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Questions tagged [ethernet-shield]

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Unable to send serial data received over RS485 on ethernet

I have connected multiple Arduinos using Max485. I am trying to send data received over RS485 to ethernet using Ethernet Shield. I have modified rolling master solution provided by Nick Gammon. Now ...
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1answer
15 views

Adding POE to Ethernet Board

If I was to use the Arduino A000024, would I be able to add a POE MODULE to the board to get a Ethernet board with POE to run my arduino project?
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1answer
58 views

Two ports on Uno with ethernet shield

I am making an Arduino mod-bus device and I want to make a webpage as well that will allow me to reset the unit if there is any issues remotely. To do this I would need the mod-bus to operate on port ...
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1answer
57 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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1answer
24 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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1answer
85 views

How to create a weather station with only GY-BME280-3.3 chip and w5100 Ethernet shield mounted over arduino mega 2560 r3

Want to create a weather station with only GY-BME280-3.3 chip and w5100 Ethernet shield mounted over Arduino mega 2560 r3 but I have no previous experience with Arduino. And The Arduino will be hooked ...
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2answers
107 views

Can client IP address be obtained from Arduino Ethernet2 library for W5500 during client.connected() call?

I've found posts explaining how to get client IP by modifying the W5100 Ethernet library and the Adafruit CC3000 library but not the Ethernet2 lib for W5500 chip, which is different enough that the ...
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1answer
14 views

Serial string readout analyzed and logged onto an SD card [closed]

I have a sensor that gives me this string, serially read @9600: @T;+019.8;H;043.6;51 This burst arrives automatically about every second. It means: "@" start of the string "T;" means the ...
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2answers
491 views

Connecting Arduino ethernet shield (ip address - 0.0.0.0)

I need some help to connect my arduino uno R3 and ethernet shield. I don't have a mac address with my shield so I'm using this one: byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; The Ethernet ...
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0answers
31 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 ...
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0answers
46 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 ...
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1answer
52 views

Arduino and ESP8266 communication over wifi [closed]

I need to same advice, how to realize communication between ESP and arduino over wifi. I have connected temperature and pressure sensor to ESP, and I need to get this data from sensor to arduino. ESP ...
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1answer
43 views

how to establish a connection between an arduino and a web server? [closed]

I want to establish a connection between my arduino mega ( which is connected to an ethernet shield so internet access is available) to a web server. Any idea how the code should be? I searched for ...
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2answers
102 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 ...
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2answers
44 views

I am new to arduino please help me in understanding this code

while (client.connected()) { if (client.available()) { char c = client.read(); Serial.write(c); Why we require char c and what is the use of using this command Serial.write(c)
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1answer
40 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 ...
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0answers
62 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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1answer
65 views

Will adding Ethernet shield reduce the IO count of Arduino?

I have searched this question but could not find an answer on this site. There was a related question - Latest Ethernet shield - used pins, how to bypass restrictions on arduino forums, but, I was ...
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2answers
51 views

Why Ethernet webclient fails to initiate?

I use the Ethernet shield with an Uno and create a web client. If I put a delay like one second for initialization it works fine. However if I wait for it in a while loop (like waiting for the serial, ...
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1answer
154 views

Ethernet shield compatibility

Does anyone know if there is an Ethernet shield is compatible with the Arduino Ethernet shield (R3)? The R3 does not seem to be in production anymore and I need a replacement shield. Found some from ...
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1answer
1k views

Arduino HTTP Post request

I have a Arduino Mega with Wiznet 5100 Ethernet shield. Am trying to post some data onto localhost for started later on which will be accepted by a website. But when I try to post the data I get some ...
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89 views

Combining mysensors with SD card (on an Ethernet Shield v2)

I'm trying to combine a MySensors network with the usage of a SD card. Currently I'm working with the SD card reader on the EthernetShield v2. The NRF24L01+ chip I'm using is also using SPI but we ...
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1answer
1k views

How to connect an Arduino and a WAMP server's MySQL database?

I'm trying to connect an Arduino Mega to my WAMP server's database using MySQL connector for attendance logging. But it shows "Connection failed". What is my WAMP server's IP address? I connect my ...
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1answer
871 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 ...
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188 views

acs712 zero point problem

I have Arduino Uno R3 with: Ehernet shield 4x ACS712 20A boards measuring AC current 4x relay board. Power supply is wall mount USB adaptor 5V 2A. If all relays is off, measured voltage in arduino ...
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2answers
53 views

Help adding 3 more on/off switches so that I can control 4 LEDs

This code is working fine to switch on/off one LED. Can anyone help me add 3 more on/off buttons so that I can control 4 LEDs? #include <String.h> #include <SPI.h> #include <Ethernet.h&...
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1answer
174 views

Known conflicts between use of HC-12 and Ethernet Shield on Mega2560? [closed]

I have two somewhat similar sketches that use both HC-12 [for data collection] and a W5100-type Ethernet Shield [for Email construction and transmit]. Both sketches run fine until the code for the ...
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0answers
295 views

Difficulty connecting arduino ethernet with PC using a switch

Facing difficulty connecting arduino ethernet(w5100) with PC using a switch (Dlink). When both are connected directly(p2p) using ethernet cable, arduino device can be pinged. However, when connected ...
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1answer
2k views

My Arduino Ethernet shield is not working

Actually I'm using a W5100 Hanrun HR911105A 16/02 Ethernet shield with an Arduino Uno (original). I tried this code from the examples: #include <SPI.h> #include <Ethernet.h> // Enter a ...
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1answer
351 views

Arduino Ethernet shield cannot establish connection

I bought a Chipdot Ethernet shield from Amazon. It does not have any MAC address on it. I connected this shield to an Arduino Uno. I tried to run the DHCPAdressPrinter code from Ethernet library on it,...
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2answers
1k views

Is Arduino Ethernet shield compatible with arduino due?

Arduino Due's operating voltage is 3.3 volt and Ethernet shield operates on 5 volt supply. So my question is that this Ethernet shield will work on an Arduino Due and also if it will not harm the ...