Hi, I found situation that once Spark.sleep() called, UDP packets cannot be sent.
Here is my circumstance.
0 sec: Program Started
10 sec : Send UDP packet --> Server Recived
20 sec: Spark.sleep (10 sec)
30 sec: Spark woke up, Connecting to WiFi --> I confirmed it is connected. (from Access Point config)
90 sec: If WiFi.ready() ==true -> Serial.print & Send UDP packet --> Server didn’t receive UDP packet.
Even if WiFi.ready()==true, UDP packet didn’t sent.
Can anybody help me understanding this situation?
Thanks for your help.