Digital output getting active at powering up ESP

[PeteKnight]

Lots of examples if you search.
This probably isn’t the best example, but it’s one of the first I came across…

Virtual or GPIO pin control for relay?

esp-01 has only 2 pins out (2 and 0). Normally we use pin 2 for application,e g like your case of triggering the relay. Hence I revised a bit from your code that you can try here with some notes: on Blynk app the virtual pin is supposed V2 the code is for relay with HIGH trigger so if your one is LOW trigger then adjust as comments. If the LOW trigger then the Blynk app with the preset 1 for OFF and 0 for ON #define BLYNK_PRINT Serial #include <ESP8266WiFi.h> #include <BlynkSimpleEsp8266.h> …

In your example you are using pin D7, which is GPIO13
This example uses GPIO2, which is pin D4

Change the sketch or your wiring to suit.

Pete.