My WTIU arrived today and I tinkered around with it this evening. The first thing I noticed is that the app prompted me that there is a firmware update available (i missed the screenshot) and gave me options to Upgrade now, Skip, or remind me later. I picked the last of the three options because I wanted to try it right away. So after confirming that everything worked I went to the advance option menu and began the firmware update process.
I checked the firmware version before starting the update in the advanced system menu:
First I had to download the update from the server and then the app gave specific instructions for updating the WTIU. I missed the screenshot here but it did mention that you unplug all cable from the unit, set to MTH Mode and connect to the MTH Wi-Fi network.
I pressed the begin button and the app uploads the firmware file to the WTIU:
The next screen showed firmware being installed on the WTIU. This screen gave very specific instructions and warnings about what not to do and how long this process will take:
The process did take the whole 4 minutes and when it was done, the lights were lit as indicated in the message plus the WPS light was flashing. The app was unable to connect to the WTIU so I did power cycle the WTIU. It went through it's normal boot up process and everything worked normally and the app could connect again.
I went to the Advanced features menu and check the firmware revision:
I'm not sure what this update fixes or it's intended purpose, so far I haven't read anywhere that an update was available. My pretesting update did have one hiccup where the engine went unresponsive to commands after startup and I had to power cycle the WTIU to get it working again. After the update I didn't have that problem again. The other thing I noticed is the responsiveness of the variable slider in the app was greatly improved. It was very smooth and responded much faster after the firmware update.
