serial monitor recognize commands

Projects Programming
1

what am I doing wrong?

I want to use the serial monitor to recognize commands.

First I want to start a commands "A_WAARDE" to start the A_WAARDE menu. Then I want a save a variable in variable A_WAARDE for example, "3.20".

So i type "A_WAARDE" ENTER
AND "3.20" ENTER

float A_WAARDE = 0;
int ECA_WAARDE = 0;

int MAX_CMD_LENGTH = 10;
char cmd[10];
int cmdIndex;
char incomingByte;

void setup() {
  // put your setup code here, to run once:

}

void loop() {
if (incomingByte=Serial.available()>0) {
      
      char byteIn = Serial.read();
      cmd[cmdIndex] = byteIn;
      
      if(byteIn=='\n'){
        //command finished
        cmd[cmdIndex] = '\0';
        Serial.println(cmd);
        cmdIndex = 0;

        //INSTELLINGEN

        if (ECA_WAARDE == 1){
HELP>>    A_WAARDE = cmd; //For example, "3.20"
          Serial.println(A_WAARDE); 
        } 
 
        if(strcmp(cmd, "A_WAARDE")  == 0){
          ECA_WAARDE = 1;
          Serial.println("ECA_WAARDE"); 
        } 
      }
  }
}
2

Your variable 'cmdIndex' never changes from 0. You put every input character in cmd[0] and then overwrite that with a null character.

3

I wonder what speed the serial line is running at.

incomingByte=Serial.available()>0

Hmmm.

4

I want to use the serial monitor to recognize commands.

That is NOT going to happen. The Serial Monitor application is pretty dumb. It can send serial data. It can display serial data that it gets. It can NOT do squat with the data that it gets.