How do I use ESP8266 ESP-01S WiFi Module with ESP-01S Adapter

Projects Programming
1

Hello Everyone,

I recently purchased a ESP8266 ESP-01S WiFi Module with ESP-01S Adapter. I have been having a difficult time finding libraries and information on how to use this. I was hoping to use it to send emails to myself over Wifi but any help would be greatly appreciated. I am using an arduino Mega board and would like to use hardware serial over Serial1 to connect it. The four pins are GND, VCC, RXD, and TXD.

Here is a picture of the module and adapter:

1100×1100 109 KB

Thanks in advance,

-- DH

2

not a good choice. the adapter only converts power and logic level to use the esp8266 with 5 V boards. you can't use it to flash the esp8266. AT firmware should be in the esp8266. connect the module to Serial1 pins of Mega and use the WiFiEsp library.

to upload your sketch, you can use the esp8266 without the adapter or modify the adapter if you are good with soldering. ask for details.

if you plan to buy some other esp8266, buy a dev board with USB. Wemos D1 mini or NodeMcu.

3

Thanks for the reply,

to upload your sketch, you can use the esp8266 without the adapter or modify the adapter if you are good with soldering. ask for details.

So is there any way to use the converter, what is it good for? It has half the pins of the original module. If not, where would i plug all the pins into?

How would soldering fix the issue? I have some experince in this area and am willing to try.

Thanks again,

-- DH

4

DH12043:
So is there any way to use the converter, what is it good for? It has half the pins of the original module. If not, where would i plug all the pins into?

the adapter converts power and logic level to use the 3.3 V esp8266 with 5 V boards.

DH12043:
How would soldering fix the issue? I have some experince in this area and am willing to try.

It just for fun. Simpler is to buy a dev board. You could remove the 2x3 female header of the adapter and solder the esp-01 2x3 male header there. You would have a 5 V esp8266 module. Then you could add a buttons for reset and to io 0. It would enable to set this board into flashing mode (by holding io 0 LOW at reset).

5

What is Flashing mode, is it neccessary?

How would I use it, do you have any example code for using the esp-01?

Thanks,

-- DH

6

You can do hard way: take piece of wire and while attaching esp-01 adapter to usb of your laptop or whatever Ground pio0 that's all is needed. Or as Juraj suggested use normal converter and solder headers to attach wires. Sometimes when i dont have enough time im doing it with wire. Another option with 2 wires attach usb first then one wite short reset to gnd while holding it short io0 to gnd and release reset wire.

7

DH12043:
What is Flashing mode, is it neccessary?

How would I use it, do you have any example code for using the esp-01?

Thanks,

-- DH

flashing or bootloader mode is to upload a new program into esp8266. new firmware or a sketch from Arduino IDE with esp8266 arduino core package

8

cant it all be done through the main arduino board?

9

DH12043:
cant it all be done through the main arduino board?

If you want to use the AT firmware already installed in the esp-01, then only connect the esp-01 over the adapter to Serial1 pins of Mega and use the WiFiEsp library. you find it in Library manager in IDE