How can i control quadcopter with blynk and nodemcu esp8266?

blynk-cloud.com” is the old blynk server. The new blynk server is"blynk.cloud".
Also, there’s no need to specify a server, just add the

#define BLYNK_TEMPLATE_ID           "TMPLxxxxxx"
#define BLYNK_DEVICE_NAME           "Device"
#define BLYNK_AUTH_TOKEN            "YourAuthToken"

At the top of your sketch and use

Blynk.begin(auth, ssid, pass);

Instead.

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