Answers for "arduino serial read and write string"

arduino serial read write structure

void send (const structTable* table)
{
    Serial.write((const char*)table, sizeof(structTable));  // 2 bytes.
}

bool receive(structTable* table)
{
    return (Serial.readBytes((char*)table, sizeof(structTable)) == sizeof(structTable));
}

arduino serial write

/*
Writes binary data to the serial port. This data is sent as a byte or series of bytes; to send the characters representing the digits of a number use the print() function instead.

Syntax
Serial.write(val)
Serial.write(str)
Serial.write(buf, len)

Parameters
Serial: serial port object.
val: a value to send as a single byte.
str: a string to send as a series of bytes.
buf: an array to send as a series of bytes.
len: the number of bytes to be sent from the array.
*/