<?php
$success = i2c_open(1);
printf("{$success}\n");
$result = i2c_read_byte(56);
printf("result: {$result}\n");
$result = i2c_write_byte(56, 0);
printf("{$result}\n");
/**
* Write a value to the PCF8574.
*
* **WARNING!** This function does not XOR the given value.
*
* @param int $byte The value to write.
* @return boolean|string True if the write was successful,
* else an error string.
*/
public function direct_write($byte)
{
$this->open_bus_if_not_open();
return i2c_write_byte($this->addr, $byte);
}