I have this following code, which is working for any string to send and receive hello world. But how can i send specific string and use if then else ?
for example, when i send following its always sending hello world only but how can i do
echo "command1" | nc -4u localhost 21
echo "command2 | nc -4u localhsot 21
on receive i want to parse them with if then else but its not working:
if ( packetBuffer == "command1" ) {
else if ( packetBuffer == "command2") {
} else {
}
code:
#include <SPI.h>
#include <Ethernet.h>
#include <EthernetUdp.h>
byte mac[]={0xDE, 0xAD, 0xBE, 0xEF, 0xAD, 0xDE};
IPAddress ip(192,168,1,2);
unsigned int localPort = 21;
char packetBuffer[UDP_TX_PACKET_MAX_SIZE];
char ReplyBuffer[] = "hello world";
EthernetUDP Udp;
char r1[] = "1";
char r2[] = "2";
char r3[] = "3";
void setup() {
Ethernet.begin(mac,ip);
Udp.begin(localPort);
}
void loop() {
int packetSize = Udp.parsePacket();
if(packetSize) {
Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
Udp.read(packetBuffer,UDP_TX_PACKET_MAX_SIZE);
Udp.write(packetBuffer);
if ( !strcmp(packetBuffer, "command1") ) {
Udp.write(r1);
} else if ( !strcmp(packetBuffer, "command2") ) {
Udp.write(r2);
} else {
Udp.write(r3);
}
Udp.endPacket();
}
delay(10);
}