Lock screen on a damaged iPhone screen/digtizer - how to enter the pin

So, I droppped my phone shattering the screen and digitizer.  It no longer recognized touch input on the screen and the screen was dead.   The home button still worked.  This was an iPhone 6s.

I had to do some research on how to unlock my iphone after damaging my touch screen.  I was able to do it!  And then backup my iPhone saving all the pictures and content!

Here's how

1. Lightning to HDMI adapter - with this I was able to see my phone's lock screen (and later drawer after it was unlocked) - find it at staples or apple store or online (amazon)

2. Lightning to USB adapter - used to hook up a USB keyboard (in my case a Costco logitech wireless keyboard worked fine (any wireless keyboard should do) - I inserted the Unifying keyboard USB part of the keyboard into the adapter and was able to type my unlock code on the logitech keyboard.  I ordered this part on amazon:

In my case, that's all I had to do - if you haven't previously synced your phone with your PC you may need to turn on voiceover in siri and/or use the keyboard shortcuts (Ctrl + Alt + Spacebar) to select Trust this computer when the prompt appears on the phone screen.   Instructions for that can be found here: https://discussions.apple.com/thread/5839619?tstart=0

in iTunes, backup the phone and choose encrypt backup to make sure all content is backed up!

UPDATE:  You can also turn on voiceover using Siri.  Then open the settings app using siri.  Then hookup your USB keyboard as above and use left and right arrows and follow along using another phone or iPad for the settings menu options.  I was able to navigate to iCloud settings and then using Up + down arrow to select and then move left right to toggle photo library backup on.