Questions tagged [communication]

for questions about communication between multiple devices.

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5k views

How to Send Live Sensor Data to iOS Custom Apps with BLE

I am looking for a Bluetooth Low Energy (BLE) device that could send live sensor data from Arduino to iOS custom apps, not the app that is already in the app store. I would like to create my own apps ...
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1answer
224 views

Does WiFiClient work on a Yún to send data over a certain IP and port to be received by a Python socket?

I haven't been able to get the example code from the page WiFi:Client:connect() to work on my Arduino Yún. Is this not how I'm supposed to send data over WiFi to be read by something like a socket? ...
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1answer
17k views

Connecting two arduinos using WiFi

I have two arduinos (An UNO R3 and a Mega 2560), and I need to communicate them via two ESP8266 modules to exchange some values. In one arduino I'll use a SW-420 vibrarion module, and I need to send ...
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1answer
529 views

General Question about fast Serial Communication and Arduino

I'm looking for a fast (and safe, in terms of stability) way to send sensor data from an Arduino UnoR3 in real time to a Computer (in my case a MacBook Pro) with a sample rate of at least 1kHz. I ...
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1answer
2k views

Can you connect an output pin from one Arduino to the input pin of another?

I have a system that uses two Arduino boards. One is used to control several different functions, and the other is dedicated to driving a 45 second countdown display (comprised of two large 7 segment ...
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1answer
499 views

Serial communIcation from OS X app to Arduino Mega

I am new to stack overflow. I have a question regarding using the USB serial communication sending data from an OS X app to the Arduino Mega 2560. What happens is, when I have the Arduino running ...
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1answer
778 views

XBEE coordinator WITH or WITHOUT Arduino?

I am building a wireless system that has got an Arduino with a XBEE as the 'end user' and I need to acquire data/control that Arduino from a PC graphical interface. As far as I'm aware there are two ...
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2answers
1k views

Arduino Leonardo on Win 8.1 COM port disappeared

I've been using an Arduino Leonardo on my Windows machine for a few days now without too much trouble but today the COM port disappeared. I've been able to successfully send sketches to the arduino ...
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1answer
44 views

Checking connection/ communication

Can I ping or “hello world” an Arduino. Background: My son and I bought a 3-D printer kit. (EZ-3D) We are having some issues talking with it. (Well we can't talk at all.) So we thought to upload ...
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3answers
772 views

NRF24L01 Direct Communication Library Logics

Actually I'm using the RF24 Library mantained by TMRh20 (https://github.com/TMRh20/RF24). I'm trying to get some type of direct communication between multiple modules working, but I don't want to use ...
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0answers
20 views

Directly synthesising an OOK modulated LF signal using a CSV file

I'm looking to transmit some data (CSV files) from a measurement instrument underground to a receiver on the surface. I've learned that in order to penetrate the limestone, low frequencies have to be ...
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0answers
39 views

Windows Driver for Arduino error code 22

I'm trying to use avrdude to load an Arduino program with the console, but I have a Windows 7 x86 Professional with Service Pack 1 (old PC). When I install the Arduino driver that comes with the IDE ...
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0answers
35 views

WiFiNINA communication via SPI on the Nano 33 IoT

I am trying to understand how the WiFiNINA Lib is working on the Nano 33 IoT device. On the mentioned board the SAMD21G is connected to the ublox wifi module via SPI and I am studying how they ...
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0answers
20 views

Communicate/Configure with Pro Micro (using Joystick.h) from within Windows

I'm creating some Joystick-like controllers to augment simulator games. I usually use the Joystick library from MHieronimus which has worked great so far. Now, I'm using some non-momentary rocking ...
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0answers
29 views

Arduino serial issue

My arduino mega should be communicating with another card (ANET8) and also with a DC resistance meter (with python code) using 2 serial ports, one using the USB(resistance meter) and the other one ...
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1answer
26 views

Serial communication between nodemcu and Arduino Uno

For the last days, I am trying to establish serial communication between nodemcu and Arduino Uno but I failed to do this. Currently, I am working on a Home Automation project. I receive data from ...
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0answers
25 views

Communication b/w Arduinos, master(M) and slave(S) via Tx Rx pins. M sends query to S which shows the data in serialmonitor. S fails to send data to M

Slave code int arr[10] = {0,1,2,11,4,5,6,7,8,9}; char id = '1'; char re[2]; void setup() { // Begin the Serial at 9600 Baud Serial.begin(9600); } int ia; void loop() { Serial.readBytes(re,2);// slave ...
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0answers
29 views

Arduino communication

I want to message and call arduino board. I want some type of automation. But where should I get started I don't know I've tried sim900a module which was disappointing experience for me. Then I found ...
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0answers
31 views

Send message to multiple number

sim.println("AT+CMGS=\"+91xxxxxxxxxx\"\r"); I don't want to write this. I want to write mobile number on serial monitor in Arduino and on that number, i want to send message. how ...
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0answers
11 views

which kind of data are store If i terminate the call in sim800?

I'm working in SIM800 for DTMF based project. I want to know which kind of data are stored in the buffer during termination of call in SIM800. How to find if call was disconnected in SIM800? Also ...
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0answers
43 views

How could I combine sensor data with custom protocol und send it with Serial?

I am very new to Arduino. Now I am trying to send the sensor data to Computer. The sensor data will be stored as bytes into arrays. To build a robust transmission I'll pack the data with own defined ...
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1answer
41 views

Transmitting multiple values to the arduino, and Interpreting them with minimum delay

I am building an underwater robot, which can move Up/Down, Forward/Reverse, controlled by a Joystick. The situation is like this : USB Joystick is connected to a PC, PC is connected to an Arduino via ...
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0answers
97 views

Change arduino output from input

I'm trying to change values such that the arduino uno outputs comes from what is input, with the code, int PinOutput = 11; int PinInput = A0; int inph; int inpl; int input; void setup() { // put ...
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1answer
60 views

inconsistent digital output on simple code

so im new on arduino coding, and i made this code, where i input from serial monitor and then use it as a command for digital write. the problem is, sometimes the code work perfectly but then when i ...
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0answers
39 views

Program is executing but AT commands not showing in serial monitor

My purpose was to send SMS using GSM SIM800L coreboard and Arduino UNO. Here is the code #include <SoftwareSerial.h> //Create a software serial object to communicate with SIM800L ...
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0answers
464 views

Synchronous Full-duplex RS485 Communication with Arduino Mega

Context I have a really niche device called a "BIU" I'd like to communicate with using my Arduino Mega, but I want to get a second opinion before attempt anything as I cannot get another BIU if I was ...
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1answer
205 views

Flow control between ESP32 and RS323 device

I'm trying to communicate an RS232 device with an ESP32 (Heltec Wifi/LoRa 32 v2) my problem is that I don't receive any response from the device, doing some research, I'm thinking that the trouble can ...
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0answers
382 views

Bad Data : Arduino Mega & NodeMCU Serial Communication

Currently I am working on an Arduino project. The project required to establish communication between Arduino Mega and NodeMCU ESP8266. Here are some details about the project: NodeMCU Rx Pin is ...
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0answers
97 views

Reconnect to a com port

I want my Arduino to log data while connected to a battery. After few hours, I need to reconnect the Arduino via COM port to a PC and read the logged data. The com port will not reconnect. This is ...
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0answers
303 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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0answers
77 views

Communication between 2 arduino's one at 6th floor and the other at the basement

Communication between 2 Arduino's one at 6th floor and the other at the basement. I tried with nodemcu , but the signal is not reaching the basement. From 6th floor. Which is the best way to connect?...
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0answers
348 views

Sending Simultaneous Data from 2 NRF24L01 Transmitters to 1 NRF24L01 Receiver

I'm using three NRF24L01 transceivers, each connected to one Arduino Nano. One of the NRF24L01's is configured as a receiver, while the other two NRF24L01's are set as transmitters. Firstly, I'm aware ...
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0answers
44 views

Multiple arduino connections problem

I have 2 Arduino Mega 2560 connected via USB to my Ubuntu 18.04 machine. When I boot, one connects to /dev/ttyACM0 and the other connects to /dev/ttyACM1. Communication works perfectly. However, ...
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0answers
144 views

Creating PPM signal from 4 integrers

I am currently building a MultiWii based drone, I have built the emisor-receptor that interface 4 analog signals(4 potentiometers to control the drone) and it works perfect, the receiver(arduino Nano, ...
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0answers
313 views

Can't connect my ESP-12F to WiFi with my Arduino Uno

Recently I bought this wifi adapter for my IOT projects that I connected to my arduino uno that seems to not working. I have tried with the arduino ESP8266WiFi library with RX connected to pin 0 and ...
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0answers
190 views

Can't use MEGA as Transmitter and UNO as Receiver nRF24L01

I have a project with 7 May Deadline, i really need help on this. Here is the problem, I need to use my Arduino MEGA 2560 as transmitter and Ardino UNO(CH340G) as receiver. I can use uno as ...
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0answers
413 views

Ultra Long Range (200-500km) Arduino Communication using a Gibson Girl

I came across this article on Hackaday showing a simple AM transmitter sending a morse code tone 700km! I'm looking into a EPIRB for myself while deep in the bush / outback hunting or camping, just ...
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0answers
96 views

Problem I²C Communication between Arduinos

My Problem seems to be that my I²C slave randomly disconnects. I have an Arduino Due communicating with a Arduino Chestnut board (bought hardware). I now measure data with the Due and then send the ...
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0answers
82 views

Multiple Atmega328p wired communication

I am using multiple ATMEGA328Ps (4 ATMEGA328P) (OR Arduino Unos). The distance between two farthest ATMEGAs is 14 meters (One is Master Device and Other is Node), and other 3 are connected to each ...
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0answers
550 views

Arduino Square Wave Phase Shift by 270 degrees

I am using this code to generate a square wave with Arduino and shift it by 90 and 180 degrees. However, this code is not able to shift it to 270 degrees. Could you please suggest how may I modify the ...
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0answers
45 views

problem with communication between Linux and microcontroller [closed]

Hello Arduino community, I am new to the Arduino community and would like to ask for help (I work on a Arduino TIAN). Indeed, since 2 3 weeks I try through simple programs to understand the operation ...
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0answers
600 views

Manchester.h message format

I'm sending some data by 433Mhz transmitter using manchester.h library from here https://github.com/mchr3k/arduino-libs-manchester and I'm trying to wrap my head around message format. In manchester....
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0answers
443 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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3answers
6k views

Implement Visible Light communication using Arduino

I want to implement a simple VLC based communication system using two Arduinos and send messages/data/files between two PCs. For that I have a simple transmitter circuit with an LED on Tx side and a ...
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0answers
551 views

Arduino Serial Communication Issue

I state that I have already written a similar question on StackOverflow thinking that the problem is with my computer software. Anyway, after some shell debugs, I notice that the real issue is on the ...
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0answers
393 views

Connection between Arduino Mega 2560 , ESP8266-12F , PCF8574

Another start for achieving something new , I want to connect ESP8266-12F , Arduino Mega 2560 Board And the PCF8574 I/O Expander (I can use MCP23017 also) together , Where ESP8266-12F will take ...
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0answers
142 views

How to verify that my FTDI bridge for ESP8266 is communicating with my PC?

As I couldn't make my ESP8266 be programmed using an Arduino board as FTDI bridge, I decided to buy an FTDI232 board to upload code directly to ESP module via USB. However, when new I connected it to ...
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0answers
240 views

Getting some unknown characters while trying to connect my SIM900A to my PC [closed]

Im trying to connect my SIM900A. While trying to connect I'm getting some junk characters and not able to pass A T Commands Attached are the screen shot. Note:- Im getting the blue light blinking....
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1answer
114 views

Receiving live astronomical coordinates on Arduino Mega using telnet and ESP8266 wifi module

I'd like to receive on my arduino live coordinates of planets of solar system. Because there are already websites listing every planet coordinates, I thought it would be easier to just use a wifi ...
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1answer
358 views

XBee series 1 or 2? [closed]

I'm looking to buy some components to my master thesis: I have to create a sort of lab where I'll create a Zigbee network and some tasks on it. I'm wondering if I should buy XBee series 1 or 2 and ...

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