I need help, i connect arduino mega with ESP-01s and blynk 2.0 . It returns like above

[PeteKnight]

In your previous attempts at posting about this issue you said that you were using a NodeMCU with the Mega. You now say that it’s an ESP-01.

If you are using a ESP-01 with your Mega then reading this might help to point you in the right direction…

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…

Pete.