How to burn AT commands into the ESP8266?

Other Hardware 3rd Party Boards
1

Does anyone know the steps?

2

Please explain exactly what you want to do

Are you trying to use the esp8266 to send AT commands and if so what are you sending them to and how is it connected to the esp 8266

3

The ESP8266 hardware itself cannot recognize AT commands; it needs to be burned first. I want to know how to burn it.

4

I want to use Arduino UNO to send AT commands to ESP8266,like “AT+RST”.

5

So you want the ESP to accept and recognise AT commands. Is that correct ?

Where are the commands coming from and how is it connected ?

Which AT commands do you want to use ?
Please give examples of how you would use the ESP if it could recognise AT commands

6

Yeah.I want the ESP to accept and recognise AT commands,but I want to know how the ESP to accept and recognise AT commands.

7

Are the AT commands being sent in a serial interface ?

9

Yes.Like this:

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10

What is the unidentified board on the right ?

Let's suppose that the ESP receives "ATDT1234" what should it do ?

11

First of all, please protect the ESP8266 Rx line with a 3x 1K Voltage divider to reduce the logic levels from 5v to 3.3v
Uno Tx -> 1K -> ESP Rx -> 1K -> 1K -> GND The GPIO pins of the ESP are not 5v Tolerant !

Then there are several things that can be wrong, and to solve this there are some steps to take.

First step is to make sure that either there is or there isn't AT-commands firmware already on the ESP-01.
Normally speaking an ESP-01 does come with AT-commands firmware on there, but it could have been overwritten.
To do this you can just use the UNO as a USB to TTL converter

Upload an empty sketch onto the UNO, or 'blink' or basically anything that does not use pins 0 or 1 or Serial
Connect the ESP like this :

UNO                           ESP
3.3v                          3.3v
GND                           GND
3.3v                          CH_PD
GND         <- Button <-      RST
Tx                            Tx
Rx           -> 1K ->         Rx    -> 1K -> 1K -> GND

A simple tact switch can be used to Reset the ESP
Select the port of the UNO and open the Serial monitor in the IDE and set the BAUD rate to 74880.
Now press the Reset button momentarily and after release a boot message from the ESP should show.

Confirm that you have correctly completed this step and i will tell you what to do next.