Reads incoming serial data. The read() inherits from the Stream utility class.
port.read()
none
the first byte of incoming serial data available, or -1 if no data is available (int)
#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();
port.begin("115200N81N");
}
void loop() {
int txfree = port.availableForWrite();
// gets the size of received data
int rxlen = port.available();
if(rxlen > 0) {
// reads the next byte of incoming serial data
int value = port.read();
Serial.print("read : ");
Serial.println(value);
}
delay(1);
}