > maxTimeOnSetupNetwork)
{
Debug.Print("Disconnecting from setup AP due to timeout (setup should not take this long)");
currentAP = null;
wifiConnected = false;
SetLed();
SetScreen();
wifi.Interface.Disconnect();
WebServer.StopLocalServer();
return;
}
else
{
// only sending unsolicited beacons when we're not on the home network
Debug.Print("Sending unsolicited UDP beacon since we're on a setup network");
SendUDPBroadcast(BeaconPort);
}
}
if (wifiConnected && currentAP != null)
{
if (!WebServer.IsRunning()) WebServer.StartLocalServer(wifi.Interface.NetworkInterface.IPAddress, 80);
}
// skip scanning when connected since it fails
if (currentAP == null)
{
try
{
var scan = wifi.Interface.Scan();
Thread.Sleep(1);
foreach (var ap in scan)
{
Debug.Print("Scanned AP " + ap.SSID + " rssi " + ap.RSSI);
}
if (scan != null) foreach (APDetails knownAP in wifiNetworks)
{
// APs are in priority order, so break once we see the current ap
if (knownAP.Matches(currentAP)) break;
WiFiNetworkInfo joinAP = null;
foreach (var scanAP in scan)
{
if (!knownAP.Matches(scanAP)) continue;
if (joinAP == null) joinAP = scanAP;
if (joinAP.RSSI > scanAP.RSSI) joinAP = scanAP; // lower RSSI is better
}
if (joinAP == null) continue;
try
{
if (currentAP != null)
{
Debug.Print("Disconnecting from WiFi network " + currentAP + " to join " + joinAP.SSID);
wifi.Interface.Disconnect();
}
//// stop pictimeout and any streaming since wifi join operation hogs processor
//picTimeout.Stop();
//camera.StopStreamingBitmaps();
joinTime = GT.Timer.GetMachineTime();
Debug.Print("Joining WiFi network " + joinAP.SSID + " rssi " + joinAP.RSSI);
//wifi.Interface.();
currentAP = joinAP;
SetLed();
SetScreen();
wifi.Interface.Join(joinAP, knownAP.Key);
//Debug.Print("Joined WiFi network " + scanAP.SSID);
wifiUpTime = 0;
break;
}
catch
{
Debug.Print("Error joining wifi network: " + joinAP.SSID);
wifi.Interface.Disconnect();
timer.Stop();
timer.Start();
currentAP = null;
SetLed();
SetScreen();
break;
}
}
}
catch (GHI.Premium.Net.NetworkInterfaceExtensionException wex)
{
wifi.Interface.Disconnect();
// restart the timer to prevent it immediately firing again
timer.Stop();
timer.Start();
Debug.Print("Error scanning wifi networks: " + wex);
currentAP = null;
setLedError();
setScreenError();
}
}
Debug.Print("wifiTimer end - currentAP " + (currentAP != null ? currentAP.SSID : "(null)") + " wifiUp " + wifiConnected);
}
