Moderator: Mmiscool
What size psu are you using for NODEMCU to power and are you powering via 5v pin or usb port etc.
Curious as to if this is a power issue?
For sanity if you power the LCD separately make sure you hook up the gnd from power brick to board to keep things common however do not do the same with power just ensure that the gnd is common not sure
As always be sure to use and check correct voltages for devices based on hardware datasheets or manuals.
Add power brick to LCD hook + to VCC hook - to GND and GND on nodemcu.
Also have had the best luck powering nodemcu with 5v 2A power brick so far has solved all my previous issues caused by power during operations.
If it is not a power issue someone will need to investigate further there is another thread where users are doing this very thing. Keep posting ideas thoughts eventually a solution should arise from discussion but do not get frustrated and give up turn that frustration into motivation dig deeper learn more.
forlotto
Where I buy my ESP8266 boards from... (Banggood)
This may be what caused the confusion.