ESP-01, arduino MEGA2560, blynk... ESP is not responding

[PeteKnight]

I’d start by reading this…

Understanding hardware and software serial ports

I’m still seeing frequent posts, mostly from new members of the forum, who are confused about how to add WiFi or Bluetooth connectivity to devices like the Arduino Uno, Nano or Mega, or from people who are trying to use serial communication with some other type of peripheral. I thought I’d try to put together some guidance on how to do this properly. First things first though – if you’re using a device such as an Uno, Nano or Mega that doesn’t have built-in internet connectivity then you shoul…

I don’t really understand the part where you said that you’ve flashed new AT firmware to your ESP-01 using the Arduino IDE. As far as I’m aware, that’s not possible.

I also don’t understand this part…

@NejdeTo

I tried to upload sketch with programming pin to GND or without, or with reset pin

It sounds like you are trying to upload the sketch to the ESP-01, rather than the Mega.

Pete.