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Problem in Blynk app

I am created home automation using NodeMCU and Blynk. But i am facing some problem, if the power of NodeMCU changes then he became in his programing state(means if the NodeMCU port is high then it’s work high if low then it’s work low

If the NodeMCU is going int flash mode on power-up then it’s probably because you have something connected to GPIO0 or GPIO2 that is pulling the pin LOW, or something connected to GPIO15 that is pulling the pin HIGH.

More information here:

Pete.