Networking and communications

Have you:

Described your design and fabrication process using words/images/screenshots
Explained the programming process/es you used
Outlined problems and how you fixed them
Included original design files and code

Described your design and fabrication process using words/images/screenshots

I decided to use the ESP8266 modules to establish a wireless connection.

Using PCB files we mill two boards, one for the server and one for the client.

Finally, carefully welded components.

Explained the programming process/es you used

Connect a FTDI cable to PCB with the ESP8266 module and send AT messages from a serial terminal.


											AT

											AT+GMR

											AT+CWMODE=1

											AT+CWLAP

											AT+CWJAP="Minecraft","diegoriv"

											AT+CIPMUX=1

											AT+CIPSTART=1,"TCP","fab.cba.mit.edu",80

											AT+CIPSEND=1,50

											GET /test.html HTTP/1.1

											HOST: fab.cba.mit.edu

											AT+CIPCLOSE=1

After checking the operation of our PCB now we can program it using Lua scripts.
Flash both ESPs with NodeMCU
Connect the FTDI cable to PCB and add connection GPIO 0 to GND.

You have to download the NodeMCU flasher. Download it from Here

Then download ESPlorer IDE to program the server and the client.
Download the code for the server.


											-- 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)

Download the code for the client.


											-- 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)

Outlined problems and how you fixed them

I had trouble linking the ESP8266 modules with Arduino so used LuaNodeMCU firmware.

Included original design files and code

Code