Error message project can be compile

Projects Programming
1

hi guy I have this code that had try several times to compile but unsucceful any help?
this is the code and the error message.

#include "Arduino.h"
//#include<SoftwareSerial.h>


// constants won't change. Used here to set a pin number:
const int TotransPin =  6;  // the number of the transistor base pin
#define droneSig 4 //..input signal from drone FC
 
//SoftwareSerial BTSerial(0, 1); // RX TX
// Variables will change:
int TransistorState = LOW;             // TransistorState used to set the Transistor

unsigned long previousMillis = 0;        // will store last time Transistor was updated

// varible to store time interval:
 long interval = 0;
// interval at which to blink (milliseconds)


void setTrans(String message);
String bluetoothData = ""; 
String getNextNumb(String text, int cursor);

void setup(){
  Serial.begin(9600);
  
  //set the digital pin as input:
  pinMode(droneSig, INPUT);
    // set the digital pin as output:
  pinMode(TotransPin, OUTPUT);
  }
// message tokens
const char START_TOKEN = '?';
const char END_TOKEN = ';';
const char DELIMIT_TOKEN = '&';
const int CHAR_TIMEOUT = 20;

bool waitingForStartToken = true;
String messageBuffer = "";
  
  //BTSerial.begin(9600);

  void loop() {
   char inchar ;
    
    if (Serial.available ()){
     if (waitingForStartToken){
       do {
        inchar = Serial.read();
      }
      while ((inchar != START_TOKEN) && Serial.available());
     if(inchar == START_TOKEN) {
       Serial.println("message start");
        waitingForStartToken = false;
      }
    }
     // read command
       if (!waitingForStartToken && Serial.available()){
        do{
          inchar = Serial.read();
          Serial.println(inchar);
          messageBuffer += inchar;
          
         }  while ((inchar != END_TOKEN) && Serial.available());
          if (inchar == END_TOKEN){
            messageBuffer = messageBuffer.substring(0, messageBuffer.length() - 1);
            Serial.println("massage complete - " + messageBuffer);
        *setTrans(messageBuffer);*
        messageBuffer = "";
        waitingForStartToken = true;
            }
            if (messageBuffer.length() > CHAR_TIMEOUT){
              Serial.println("message data timeout - " + messageBuffer);
              messageBuffer = "";
              waitingForStartToken = true;
           }
        }
      }
     
     if (isDigit(inchar)) {
      bluetoothData += (char)inchar;
           
           if (inchar == '\n') {
            interval = bluetoothData.toInt();
           }
         }
      
     /* while(bluetoothData = Serial.available());
     do  {
      interval = bluetoothData.toInt();
        }
    */
 // while(interval)
 // here is where you'd put code that needs to be running all the time.

  // check to see if it's time to turn the motor; that is, if the difference
  // between the current time and last time you turn the motor is bigger than
  // the interval at which you want to turn the motor.
  
   unsigned long currentMillis = millis();

   if (currentMillis - previousMillis >= interval) {
    // save the last time you turn the motor
    previousMillis = currentMillis;


 // if the motor is off turn it on and vice-versa:
    if (digitalRead(droneSig == HIGH) && (TransistorState == LOW)) 
     {   
     (TransistorState = HIGH);
    }
    
    else {
      TransistorState = LOW;
    }

    // set the LED with the ledState of the variable:
    digitalWrite(TotransPin, TransistorState);
    Serial.println("motor is turning.");
    }
    }

Arduino: 1.8.15 (Windows 8.1), Board: "Arduino Pro or Pro Mini, ATmega328P (5V, 16 MHz)"

In function loop': ino:68: undefined reference to setTrans(String)'
collect2.exe: error: ld returned 1 exit status
exit status 1
Error compiling for board Arduino Pro or Pro Mini.

2

You don't have the setTrans() function defined in the sketch, only the prototype for it

3

Hi @opk

The error is on line 68 --> *setTrans(messageBuffer); *
What did you want to do with this line?
If you copied the sketch from somewhere, review the copy.

RV mineirim

4

I am expecting that the asterisks were added by @opk to emphasise where the error was otherwise the error message would be different

5

SetTrans value to be set to messagaBuffer
value

6

setTrans is a function as declared here

void setTrans(String message);

but there is no function definition for it saying what the function should do, so you get the error. What do you want the setTrans() function to do ?

7

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