How to code serial monitor options

Other Hardware LEDs and Multiplexing
1

hey i am trying to code something that would let me change values of certain variables. so far i have a enter password to unlock menu and this is the code for it. my question is how would i add a option menu after? if password is correct display menu kind of system. and how do i change value of eg. temp A or temp B to what i want through serial input

{
 if( password());
  
  bool password (){
   if (Serial.available() > 0) {     //wait for data available
    String teststr = Serial.readString();  //read until timeout
  	Serial.println(teststr + "\n");
    teststr.trim();                        // remove any \r \n whitespace at the end of the String
    if (teststr == "open") {
      Serial.println("correct!");
      
    } else {
      Serial.println("wrong password, try again");
    }
    }}
2

This sounds like a totally separate question(but keep it here, don't fire up a separate topic). Instead, let's answer A) menu and B)variable changes

But first, show us your whole code, not just a snippet. Impossible to figure out context.
Finally, please read
How to get the best out of this forum

1 Like
3

You may want to read this before you proceed:-
how to get the best out of this forum

We require you to post ALL your code and a schematic of what you have along with what your project is trying to achieve. Also what you code does against what you expect it to do.
At the moment if you do not press anything on the keyboard you will just get it printing

"wrong password, try again"

Over and over.

1 Like
5

So this function is supposed to return a bool type variable but in fact it returns nothing because it has no return instruction in it.

None of your functions can do anything because they can never be called.

Don't vandalise your own thread, this is the code you posted:-

int Bseconds;
int Cseconds;
char rx_byte = 0;
String rx_str = "";
boolean not_number = false;
int result;

void setup() {
  Serial.begin(9600);
  Serial.println("enter password");
 
}


void loop()
{
  password();
}
  
  
  
  bool password (){
  
    if (Serial.available() > 0) {     //wait for data available
    String teststr = Serial.readString();  //read until timeout
  	Serial.println(teststr + "\n");
    teststr.trim();                        // remove any \r \n whitespace at the end of the String
    if (teststr == "open") {
      Serial.println("correct!");
      
    } else {
      Serial.println("wrong password, try again");
    }
    }}


void choicemenu()
{
  int menuChoice = Serial.parseInt();
      
       switch (menuChoice) {
    case 1:
      // temp sensor code goes here
      Serial.print("A seconds is : ");
      Serial.println(Aseconds);
      break;

    case 2:
      // humidity sensor code goes here
      Serial.print("B seconds is : ");
      Serial.println(Bseconds);
      break;

    case 3:
      // pressure sensor code goes here
      Serial.print("C seconds is : ");
      Serial.println(Cseconds);
         break;}
}

void  As()
{
    if (Serial.available() > 0) {    // is a character available?
    rx_byte = Serial.read();       // get the character
    
    if ((rx_byte >= '0') && (rx_byte <= '9')) {
      rx_str += rx_byte;
    }
    else if (rx_byte == '\n') {
      // end of string
      if (not_number) {
        Serial.println("Not a number");
      }
      else {
        // multiply the number by 1
        result = rx_str.toInt() * 1;
        // print the result
        Serial.print(rx_str);
        Serial.print(" x 1 = ");
        Serial.print(result);
        Serial.println("");
        Serial.println("Enter a number to change value A.");
      }
      not_number = false;         // reset flag
      rx_str = "";                // clear the string for reuse
    }
    else {
      // non-number character received
      not_number = true;    // flag a non-number
    }
  } // end: if (Serial.available() > 0)
}


void  Bs()
{
    if (Serial.available() > 0) {    // is a character available?
    rx_byte = Serial.read();       // get the character
    
    if ((rx_byte >= '0') && (rx_byte <= '9')) {
      rx_str += rx_byte;
    }
    else if (rx_byte == '\n') {
      // end of string
      if (not_number) {
        Serial.println("Not a number");
      }
      else {
        // multiply the number by 1
        result = rx_str.toInt() * 1;
        // print the result
        Serial.print(rx_str);
        Serial.print(" x 1 = ");
        Serial.print(result);
        Serial.println("");
        Serial.println("Enter a number to chnage value B.");
      }
      not_number = false;         // reset flag
      rx_str = "";                // clear the string for reuse
    }
    else {
      // non-number character received
      not_number = true;    // flag a non-number
    }
  } // end: if (Serial.available() > 0)
}

void  cs()
{
    if (Serial.available() > 0) {    // is a character available?
    rx_byte = Serial.read();       // get the character
    
    if ((rx_byte >= '0') && (rx_byte <= '9')) {
      rx_str += rx_byte;
    }
    else if (rx_byte == '\n') {
      // end of string
      if (not_number) {
        Serial.println("Not a number");
      }
      else {
        // multiply the number by 1
        result = rx_str.toInt() * 1;
        // print the result
        Serial.print(rx_str);
        Serial.print(" x 1 = ");
        Serial.print(result);
        Serial.println("");
        Serial.println("Enter a number to chnage value c");
      }
      not_number = false;         // reset flag
      rx_str = "";                // clear the string for reuse
    }
    else {
      // non-number character received
      not_number = true;    // flag a non-number
    }
  } // end: if (Serial.available() > 0)
}
6

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.