WiFi: Add wifiStationEnabled and wifiUpdateSettings

The routines setup and menuWiFi call wifiUpdateSettings to determine if
the SSIDs are available for WiFi station and soft AP and trigger a WiFi
station restart.

The wifiStationEnabled determines if the WiFi station state machine
should start.

Author: LeeLeahy2

Firmware/RTK_Everywhere/Developer.ino

@@ -220,6 +220,7 @@ bool wifiSoftApOn(const char * fileName, uint32_t lineNumber) {return false;}
 bool wifiStationOff(const char * fileName, uint32_t lineNumber) {return true;}
 bool wifiStationOn(const char * fileName, uint32_t lineNumber) {return false;}
 void wifiStopAll()                              {}
+void wifiUpdateSettings()                       {}
 void wifiVerifyTables()                         {}
 
 #endif // COMPILE_WIFI

Firmware/RTK_Everywhere/RTK_Everywhere.ino

@@ -878,7 +878,7 @@ unsigned long loraLastIncomingSerial; // Last time a user sent a serial command.
 
 // Display boot times
 //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-#define MAX_BOOT_TIME_ENTRIES 41
+#define MAX_BOOT_TIME_ENTRIES 42
 uint8_t bootTimeIndex;
 uint32_t bootTime[MAX_BOOT_TIME_ENTRIES];
 const char *bootTimeString[MAX_BOOT_TIME_ENTRIES];
@@ -1258,6 +1258,9 @@ void setup()
     DMW_b("beginIdleTasks");
     beginIdleTasks(); // Requires settings. Enable processor load calculations
 
+    DMW_b("wifiUpdateSettings");
+    wifiUpdateSettings();
+
     DMW_b("networkBegin");
     networkBegin();
 

Firmware/RTK_Everywhere/WiFi.ino

@@ -381,6 +381,9 @@ static int wifiFailedConnectionAttempts = 0; // Count the number of connection a
 static bool wifiReconnectRequest; // Set true to request WiFi reconnection
 
 const char * wifiSoftApName = "Soft AP";
+bool wifiSoftApSsidSet; // Set when the WiFi soft AP SSID string exists
+bool wifiStationRestart; // Restart Wifi station
+bool wifiStationSsidSet; // Set when one or more SSID strings exist
 
 // Start timeout
 static uint32_t wifiStartTimeout;
@@ -435,11 +438,13 @@ void menuWiFi()
             // If we are modifying the SSID table, force restart of WiFi
             wifiRestartRequested = true;
             wifiFailedConnectionAttempts = 0;
+            wifiUpdateSettings();
         }
         else if (incoming == 'a')
         {
             settings.wifiConfigOverAP ^= 1;
             wifiRestartRequested = true;
+            wifiUpdateSettings();
         }
         else if (incoming == 'c')
         {
@@ -791,6 +796,57 @@ void wifiStartThrottled(NetIndex_t index, uintptr_t parameter, bool debug)
         networkSequenceNextEntry(NETWORK_WIFI_STATION, debug);
 }
 
+//*********************************************************************
+// Determine if WiFi should be running
+bool wifiStationEnabled(const char ** reason)
+{
+    bool enabled = false;
+    static char * reasonBuffer;
+
+    do
+    {
+        // Verify that at least one SSID value is set
+        if (wifiStationSsidSet == false)
+        {
+            *reason = "SSID not available";
+            break;
+        }
+
+        // Determine if Wifi is begin restarted
+        if (wifiStationRestart)
+        {
+            wifiStationRestart = false;
+            *reason = "restart requested";
+            break;
+        }
+
+        // Is WiFi the highest priority
+        if (networkIsHighestPriority(NETWORK_WIFI_STATION) == false)
+        {
+            // Allocate the reason buffer once
+            if (reasonBuffer == nullptr)
+                reasonBuffer = (char *) rtkMalloc(64, "WiFi reasonBuffer");
+
+            // Build the reason
+            if (reasonBuffer)
+            {
+                sprintf(reasonBuffer,"is lower priority than %s", networkGetCurrentInterfaceName());
+                *reason = reasonBuffer;
+            }
+
+            // Allocation failed
+            else
+                *reason = "is lower priority";
+            break;
+        }
+
+        // WiFi should start and continue running
+        enabled = true;
+        *reason = "is enabled";
+    } while (0);
+    return enabled;
+}
+
 //*********************************************************************
 // Get the state name for WiFi station
 const char * wifiStationGetStateName(uint8_t state)
@@ -1031,6 +1087,29 @@ void wifiWaitNoUsers(NetIndex_t index, uintptr_t parameter, bool debug)
     }
 }
 
+//*********************************************************************
+// Determine if any of the WiFi station SSID values are set
+void wifiUpdateSettings()
+{
+    bool ssidSet;
+
+    // Verify that at least one SSID is set
+    ssidSet = false;
+    for (int index = 0; index < MAX_WIFI_NETWORKS; index++)
+        if (strlen(settings.wifiNetworks[index].ssid))
+        {
+            ssidSet = true;
+            break;
+        }
+
+    // Remember the change in SSID values
+    wifiStationSsidSet = ssidSet;
+    wifiStationRestart = ssidSet;
+
+    // Determine if the WiFi soft AP SSID string is present
+    wifiSoftApSsidSet = (wifiSoftApSsid && strlen(wifiSoftApSsid));
+}
+
 //*********************************************************************
 // Verify the WiFi tables
 void wifiVerifyTables()