Use of SerialEvent()

hi,
 
i'd use serialevent() capture incoming software serial data cannot seem it.

the first of 2 following codes works it's not using serialevent() option.

but second code fails , it's using serialevent() option.

what doing wrong? and, practice using serialevent()? perhaps, don't need it.

tia

code: [select]


/* incoming data:
    t0123456789
    s012345678901234567
    ip192.168.0.12
*/

#include <softwareserial.h>

softwareserial esp_serial(10, 11); // rx, tx

string epoch;

void readepoch(void);

void setup() {
  // open serial communications , wait port open:
  serial.begin(9600);
  esp_serial.begin(9600);
  delay(10);
}

void loop()
{
  readepoch();

  serial.println(epoch);  //works!! prints 0123456789
  delay(1000);
}

void readepoch() {
  string readstring;

  while (esp_serial.available()) {
    delay(10);  //small delay allow input buffer fill

    char c = esp_serial.read();  //gets 1 byte serial buffer
    readstring += c;
    if (c == '\n') {
      break; //breaks out of capture loop print readstring
    }
  }

  readstring.trim(); // trim white space off string if any

  // if first char = t read unix time
  if (readstring.length() > 9 && readstring.startswith("t")) {
    epoch = readstring.substring(1, 11);
  }
  if (readstring.length() > 12 && readstring.startswith("s")) {
    // more code here
  }

  readstring = "";
}


code: [select]


/* incoming data:
    t0123456789
    s012345678901234567
    ip192.168.0.12
*/

#include <softwareserial.h>

softwareserial esp_serial(10, 11); // rx, tx

string inputstring = "";         // string hold incoming data
boolean stringcomplete = false;  // whether string complete

void setup() {
  // initialize serial:
  serial.begin(9600);
  esp_serial.begin(9600);
  // reserve 40 bytes inputstring:
  inputstring.reserve(40);
  delay(10);
}

void loop() {
  // print string when newline arrives:
  if (stringcomplete) {
    serial.println(inputstring);
    // clear string:
    inputstring = "";
    stringcomplete = false;
  }
}

/*
  serialevent occurs whenever new data comes in the
  hardware serial rx.  routine run between each
  time loop() runs, using delay inside loop can delay
  response.  multiple bytes of data may available.
*/
void serialevent() {
  while (esp_serial.available()) {
    // new byte:
    char inchar = (char)esp_serial.read();
    // add inputstring:
    inputstring += inchar;
    serial.println(inputstring);  //totally empty!!
    // if incoming character newline, set flag
    // main loop can it:
    if (inchar == '\n') {
      stringcomplete = true;
    }
  }
}


serialevent() doesn't work software serial.

it not necessary use serialevent(). can have "good code" use , equally "good" code doesn't use it.

for larger programs, seems write own, because can control runs inside large loop. standard serialevent() can run @ end of loop().

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