Questions tagged [web-server]

A web-server is a system which delivers data such as web-pages to a client system.

65 questions with no upvoted or accepted answers
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Sending data from Arduino UNO as a SOAP request

I have a servo motor on one end which can be turned ON and OFF with web service sending SOAP request. In the other end I have my Arduino UNO with ESP8266. Currently, I am able to send HIGH or LOW ...
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4k views

Arduino Ethernet shield server and client at the same time

Hardware: Arduino Mega 2560 Rev3 Ethernet Shield Rev3 A sensor Goal: Take value from sensor, upload it to ThingSpeak. Host a web page on the Arduino. Question: I've done both things in the past. ...
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38 views

ESP32 HTTP Server request interrupts Telnet session

I have an ESP32 application that uses a web server as a user interface. For auditing and debugging during development I use Serial; however, that is impractical in the installed system. So, I decided ...
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670 views

HTTPS POST method fails in esp32

I was trying to connect with server but, I was unable to post the data. I have added the SSL key to connect with server that is happening but HTTPS POST is not. I tried the same method with http, I am ...
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2k views

Sending data from webserver to Arduino

Hello Arduino enthusiasts! I've been working on a keypad lock system for school lately and I need some advice.Basically, my code checks if the entered passcode is the same than a predefined passcode ...
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8k views

ESP32 in Arduino-IDE with FS.h and SPIFFS

I'm working on a webserver on ESP32 in Arduino IDE and would like to load an html-file. Tried to use SPIFFS.open from the library FS.h from github. Errormessage says SPIFFS was not declared in this ...
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231 views

Arduino UNO WiFi RestServer returning “not found”

I'm trying to run RestServer on my Arduino UNO WiFi, and I'm currently using the tutorial from Arduino: http://www.arduino.org/learning/tutorials/boards-tutorials/restserver-and-restclient Everything ...
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1answer
46 views

3 input (on/off/off with delay) to control 1device using ESP8266 as Web Server

I want to control one device in three ways : turn on / turn off / turn off with delay. To do that i use an ESP8266 web server + android phone app. The problem is that turn off with delay wont work. It ...
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105 views

ESP8266 keeps restarting after a few hours of use and dead after 1 month of use

I have tried to make a water heater relay controlled by an ESP8266 (NodeMCU v1.0). The ESP8266 is connected to a central WiFi in my house, the ESP8266 also has its own WiFi so I use STA and AP mode ...
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1k views

Using ESP32-CAM (with ov2640 camera image sensor) to send image via USB

I was trying to obtain image from ESP32-CAM (with ov2640 camera image sensor). I obtained the image through camera web server by connecting the ESP32-CAM and PC to same wifi network. A USB to TTL ...
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161 views

ESP8266 webserver does not return latest HTTP response

I tried getting a HTTP response from an ESP8266 which is in HTTP server mode, I am getting a response but not the latest one, response is always one command previous to that of my request to the ESP. ...
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1k views

Arduino HTTP post image to external server

I'm trying to send an image from SPIFFS to my external server. When pictures are taken, they are saved into "/pics/" directory within SPIFFS. Ultimately, I'd like to post all the images saved onto "/...
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374 views

Cant get rid of Soft WDT reset using ESP8266

Im using ESP12E DevKit v2 (esp8266 wifi module) board for controlling relays and displaying DHT22 temp,humidity on web server. It runs smoothly but after while i always get a watchdog timer reset. (If ...
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123 views

Sensors are not function with ESP8266 WeMos-D1R2

I attached all sensor into the Wemos-D1 for uploading the sensor data to the server. but when I upload the data to the server, it connects to the server but cannot save the data into the database and ...
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3k views

Arduino ESP8266 Webserver SD

I connect Micro SD card adapter to my esp8266. I uploaded the SD webserver example sketch into the esp8266, everything works perfectly once I created index.htm, now I add LED to digital pin 4, now, ...
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575 views

Exporting an html for esp8266

EDIT: Added "web page source" ("In the end", :D ) (Please, sorry if this question isn't in the right place, feel free to move it to that place) Here I have a problem: In my house I have a self-...
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52 views

checking if user is opening root entry point of the IP address on esp8266 webserver

I am trying to open load a webpage from ESP8266 that displays temperature and humidity of my room if I only type root URL:192.168.1.89 GET / HTTP/1.1 Host: 192.168.1.89 Connection: keep-alive Upgrade-...
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1answer
2k views

Load website from SD card

I combined two different codes together, a captive portal and a SD card web server. I encountered a problem which the website in the SD card doesn't load when I connect to the AP (captive portal page)....
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870 views

Exception 29 ESP12E Arduino

I am getting exception 29 every time I make request to HTTP using GET function. I am requesting HTTP every 20-30ms but using millis I am only reading request at 100ms in order to avoid any overflow or ...
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548 views

Make a GET Request GPRS

I'm building a weather station that sends the data to a webserver via GET request. I was wondering if you guys can look into my code and help me. I looked all over the internet and can't find what'...
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68 views

How to make the Yun allow access to a resource

I have replaced /www folder on the Yun (backing it up first), how do I make it so the Yun will redirect to the new index.html? It, right now, gives Access to this resource is forbidden when I go to ...
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224 views

Yun - FileSystem.Open prevents client.println from outputting to web page

The below code is meant to display lines stored in a text file to an arduino based web page (it's a IR gate monitoring solution). When I visit I can execute client.println("hello") and I see the ...
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519 views

How to use console.log message from nodejs server, to control led pin 13?

I want to use Arduino Yun as a client, that connects to my nodejs server, receives a message from nodejs and then change led pin 13 on/off according to the message send. I have this example of a ...
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532 views

Arduino GSM Shield web server hangs

I use official Arduino GSM Shield with Uno R3. I uploaded web server examples from official GSM library. I use a simple python script to make TCP/IP connections to my GSM Shield web server. I send ...
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700 views

Can you interface GSM, WiFi, and Bluetooth LE shield to Arduino?

I have a project that requires the following three shields and I was wondering if the Arduino has enough space to interface all of them at the same time. I am thinking of connecting each shield into a ...
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45 views

Using Javascript XHR to upload a file to the ESP8266 fails

In the past, I was experimenting with a method of uploading files to the ESP8266 using the stock ESP8266WebServer class as the backend. The frontend is embedded in the firmware, and it runs offline, ...
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97 views

TCP client readStringUntil only when data exists

I have the attached script that reads data from a socket server (it is PHP at the server end). My problem (I think) is that the readStringUntil() needs a test above it, so that it "reads up to \r&...
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1answer
115 views

How to Set RTC in ES32 using NTP server?

I am working on ESP32 And want to set RTC from the NTP server. How can I get epoch value I have done this thing on CC3200 launchpad and used an NTP server library to obtain epoch value.
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1answer
41 views

Latency in Websocket

I am using Websocket, for a communication from my mobile phone to a NodeMCU, and transmitting 4 channel, data, through 4 different Websocket Ports. the NodeMCU control code is here: // ============ By ...
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39 views

how to set up an ESP8266 as a webserver

I would like to set up an esp8266, connected arduino as a webserver, specifically, one that has its own IP, and is stand alone, not connected to other networks, and offers its sensor info as the ...
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122 views

File Upload and sending Form data to the ESP using HTTP POST

i want to upload a file from my pc to the esp2966 webserver with sd card. all works fine. But i want to transmit some extra data from a input form field. The Upload works good. in the browser ...
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1answer
93 views

Sending Variable to IFTTT via ESP32 using Asynchronous Web Server

I have been trying to send three variables to IFTTT from my ESP32 using Asynchronous Web Server. However, I couldn't set the "URL" that was supposed to be the response that will trigger my IFTTT. Here'...
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42 views

Parsing Data from local websever

i´m trying to build a little monitor of an ESP8266 and an OLED display that displayes the Status of a Robotarm. The robotarm is controled by a RAMPSboard that has a webserver, so i can check the ...
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75 views

Uploading file via AJAX fails on ESP8266

I have an interesting issue. I have created a copy of the web-server OTA updater library that is designed to print the progress of the update. I cannot of course show the progress while it's rebooting ...
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1answer
110 views

How to display CAN BUS information on EPS32 web server?

I try to display the transmitted information from CAN bus on ESP32 web server. I saved the CAN.read() in a buffer receivedChars[i] and try to display the data by client.println(receivedChars[i]);}. ...
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256 views

Controled in the led by Arduino UNO to Firebase through ESP8266-01+ MIT App Inventor

exchange community , help me community :( I want to control led by MIT App Inventor with used Arduino UNO to Firebase through ESP8266-01 Notes : 1-The led connected pin 11 on Arduino-Uno 2-The ...
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64 views

How to get the body of an HTTP request?

I want to read a binary body datas from an HTTP POST request. The context is that I'm making a LED strip controller and I'm currently using this code : #include <WebServer.h> #include <...
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62 views

Send data to lcd and server via esp8266

The code below, as it stands, works correctly. It connects to a local server (so Token and everything else is no problem sharing) and transmits the data via post. However, when I uncomment the lines ...
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210 views

Arduino uno wifi rev2 get status code from server data

I'm having trouble figuring out how I can extract data from my server call. I am trying to check whether the code that was entered in a boxlock matches the code stored in our database. If the code ...
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215 views

Arduino uno wifi rev2 get json data from api

I'm not so familiar with Arduino UNO wifi rev2. I bought it for a project that I am working on. In general, I have a box that you can open with a code. The Arduino should make a call to the API and ...
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28 views

Getting maxretry error when trying to ping using python requests or urllib3

I have written this code working on SimpleHost example from ESP8266Ping library, the code works, #include <ESP8266WiFi.h> #include <ESP8266Ping.h> #include <ESP8266WebServer.h> #...
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51 views

8266 get uint8_t PROGMEM array from uploaded file

I'm new programming arduino. I have connected an Adafruit thermal printer to an ESP8266 board. I've the example code for use the board like a webserver that allow upload files. What i want is to ...
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30 views

Extend Pyduino over wireless network

I followed a guide to control my arduino uno using a python web server API (flask), and it works like a charm using the COM port on my PC. I would like to extend this over the network with an ESP8266 ...
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1answer
30 views

command keeps echoing because web page tries refreshing

I want to execute a action only once when I press web page button but as the page tries refreshing the action gets executed in a loop. I am using the wifimanualwebserver example for esp8266. Please ...
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57 views

How to implement server.on() without any libraries?

I was trying to setup a web server with Arduino and ESP32, without using the ESP32 libraries. Currently I'm able to display a webpage(a form with single submit button) from the server, with only using ...
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82 views

Delayed response from web server

I am trying to implement a web server in ESP8266 that will handle simple HTTP GET requests by initiating an operation (e.g. move a stepper motor to the requested position) and return a response when ...
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31 views

Nodemcu POST Response “-1”

Nodemcu device is returning HTTP response -1 for a POST request on django rest api. I tried the below http request to Postman, and it works perfectly fine. http://localhost:8000/api/datalogs/?plant=...
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2k views

Send Arduino data to PHP inorder to upload in MySQL database

I'm trying to send arduino data to my online web server using a Arduino Uno and a Ethernet shield. I used POST method for sending data and tried sending data to my sever (add.php) using a online POST ...
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246 views

Creating global webserver without port forwarding

I'm setting up a "Smart House" project with Arduino+Esp01F(Serial Communication). But I want to make it global server. For it I use WiFiEsp library. But for it I must Get any port (neither 80 nor 443),...
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57 views

Why sometimes parsed data is null in WiFiEsp?

I'm setting up web server with args. As host.com/?pin=9. I parsed the response by indexOf and substring functions. In first connection response has been successfully parsed and number has been parsed ...