Hello, Pert!
Thank You very much the fast reply. Meantime I uploaded this sketch to my MEGA 2560, and this program is working:
avrdude: Version 6.3-20171130
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "C:\Users\fgabor\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino14/etc/avrdude.conf"
Using Port : COM4
Using Programmer : wiring
Overriding Baud Rate : 115200
AVR Part : ATmega2560
Chip Erase delay : 9000 us
PAGEL : PD7
BS2 : PA0
RESET disposition : dedicated
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
eeprom 65 10 8 0 no 4096 8 0 9000 9000 0x00 0x00
flash 65 10 256 0 yes 262144 256 1024 4500 4500 0x00 0x00
lfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
efuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
lock 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
Programmer Type : Wiring
Description : Wiring
Programmer Model: AVRISP
Hardware Version: 15
Firmware Version Master : 2.10
Vtarget : 0.0 V
SCK period : 0.1 us
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.01s
avrdude: Device signature = 0x1e9801 (probably m2560)
avrdude: reading input file "C:\Users\fgabor\AppData\Local\Temp\arduino_build_978547/BMP180_teszt.ino.hex"
avrdude: writing flash (8814 bytes):
Writing | ################################################## | 100% 1.36s
avrdude: 8814 bytes of flash written
avrdude: verifying flash memory against C:\Users\fgabor\AppData\Local\Temp\arduino_build_978547/BMP180_teszt.ino.hex:
avrdude: load data flash data from input file C:\Users\fgabor\AppData\Local\Temp\arduino_build_978547/BMP180_teszt.ino.hex:
avrdude: input file C:\Users\fgabor\AppData\Local\Temp\arduino_build_978547/BMP180_teszt.ino.hex contains 8814 bytes
avrdude: reading on-chip flash data:
Reading | ################################################## | 100% 1.06s
avrdude: verifying ...
avrdude: 8814 bytes of flash verified
avrdude done. Thank you.