@madscientist initially for the test runs I will install two temperature sensors one in the top and one in the bottom to monitor the temperature. I have considered venting holes in the wooden backplate (bottom and top) or above the monitor in the aluminum frame and the same on the bottom but I would like to avoid that as I don’t know how much light would enter the casing.

Just in case anyone is interested in what the project looks being almost fully assembled.

Features:

• Stereo Amplifier, 2 Speakers
• Google Voice hat and two Microphones, Google Assistant (MMM-Assistant)
• A2DP Bluetooth Enabled
• Capacitive Touch Button playing local news as a Podcast (MMM-Podcast)
• Landscape Mode for performance
• Meanwell 5V Power Supply
• Meanwell 12V Power Supply
• 28" GC2870VH Monitor
• Nielsen Aluminum Frame (45mm height with 20mm surface to attach two sided tape)
• 3m two sided Tape which is specially made for glueing mirros
• Standard wooden Backplate from hardware store screwed to aluminum frame
• PIR Sensor

The Mirror will be delivered first week of September. And is larger than the aluminium frame to give a clean view.

To Come:

• Casing for PIR Sensor and Cap Touch
• Maybe lighting from the inside

If anyone is interested, no matter what Board you use the performance is dramatically reduced as soon as you rotate the screen. This is a measurement of PI3:

• I executed glxgears without vsync.
• measurements are average of fps

So without rotation the performance on the pi3 is a lot better. On the Tinkerboard it is even worse as it only supports Open GL ES and I have not found a solution to get that running with Electron.

one more thing, I noticed when using the newsfeed module it stutters when fading to the next headline, can anyone confirm that? Performance is 10000x better with TinkerBoard than with PI3

have you guys also experienced problems with OpenGL? I used the standard MagicMirror install script and did not compile it from scratch:

everything works just fine, but ht pm2_error.log shows this and I assume performance could be increased by solving that

libGL error: MESA-LOADER: failed to retrieve device information
libGL error: unable to load driver: rockchip_dri.so
libGL error: driver pointer missing
libGL error: failed to load driver: rockchip

@Sean I’ve just tried the google voice hat with your module, it works fine and a lot smoothe for some reason. I disabled the BCM soundcard and no stuttering except of the first google assistent replies right after boot up. Still on RPI3, let’s see with tinker board.

@Sean

Tinker Board looks promising… will take me a while to set up and I am working the next couple of days, let’s see :).

I switched back to headphone jack output and it is the same. Video and sound stutters.

@Sean

what is your CPU usage when playing youtube videos and using the google assistent? I am using OpenGL for rendering… but videos and audio via HDMiIseems to stutter