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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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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2
votes
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 ...
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0
votes
1
answer
212
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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 ...
1
vote
0
answers
57
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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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1
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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 "...
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1
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How to connect multiple NodeMCUs and 1 PC over wifi and have PC control NodeMCUs? [duplicate]
I am trying to design a laser tag system using multiple NodeMCUs in the guns. I am trying to figure out how to connect and control them over WiFi. I also need a computer connected that will control ...
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2
votes
1
answer
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Securing ESP8266 connections
In my setup, I've got a number of ESP8266 devices around my home controlling various devices like my boiler and some lights.
They're all controlled by a central smart hub on a Raspberry Pi with a ...
- 165
4
votes
1
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What does []() argument in function mean?
I am working in ESP8266 AsyncWebserver library and have been using this [](parameter) as an argument to some functions as shown below but does not really know what it means. Being a neophyte I am ...
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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'...
1
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0
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68
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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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2
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Arduino webserver POST receive varriables
I have been learning lower level data reading on internet communication
As a part of bigger project I am testing web interface.
So far I could get main website displayed and by seeing the web-address ...
- 338
1
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1
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516
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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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vote
1
answer
995
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Serialize JSON as response to HTTP request
I'd like my ESP8266 to provide some JSON endpoints. I want to use ArduinoJson for serialisation. While this works in general if I serialize into a String and return this String afterwards, I was ...
- 123
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0
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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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1
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Can you make Arduino Uno send information through a WiFi module to a server?
A lot of tutorials are about how to control Arduino through WiFi, but I need my Arduino to send information about motion sensor activity to a server. Is that possible?
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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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1
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168
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Refreshing a web-page hangs after few times
I'm using a Nucleo F429ZI board and I wrote a sketch that enables a simple web-server:
#include <LwIP.h>
#include <STM32Ethernet.h>
const int WEB_PORT = 80;
EthernetServer server(...
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1
vote
0
answers
96
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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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1
vote
0
answers
125
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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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1
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0
answers
422
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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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2
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1
answer
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ESP8266 Webserver ESP8266WebServer variable html page (not as one const char)
The aim is to display a non-static html page depending on some variable condition.
The code I created hast the problem, that the esp8266 is ressetting in the moment I request the page.
const char ...
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1
vote
1
answer
966
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ESP8266 Webserver ESP8266WebServer move Handler-Function in separate .h .c file
The plan is to create a bigger project and to split the ESP8266 webserver-code over several modules (.h .c files). The main problem is that the ESP8266WebServer server is not declared in the index.h ...
- 551
1
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0
answers
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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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1
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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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1
answer
390
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Esp8266 + Atmega328p as flash
Being clear I'm not talking about How to flash ESP8266 using arduino.
I want to ask how can I use atmega328p as flash with esp8266 (instead of that 8 pin small chip on ESP-01) so that I can burn ...
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1
answer
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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 ...
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1
answer
381
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how to convert date to timestamp? [duplicate]
How should I convert date format(dd-mm-yyyy) to timestamp value . Can anyone suggest code how to convert and where to put code .
-1
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1
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How do I send Sensor Data from one Arduino to another Arduino that is a Webserver to post it?
I have been looking for over 2 hours now and just cant get it figured out. Im very confused as to how to do this. The solution I thought I found was to use HTTP POST. But I just cant get it to work. ...
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0
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168
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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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2
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0
answers
395
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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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1
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96
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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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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 ...
1
vote
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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Multiple WiFi client/server connections
I'm implementing a WiFi HTML web server using the WiFiNINA library, an Adafruit Airlift ESP32 coprocessor, and a Teensy 3.5. It's starting to work, but I have a couple of questions. This simplified ...
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0
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449
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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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0
answers
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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 ...
1
vote
1
answer
1k
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Error Compiling sketch for Arduino Uno(ld return 1)
I have got an telnet server with esp8266 + SoftwareSerial+ UNO, and here I want to on led with command ON .
will be 1 or 2. It is for recive 1 or 2 numbered pins.
And I extract pin from request with ...
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0
answers
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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 ...
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0
answers
169
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Creating WebServer with 5000 port with AT command(ESP-01f)
I'm setting webserver with toggle led. I want to create global webserver. I`m mean hat use server with global ip. For it I must use port too. global ip/local ip:port.
I want to create on 5000 port. I'...
0
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1
answer
183
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How do I properly use the WiFi capabilities of ESP8266?
I am creating a project with an ESP8266 (Arduino IDE) which requires it to serve a webpage to a client. The module will be connected to a WiFi network by default, but when that WiFi network is not ...
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ESP32 OTAWebUpdater only works on mobile
I'm experiencing something strange. I opened the default ESP32 example "OTAWebUpdater" in the ArduinoIDE and modified just the network part (I created a soft AP instead). The problem is, when I ...
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0
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WiFiServer Stops After Reconnection to WiFi
In the following code, the Arduino is reconnecting to the WiFi after several loops. The idea is to check and re-establish WiFi connection every 30 minutes or so.
However, the WiFiServer seems to ...
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Create one server in AP mode and another in station mode
I'm trying to connect one ESP8266 to WiFi as a WebServer in station mode and to another ESP8266 as a server (that has no web pages) in AP mode.
The problem is both servers are being created in AP ...
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0
answers
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Connect Arduino and ESP8266 NodeMCU
I want to connect multiple sensors and see their measurements via ESP8266 Web Server. But, the problem is that ESP8266 has only one analog pin and I can't connect multiple sensors to it, so i need to ...
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why arduino can not write to server?
i write a code for Arduino + SIM800 for connecting to server.
but it don't work!
SerialGsm.println("AT+CIPSEND=63\r\n");
delay( 1000 );
receive_message();
SerialGsm.print( "GET http://sasasas.ir.ir/...
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1
answer
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Sim800L Uploading issues, HTTPACTION returns 0, 302, 701
I'm using the Sim800L module and the NEO6M GPS Module in combination with an Arduino nano to create a simple tracking device. I get the data from the GPS and try to upload it to my site with some ...
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2
answers
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ESP8266 Webserver not reachable after 2 minutes from reset
I have a Keyes Espressif ESP8266 NodeMCU, I have two LEDs that I want to control which are connected to the ESP. When I open the webpage http://10.0.0.5/5 after uploading the sketch it works fine. If ...
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Change css form color from esp32 if statement
I am fairly new to arduino and ESP though am very familiar with css and javascript.
I have an esp webserver that includes a button
client.print("<button style='background-color: #F30C0C; color:#...
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1
answer
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Webpage values wont update
I've been trying to run the following esp32 LED PWM code to change the LED's brightness, and show the current PWM duty on the webpage, but the PWM values on the webpage won't change until I hit the ...
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1
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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 ...
