Problems with sending udp packets
Posted: Thu Sep 24, 2015 12:13 pmIf I try to send UDP packets in my sketch, I have to put a delay(2); (below 2 does not work) into my loop function, otherwise the packet is never sent. If I put any delay directly after the endPacket(); call in the if condition (see below) it does not help at all, it has to be directly in loop.
As the code is somehow time critical, It would be awesome to omat those delay calls.
Any ideas?
Thanks in advance,
misterdanb
As the code is somehow time critical, It would be awesome to omat those delay calls.
Any ideas?
Code: Select all
void sendMessage(char message[])
{
#ifdef DEBUG
Serial.print("Sending data: ");
Serial.write(message, 5);
Serial.println();
#endif
udp.beginPacket(gameServer, gamePort);
udp.write(message, 5);
udp.endPacket();
}
void sendButtonsChanged(int newButtonStates)
{
char message[] = {
CMD_BUTTONS_CHANGED,
char(newButtonStates & 0xFF),
char((newButtonStates ^ buttonStates) & 0xFF),
0x00,
CMD_BUTTONS_CHANGED
};
sendMessage(message);
}
void sendKeepAlive()
{
char message[] = {
CMD_KEEP_ALIVE,
char(buttonStates & 0xFF),
0x00,
0x00,
CMD_KEEP_ALIVE
};
sendMessage(message);
}
void setup()
{
#ifdef DEBUG
Serial.begin(115200);
#endif
Cytrill.begin();
setupWifi();
}
void loop()
{
static int keepAliveCounter = 0;
int newButtonStates = Cytrill.getButtons();
if (newButtonStates != buttonStates)
{
sendButtonsChanged(newButtonStates);
buttonStates = newButtonStates;
}
if (keepAliveCounter == 2000)
{
sendKeepAlive();
keepAliveCounter = 0;
//delay(20); // not helping at all
}
else
{
keepAliveCounter++;
}
delay(2); // helps
Cytrill.loop();
}
Thanks in advance,
misterdanb