Arduino uno with esp-01 to blynk

[PeteKnight]

You are trying to use the UNO’s single hardware serial port for two different things (communicating with the ESP-01 via AT commands and for serial debugging) at the same time.
You can’t do this, because the two types of messages confuse things.

You may also be communicating with the ESP-01 at the wrong baud rate, and you may not even have AT firmware running on your ESP-01, it’s impossible to tell from the information you’ve provided.

You should read this for more info on this hardware combination…

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…

But the best advice is really to dump the Uno and ESP-01 and use an IoT capable device with sufficient pins, such as a NodeMCU or ESP32.

Pete.