Questions tagged [communication]

for questions about communication between multiple devices.

94 questions with no upvoted or accepted answers
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Arduino Uno WiFi - How to disable WiFi?

I'm using Arduino Uno Wifi. I made my Arduino to get connected with my local network based on http://www.arduino.org/learning/getting-started/getting-started-with-arduino-uno-wifi Now I would like to ...
3
votes
0answers
606 views

ESP8266 and Arduino bidirectional streaming from and to a website

I was looking for some easy tutorial on bidirectional communication via ESP8266 connected to Arduino UNO. I want to send and receive strings from and to JQuery based website. However, I couldn't find ...
2
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0answers
65 views

Is a PWM phase duration set with OCR1A a reliable way to communicate values to other Arduinos?

I am working on communicating 4 switch states across multiple Arduinos using only one pin. It must be as fast as conceivably possible. Currently I have a master Arduino reading all 4 switches (...
2
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0answers
37 views

Serial communication detect

guys. I am workin on a project. I have two channel for Serial RS232 communication. Main and Stand-By channel. If Main channel has some problem and, cannot communicate for 15 seconds then I want to ...
2
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0answers
25 views

Problem displaying data sent from Arduino Mega to Arduino Mrk1000 using serial communications

I've been doing a personal project. The idea of the bigger project is to feed my fish using a robot. My specific problem is that I would like to see some data from the various sensors that I will be ...
2
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0answers
67 views

SPI Arduino slave not recieving data correctly

Using an STM32L476RG Nucleo microcontroller board as the SPI master and an Arduino mega as a slave with pin 52 for SCLK, pin 53 for SS and pin 51 for MOSI on the Arduino. There is no issue with the ...
2
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0answers
49 views

nRF24L01 +pa +lna link does not communicate

I’m trying to create a link between two nRF24L01 units. Each nRF24L01+-based module (purchased) is connected to Arduino Nano on a custom-designed PCB. The printed wiring is per the hardware ...
2
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0answers
141 views

Real range of long range transceptor LORA RA-02 SX1278 with Arduino UNO

I'm working in a project where I have to send data from long distances (about 1 km) between 2 Arduinos UNO which are powered by computer's USB ports. The place is a small city with no large buildings. ...
2
votes
1answer
128 views

RS-485 Serial communication problem with arduino

I use 485 modules to transmit data serially from one arduino uno to another uno. If I connect the 2 arduino boards directly without using the rs485 module, the data is sent and received without a ...
2
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0answers
348 views

why is memcpy of unsigned long killing my sampling speed?

I'm using a Mega 2560 to communicate with a mixture of analog (i.e. measured via analogRead()) and I2C based sensors. Sampled data is placed in a 16 byte array, then written to an SD card once a 512 ...
2
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0answers
167 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, ...
2
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0answers
93 views

Can I configure pairing for HC-05 and Arduino, and use the HC-05 without Arduino after?

I have a system that is outputting data via its serial, and I need to relay that data to my PC wireless-ly. If I were to setup an Arduino and HC-05 at the system's side to relay the data, that would ...
2
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0answers
68 views

Unicast image transmission using Xbee

I've been working on image transmission using XBee S2B Pro modules and Arduino Mega. Main task is to transmit a jpg image taken by a jpeg serial camera at the transmitter and send it to a microSD ...
2
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0answers
2k views

Reading +IPD response from serial.read() using Arduino UNO and ESP8266

I have a python server running on my PC and I am using an Arduino Uno (wifi enabled by a ESP8266 chip) as the client. I can make the the server and client communicate using AT commands as shown below: ...
2
votes
2answers
6k views

DFRobot GPS init error [Arduino Uno, SIM808]

i have problem with initialization DFRobot SIM808 actually when i try to recieve gps data by SoftwareSerial only it does works (i mean examples based on sending and reading command to and from serial'...
2
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0answers
1k views

Arduino Uno doesn't work as Manchester code receiver

I'm sending some data from ATTINY85 to Arduino UNO using 433Mhz modules. Coding is Manchester using Manchester.h library from here. Transmitting data works perfectly, 433 receiver gets data alright. ...
2
votes
0answers
624 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....
2
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0answers
449 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 ...
2
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0answers
566 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 ...
2
votes
1answer
662 views

ADS1262 and 2.2 SPI TFT (Two SPI Slave) with Arduino

I am interfacing two SPI slave module i.e. ADS1262 and 2.2 SPI TFT with the Arduino Ethernet board. When I test each device on its own it works. Initially, I interfaced the TFT to the Arduino and it ...
2
votes
0answers
53 views

Arduino clone changing its serial port on slight physical displacement, even during an ongoing serial communication

I'm using an Arduino clone for serial communication. However, as soon as I even touch the board, it resets, and the serial communication stops. When I view the serial port using the 'Tools' menu of ...
2
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0answers
154 views

master slave control of 2wd robots using xbee

Hi there I just need to ask you how I can send command from master robot to slave to follow using XBee. I have configured both the XBee in AT mode, but I totally don't have the clue how the program. ...
2
votes
0answers
1k views

Sending GPS data between two Arduinos using Easy Transfer

I'm trying to get GPS data transmitted from one Arduino UNO to a second unit to eventually be displayed on an LCD and stored in an SD card. I am using Xbees S2C's on Xbee Shield's to do this. The ...
2
votes
0answers
390 views

Communication serial port with matlab

I am trying to communicate with a serial port trought matlab. This is my code: delete (instrfindall) clear all close all clc; s=serial('COM4'); set(s,'BaudRate',4800); set(s,'DataBits',8); set(s, '...
2
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0answers
194 views

Receiving and transmitting messages simultaneously

tldr; I am writing a mesh network software using arduinos. I need to wirelessly receive, process, and transmit data, all simultaneously. I am aware of protothreads library, and the other software ...
2
votes
0answers
2k views

Pelco D Library for Arduino

Does anyone know of any Pelco D libraries available for Arduino? I already have a PTZ joystick controlling 3 PTZ cameras, but I would like to add an Arduino 'intelligent' controller capable of ...
2
votes
0answers
454 views

Serial Monitor Just Stops Working

I am communicating with two Arduinos with serial. The program works great for a while but then the serial monitor stops showing values in the RX code and will not work again unless the code is ...
2
votes
0answers
622 views

Arduino Uno - Firmata/Serial Communication in Visual Studio C++

I need to pass std::vector <double> values from a C++ console program (written in Visual Studio 2015) running on a PC to Arduino in real-time using USB serial communication. Can anyone of you ...
2
votes
0answers
732 views

Chat between Xbee and Arduino

I'm very new with this devices so I'm a bit confused. I've got two Xbee modules series 1 and an Arduino UNO. I want to make like a chat between the two Xbee modules, one of them connected to the PC ...
2
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0answers
236 views

Programming Arduino for Mindflex

I am learning brain wave programming from Tinkernut tutorial. #include <IRremote.h> #include <IRremoteInt.h> #include <Brain.h> IRsend irsend; Brain brain(Serial); const int ledPin ...
2
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0answers
49 views

WLAN module compatible with ArduiMU V3+

Current I use my ArduiMU V3+ with a Bluetooth Mate (from Sparkfun) but I've got a lot of connection problems with it. I'm looking for a better solution involving WLAN and am wondering whether there ...
2
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0answers
44 views

Connect push button to ArduiMU

I've got an ArduiMU V3+ and would like to connect an ordinary push button to it. How would I connect it to it.
2
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0answers
1k views

Arduino code issue (using Bluetooth and Rfid technology)

I am building a device that communicates with my Android phone. I know that my App works but my Arduino code seems to have a problem. So I have made a smaller programm and everything works fine there. ...
2
votes
0answers
147 views

I2C with an arduino, a PI and an IO expander

im working on a project which requires alo i/o pins. For that reason i bought a pcf8574P 8bit I/O expander which uses the I2C protocol. The problem is how to combine the Rasp PI and the arduino. For ...
2
votes
1answer
1k views

How do I use I2C from an Arduino Uno when I have a GSM shield mounted?

This may be an extremely obvious question but I don't seem able to find a definitive answer. I have an Arduino Uno and a Sim900 GPRS/GSM shield fitted on top of it. I had I2C working on the Arduino ...
2
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0answers
226 views

Arduino based temperature sensing circuit

I've currently got a setup where I am using a 2 thermocouple setup using MAX31850 and the circuit looks exactly as mentioned here using the external power option. (https://learn.adafruit.com/adafruit-...
1
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0answers
19 views

Interfacing IOT- GA6 to Arduino

Good evening guys, Looking for any help on interfacing the above GSM/GPRS module with arduino. Connections: VCC and GND of module- separate power supply, 5v 3A URX to pin 2 UTX to pin 3 Common GND ...
1
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0answers
39 views

No communication between two stations that include Arduino Nano and nRF24L01

I'm struggling to establish a link between two Arduino Nano using nRF24L01 (the module that contains PA and LNA). I assume I made a coding mistake (May be in the setup method?), and I need help in ...
1
vote
2answers
32 views

SIM800L and UNO can't request web page

I know this module is super old but the network I am on still uses GPRS so should work. This is the module: I am using the Adafruit example scipt FONAtest. I can connect to GPRS <--- SHUT OK ...
1
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0answers
44 views

ARDUİNO MODBUS TCP CONNECTİON

I am trying to communicate with PC by using modbus TCP communicate. When I use this code I can't communicate. Dou you know guys what is the problem? My ethernet Module is working I know that because I ...
1
vote
1answer
99 views

Message is sent multiple times from one arduino to another, using nRF24L01

I am trying to build a bidirectional communication channel, using nRF24L01 and two arduinos. The message is introduced using a button (but) in Morse code, decoded and then sent when another button (...
1
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0answers
23 views

Arduino MKR GSM 1400 project - Establish call - Wait and hang call

I am implementing a GSM project using the Arduino MKR 1400 GSM board and I would like to achieve the following: Establish a call to a specific number, wait for a certain amount of seconds and then hag ...
1
vote
1answer
64 views

MKR 1010 disconnects COM-port on each upload

Each time I attempt to upload to the MKR WiFi 1010 board the COM-port gets disconnected, usually at one of the following points: Either it disconnects just after compiling/verifying. In this case the ...
1
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0answers
38 views

processing data received via serial

Hey i'm trying to make an Arduino that can log key presses from a keypad and save that as a variable. When it receives information from another arduino via serial I want it to create a variable from ...
1
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0answers
22 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 ...
1
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0answers
43 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 ...
1
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0answers
32 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 ...
1
vote
1answer
57 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 ...
1
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0answers
26 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 ...
1
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0answers
30 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 ...