Questions tagged [ethernet]

Ethernet can be used for cabled communication between an Arduino and a computer, server, or website. For question concerning the Arduino Ethernet board, use the tag "arduino-ethernet" instead.

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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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477 views

Modbus TCP/IP using Arduino uno and ENC28J60 module

I have this project where I need a modbus tcp server that will host a series of sensor data for other modbus client devices to read. I use this Library by Andresoarmento This is the code i am using ...
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84 views

Teensy 4.1 Ethernet Throughput

Using a socket server on a Teensy 4.1, I am sending and receiving data in a loop from a Windows socket client (WinForms C#.NET). I am sending or receiving 530 bytes of data. In each direction, it ...
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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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578 views

Slow response from ENC28J60

I am making a circuit which turns a LED on and off through internet. I am connecting an Arduino to a LED and to an Ethernet controller(ENC28J60), but when I make a GET request to the device, it takes ...
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287 views

Ethernet module ENC28C60 doesn't connect to internet when DHCP on router is disabled.

Update: Examples from library are working if DHCP is enabled! Using this library I try to connect with static IP but it always say DNS failed. Ethernet module is blinking that means is good ...
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120 views

Resend data traffic from an Arduino

I have an Arduino with an Ethernet shield and I want to capture all Ethernet data traffic that connects to the Arduino via [as?] a router. This is because I want to use the Arduino like a honeypot and ...
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636 views

Problem related to Arduino ip address

Can anyone explain to me why my output ip is: 15.16.17.18? I configured my addresses as follows: Arduino : gateway 192.168.1.1 ipaddress 192.168.1.8 subnet 255.255.255.0 My local network: gateway ...
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179 views

Uno Ethernet shield and TMP36 reading

I am just getting started with my Uno via the Vilros Ultimate Starter Kit. I've done all of the sample circuits and played around with a few other things. Today I connected the Ethernet shield with ...
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16 views

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
51 views

SD seems too slow for SMTP

I have asked this question on the arduino forum as well. I have used SMTP before using client.print (and client.println) but I am now trying to move as much text as I can from RAM to SD (and so I need ...
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35 views

3 pin ethernet module?

So basically I'm working on a project that uses an Atmega328 like on the Arduino Uno. I need to receive both DMX (with max485) and E131 (Not both at the same time, I'll decide which with a boolean in ...
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98 views

How to connect computer and Arduino with EtherCard?

Can you please give me an example of how to connect my computer to Arduino using EtherCard library? I want to send a string of text using Python's socket module and send this text back to the serial ...
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31 views

Ethernet Shield doesn't work at all

I connected corresponding pins of Arduino Nano and the Ethernet Shield, connected my computer to a router (the light indicated the connection) and Ethernet Shield to the same router. Nevertheless, ...
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58 views

Arduino blocks when serving web pages

I have an Arduino sketch that serves an HTML web page using the standard Ethernet library (https://github.com/arduino-libraries/Ethernet) and the Ethernet Web Server library (https://github.com/khoih-...
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41 views

STM32Ethernet UDP misses some packets

Using STM32Duino on Nucleo F429ZI: #include <LwIP.h> #include <STM32Ethernet.h> #define UDP_TX_PACKET_MAX_SIZE 512 #include <EthernetUdp.h> IPAddress remoteIP; unsigned int ...
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58 views

ethernet router in arduino using two enc28j60

I have read in the uIP manual that only one interface can be managed by the uip stack: "The uIP implementation is designed to have only the absolute minimal set of features needed for a full TCP/IP ...
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123 views

Arduino LAN/TP tester at some frequency

I have the notion of putting together a TP cable tester with an arduino. I've seen hacks sending power and lighting up a LED to check continuity, and used a similar 'professional' tester that just ...
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210 views

controllino and modbus tcp protocol

i have to make a network made of a master (made with controllino) and a slaves (also made with controllino) and they can comunicate with the modbus tcp protocol, i know that controllino works like a ...
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92 views

Ethernet.h Ethernet.Begin(mac) only connects if i have a LiquidCrystal object from LiquidCrystal.H

I have the following code; #include <Ethernet.h> #include <SPI.h> #include <LiquidCrystal.h> LiquidCrystal lcd(31, 30, 29, 28, 27, 26, 25, 24, 23, 22); byte mac[] = { 0xDE, 0xAD, ...
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331 views

Ethernet TCP communication between two arduinos not working

So I've got two arduinos Leonardo ETH, both plugged into a local network I host on my computer, and I'm trying to make them communicate through ethernet. One of my arduinos is collecting data from 2 ...
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140 views

Arduino Mega failing to connect to XAMPP database/php server to send HTTP requests

I have developed an application with a SunFounder Mega2560 with a W5100 Ethernet shield that acts as a server and successfully parses TCP message packets from a client sending in updates. I am now ...
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28 views

Remote Arduinos polling a master Ardrino over ethernet/wifi

I'm setting up a "Panic Button" for our Front Office. The concept is to have a master Arduino with the button and 4 other Arduinos with Strobes and/or alarms to alert the rest of the staff. The bells ...
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1k views

Ethernet Shield Issue

I just bought a Ethernet Shield for my Arduino UNO. I connected it to my arduino and flashed the Example code for Ethernet Shield, but the code didn't work. The COLL LED on ethernet shield is glowing ...
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878 views

How to create a Arduino socket server to receive messages

From linux I can send a socket message using netcat echo "Hello" | nc 88.109.110.161 100 But I don't know how to setup the socket server for listening incoming messages using the ethernet shield. ...
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199 views

UDP behavior different for STM32

I'm facing a weird situation, where the UDP behavior seems different in STM32 porting (stm32duino). Short question Besides port and address, what are the other parameters that characterize the UDP ...
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97 views

Arduino with Ethernet Shield with PC to upload data to Microsoft Azure

i am a student doing a project related to datalogging. My project is a rehabilitation device that uses 2 rotary encoders to record data for rotation and linear movement of a human arm. The data ...
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372 views

Can't parse large json file

For a project I've to parse a big json file. Unfortunately it does not work as expected. Here is the json file: { "data1": "...
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1answer
236 views

Limitations of connecting to many Arduinos via Ethernet?

I'm planning a project where I need to control a lot of Arduino Unos from a single PC. I'll need to send commands to the Arduinos and receive responses, as well as have the ability to update each ...
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116 views

Sending .wav via network

I'm working in a project and part of this project is sending a .wav file from an Arduino to other device (for example anther Arduino). I already am able to send a .txt file from an SD which was ...
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1answer
159 views

DF Robot W5200 Ethernet Shield for an Arduino Uno not working?

I've been working on using an ethernet shield for my Arduino Uno for a couple weeks now. I've been going through the problems one by one and now realise that there seems to be nothing transmitting. ...
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177 views

Cannot connect to database Ethernet Shield

I am using an LDR sensor to store its readings into the database. My code is as follows: #include <SPI.h> #include <Ethernet.h> const int ledPin = 13; //the number of the LED pin ...
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219 views

LED Webserver control not working

I've got an Arduino Uno and Ethernet shield, trying to test it out with a simple on off switch for the on-board LED. My Code is this // FILENAME = LED2.ino // SOURCE= http://www.instructables.com/id/...
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445 views

SPI communication between two Ethernet Shields (W5100)

I am a newbie to the world of IoT, I want to ask... Is it possible to connect two Ethernet shields with SPI? And if yes, how can I codes them? I have reference from http://www.gammon.com.au/spi and ...
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655 views

Reading values from Wiznet w5500 chip over SPI

I am trying to get the MAC address that is stored on the Wiznet w5500 chip. On page 29 - click here, it has the address of the values. It state that "This block can be selected by the BSB[4:0] value ...
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206 views

Web Page doesn't load when data is being received from Xbee

I have an Arduino Mega I am using as a simple web server. Right now the web page is two simple lines of text. There is an XBee radio attached to the unit to receive data from another unit. However, ...
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347 views

which Arduino UNO ethernet shield supports power over ethernet?

I ordered for this ethernet shield for my UNO as shown on the amazon website listing I was thinking to add power over ethernet module to take advantage of shield that supports adding POE module. . ...
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192 views

EthernetClient: HTML table isn't being fully populated

I have the following code below for an EthernetClient named client. It is supposed to print a 2 row, 9 column table. The headers are ID and Name and are the first cell in each row. The other columns ...
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315 views

WebClientRepeating not printing response to Serial

I'm following the tutorial in WebClientRepeating and it says that "The content of the page is viewable through your Arduino's serial window." However the output in my Serial window is just saying "...
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390 views

Problem using Adafruit nRF8001 (BLE) with Ethernet module on Arduino Nano

I'm working on Arduino Nano and I have to use both the Bluetooth LE module Adafruit nRF8001 and ENC28J60 Ethernet module using Ethercard The idea of the project is to receive data from smartphone via ...
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263 views

Suggest some ways to communicate (Rx and Tx) between Arduino and LabVIEW through Internet

Suggest Hardwares to use and also suggest some place to learn about IoT, video tutorials, websites, blogs, books etc. Currently I am using Xbees to communicate between LabVIEW and Arduino Mega. Most ...
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274 views

Arduino nano (clone) with ethernet shield only works when I open up serial monitor

#include <EtherCard.h> static byte mymac[] = { 0x7A,0x69,0x69,0x2D,0x30,0x31 }; byte Ethernet::buffer[500]; static uint32_t timer; const char website[] PROGMEM = "x0201g2.cloudapp.net"; ...
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265 views

Problems when communicating with SD card using ethernet shield

I am using the "SD read/write" code from the Arduino IDE examples to test an ethernet shield (clone). The problem is that although a file is created no data is stored in it. When running the serial ...
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554 views

Arduino uno RF transmitter and receiver, MYSQL

i tried to connect my arduino uno and ethernet shield with Mysql and everything works fine. Then I tried to connect the RF transmitter and receiver. I use a similar code, but i have problem with ...
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82 views

error C1083: Cannot open include file: 'Ethernet.h':

i'm trying to compile native code in VC++ using galileo sdk for windows iot. I've copied Ethernet.h file to the include directory of D:\galileo-sdk-develop\galileo-sdk-develop\source> but still ...
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529 views

Arduino Uno WebClient program not returning the exepected output

I have connected the Ethernet Shield to the Arduino Uno Board and do get the following error when I execute the WebClient program. Look like it's getting connected to the internet, because I am ...
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111 views

Best way to process data received by EthernetServer

I have a program where the Arduino acts as an Ethernet Server. The client continuously sends packets which is of the following format Start Byte=0x7E; Some Data/Command Bytes; //Can be of ...
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1answer
2k views

Ethernet shield and sd card not working togather on arduino mega

I am making a web-client with an Arduino mega and Ethernet Shield. I am trying to receive data from a web-server running a php script and saving that data to the SD card located in the Arduino ...
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29 views

Arduino web server-how to get values form URL

I’ve already searched through the internet but cannot find satisfactory answer. Is there an easy way to get value of variable passed through an URL? What I mean is I want to start a web server on my ...
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1answer
22 views

communication between two arduinos using ENC28J60?

How can i connect and send data between two arduinos using a ENC28J60 ethernet adapters on both of them. Is there any guides or example codes for me to take a look from or any library which i can use ...