begin()

Description

This function sets the parameters for serial data communication.

Syntax

port.begin(baud)
port.begin(sets)

Parameters

baud - a integer value which represents the data rate in bit per second
sets - a string value which represents the data rate, parity, data bit, stop bit and flow control

string format of the sets - (): required, []: optional

"(baudrate)[parity[data bit[stop bit[flow control]]]]"

Returns

none

Example

#include <PhpocExpansion.h>
#include <Phpoc.h>
#define BUFFER_SIZE 100  // read and write buffer size, reduce it if memory of Arduino is not enough

byte spcId = 1;

ExpansionSerial port(spcId);

byte rwbuf[BUFFER_SIZE];  // read and write buffer

void setup() {
    Serial.begin(9600);
    while(!Serial)
        ;

    Phpoc.begin(PF_LOG_SPI | PF_LOG_NET);
    Expansion.begin();

    // sets the parameters for serial data communication
    port.begin("115200N81N");
}

void loop() {
    int txfree = port.availableForWrite();
    int rxlen = port.available(); 

    if(rxlen > 0) {
        if(rxlen <= txfree) {
            int rwlen; // read and write length

            if(rxlen <= BUFFER_SIZE) 
                rwlen = rxlen;
            else
                rwlen = BUFFER_SIZE;

            // receive data
            rwlen = port.readBytes(rwbuf, rwlen);

            // send data
            port.write(rwbuf, rwlen);

            // print data to serial monitor of Arduino IDE
            Serial.write(rwbuf, rwlen);
        }
    }

    delay(1);
}

< ExpansionSerial()

available() >