Khun Taro,
Please open https://m.facebook.com.groups/ASIAIR/ in Safari on the iOS device.
Look for an announcement of Beta testing from ZWO Astronomy Cameras, and there is a link that starts with "testflight.apple.com" Click on that link.
You do not need a FaceBook account. For security reasons, I myself do not have a FaceBook account and will never have a FaceBook account.
You may also need to first install the TestFlight app from the iOS app store, if you have not used TestFlight before.
Please note that when you install and run the beta v1.2 ASIAIR app, it will download new firmware to the ASIAIR hardware (takes 1 to 2 minutes -- be sure power is not cut off to the ASIAIR hardware). One you update to new firmware, older versions of the ASIAIR app in iOS device will hang when you try to run it with the new firmware in the ASIAIR hardware.
Before you run the beta app, be sure to first make a backup copy of the older version of the SD card to your Mac -- you can use the MacOS program "ApplePi-Baker" to back up the old SD card, and also to create a new SD card if needed. Be sure to use Sumsung 32 GB SD cards only.
If you do not feel comfortable with beta testing, just wait a week or two, and I am sure ZWO will release a stable version of v1.2.
Sawasdee krub, Taro san.
- chen