Problem with module ILI9341

When you output a long word, it fails. And when you perform on a short command, there is no failure.

@user79559, could you please elaborate on that a bit more? (cannot see anywhere in your code something that displays "Hi...*).

The restart may have different causes:

• running out of heap space
  
• running out of time (js work has to complete in the breaks between ESP8266 has to tend Wifi business)
  
• running out of power (brown out... if ESP8266 is not solidly powered / has not enough decoupling capacitance across GND and VCC, or power supply is too weak - too many other things are on the 3.3V rail together with ESP8266 - ESP8266 Wifi operation takes it down...)