Hello, somebody has work with a DHT library and Smartmatrix.
I have an issue, they can’t work together.
First when the DHT make a read of the temperature or humidity the panel make a flicker.
And all the time (At some point in the loop, less than a minute), it gets stuck when the swapBuffers is called.
Somebody has suffer something like that? 
Best regards
Álvaro Monares G.
Hi Álvaro,
Sorry for the long delay. It looks like this library disables interrupts, possibly for a long time, which breaks the sketch because SmartMatrix requires interrupts to be enabled most of the time.
Unfortunately I don’t have a workaround. A fix likely requires a rewrite of the DHT library so it can be used without disabling interrupts for long. You might try posting to the PJRC forum to see if they know of a way to read this sensor without disabling interrupts for long. (Please post a link back here too so I can follow along) PJRC (Teensy) Forum