In this blog, we will see How to "Turn On and Turn Off" an LED that has connected to the Esp8266, the esp8266 has programmed from Arduino IDE to control the LED.
We will connect the Esp8266 to the Wi-Fi router using SSID and password of our Home network Wifi , where the esp8266 connect to our wifi and create a webserver, which can be accessed by looking through the serial Monitor of the Arduino window or you can also log into your Wifi router and check for the list of clients connected to your Wi-Fi router.
Here's a window which explains the step by step procedure to connect the Esp8266 to the Wi-fi server and How to access the Webpage and control the LED connected to the Esp8266
We will connect the Esp8266 to the Wi-Fi router using SSID and password of our Home network Wifi , where the esp8266 connect to our wifi and create a webserver, which can be accessed by looking through the serial Monitor of the Arduino window or you can also log into your Wifi router and check for the list of clients connected to your Wi-Fi router.
Here's a window which explains the step by step procedure to connect the Esp8266 to the Wi-fi server and How to access the Webpage and control the LED connected to the Esp8266
For the above video I have used NodeMcu, you can use any type of Esp8266 to make this thing work in your web browser.
look for the mapping of pins in with your Esp8266 vendor, if the program not working properly for you , the fault will be with the pin mapping functionalities, Here I used the D7 pin which mapped to 13th pin when program from the Arduino IDE.
Connect your Esp8266 to Arduino IDE and Select the correct COM Port and board type and
upload the program.
Note change the SSID to your WiFi Name and password to your Wifi password. if you forget to change it , esp8266 will not connect connect your wifi.
--------------------------------------------------------------------------------------------------------------------------
#include <ESP8266WiFi.h> const char* ssid = "Magesh"; const char* password = "jayakumar"; int ledPin = 13; // GPIO13 WiFiServer server(80); void setup() { Serial.begin(115200); delay(10); pinMode(ledPin, OUTPUT); digitalWrite(ledPin, LOW); // Connect to WiFi network Serial.println(); Serial.println(); Serial.print("Connecting to "); Serial.println(ssid); WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(""); Serial.println("WiFi connected"); // Start the server server.begin(); Serial.println("Server started"); // Print the IP address Serial.print("Use this URL to connect: "); Serial.print("http://"); Serial.print(WiFi.localIP()); Serial.println("/"); } void loop() { // Check if a client has connected WiFiClient client = server.available(); if (!client) { return; } // Wait until the client sends some data Serial.println("new client"); while(!client.available()){ delay(1); } // Read the first line of the request String request = client.readStringUntil('\r'); Serial.println(request); client.flush(); // Match the request int value = LOW; if (request.indexOf("/LED=ON") != -1) { digitalWrite(ledPin, HIGH); value = HIGH; } if (request.indexOf("/LED=OFF") != -1) { digitalWrite(ledPin, LOW); value = LOW; } // Set ledPin according to the request //digitalWrite(ledPin, value); // Return the response client.println("HTTP/1.1 200 OK"); client.println("Content-Type: text/html"); client.println(""); // do not forget this one client.println("<!DOCTYPE HTML>"); client.println("<html>"); client.print("Led pin is now: "); if(value == HIGH) { client.print("On"); } else { client.print("Off"); } client.println("<br><br>"); client.println("<a href=\"/LED=ON\"\"><button>Turn On </button></a>"); client.println("<a href=\"/LED=OFF\"\"><button>Turn Off </button></a><br />"); client.println("</html>"); delay(1); Serial.println("Client disonnected"); Serial.println(""); }
-------------------------------------------------------------------------------------------
If everything completed you can turn to your serial monitor and check for the ip address that your devices has connected to . you will presented with an serial monitor that look exactly to the picture below.
if you like the above tutorial and if you want try out with cool projects you can also check this link here , that's the amazon book link where you can use that book to make IoT with Esp8266 or Nodemcu, that books gives you basic coverage on how to do simple things and get yourself started with arduino and goes on developing projects like sending data to webserver and creating a webserver, uploading and controlling data from a webpage, how to interface TFT LCD and I2C devices and many more things can find on the link.
http://www.amazon.in/ESP8266-Serial-Wireless-Transceiver-Module/dp/B00O34AGSU/ref=sr_1_1?ie=UTF8&qid=1452944269&sr=8-1&keywords=esp+8266
ReplyDeleteCan I control the LED using my module - A blog would be appreciated.
Control An Led From Webserver Using Nodemcu Or Esp8266 Programming With Arduino Ide. >>>>> Download Now
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Hi,
ReplyDeletethank you for this tutorial. I bought your kindle book and did the 'blink; example.
Then I tried 'Control an LED from Webserver using NodeMcu' but after loading the the code and opening the serial monitor it only writes points (....................................) not the URL number. Can you help me?
Hi have you configured your SSID and password for your browser correctly? if you get only (.........) as your output it means that your ESP8266 is not connected to your browser. mail me at jayakumarmagesh@gmail.com
DeleteGood day my friend,
Deletemy name is Carlos Zapien, I was looking your totorial of Control an LED from Webserver using NodeMcu or Esp8266 programming with Arduino IDE, everything is ok but, i have problems with the conections and a can't conect the arduino uno and the ESP8266 to turn it on the led, can you help me please?, it just the conection between both devices, your code is running now, thank you so much my friend!!!
Saludos!!!
This works great! Thanks for taking the time to write this tutorial.
ReplyDeleteHello,
ReplyDeleteThanks for this tutorial.
I am new to NodeMCU ESP8266 12E.
I have done a few blinking and accesspoint examples and all works fine with Arduino IDE 1.6.7 and my Win 7 PC.
I tried your tutorial code and on my Arduino IDE serial port, I am getting an 'Exception (3)' error:
Connecting to Magesh
Exception (3):
epc1=0x401003e9 epc2=0x00000000 epc3=0x00000000 excvaddr=0x4002a839 depc=0x00000000
ctx: cont
sp: 3ffef8b0 end: 3ffefc90 offset: 01a0
>>>stack>>>
3ffefa50
When I modified, changed the ssid and password, I am getting the same error that 'Nadav Ziv' was getting;
always telling me 'connecting to ' and never stops!
Your help is much appreciated...
You should never use an LED without resistor or you will destroy it.
ReplyDeleteThanks for sharing the code and great work.
ReplyDeleteCan you please help combine this with the ESP8266WebServer.h - HttpBasicAuth in the example? I really like to add a login at the beginning of accessing server.
Did you get the abv Roy
DeleteI am looking for the exact same thing
Very nice article!
ReplyDeletegot successfully control my led.
Thanks dude doing a great job...thanks a lot
ReplyDeleteThanks dude doing a great job...thanks a lot
ReplyDeletecan u send book name please i am not able to see the book in amezon .. plz mail me the name of book on amazon rangrezumarfarukh@gmail.com
ReplyDeletemy is showing --Error compiling board node MCU 0.9(ESP-12 Mode)
ReplyDeleteBoard nodemcu(platform esp 8266,package esp 8266) is unknown
error compiling for board nodeMCU 0.9(ESP-12 Module).
plies help me
I have the same problema.
DeleteWhat can I do?
Thank you
The same problema with V0.9 and V1.0
Deletethanks this is working
ReplyDeletedont work
ReplyDelete#include
ReplyDeleteconst char* ssid = "Kontrol_Bol";
const char* password = "11qq22ww";
ok works. :) how can i add more 3 leds.
ReplyDeleteand on smartphone is menu buttons too small whic line can i menu larger.
otima espricacao.
ReplyDeleteesta dando erro neste serto oque pode ser pque estou aprendendo ainda
obrigado
/ Inicie o servidor
servidor. Começar ();
Thanks a lot for this tutorial :D
ReplyDeleteHey first thanks for the great tutorial works great and its still simple!!!!
ReplyDeleteBut I have this problem that the server is only accesible in the first 20-40 minutes after that i have to reset the esp/wemos because the server is down!
Can please anyone tell me how to fix this?
Thanks
Worked on the way,........Thank you for all code....I have modified it as per my requirements
ReplyDeletecan u give mr ur code
DeleteThe LEDs can be controlled from anywhere with the help of the given URL or it has to be connected to the same wifi on which the esp is connected?I mean if we have the URL then can I control the led anywhere around the globe?
ReplyDeleteno it(device) had to be connected with the same connection(wifi) as the the ESP's.
DeleteBrilliant thank you just what I have been looking for.
ReplyDeleteCould you tell me how to monitor a switch connected to the ESP8266 from a webpage?
I have tried to copy and paste the code from the webpage , when I put it into an Arduino sketch I get an error
ReplyDeleteI copied it from the box and it works ok
DeleteWow gracias amigo me ayudaste un monton recien empece con el esp
ReplyDeletehi nice project...thanks for sharing.
ReplyDeletehow to control more than 1 gpio.
and is there any direct link to turn leds off and on?
:)
i want to connect given ip address by wifi.localip() to another webpage which is not connected to nodemcu wifi network
ReplyDelete9
Good day my friend,
ReplyDeletemy name is Carlos Zapien, I was looking your totorial of Control an LED from Webserver using NodeMcu or Esp8266 programming with Arduino IDE, everything is ok but, i have problems with the conections and a can't conect the arduino uno and the ESP8266 to turn it on the led, can you help me please?, it just the conection between both devices, your code is running now, thank you so much my friend!!!
Regards!!!
Hi Carlos,
DeleteThere is no Arduino Uno involved. It all runs on the NodeMCU itself, including connecting the LED.
why it stops responding after sometime???
ReplyDeleteYou have to replace:
Deletewhile(!client.available()){
delay(1);
}
with:
int t = millis();
while(!client.available()){
delay(1);
if (millis()-t>130) return;
}
because sometime the module locked into the while loop so we have to return if it locked for more than 130 milliseconds! I read it from: https://openhomeautomation.net/control-a-lamp-remotely-using-the-esp8266-wifi-chip/
This is super and worked first time for me, it worked even when I entered the IP address on my iPhone! Now... next step... if I wanted to use (style) and a .class to change the appearance of the button, is there any way to do that?
ReplyDeleteafter copying the url onto a browser it is showing this site can not be reached please help what is the problem
ReplyDeleteMaggie, try the SSID#, example 192.168.1.1 (I think the default the AP mode uses, is 192.168.4.1).. But, since this is using the local router, it will be a different number.
DeleteI stand corrected, the IP#, not the SSID.. (forgive me, Networking newbie)
DeleteThe Article give Where Everyone And Everything Will Be Monitored On The Internet is awesome.It Give brief information about How the Internet of Things Gone work.Thanks for Sharing the information about it.
ReplyDeleteseo expert in nepal
hi.
ReplyDeletealways still waiting ...........
and it never give me any adresse to open it :(
can anyone help me please ?
same project, you can see another instruction here
ReplyDeletehttp://engineer2you.blogspot.com/2017/06/esp8266-esp12e-web-server-with-arduino.html
Can any one please give me code fo multiple channel output @shubhamrajput00722@gmail.com
ReplyDeleteVery simple but useful project. I test it in my NodeMCU 1.0 (ESP-12E) module and worked perfectly . Programmed using Arduino IDE 1.8.3.
ReplyDeleteThanks for a great starter project. It worked first time... until I scanned my home network with the "Fing" app on my phone. It locked up.
ReplyDeleteYou need to add
count = 0;
while(!client.available()){
delay(1);
count++;
if ( count > 1000 )
{
Serial.println("Abandoned Client");
return;
}
}
to stop network scans from locking it up.
It's so cool. I tried and liked the implementation.
ReplyDeleteIs it possible to connect to multiple client and control the LED?
ReplyDeletedoes it works on ny other wifi mobile network if they turn on the led????
ReplyDeleteHelp! I get this error:
ReplyDeleteaggregate 'ip_addr_t addr' has incomplete type and cannot be defined
ip_addr_t addr;
I do not know what the problem is please help!
Hi, I uploaded your code on my NodeMCU V2 Amica.
ReplyDeleteI don´t get an error message, but the serial Monitor prints out only questionmarks.
I only changed the ledPin to LED_BUILTIN because I don´t have a LED right now.
I also noticed, that I don´t have the "Upload using Serial" button at my tools menue.
Please help.
ok, I changed the Baud adjustment. Now it is all dots. I know it means it can´t connect to the router. But I´m sure I used the right name and Passwort.
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how to do when looking at web server with 1 button turn off and turn 4 led?
ReplyDeleteThis is gigantic thus exact here. Much obliged to you for posting them.
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ReplyDeletein order to open web server i used ip xxx.xxx.xxx.xxx:80/
And it worked for me
can input from NODE be obtained ?
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ReplyDeletei just copy and paste this code on arduino ide the serial monitor gives the ip address ijust copy and paste on url.It cannot connect web server it shows this site cannot be reached.please help me.
ReplyDeletehi can we add colour to B&W buttons any help will be appreciated
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ReplyDeleteHi, I have followed the above process.
ReplyDeleteWiFi connection has been established, but the LED does not switch ON and OFF according to the instructions.
The blue LED on the nodeMCU performs the exact opposite operation of the command that I execute from the URL, whereas the LED that I've connected to the NODEMCU does not work at all.
Please help.
Thankyou.
thanks for providing good content, which is very useful for us. Keep posting!!
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hello, how can i use the same button for tuning "on" and "off" the same led ?
ReplyDeletePrograms like that are used way more often than it is often expected. They are part of the development in new technologies. They all influence our lives in various ways already and said influence is only going to grow even bigger. A great example of such development is ax dynamics - ax-dynamics.com who work on using artificial intelligence to boost productivity of factories or other businesses.
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ReplyDeletesir,its showing-error: espcomm_upload_mem failed-pls do the needful sir,
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ReplyDeletei had connected one led to esp8266nodemcu for ON/OFF the LED remotely.
urfortunately the following error occured
when the serial monitor shows IP address ,i just copied and paste it into the browser
at that time browser shows" cant reach the site .
please help me how to correct it and also i want to read my led status from remote browser
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"C:\\Users\\KIIT\\AppData\\Local\\Arduino15\\packages\\esp8266\\tools\\xtensa-lx106-elf-gcc\\2.5.0-3-20ed2b9/bin/xtensa-lx106-elf-size" -A "C:\\Users\\KIIT\\AppData\\Local\\Temp\\arduino_build_881074/sketch_nov06b.ino.elf"
ReplyDeleteSketch uses 274696 bytes (26%) of program storage space. Maximum is 1044464 bytes.
Global variables use 27024 bytes (32%) of dynamic memory, leaving 54896 bytes for local variables. Maximum is 81920 bytes.
esptool.py v2.6
2.6
esptool.py v2.6
Serial port COM7
Connecting........_____....._____....._____....._____....._____....._____.....____Traceback (most recent call last):
File "C:\Users\KIIT\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.5.2/tools/upload.py", line 25, in
esptool.main(fakeargs)
File "C:/Users/KIIT/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.5.2/tools/esptool\esptool.py", line 2653, in main
esp.connect(args.before)
File "C:/Users/KIIT/AppData/Local/Arduino15/packages/esp8266/hardware/esp8266/2.5.2/tools/esptool\esptool.py", line 468, in connect
raise FatalError('Failed to connect to %s: %s' % (self.CHIP_NAME, last_error))
esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header
esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header
how to solvw this error ??
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ATENCIÓN: la librerÃa IoTtweetESP32 pretende ejecutarse sobre arquitectura(s) esp32 y puede ser incompatible con tu actual tarjeta la cual corre sobre arquitectura(s) esp8266.
D:\Arduino\ESP8266_New\ESP8266_New.ino: In function 'void setup()':
ESP8266_New:29:28: error: invalid conversion from 'const char*' to 'char*' [-fpermissive]
WiFi.begin(ssid, password);
^
In file included from D:\Arduino\ESP8266_New\ESP8266_New.ino:1:0:
C:\Program Files (x86)\Arduino\libraries\WiFi\src/WiFi.h:79:9: error: initializing argument 1 of 'int WiFiClass::begin(char*, const char*)' [-fpermissive]
int begin(char* ssid, const char *passphrase);
^
Se encontraron varias bibliotecas para "WiFi.h"
Usado: C:\Program Files (x86)\Arduino\libraries\WiFi
No usado: D:\Arduino\libraries\WiFiNINA
Se encontraron varias bibliotecas para "ArduinoJson.h"
Usado: D:\Arduino\libraries\Antares_ESP8266_HTTP
No usado: D:\Arduino\libraries\Antares_ESP8266_MQTT
Se encontraron varias bibliotecas para "ESP8266WiFi.h"
Usado: D:\Arduino\libraries\ESP8266WiFi
No usado: C:\Users\user\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\libraries\ESP8266WiFi
Se encontraron varias bibliotecas para "SPI.h"
Usado: D:\Arduino\libraries\SPI
No usado: C:\Users\user\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\libraries\SPI
Se encontraron varias bibliotecas para "ESP8266HTTPClient.h"
Usado: D:\Arduino\libraries\ESP8266HTTPClient
No usado: C:\Users\user\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.7.4\libraries\ESP8266HTTPClient
exit status 1
invalid conversion from 'const char*' to 'char*' [-fpermissive]
La carpeta o el archivo zip no contienen una librerÃa válida
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