Questions tagged [web-server]
A web-server is a system which delivers data such as web-pages to a client system.
248
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Using ESP32CAM board but no face is enrolled
I was working on a project to use the ESP32CAM board to detect faces and open some sort of lock. The program can detect the face using the yellow box that shows up as you can see from the following ...
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1
answer
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How can I host a WiFi network from an Arduino getting a connection from a SIM card?
My friend and I are doing a project and we're stuck on a problem. We tried looking stuff up but it looks like no one documented something similar before.
Basically, what we want to do is have one ...
CommunityBot
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0
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ESP32 Static IP issue in AP mode | softAP
I want to create a webServer with esp32 as AP. Now the issue is that the ESP32 provides a
ESSID not the IP address.
Here's my code
#include <ESPAsyncWebServer.h>
#include <SPIFFSEditor.h>
...
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votes
1
answer
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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 ...
CommunityBot
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2
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1
answer
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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'...
CommunityBot
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3
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Why is the server.on() function from "ESPAsyncWebServer.h" executed in the setup() side and not on the loop() side?
I'm implementing an example in which 2 ESP32's communicate each other using the HTTP Protocol. One acts as Server the other as Client. In the examples provided, I am curious about the declaration on ...
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1
answer
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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.
CommunityBot
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1
answer
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Problem with reading MIFARE 13.5Mhz with MFRC522 lib
I'm trying to read the UID of MIFARE 13.5Mhz cards with MFRC522 lib and I have defined the following function for it.
void getUID() {
if (mfrc522.PICC_IsNewCardPresent() && mfrc522....
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1
answer
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Arduino uno R4 vs ESP32 Dev board
I was wondering what product would work best for my application. I need a web server interface to control several digital outputs connected to my board, and it needs to be as polished as it can be.
In ...
CommunityBot
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1
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A peristaltic pump with pH sensor and web based output project
Good day to you all, I am asking here to confirm that my project is feasible. I have low knowledge of Arduino and other components. Please help me in achieving this project.
I already have the ...
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1
answer
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ERROR: return reinterpret_cast<T>(pgm_read_ptr(p));
I need to update DHT sensor data to the webserver in JSON format using ESP8266. This is my code.
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#...
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3
votes
0
answers
958
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ESP8266 Webserver does not respond
I am trying to reach the webserver running in my Wemos D1 Mini compatible board.
I am trying one esp8266 example using Arduino examples "WifiManualServer" code below.
I have replaced the SSI ...
3
votes
1
answer
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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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3
answers
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How to allow cross-domain requests on ESP8266WebServer
I am using a Raspberry Pi running Chrome (handling the user interface) and connecting via ajax to an Arduino D1 compatible using the IP address as follows:
$.ajax({
type: "GET",
...
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vote
0
answers
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Why is this buffer not being sent to the server?
I'm loading a buffer with different data recorded by sensors and sending them to a server. But I also wanted to log when the data was sent on the client side, so I formatted the time of my RTC clock ...
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3
answers
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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 ...
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0
answers
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ESP32 can't connect to websocket web application hosted in Glitch server
I am trying to build a system to send sensor data from esp32 to a node.js based application with Websocket, hosted on Glitch server.
When locally hosted (under the same router), esp32 can send data to ...
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1
answer
998
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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 ...
CommunityBot
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1
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1
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Why when I try to connect my ESP8266 to my node sever in my localhost it keep getting disconnect and connect?
I think the issue is within the library because I have try to implement this code according to the tutorial that I found in YouTube Youtube. The discussion of this tutorial is the first they implement ...
CommunityBot
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3
answers
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Multiple client server over wifi
Trying to setup a server on Arduino to support multiple clients,
I am able to support one but I don't want to flush that client to make another connection.
#include <ESP8266WiFi.h>
const char* ...
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1
answer
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Any way to pass EthernetClient to function outside of loop automatically?
I have an Arduino webserver that displays many buttons over a webpage (73 at the moment) that toggle different switches. I shortened up the button-drawing code with this function:
void displayButton(...
CommunityBot
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1
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862
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EspAsyncWebServer process HTTPS to HTTP
I read this issue. But I didn't understand it.
Like the author I don't have an SSL certificate and I don't want to have one (because if I had one I could live with HTTPS!).
I just want to process any ...
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1
answer
215
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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 ...
CommunityBot
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1
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2
answers
5k
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Arduino IDE + ESP32 Webserver - how to redirect to root after click on button
I'm trying to use ESP32 + Arduino IDE to control a relay.
I've started by using the library and the code below.
The problem I'm having:
after clicking on the button and activating the pin, if the ...
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votes
0
answers
128
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Communication between two ESP32s using WiFi
I have two ESP32s. One is acting as webserver and the other is acting as a client that will send a GET request to the server ESP32. Both of the ESP32s are connected to the same WiFi AP.
For sending ...
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votes
1
answer
727
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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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2
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ESP web server calling Javascript function
Is there a way to call Javascript functions from an ESP?
I don't want to call AJAX requests every few seconds; I want to update my values only when they change.
Can it by done?
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5
answers
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How to make better looking webpages on an Arduino webserver?
I have a Teensy 4.1 with ethernet, but I have other networked MCUs like a D1 mini, various ESP8266s and Arduino ethernet shields.
My question is: how I can make better looking web pages on these ...
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1
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Why does the data I send to the server get rounded off and how do I send the entire float instead?
#include <Arduino.h>
#include <WiFi.h>
#include "WiFiManager.H"
#include <HTTPClient.H>
#include "ESPAsyncWebServer.h"
#include <AsyncTCP.h>
float version =...
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2
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422
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ESP32 AsyncWebServer with softAP does not serve pages
I'm trying to create a AsyncWebServer after enabling the SoftAP:
#include <Arduino.h>
#include <SPIFFS.h>
#include <WiFi.h>
#include <WiFiAP.h>
#include <AsyncTCP.h>
#...
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1
answer
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Generalize webserver routing
I'm following the examples for ESP32:
AsyncWebServer _server(80);
_server.on("/", HTTP_GET, [](AsyncWebServerRequest *request)
{
request->send(SPIFFS, "/index.html", ...
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0
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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&...
2
votes
1
answer
130
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How can I do web hosting having all the code of the site stored in a sd?
I am carrying out this project in which the arduino acts as web server and hosts a website in which I show the constantly updated temperature of a laboratory.
The problem is running all this code in ...
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1
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Use of ESPAsyncWebServer.h with ArduinoJson version 6 for Master-Client transactions
I want to communicate two (2) ESP32's via Json commands using ESPAsyncWeb.h. The master should have specific operations to execute and respond to the client, and the client should be able to send ...
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0
answers
298
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Using both FastLED and Webserver without glitches possible?
I'm using an ESP8266 to control a short strip of WS2812 LEDs. I also want some way of remote Control so I'm looking into using a Web UI with the ESPAsyncWebServer library.
However using that Webserver ...
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0
answers
690
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ESP8266 ESPAsyncWebServer LittleFS crashes
I am trying to write a simple web page to be served from my ESP8266 based on this tutorial: https://www.mischianti.org/2020/10/26/web-server-with-esp8266-and-esp32-byte-array-gzipped-pages-and-spiffs-...
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1
answer
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ESP32 Access Point using ESPAsyncWebServer, how to send multiple parameters between submenu and main (index) menu while still retaining page layout? [duplicate]
I am trying to figure out how to get requests (or whatever they are called) to display in the serial monitor, yet not change the HTML page bodies.
The user selects their choices in the submenu (...
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1
answer
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ESP32 Access Point and HTTP Web Server, how to send multiple parameters?
I made this minimal example in order to figure out how to get requests (or whatever they are called) to display in the serial monitor. However, none of the query parameters (in the URL) can be seen in ...
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1
answer
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Problems connecting to WiFi101 access point
I currently have two Arduino Zero boards (using the SAMD21 microcontroller), each with an ATWINC1500 wifi module attached. I have established one of these units as a wifi access point with a server ...
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1
answer
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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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0
answers
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How to fix this problem of invalid conversion from 'const char*' to 'char' [-fpermissive] [closed]
Im working with node mcu ESP 8266 and trying to make it a webserver but keep encountering this problem.
#include<ESP8266WiFi.h>
WiFiClient client;
WiFiServer server(80);
void ...
3
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0
answers
5k
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Arduino Ethernet shield server and client at the same time [closed]
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. ...
CommunityBot
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1
vote
1
answer
2k
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ESP32 AP Automatic Web Page
I've often encountered WiFi networks that require you to sign in through a web page that automatically opens after connecting to the access point, such as hotels. I'd like to implement something ...
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0
answers
4k
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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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1
answer
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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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1
answer
211
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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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0
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1
answer
658
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How to update a text file dynamically
I have Two Arduinos, One with the help of sensors it will dynamically updates in to my server database. Other Arduino, reads the stored contents from the server database and sends sms to phones.
Now, ...
CommunityBot
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1
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Esp8266 not responding to GET request from Android app created using MIT App Inventor
I hope I am posting this question in the right section.
I am making a Smart Home Project for my college semester finals. I am using an Atmega328p microcontroller along with an ESP8266 (Esp 01). The ...
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0
answers
190
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NodeMCU server stops responding after a while
I'm new to NodeMCU and ESP. I've created a basic web server on my NodeMCU.
The server works fine for the first few minutes after resetting the board or re-uploading code. But after about half an hour, ...
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1
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0
answers
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Sending data to server
I have an SD card have a very big file (1M character). i try to load it into memory in terms of 4K character array ( The maximum I could do using Arduino Mega). but this take almost 250 call to the ...
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