The gimbal “TYPE” option at the top of the page is greyed out! Also other gimbal options like “Input CH” etc are also greyed out.
I am unable to understand why is this happening?
Your mission planner version is 1.3.79
Your ArduCopter version is 4.2.1
Do not confuse them.
The solution is to update to ArduCopter 4.3.2-rc1 and use the “full parameter three” to activate and configure the gimbal.
…
MNTx_TYPE
It’s greyed out in Mission Planners Camera Gimbal page because MP has not caught with the fact there are 2 configurable gimbals now. Periodically update MP to latest Beta and someday it will be fixed.
What is the solution right now?
How do I make it active?
You don’t, you configure in the Full Parameters list. Get in the habit and these annoyances won’t slow you down.