Hi NaotoYAMADA
The factory calibration is available directly through the device using device.readFactoryCalibration().eepromToJson()
. This calibration data doesn't get overridden when flashing your own calibration so it should still be the one done at the factory.
If you have no access to the device, I can send you mine, since I have one PRO W at hand. Of course, depends on the version you are using.
Thanks,
Jaka