Probem of add some sensors



I want to add anlalog temperature sensor into my OpenROV V2.8.
In my case, image version is v30.0.3 ROV FLASH image

I read some instructions about that. (
That instruct “Take the sketch that has the sensor working and cut and paste it in to the renamed light.h and light.cpp files.”.

But, in my cloud9, there is no light.h and light.cpp file.
What is wrong?
And, could you please let me know how to add my sensor in v30.0.3 ROV FLASH image?