The goal of this project is for you to get two ESP8266 boards to communicate with one another.

How does it operate? You are going to configure one ESP to function as an Access Point (Server), and the other ESP is going to be configured to function as a Station (Client). After that, they will set up a wireless communication, and the Client will communicate with the Server by sending a message that says "Hello World!"

The following items make up the hardware that you will need to finish this

ESP8266-01 and FTDI programmer Schematics (3.3V FTDI Programmer) (3.3V FTDI Programmer) The blueprints for this project don't require much interpretation at all. In order to upload some code, all that is required of you is to establish a serial communication link between your FTDI programmer and your ESP8266. (The diagrams for the Client and the Server are presented below in identical fashion.) Downloading ESPlorer It is strongly suggested that you make use of the ESPlorer program that was developed by 4refr0nt in order to generate and store Lua files into your ESP8266. Get ESPlorer by clicking here.

Do not compress that folder. Navigate to the primary file folder. Run ESPlorer.jar. Because it is a JAVA program, you will need to ensure that you have JAVA installed on your computer. Activate the ESPlorer. Writing Your Server Script Don't forget that the first thing you need to do is flash the NodeMCU firmware onto both of your ESPs. Simply copy the code below and then paste it into ESPlorer. -- Rui Santos -- Complete project details at https : //randomnerdtutorials.com -- ESP8266 Server

print ( "ESP8266 Server" ) wifi . setmode ( wifi . STATIONAP ); wifi . ap . config ({ ssid = "test" , pwd = "12345678" }); print ( "Server IP Address:" , wifi . ap . getip ())

sv = net . createServer ( net . TCP ) sv : listen ( 80 , function ( conn ) conn : on ( "receive" , function ( conn , receivedData ) print ( "Received Data: " .. receivedData ) end ) conn : on ( "sent" , function ( conn ) collectgarbage () end ) end ) The ESP Server can also function as an access point, and it has its own unique SSID (which is "test") and password (which is "12345678"). The server maintains a state of continuous listening for a connection, and when it

successfully establishes a connection and receives a message, it prints that string on the serial monitor. Uploading Your Lua Script When you open the ESPlorer, you should see a window that looks very much like the one in the previous figure. If you want to send commands to

Establish a connection between your computer and the FTDI programmer. Bad raunch should be set as 9600. Choose the appropriate port for your FTDI programmer (COM3, for example) Use the Open/Close button. Choose the tab labeled "NodeMCU+MicroPtyhon." Make a copy of your Lua script and paste it into ESPlorer. The next step is to click the button labeled "Save to ESP," and give the newly created file the name "init.lua." Everything in the following figure

that you need to be concerned about or adjust is highlighted in red and can be found in the box in before image. Writing Your Client Script Having NodeMCU installed on your ESP after it has been flashed. Simply copy the code below and then paste it into ESPlorer. The ESP Client functions as a Station, and as such, it is consistently searching for an Access Point to connect to. Once it has located the Server, the Client will initiate communication by sending out "Hello World!" messages at regular intervals of five seconds each. -- Rui Santos -- Complete project details at https : //randomnerdtutorials.com -- ESP8266 Client

print ( "ESP8266 Client" ) wifi . sta . disconnect () wifi . setmode ( wifi . STATION ) wifi . sta . config ( "test" , "12345678" ) -- connecting to server wifi . sta . connect () print ( "Looking for a connection" )

tmr . alarm ( 1 , 2000 , 1 , function () if ( wifi . sta . getip () ~= nil ) then tmr . stop ( 1 ) print ( "Connected!" ) print ( "Client IP Address:" , wifi . sta . getip ()) cl = net . createConnection ( net . TCP , 0 ) cl : connect ( 80 , "192.168.4.1" ) tmr . alarm ( 2 , 5000 , 1 , function () cl : send ( "Hello World!" ) end ) else print ( "Connecting..." ) end end )

Please take note that the ESPlorer Output Window is displayed in the window on the left. In the window on the right, I'm setting up a serial communication connection with PuTTY.org.