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 on Arduino Mega Pin Usage!

I currently have an Arduino Ethernet Shield which is Mega Compatible. I've found on the Arduino Ethernet Library https://www.arduino.cc/en/Reference/Ethernet that the Shield uses different Pins on the ...
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30 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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31 views

MQTT on nano with Ethernet shield not working

I'm using an arduino nano with an ethernet shield (ENC28J60), and ethernet eem to be working (I can create a webserver with Ethercard library).However, i'm stuck when i try to connect to a MQTT ...
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17 views

detect a dropped tcp connection

Is it possible to detect a dropped connection using WiFi server? Example: Windows disables the Ethernet connection to the ESP during an active connection. After re enabling the connection it is not ...
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40 views

ethernet module works with uno, but not with nano

I use etherCard Library with ENC28J60-EDC8J60 ethernet module When plugging the "backSoon" example into an arduino UNO, everything works fine, but when i plug it into a nano, as seen in some tutorial ...
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14 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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15 views

connection to ESP using pyVisa

I'm building a small LXI device using a the OLIMEX ESP32 POE Board. Sending commands to the device using pyVisa works fine, but queries don't. Only the IDN? query works. From the ESP I get the ...
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45 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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20 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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171 views

Read SNMP OID values with Arduino

I wish to read SNMP predefined OID values from other devices, can it be done with Arduino? I searched all over the internet for the past 2 weeks about Arduino with SNMP and found a lot of great ...
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Arduino Micro + W5500 module from AliExpress

Got this module from Aliexpress W5500 Ethernet Network Modules For Arduino TCP/IP 51/STM32 SPI Interface 3.3V 5V I/O MCU ... and trying to hook this up to my proto Aduino Micro as thus: Micro -> ...
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118 views

Arduino HTTP Request Fails Slow Cellular Connection

Setup: Arduino Mega 2560 w/ Wiznet W5500 Ethernet Sheild Using TP-Link TL-MR6400 LTE router to connect to internet over cellular connection in Uganda. Using an HTTP Post with the following, ...
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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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80 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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1answer
96 views

Nano & Ethernet will not write to PushingBox on a workplace network (but will at home)

I have a Nano+ENC28J60 and I'm using Pushingbox which I have setup to write data to a GoogleDrive spreadsheet which works perfectly at home. However when I take it to my workplace it no longer works. ...
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40 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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5k views

Posting Arduino data via ethernet to PHP server problems

I am currently having difficulties sending data from an Arduino using an ethernet shield to a PHP database in MySQL. My problem is that it appears that the server is receiving the data as there is a ...
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1answer
270 views

Disconnect Ethernet Shield

I'm trying to use the Ethernet Shield and the EasyVR (voice recognition) together. The Ethernet shield uses the same pins that the EasyVR, but the easyVR works fine if I don't call Ethernet.begin(). ...
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1answer
486 views

Using c_str() on String for IPAddress with NTPClient provides wrong values

Libraries NTPClient Board Olimex ESP32-POE board Behaviour I have written a code that connects the board to a local NTP Server (which is an embedded board). I tried assigning the IP Address of ...
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2answers
3k views

Simple webpage serve with Arduino ethernet shield on SD card

I have been experiment with the arduino uno board from few days but can't seem to make it serve web page stored in SD card of ethernet shield. If I print the contents of the file to serial it works ...
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22 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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1answer
118 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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112 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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241 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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27 views

one Arduino with RS485 and Ethernet shields: does this work?

I'm planning to wire a few Arduinos together via RS485, and have one of them act as a hub that collects information from the others and presents it via http on an Ethernet connection. For instance ...
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2answers
4k views

Compilation Error: “cannot declare 'client' to be of abstract type 'Client'”

I know, it isn't my original code, but I'm using this for a larger project that I am currently working on. I keep getting this error message: "cannot declare 'client' to be of abstract type 'Client'". ...
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2k views

Unable to configure Ethernet using Arduino Uno R3

I have purchased an Arduino Uno R3 board and a LAN shield from these locations: Arduino UNO R3 Arduino LAN shield I am trying to configure Ethernet using this sketch: #include <SPI.h> #...
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29 views

My webswerver works fine when there is only 1 servo used/defined in my code

I am trying to make a webserver which controls my 3 servos for a robotic arm. When I define and use 1 servo it is nice and quick, but whereas if I use more than 1 the webserver is very slow and barely ...
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108 views

Public IP for Arduino with Ethernet shield and Arduino Uno

I'm new Arduino and I would like you to help me. I would like to have a public IP so that anyone can get access to it, not only from domestic domain. What could I do?. I'm using Arduino Uno, Arduino ...
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195 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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906 views

Connect to Ethernet2 by hostname

I´d like to connect my Ethernet2 with WIZ550 using DHCP but instead of Local IP, I want to use Hostname. This is my code, it works. I get a Local IP Address and I can connect to Arduino using this IP,...
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199 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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2k views

get request with ENC28J60 Ethernet module

I try to make a simple http get request from Arduino uno to my website (shared hosting) where i fetch the data to db. I use the EtherCard library and ENC28J60 Ethernet module. Here is the code: #...
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0answers
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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0answers
169 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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0answers
80 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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6answers
41k views

How to get HTTPS on Arduino?

Put plainly: is there a way to get an HTTPS connection on the Arduino? I have been looking in to it, and I have found it is impossible with the standard library and the Ethernet shield, but is there ...
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1answer
485 views

Arduino connection with the server failed

I am trying to connect arduino uno and ethernet shield and try to send some data to an asp.net web api application. When i upload the sketch, i get in the serial monitor connection failed. I don't ...
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2answers
2k views

W5100 Ethernet Shield to Custom Board Problem

I've been using an Arduino Ethernet shield and an Arduino Mega in my project, but now I'm trying to migrate all the components onto my own PCB. My board uses a W5100 same as the Arduino, but nothing ...
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55 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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92 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
127 views

Mini ethernet shield pins don't have SI

Please somebody who had the same issue help me. The question is how to connect this Mini Ethernet shield to an Arduino. The main problem is the pins that my shield have or haven't; my current ...
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59 views

STM32F103C8 reset button not working

I am working project, using STM32F103C8T6 and W5500 Ethernet module. My project is something like network relay. My problem is that the STM32F103 can not boot up after pressing reset button when the ...
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1answer
65 views

Send files via network [duplicate]

I want to send a file from an Arduino to the server or another Arduino. I wrote a code that's open the file then write the content of the text on an array and then send it. That would work if the ...
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65 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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3answers
537 views

Arduino for delivering a WoL signal over ethernet, when receiving a specific command over WiFi

I'd like to assemble a device that could accomplish the following: Connect to my home wifi (WPA2-Personal) Connect to my home PC with via Ethernet cable Able to send WoL signal to the PC when getting ...
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2answers
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Get image from Arduino Ethernet Shield sd card

I have a code that uploads the temperature and humidity from a dht22 to a website. Now i want to add an image to the "add to homescreen" button in safari on ios. Apple has a html code for this: &...
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23 views

WebClient Not Working On Shared Network

I'm working on a school project, and I use Arduino Uno to collect some data with sensors, and then send it to an online database. The Arduino is connected to the Internet via an Ethernet Shield and an ...
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229 views

Ethernet Shield - Not Working Properly Always

I'm working on a school project and using Arduino Uno. The basic working method for the project is as follows: Read temperature from LM-35. Read CO2 level in air using MH-Z14A. Upload data to server ...
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2answers
342 views

Trouble reading LM35 with long (?) Ethernet connection

I have a quick question to ask. I have an Arduino Uno reading 4 temperature sensors (LM35) in 4 different rooms. What happens is that the two nearest rooms give stable values, while the two further ...