String manipulation in ash scripts

[Francesco Furfari]

Hello folks !
I'm new to this forum and to Yi camera too.
Thank you for your work I discovered a lot of interesting things in such forum.

I would like to create a script that according the time is able to change ISO and exposure used by the camera.
I wrote a working bash script but unfortunaly many of the commands I used don't work with the ash interpreter. For instance date command is very limited (date "+%H%M" doesn't work)
So I wanted to use string manipulation to get the current time but neither substrings extraction with expr or ${...} operator seems to work.

Any idea?
What am I missing?

Thanks in advance

 

[Manoj George]

did you make any progress on this? ie getting Yi camera to use different settings at different times?

 

[vadimkozhin]

Francesco, check out this thread. User Armdromeda trying to sync multiple cameras using fire shutter at the beginning of next second on internal clock. It does not doing what you need, but may be it will give you some clues how to work with time in scripts.