Add send and receive groups to json api

wled00/json.cpp

@@ -347,7 +347,9 @@ bool deserializeState(JsonObject root, byte callMode, byte presetId)
 
   JsonObject udpn      = root["udpn"];
   notifyDirect         = udpn["send"] | notifyDirect;
+  syncGroups           = udpn["sgrp"] | syncGroups;
   receiveNotifications = udpn["recv"] | receiveNotifications;
+  receiveGroups        = udpn["rgrp"] | receiveGroups;
   if ((bool)udpn[F("nn")]) callMode = CALL_MODE_NO_NOTIFY; //send no notification just for this request
 
   unsigned long timein = root["time"] | UINT32_MAX; //backup time source if NTP not synced
@@ -564,6 +566,8 @@ void serializeState(JsonObject root, bool forPreset, bool includeBri, bool segme
     JsonObject udpn = root.createNestedObject("udpn");
     udpn["send"] = notifyDirect;
     udpn["recv"] = receiveNotifications;
+    udpn["sgrp"] = syncGroups;
+    udpn["rgrp"] = receiveGroups;
 
     root[F("lor")] = realtimeOverride;
   }