Google to the rescue!!! (well, and me for doing all the typing for you 
)
As from my examples topic - C++ Blynk (Legacy) - Code Examples for Basic Tasks
For the Wemos… but should be identical for the NodeMCU…
If not, another Google search found this…
I honestly don’t understand how people in this day and age seem unable to survive without their phones… but couldn’t Google an answer if their life depended on it 