Serial Printing Duplicate entries

i using serial send commands arduino, works fine except after every command sent duplicates previous input.
example:
send 1: s085       received: s085
send 2: e100       received: s085
send 3: e095       received: e095
send 4: q045       received: e095
send 5: q045       received: e045
etcetc


this current code:

code: [select]


char buffer[5];
byte bufferindex = 0;
long number = 0;


void setup() {
 serial.begin(115200);
}

void loop() {
 while (serial.available())
{readserialdata(serial.read());}
 
}


void readserialdata(char inchar) {
 
 //if buffer full, reset
 if (bufferindex == 5) {bufferindex = 0; number = 0;}
 //if first character 's', continue, increment
 if (bufferindex == 0 && ( inchar == 's' ||  
                           inchar == 'e' ||  
                           inchar == 'w' ||  
                           inchar == 'q' ||  
                           inchar == 'r')){
     buffer[bufferindex] = inchar;
     bufferindex++;}
  //if reading inputs 1-3 , input numeric, set value, increment
if (bufferindex >= 1 && bufferindex <= 4 &&  inchar >= '0' && inchar <= '9')
    {number = number * 10 + (inchar - 48); bufferindex++;}  
     //if buffer encoded, execute command; in case display output
     if (bufferindex == 4) {
     // movement(buffer[0], number);  //this payload
        serial.print("your input is: ");//delete after testing
        serial.print(buffer[0]); //delete after testing
        serial.println(number);//delete after testing
      }}

edit: code edited clarity

any tips on how remove duplicate entries?

it best practice delay millis avoid serial buffer overloading, dont know if causing problem, give try.

Arduino Forum > Forum 2005-2010 (read only) > Software > Interfacing > Serial Printing Duplicate entries

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