Arduino Nano - ESP8266 "Weird" AT Command Responses

[gokturkcinel]

Hi.

I am trying to communicate with the ESP8266 module I plugged in to my Arduino Nano. The connections are done as shown in Fig. 1.

Fig. 1. ESP8266 connections. Image taken from https://www.electronicwings.com/

Only difference is that I have not connected the EN, RST pins. Anyways, whenever I send an AT command, I get a "weird" response. My command input, let's say "AT", is displayed as "AAT" and I get "k" as a response instead of "Ok". For different commands such as "AT+GMR" I cannot make sense of whatever is returning. I tried to provide you with an image in Fig. 2-3.

Fig. 2. Response for AT command.

Fig. 3. Response for AT+GMR command.

Can you help me fix this? Thank you for reading this.

Note: I don't know if you will be able to see the images. Fig. 1. is taken from https://www.electronicwings.com/storage/PlatformSection/TopicContent/308/description/ESP8266%20WiFi%20interfacing%20with%20Arduino.png . Fig. 2-3 just show you weird AT responses, but a response nonetheless.

TL;DR: ESP8266 returns weird messages for AT commands. Using Arduino Nano. Need help

[Juraj]

and what are you doing in loop() there?

[gokturkcinel]

No clue. Got it from the internet. Is that the problem? Do I need any piece of code for AT communication?

Edit: Getting no sorts of reply after deleting the code inside loop()

[sterretje]

Please post your code (and not a screenshot of it).

Using SoftwareSetial on hardware serial pins is silly (to put it politely), Using it in combination with HardwareSerial (as you do) is asking for problems; on Uno/Nano/Mega/Pro Mini, pins 0 and 1 are used for the USB connection with the PC.

Move your ESP8266 to other pins on the Nano and adjust your SoftwareSerial to use those pins.

Note: The ESP8266 is a 3.3V device; you're strongly advised to use a voltage divider from the Arduino''s TX to the ESP8266's RX.