[arm-allstar] Fail over upon loss of internet

[chris novara]

I’ve been asked to change our club repeater that has a noisy RF link to Allstar as internet is available at our far end tower site. 

But, a fail over auto option upon loss of internet is desired. 

Can I set up the Pi to send a DTMF command if the internet is lost for more then 30 mins? 

Then the reverse - when internet is restored for 30 mins, the Pi sends dtmf to tell the controller to switch back to the Allstar feed.

Since we are using the *73xxxx I know there is some issues with auto retry confusing the LED that Doug helped me
With. Generally it works great though. 

Can this be done reliable? 

Thank you,

Chris Novara, AB7BS
Eugene Oregon
Cell: 541-778-1175