Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

1
vote
0answers
26 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 ...
0
votes
0answers
26 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 ...
0
votes
0answers
44 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": "...
1
vote
1answer
43 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 ...
0
votes
0answers
24 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 ...
0
votes
0answers
44 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 ...
0
votes
1answer
59 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 ...
0
votes
1answer
29 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 ...
0
votes
0answers
29 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 ...
0
votes
0answers
16 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 ...
0
votes
0answers
99 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 ...
1
vote
2answers
203 views

Remotely uploading code to an Arduino board over the internet [closed]

I recently used Particle Photon that allows me to upload firmware (.bin file) remotely over the internet. I would like to use something like this for my Arduino but I cannot find anything like that. ...
0
votes
0answers
44 views

Arduino Ethernet shield not connecting

Im trying to connect my Arduino Mega 2560 to my ethernet shield generic HanRun HR911105A, however im having some troubles, im runing the ethernet example that comes with arduino IDE. I give arduino ...
0
votes
1answer
50 views

WSO2 IoTS : No Data shown on Server by Arduino connected via Ethernet

Description: While enrolling Arduino device on WSO2 IoT server, I made necessary(WiFi to Ethernet connection) changes in the sketch that I downloaded from the server and uploaded it. The following ...
1
vote
1answer
208 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 ...
0
votes
1answer
76 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. ...
0
votes
1answer
77 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. ...
0
votes
2answers
1k views

Modbus IP with Simply Modbus TCP

include SPI.h include Ethernet.h include Modbus.h include ModbusIP.h //Modbus Registers Offsets (0-9999) const int SENSOR_IREG = 100; //Used Pins const int sensorPin = A0; //ModbusIP object ModbusIP ...
0
votes
1answer
107 views

How to flash an ATMEGA2560 using a WIZnet 5500?

I am wondering if anyone has ever flashed a ATMEGA2560 utilizing a WIZnet 5500? I have looked at this bootloader package but it only supports the 5100. I may have to do it myself but am a little ...
0
votes
1answer
661 views

Using AysncUDPMessage for ESP32 to send string data

I am in search for some examples as to how can one use the AsyncUDPMessage in an Application for sending out UDP packets to a host with specific IP address and Port number from an ESP-WROOM-32 (Olimex ...
0
votes
2answers
2k views

Ethernet nodemcu

I have a question that might be a #noob question but I am wondering if there is a board similar to the nodemcu in size that runs arduino code but instead can use ethernet to connect to the network ...
0
votes
1answer
32 views

Ethernet socket impedes adding shields

I just bought a KEYESTUDIO W5500 Ethernet Arduino without realizing that the Ethernet socket on the board impedes adding any additional shields to the device because: Horizontally the socket runs ...
0
votes
2answers
760 views

How to store an RFID tag number in a string

I want to send RFID tag number to PHP page. So far I have sent a fixed string to php and it worked, now I am not getting data in string when i scan rfid tag. I want to store every RFID tag number in a ...
0
votes
0answers
61 views

Proxy/Controller for Arduino

I was making a small app with an arduino shield and a restful API library. For what I need it works great but the only problem I'm having is simultaneous connections, with more than one connection to ...
1
vote
0answers
64 views

Directly connect Arduino to Macbook over Ethernet

I am trying to connect my Arduino to my MacBook over ethernet via a thunderbolt-ethernet dongle. However, I am unable to access my Arduino over Ethernet. The problem is very similar to one mentioned ...
0
votes
2answers
152 views

if two arduinos are connected by I2C and one of them is using an ethernet shield, does that grant both of them access to the internet?

i have two arduino mega and they send data to each other by an I2C connection. But one of those arduinos is connected to an ethernet shield which allows it to send data to a web server. Being both ...
1
vote
0answers
796 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 ...
0
votes
0answers
28 views

Using USB or ethernet to carry digital signals

I need to send six digital signals about 4 feet through wires. An ethernet cable has 8 little wires that should do the trick. I could split the ends and solder them to my boards. Is there an adaptor ...
0
votes
1answer
60 views

Uno R3 connected via Ethernet shield becomes unreachable after a few minutes

I'm setting up an Elegoo Uno R3 with a Seeed 5200 ethernet shield to monitor water flow and temperature. It needs to run unattended for weeks at time (being called several times a day by a remote ...
0
votes
0answers
101 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 ...
0
votes
1answer
139 views

Peer to Peer using Ethernet Module

I'm beginner here at arduino stuff. i just started learning arduino and i have this small homework where i NEEDED to connect 2 arduino using ethernet shield or module ONLY over a distance of 20 meters....
5
votes
2answers
599 views

Is the arduino hackable when using communication shields?

Let's say I have an arduino Uno connected to a W5100 ethernet shield. The arduino communicates with the ethernet shield using the tx0 and rx0 pins. When I upload a new script to the arduino using USB, ...
-1
votes
1answer
61 views

Ethernet connection - how to send data from interrupt

I have question similar to old topic here Any way to pass EthernetClient to function outside of loop automatically? I have in the main loop opening of the TCP server which is just maintaining the ...
0
votes
1answer
333 views

Preventing relay switch-off crashing Ethernet controller

I have an Arduino Uno with Ethernet Shield controlling some relays. Initially everything works fine but then when switching the relay off, the Ethernet controller frequently 'crashes'. Ethernet stops ...
1
vote
0answers
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: #...
0
votes
1answer
198 views

http request in time intervals

I'm doing a program that receives data from a web page every so often, but only receives the data once and then receives everything blank. I need help to receive the data every time indefinitely. I am ...
0
votes
1answer
425 views

How to connect an Arduino via an ethernet cable to a laptop directly?

Maybe a silly question, because it is a usual topic, but I have a problem with my Arduino Leonardo ETH. I want to create a web server on the Arduino with the example sketch File > Examples > ...
0
votes
1answer
3k views

Arduino Nano + RC522 + w5500 Ethernet Module

has anyone had any experience wiring up an arduino nano with an RC522 RFID module and a W5500 ethernet module? i can get each of them to work individually, but i cannot get them to work together. i am ...
0
votes
2answers
330 views

How to get a character from a serial Parsed http response? [closed]

I am a web developer and I am struggling with C code on Arduino. So this is What I have: I have a backend written on PHP that returns a 0 or 1 depending of wether a pin should be high or low. I have ...
1
vote
1answer
1k views

Send HTTP request from Arduino Ethernet to server on PC

I am simply trying to send a simple HTTP request from an Arduino Uno with w5500 Ethernet Shield to a local server running on my PC. The two are connected via a crossover ethernet cable and I am able ...
0
votes
3answers
2k views

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 -> ...
1
vote
1answer
327 views

Grounding issues Arduino Ethernet Shield makes WS2811 LEDs flicker

I have an Arduino Due with an Arduino Ethernet Shield V2 that I use to control multiple daisy-chained WS2811 LED strips. When I turn on most of the LEDs the Arduino and attached wires seem to become ...
0
votes
1answer
388 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 ...
0
votes
1answer
251 views

Transfer byte-buffer with ENC28J60

How do I transfer a series of byte[256]-buffers to a server with an ENC28J60 Ethernet adapter? I get blocks of uint8_t from an Arducam camera module and I'd like to transfer them to a host. Does ...
1
vote
1answer
334 views

RFID does not respond after Ethernet.begin(mac, ip) initialization

Good day, I have this problem with my simple project. I have a database with all RFID number of employee. What I want to do is to use an rfID to check if it is registered in the database. If it is, it ...
6
votes
3answers
537 views

Multiple SPI device

I want to connect Ethernet board (W5100 HR911105A) to Arduino Leonardo with SPI and I also want to connect SD reader. When I test these boards separately everything working. But when I connect them ...
1
vote
0answers
179 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/...
0
votes
2answers
385 views

Arduino Ethernet Shield 2: How can I automatically determine the MAC Address?

I'm using an Arduino Mega. I know that Ethernet Shield 2's come with a sticker with the MAC Address printed on it. This would imply to me that this address is hardcoded into the shield. Is there any ...
0
votes
1answer
1k views

is there a timeout for Ethernet.begin?

I'm working on a project, but just for testing, I haven't connected it to the internet yet, even though the code SHOULD be ready to roll out. When trying to test some of my code with the serial ...
1
vote
1answer
56 views

Lifespan of a hot microchip [closed]

I'm currently building my own Home Automation System with a bunch of Arduinos and Relais, all of them wired to Ethernet "Shields". The casing I am printing on a 3D printer. The Arduinos work great ...