Questions tagged [web-server]

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

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21 views

Http Client requests

I am working on a project where the ESP 8266 sends a very long string about 3000 chas over http as client. Likewise sensor data are determined. The loop repeats itself every 250ms. Now I noticed that ...
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Ethernet Shield not connecting

I've mounted an Ethernet Shield on top of an Arduino UNO. The Arduino is connected via usb to my pc and to the network via ethernet through a switch. I'm running a simplified verison of the WebServer ...
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1answer
5k 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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60 views

Controlling Offline ESP8266 from secure website

I want to control my ESP8266 device from my secure website via 2 different ways: if ESP8266 is connected to internet, commands between website and device will sent over MQTT which as working ...
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36 views

How to avoid MQTT reconnect Loop

I have the following code designed to allow me to control my device from my website using mqtt broker while internet is available. I also built in a local webserver to control the device in case of ...
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1answer
55 views

Error initializer-string for array of chars is too long using ESP32 Webserver

i tried to use an asynchronic webserver for a new project with friends using this tutorial. We want to run an FFT while also changing some settings via the webserver. Since the tutorial only put code ...
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0answers
25 views

Where to define web server callback functions so they can access server object? (ESP8266WebServer library)

I want my ESP8266-based device to create an accesspoint that allows the user to input their home ssid and password. There is a device object that holds most of the data defined elsewhere. I'm trying ...
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1answer
28 views

How do I get an HTTP_POST response?

I have a function for HTTP_POST responses but it is never called when I post to it. I get the webpage instead. I call on it with server.on("/",HTTP_POST,response); But I only get the url in ...
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1answer
46 views

How to access GPS location without internet

I need to provide a basic geolocation service for my clients. I built a location service based on the phone geolocation. It works great, not a problem. My problem is that some of my clients don't have ...
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1answer
40 views

HTTP_GET not clarified in scope

I'm trying to do an async webserver with access point using an ESP32. It's a little bit of a mix between This tutorial for AP and async and this tutorial since it's also with an async webserver and it ...
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37 views

Peculiar relay behavior from POST

I am trying to toggle on/off between two separate HTTP request. One submit button to turn it on, and another separate submit button to turn it off. I expect the device to launch in the off/low 0V ...
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0answers
26 views

Help with ESP32-CAM “AI THINKER” module

I'm trying to make a RC car (with a surveillance camera if possible, using the web-cam code that comes with the ESP library) using a ESP-32 CAM as a wifi module to control the car using my computer. ...
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1answer
144 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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1answer
3k 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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0answers
36 views

How do you concatinate an interger with a string in server.send data?

I have a class I am trying to add its global counting variable value to int switch0; class void webpage() { server.send( 200, "text/html", "<html> \ <...
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35 views

incompatible types in assignment of 'const String' to 'char [32] using server.arg

I am trying to create a class and getting getting the error incompatible types in assignment of 'const String' to 'char [32] when I declare char inString[32]; and try to set it as inString = server....
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1answer
856 views

Wemos D1 mini freezing after a few minutes

I´m using a Wemos D1 mini board to control a RGB LED Strip and programmed a simple code with the Arduino IDE. The Wemos conects to my Internet just fine and with the IP adress I can change the RGB ...
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1answer
57 views

ESP8266 SocketIOclient constant disconnect with Python WebServerSocket

I am writing a program that echos back the message sent to the web socket server on a host machine. When running the ESP module, the connection is established but immediately disconnects as seen in ...
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1answer
34 views

How do I make two (or more) pins available on my server url?

I have a webserver configured on my esp8266 with is set to fire off electrical relay0 on my 8 port relay board. The device initializes relay0 perfectly and without errors. But when I configure the ...
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0answers
112 views

How to get text type form data from a website hosted by esp8266 webserver in arduino

I am learning to use esp8266 as a web server. I have done a simple example of controlling the on board LED from a HTML page hosted by esp8266. As a further improvement I wanted to add a password ...
0
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1answer
484 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.
2
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1answer
56 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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1answer
633 views

Replying with a html page in HTTP Web Server using esp01 and ArduinoIDE

Now there are many ways to reply with a webpage content to a user who is accessing the web server, But Keeping in mind to use as less space as possible, I was trying something new, Since i didnt got ...
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1answer
247 views

GSM library_ all examples ar working except GPRS?

i am using arduino uno and sim808. i connected the sim808 to pins 2,3 on arduino uno and used GSM library. i tested all examples: make and receive a call or messages. the part of GPRS initialization ...
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1answer
35 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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1answer
197 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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1answer
41 views

Connecting Web Server in GoDaddy Hosting

I have a domain. It is hosted by GoDaddy. I need to connect that server and receive some data by executing PHP files. I am not sure about the components. Tutorials on internet describes how to control ...
2
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1answer
50 views

Run method Every Hour Passes

I have a method. I need to trigger it every hour passes.(Cron Job) I mean; 10.00 p.m -> Trigger 11.00 p.m -> Trigger 12.00 p.m ->Trigger ... ... Card: Arduino Uno + Wifi Shield. Draft Code ...
4
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4answers
868 views

How to assign text stored in a local file to a string at compile time

I'm developing a program that uses the HTML server in the WiFi101 library. My hardware does not have SD card storage so all source html needs to be stored as strings in the sketch at compile time. ...
0
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1answer
49 views

Is there a way to send a String via a Webserver Textbox without the use of the SD card?

Since my last post, I've been trying to do some extra things with my Stranger Things Wall Project. I connected a LCD Screen (16x2) that will take any text being processed to the wall and show what is ...
1
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1answer
50 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 ...
2
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2answers
486 views

ESP12E Soft WDT reset stack trace leads to libraries

Im using ESP12E DevKit v2 (esp8266 wifi module) board for controlling relays and displaying DHT22 temp,humidity on web server. It runs smoothly when the web client is closed but when i leave the ...
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1answer
654 views

Control DC Motor with Arduino Uno WiFi Rev2 Html Slider Code

I would like to control my dc motor using the Arduino Uno WiFi Rev2 using an html range slider. Now I can control the motors speed and direction using push buttons just fine. My code is posted below ...
2
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1answer
6k views

WebSocketsServer.h: No such file or directory

I'm trying use the NodeMCU WebSocket. I downloaded the required libraries from: https://github.com/Links2004/arduinoWebSockets and pasted them in my Arduino libraries folder. I uploaded my code but ...
3
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0answers
105 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 ...
2
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1answer
123 views

Creating WebServer ip:port on esp8266 module

I creating Clever House with wifi. For this I'm using ESP8266 as module connected to Arduino. They communicate with SoftwareSerial. And there's a problem with global webserver on ESP8266. That I think ...
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1answer
632 views

Why we are using client.flush() in the program code ,when we connect Esp8266 with internet or web server?

I am using Esp8266 Wifi modular (12-E) for controlling a led through the access of wifi/webserver. I have written code in Arduino ide taking various references from the google.In the code, I didn't ...
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0answers
69 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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1answer
62 views

Most Efficient & Cost Effective Home Automation Setup

I managed to build a system using Wemos D1 R1 connected to my website to retrieve data to power on or off a 5V relay. Now I would like to expand the project to control all my house outlet. Assuming I ...
1
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1answer
580 views

Updating Server using ESp8266 with Direction Button Pressed IN

I've connected a 5-way tactile switch to a ESP8266 module and am using the Arduino IDE to create an automatically updating web server that displays the direction that the button is pressed in when ...
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0answers
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 ...
2
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1answer
72 views

Run function concurrent to server.available()

I have a Arduino UNO WiFi Rev2 board that runs WiFiServer serving as a web server. The server listens and accepts clients using server.available(). I also want a loop that controls a servo in ...
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2answers
147 views

Stability issue with webserver and smartmeter logging

In the past few months I have successfully logged the data from the power and gas meter in my house to a remote web server. Now I try to add the ability to enable and disable my doorbell over the ...
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2answers
476 views

Controling 5V relay with Wemos D1 R1

I would like to control a 5V relay with Wemos D1 R1 module through webserver. I'm using the following modules: Tongling 5vdc Relay Wemos D1 R1 I'm using the following schematic: and here is the ...
0
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0answers
298 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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0answers
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 ...
0
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1answer
35 views

ESP32 Cannot assign value to string. Getting wrong value

Hello I have problems with strings in my sketch. I assingn values to my string (for example tempStrReturn) in the functions setNr1, setNr2. If i pass the value 1 to the function i get "" or "...
5
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2answers
18k views

How to receive data from my server database to a variable in my Arduino?

I am learning to work with the client - server communication. I am able to communicate with my server and able to store values in the table. But I want to receive one of the specific data from the ...
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0answers
274 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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0answers
25 views

Why does server.streamFile download does not work with SD.h? [duplicate]

This is only a little test code so i can focus on the problem. At first a file is written on sd card with the timestamp given in the variables. This works fine. At SD_file_download() i open a File ...

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