def write_byte(self, i2c_addr, value, force=None):
        """
        Write a single byte to a device.

        :param i2c_addr: i2c address
        :type i2c_addr: int
        :param value: value to write
        :type value: int
        :param force:
        :type force: Boolean
        """
        self._set_address(i2c_addr, force=force)
        msg = i2c_smbus_ioctl_data.create(
            read_write=I2C_SMBUS_WRITE, command=value, size=I2C_SMBUS_BYTE
        )
        ioctl(self.fd, I2C_SMBUS, msg)