Advantages | Disadvantages |
High throughput | Device discovery is slow in term of power usage and time |
Resilience against interference | Keeping connections open is expensive in term of power usage |
???????? | ?????????? |
// Wire Master Writer
// by Nicholas Zambetti
// Demonstrates use of the Wire library
// Writes data to an I2C/TWI slave device
// Refer to the "Wire Slave Receiver" example for use with this
// Created 29 March 2006
// This example code is in the public domain.
#include
void setup()
{
Wire.begin(); // join i2c bus (address optional for master)
}
byte x = 0;
void loop()
{
Wire.beginTransmission(4); // transmit to device #4
Wire.send("x is "); // sends five bytes
Wire.send(x); // sends one byte
Wire.endTransmission(); // stop transmitting
x++;
delay(500);
}
// Wire Slave Receiver
// by Nicholas Zambetti
// Demonstrates use of the Wire library
// Receives data as an I2C/TWI slave device
// Refer to the "Wire Master Writer" example for use with this
// Created 29 March 2006
// This example code is in the public domain.
#include
void setup()
{
Wire.begin(4); // join i2c bus with address #4
Wire.onReceive(receiveEvent); // register event
Serial.begin(9600); // start serial for output
}
void loop()
{
delay(100);
}
// function that executes whenever data is received from master
// this function is registered as an event, see setup()
void receiveEvent(int howMany)
{
while(1 < Wire.available()) // loop through all but the last
{
char c = Wire.receive(); // receive byte as a character
Serial.print(c); // print the character
}
int x = Wire.receive(); // receive byte as an integer
Serial.println(x); // print the integer
}
#include EEPROM.h
int a = 0;
int value;
void setup()
{
Serial.begin(9600);
for (int i = 0; i < 20; i++){
Serial.println("***");
EEPROM.write(i, i);
}
}
void loop()
{
value = EEPROM.read(a);
Serial.print(a);
Serial.print("\t");
Serial.print(value);
Serial.println("***");
a++;
if (a == 20){
a = 0;
Serial.println("DONE");
delay(5000000);
}
}
