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Questions tagged [networking]

For question related to environment with networks.

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1answer
284 views

ESP8266 Peer to Peer with AP and STA - Cache AP Clients, Flush Their Requests?

I'm fairly inexperienced with Arduino and entirely new to networking, so bear with me. I've programmed a couple of NodeMCU devices to communicate the use of an instrument via activation of an LED. I ...
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1answer
1k 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 ...
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1answer
942 views

Secure HTTPS request fails 90% of the time

I'm using a NodeMCU, which is connected to an enterprise network at a school. The information given in the GET requests that the ESP8266 sends is sensitive, so naturally we want to make it secure and ...
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1answer
52 views

Regain WIFI connectivity

I wrote a code to be implemented in a SONOFF device (ESP8266 chip). My question is regarding disconnection due to failure/ power fail in wifi network - when such event happens, does wifi connectivity ...
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1answer
480 views

ESP8266 cannot create TCP connections to this particular server

EDIT: I have created an issue about this here: https://github.com/esp8266/Arduino/issues/4593 I have this server: 185.205.210.197 (Check that it works: http://185.205.210.197/) And I have this code ...
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1answer
187 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....
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1answer
2k views

Error 400. The request has an invalid header name ESP8266 (HTTP-POST)

I'm trying to send a http post to my server from an esp8266-Wifi (I use the ESP8266 library) I check all my http post format, and I guess is okay... but at the response, the monitor serial answer me ...
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1answer
279 views

WiFi connections being lost on connection reset

Look at the trick in the last few lines of this code: #include <ESP8266WiFi.h> const char* ssid = "xxxxx"; const char* password = "yyyyyyy"; // Create an instance of the server // specify the ...
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2answers
5k views

Cannot ping ESP8266's IP address from a computer on the same network

I have an ESP8266 module connected to my Arduino Mega 2560. I sketched a simple code to pass whatever command I typed from the Serial Monitor to ESP8266 and vice versa: void setup() { Serial.begin(...
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1answer
358 views

Open WiFi Configuration Automatically

Is it possible to have an Arduino Uno + WiFi 101 recognize when the USB cable has been connected and prompt a user to enter a network name and password? Can this be stored on the Arduino itself or ...
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1answer
936 views

Is there a practical way to broadcast and receive ascii payloads over ethernet or wifi?

How best might arduino nodes pass incoming serial ascii messages out as ascii network broadcasts for all others to receive and pass out through their serial ports? ie: typing a msg from the IDE ...
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1answer
274 views

How to network multiple Arduinos so they react to the same signal

I want to build a project that contains multiple Arduino nano's, each connected to one controlling Raspberry Pi. I would like to send one signal (a string of characters or numbers) which would be the ...
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1answer
155 views

How to return a message when calling by a TCP connection?

I am working on a communication between Android and Arduino board. The Android makes a TCP connection with the board and successfully sends some strings to the board. The problem is, there is an ...
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0answers
43 views

What the best way to connect an Arduino to 3G/4G

I want to make a connection to the mobile data network with an Arduino in an area with low signal quality. For this I already bought a better antenna and I am using a simcard wich is open to every ...
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1answer
38 views

Udp.endPacket fails

I am trying to send measurements over UDP, but the function Udp.endPacket continuously fails. I use an Arduino Uno WiFi rev 2, WiFiNINA library version 1.4.0 and WiFiNINA firmware version 1.2.1 which ...
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0answers
137 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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0answers
21 views

How can I control a slave ESP8266 from a local server and also from another ESP8266?

I have a power strip with a ESP8266 which is supposed to turn it on upon command from a OpenHAB server, or to stay on for a predefined time upon command from another ESP8266 (serverless). The reason ...
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0answers
50 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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0answers
155 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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0answers
41 views

I got a problem in sending voice file

I wrote a code that can send a file. If I send a text file it will work perfectly, but when I try to send voice it will send the whole file form the Sender side, but in the receiver side he won't ...
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0answers
60 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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2answers
62 views

Image Processing

I have a project I am working on where I need to check the pressure on a gauge using a camera. I am familiar with a little openCV programming using a laptop webcam. However, for this application, I ...
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0answers
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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0answers
85 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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0answers
77 views

Set up mesh network with RF Transceivers

I would like to set up a mesh network of Arduinos with the following features/capabilities: No master node Arduinos capable of bootloading other Arduinos through RFs Capable of communicating over TCP/...
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0answers
344 views

Wifi radio with an Arduino

I've done a Wifi radio with a headless Raspberry Pi in the past (connecting a radio MP3 stream available on internet directly on boot, without any user input), and now I'm wondering: would it be ...
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1answer
444 views

Best way to send text to ESP8266 remote display

I need a remote display to show information sent via WiFi from another ESP8266. What needs to be sent is a string along with some variables, for example a string to be displayed along with two ...
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votes
1answer
1k views

Unable to communicate between ESP-12E module and mobile through ESP-12E router

I am newbie in Arduino. I'm trying to send data from an ESP-12E client module to a mobile via an ESP router module (I am using Arduino IDE for programming the ESP-12E). For this purpose I ...
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1answer
124 views

SFML Packet and Arduino

Can the sf::Packet class of SFML-network be ported over to arduino for use with the Ethernet library or would it be too big? I'm working on a client-program where an arduino is a server and a regular ...
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1answer
980 views

WiFi UDP.endPacket() continuously fails

I am attempting to send data from my Arduino to my computer using the WiFi shield. However, my code is erroring out on UDP.endPacket(), and I do not understand why. Here is my code: #include <...
-1
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2answers
107 views

MAC address arduino

The MAC address is hardwired onto the NIC card when a device is manufactured. How is it that, we get to set a 48 bit MAC address of our choice while programming the arduino ?
-1
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1answer
256 views

NodeMCU Ping working on one but not another

Update 2: Have tested by pinging various devices on different subnets / vlans and did a pcap on the wifi AP I can see the icmp requests going through for each request except for ones on the 4.x subnet,...
-1
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1answer
172 views

Doesn't work radio transmission from Arduino Uno to Arduino Pro Micro

I have Arduino Uno, Arduino Pro Micro, XY-MK-5V and FS1000A. I need transmit data from Pro Micro to Uno. Transmitter: #include <VirtualWire.h> void setup() { Serial.begin(9600)...
-1
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1answer
4k views

Arduino TCP communication with Android phone

I am trying to communicate Arduino Uno with an android phone. What I trying to is: Android device post a string to Arduino Arduino post a integer to Android So far I can post message from Android, ...