One of the big WordPress problem – long response time (over 1000 milliseconds). Optimal response time should be no more 500 ms. One of the effective way for it – enable cache on web server level.
VoCore2 – is a very interesting board for IoT solutions that based on SoC MT7628AN.
By default in official Arduino documentation no any information about WatchDog timer. WatchDog timer (WDT in short) – is a hardware external timer that reset the microcontroller if the main program crashed or go to the infinite loop or etc error action.