Make AP more friendly in congested WiFi situations

src/main.cpp

@@ -6,6 +6,8 @@
 #include <WiFiMulti.h>
 #include <SPIFFS.h>
 
+#include <esp_wifi.h>
+
 #include <freertos/FreeRTOS.h>
 #include <freertos/semphr.h>
 
@@ -188,20 +190,20 @@ static void ledFSM(void)
 
       animController.loop();
 
-      if(((WiFi.status() == WL_CONNECTED) || (WiFi.getMode() == WIFI_MODE_AP)) &&
-          udpProto.check()) {
-        // UDP packet received -> transition to UDP state
-        nextState = UDP;
-        ledState = TRANSITION;
-        // ensure the correct animation plays after UDP transfers stop
-        animController.changeAnimation(loadSavedAnimation(), false);
-      }
-
-      // change to last used animation after some time
-      if((millis() - stateEnteredTime) > 60000) {
+      // change to last used animation or UDP visualization after some time
+      if((millis() - stateEnteredTime) > 30000) {
+        // load the saved animation
         // FIXME: does not work with transition because of restart() call in ANIMATION state
         animController.changeAnimation(loadSavedAnimation(), false);
-        ledState = ANIMATION;
+
+        if(((WiFi.status() == WL_CONNECTED) || (WiFi.getMode() == WIFI_MODE_AP)) &&
+            udpProto.check()) {
+          // UDP packet received -> transition to UDP state
+          nextState = UDP;
+          ledState = TRANSITION;
+        } else {
+          ledState = ANIMATION;
+        }
       }
       break;
 
@@ -383,6 +385,10 @@ void wifi_setup(void)
     WiFi.mode(WIFI_AP);
     WiFi.softAPConfig(apIP, apIP, IPAddress(255, 255, 255, 0));
     WiFi.softAP("🕯️💡☀️", "Licht234");
+    WiFi.setTxPower(WIFI_POWER_2dBm);
+    esp_wifi_set_bandwidth(WIFI_IF_AP, WIFI_BW_HT20);
+    esp_wifi_config_11b_rate(WIFI_IF_AP, true);
+    esp_wifi_set_protocol(WIFI_IF_AP, WIFI_PROTOCOL_11N);
     WiFi.enableAP(true);
 
     animController.changeAnimation(std::unique_ptr<Animation>(new ConnectionEstablishedAnimation(&ledFader, false)));