Questions tagged [communication]

for questions about communication between multiple devices.

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87 views

nRF24L01+ Unable to set address

I'm trying to communicate between Arduino Nano and Arduino Uno using nRF24L01+. I tried using RF24 by ManiacBug and TMRH20, but when I open the serial monitor after uploading the Example Programs ...
1
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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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1answer
53 views

Can I read using an analog pin on an arduino Mega whether or not there is a high (5v) voltage on a wire from another board's digital pin?

I am making a peer-to-peer network of initiating devices and a common hub, which controls most of the hardware. It sends a number over Serial to Mega's Serial1 (Mega's Serial is used for communicating ...
2
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0answers
92 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 ...
0
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2answers
691 views

What functions are disabled with noInterrupts()?

The Arduino page for noInterrupts() says: Some functions will not work while interrupts are disabled, and incoming communication may be ignored. While it may not be possible to give a complete ...
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0answers
83 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 ...
5
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3answers
23k views

Sending a value from one arduino to another

I wonder if it is possible to send a value from one arduino to another. Basically, I have one arduino measuring let's say weight, but I want to display that value using an lcd in another arduino. ...
0
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0answers
362 views

Device is not online yet while trying to connect Arduino uno (with USB) to Blynk App

I am trying to run my Arduino Uno using Blynk app. I have Arduino IDE , Blynk library on the same folder within the Arduino library folder, changed the AuthCode using the one provided , checked all ...
2
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2answers
7k views

How do I communicate with a sensor via an Arduino's RX/TX ports?

I have a sensor that communicates via serial communication. CTi Sensors TILT-05. It transmits an ASCII string with data separated by commas. I want to be able to read the incoming ASCII data in the ...
0
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2answers
343 views

What could cause data to be printed correctly, then incorrectly and then repeated? CAN bus / general transmission

I am attempting to send data from an MPU6050 connected to an arduino uno to another uno via CAN bus, however i don't think this is a CAN bus specific issue. In short, i am sending two packets of 8 ...
4
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2answers
694 views

Using Arduino and XBee at the same time

I have 2 Arduino Unos, 2 XBees and 2 Wireless Proto Shields. The first setup has a humidity/temperature sensor (SHT21P) and it writes data to serial and it works (I've tested it). Now, the other ...
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1answer
1k views

Preforming impedance termination for UART Communication (TX and RX) pins

I need two Arduino devices (Arduino Mega and Nano) to communicate with each other via UART. The two Arduino devices are long distance apart from each other. The distance is 1.5 meters. The Arduino 1 ...
2
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1answer
366 views

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 ...
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. ...
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2answers
2k views

send more than one byte at a time SPI Arduino

I have recently been trying to send integers via SPI between two arduino Uno's. I am using the first example of Nick Gammons tutorial, and trying to modify it to get a basic understanding of how to ...
3
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2answers
2k views

Could I Connect many Arduino Nano boards together?

I want to know if I could connect many Arduino Nano boards together (Example : 10 boards ) , Also i want to know if there is any problem in Communication between them using I2C , could this affects ...
0
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1answer
341 views

Unable to receive data when using multiple SoftSerial on Arduino Nano

I am trying to use several (four) software-based serial ports to talk to different peripheral hardware. However, I am unable to receive data through the SoftSerial when using more than one software ...
0
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1answer
131 views

CAN-Bus shield, SD-card module & LED_BUILTIN use D13; possible collision?

To my knowledge the SeeedStudio CAN-Bus shield utilizes D13, and so does the SD-card module I use. And also Arduino Uno's LED_BUILTIN is 13. Am I in danger of some sort of collision here? I have read ...
1
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1answer
135 views

RH_RF24_MAX_MESSAGE_LEN in RH_RF24.h

I use RH_RF24.h to control Si4463, and realize some simple communication between two Si4463 . But I don't know the mean of RH_RF24_MAX_MESSAGE_LEN in this example. RH_RF24_MAX_MESSAGE_LEN is a ...
0
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2answers
94 views

Arduino Serial Writing Array Problem

I am trying to communicate Pc - Arduino Uno. My Arduino code is here: (It is working as below) int ndx = 0; char pack[12]; void setup() { Serial.begin(9600); while(!Serial){;} } void ...
0
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1answer
168 views

How to upload program to custom arduino board without USB FTDI and making it read only? [duplicate]

If I was to mass produce a microcontroller board I have designed based around the atmega328 (very similar to an arduino uno) but for one embedded task where I want one program only to be stored on it. ...
1
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1answer
41 views

Do I need a full Arduino board hardwired to a sensor to send data via Wi-Fi?

Basically I want to wire a Wheatstone bridge style load-cell into a moving trolley and transmit the data to a remote workstation so I can get real-time feedback about the loading conditions. Do I ...
1
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1answer
4k views

GPRS SIM900 and GPS NEO-6M don't work together

I'm trying to get GPS coordinates and send them to my API through the GPRS SIM900 and GPS NEO-6M shields. In setup(), I first start the GPRS shield and call the function that connects to the internet....
-2
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1answer
51 views

Why do COM port numbers between Arduino and Processing not match? [closed]

I have a Processing program that reads data sent to the serial port by an Arduino. When I go to device manager it shows that the Arduino is plugged into COM 4, however in order to get Processing to ...
0
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1answer
948 views

arduino nodejs serial data chunked and not in synch

I'm trying to get an arduino sending data to node but with no success. I'm connecting to an ar-drone 2.0 as in https://gist.github.com/maxogden/4152815 Here is my Arduino code: #include <...
0
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1answer
33 views

How to properly link an Arduino and its sensors [closed]

To finalize a prototype, I would like to have a proper structure containing the arduino (uno here), its shields and its sensors. I would like the sensors to be soldered to the arduino+shields block, ...
3
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5answers
28k views

How to have an Arduino communicate with 3 other Arduinos?

I was wondering how I can get 4 Arduinos in total to communicate with each-other through a wired connection. The goal is to have the master Arduino send a number 0-100 to each of the other Arduinos. ...
3
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2answers
2k views

Can't upload to arduino boards anymore

I have been working on several projects recently an made hundreds of uploads to several different boards. I haven't had any issues to speak of. Now I cannot upload. I have tried: Disconnect all ...
2
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1answer
1k views

Communicating with magnetic sensor - TLV493D-A1B6 over I2C

I'm using the TLV493D-A1B6 sensor connected to an Arduino Uno: I've attached all necessary documentation at the bottom. This is a 3D magnetic field position sensor that detects the magnetic field ...
2
votes
2answers
978 views

Example code and documentation on using Firmata communication in native Java

I have been trying for some time to get documentation on using Java and a Firmata client library for the communication between a PC and an Arduino. Please note I want to use Java only, i.e., not ...
0
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1answer
299 views

Serial communication between a single Android device and multiple Arduino boards [closed]

I am thinking about a project, but I will need let's say two Arduino Uno. I can see that we can just use different USB ports on a PC, but what about an Android device? I want to "run commands" from ...
0
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2answers
7k views

Arduino to ESP8266 SoftwareSerial communication

I have an Arduino Uno and an ESP8266, connected over serial through ESP8266 pin GPIO_2 (which is set as RX over espsoftwareserial) and 11 on Uno (which is set as TX over SoftwareSerial). I am trying ...
0
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1answer
1k views

AT command to put the A6 GSM/GPRS into sleep / power down

The general AT command for sleep mode (for the SIMCOM GSM modules) is AT+CSCLK=1 (or AT+CSCLK=2). I have given both a shot but they don't work with the A6 module. Does anyone know of any other command ...
-1
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1answer
84 views

How do I get LEDs to turn on according to a continuous Python input?

I'm trying to make a tuner. 3 LEDs are connected to the Arduino board, each one corresponding to one situation (too high, low or correct). Python handles the detecting of a note according to the mic ...
2
votes
1answer
132 views

Long term connection between Arduino and computer

I am looking to make indicator lights for my computer to indicate things such as system load, IO usage, et cetera, using an Arduino and NeoPixels. I would like to just plug it into my computer, and ...
2
votes
1answer
669 views

Master doesn't receive the correct values in a master/slave SPI link

I've been struggling for 3 weeks looking for a solution to my problem concerning SPI communication. So, I need to establish a SPI communication between two Arduino devices: for instance, the master ...
1
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4answers
15k views

RS485 Multimaster Communication with collision avoidance

I'd like to know if there is an easy way to implement communication between multiple arduinos that avoids collisions using the RS485 module. My setup would have multiple masters that send messages ...
-1
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1answer
128 views

Does esp8266 wifi module work as both RX and TX ? [closed]

I need to know that the module can work as both transmitter and a receiver ?because I need to send an image to my phpmyadmin and after that java application do some work and need to send a signal to ...
1
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3answers
2k views

Synchronization and Implementing hamming code on Software Serial

I want to learn and use Hamming Code. Would it be wise to alter the Software serial library to do this or just change the data being transmitted in the actual Arduino sketch? Also, for means of ...
1
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1answer
1k views

Sending data to Arduino Via Nodejs: Arduino does not echo back the data

I have the following sketch that runs in a arduino UNO: /* * Copyright 2018 Dimitrios Desyllas * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and ...
1
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1answer
182 views

Arduino - Raspberry Pi serial communication

I need to connect a Raspberry Pi and an Arduino Uno through serial communication and decided to follow this guide, which mentions the use of a voltage divider. I understand the connection to the ...
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: ...
0
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0answers
114 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/...
1
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2answers
2k views

Arduino Editor: Monitor menu show “Serial port unavailable”

Ubuntu 16.04LTS 64bit, Arduino Pro Mini board (ATmega 328P, 3.3V 8Mhz) I have problem with WEB editor: I selected Arduino Pro mini and ticked "8Mhz ATmega 328P". I tried to upload "blink" test program ...
1
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1answer
203 views

Powering Arduino through 12V USB communication unstable

When powering Arduino through Japan Jack at 12V USB communication becomes unstable and frequently interrupts/disconnects. Using Arduino Uno R3 and Linux on the connected computer. Does anyone have ...
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0answers
554 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 ...
0
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1answer
77 views

Coding Arduino's samples/period and cycles/sample configurations for input signal [closed]

Am I able to code the Arduino so that I can change cycles/sample of an input waveform and a number of samples/period configurations? I would like to modify these parameters in order to be able to ...
0
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1answer
5k views

Cannot assign COM port to HC-05 bluetooth device

I can't set a COM port to my paired BT module. For better understanding I recorded a YouTube video to make sure I show everything. Hardware: Arduino Nano knock-off by RobotDyn (atmega168) Bluetooth ...
1
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1answer
62 views

Control/Interacting with Android OS using Arduino board

I am new to arduino, and based on my search, it is possible to connect Android devices and Arduino board thru bluetooth module. But most solutions i found are either for controlling Arduino board ...
1
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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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