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Questions tagged [communication]

for questions about communication between multiple devices.

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0answers
21 views

How do I develop an android app that takes fingerprint data for Arduino? [on hold]

I want to develop an android app that accepts fingerprint data and use that same data to run a program for authentication. I'm stuck because I don't know how to start, help- links, lessons and ...
0
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0answers
25 views

Arduino communication by LCD and Keypad

My project is Arduino based. I connect the RX of the first arduino to the TX of the second and vice versa. I want to read the key which is being pressed (two digits) and send these two digits to ...
0
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1answer
21 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 ...
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2answers
61 views

nRF24L01 - leaves out end characters during transmission

This is my Master's code. #include <nRF24L01.h> #include <RF24.h> #include <RF24_config.h> #include <SPI.h> RF24 radio(7, 8); const byte address[6] = "00001"; char text[20] =...
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0answers
17 views

Adafruit Feather nRF52832 as a SPI slave

Like the title says, I am trying to configure the Adafruit Feather nRF52 as a SPI slave, who will receive information from a MSP430 microcontroller. I have found a few code examples that provide ...
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0answers
37 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
80 views

Arduino master/slave communication using RS485

I am using Arduino Uno as a Master Device and 3 Arduino Unos as slave devices. I am sending data from each slave to master after every 3 seconds continuously, and is going to execute further logic ...
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1answer
21 views

What are the specifications for a shield to send a SMS over the 3G network in Canada?

I am currently trying to get a project done that needs the Arduino to send a message when grain is heating in a bin. My plan is to have the Arduino collect the information from temperature sensors and ...
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0answers
31 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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1answer
40 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 ...
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2answers
76 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
35 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
31 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 ...
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0answers
16 views

Teensy 2.0 “device descriptor failed” with I²C sck+sda cable connected

I'm currently making a split keyboard, using a Teensy 2.0. I decided to make my two halves communicate over I²C, connected through a 4-cable audio cable. For that I got the following jacks: I used ...
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0answers
25 views

Making a ATMega328P-PU and computer communicate but not by standard serial communication

So i have been trying to make a ATMega328P-PU using the Arduino bootloader and a computer communicate the same way brands like Logitech and Razer makes their mouse's and keyboard's communicate with ...
0
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2answers
65 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 ...
0
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1answer
73 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 ...
0
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2answers
92 views

Serial Communication between 2 Arduinos for analogRead value

I have an optical sensor connected to A0 on Arduino #1 (Nano) giving me values from 200 to 1010. I need to receive these values in Arduino #2 (Nano) through serial communication. I have used a simple ...
0
votes
1answer
20 views

Arduino Comms disrupted, prevents program loading (catch 22)

I have written some software which, when loaded onto an Arduino Micro, blocks communications for some reason. Lets stipulate that there is something wrong with it. Using the Ardiono IDE on Windows 10,...
0
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2answers
324 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
392 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
51 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 ...
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2answers
55 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 ...
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1answer
70 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. ...
0
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2answers
609 views

How to automatically reset the nrf24l01+ with code?

I have two separate nrf24l01+ connected to two different Arduino UNOs, one as TX and the other as RX. The problem is the connection stops after a while between them. On the Arduino COM screen I have ...
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votes
1answer
41 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
votes
1answer
28 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
votes
2answers
354 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
votes
1answer
480 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 ...
0
votes
1answer
88 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 ...
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0answers
259 views

Arduino Uno WiFi - Not listing network port

I have Arduino Uno WiFi board, and it's listed as wifi network (Arduino-Uno-WiFi-cc7701), and I have board listed "Arduino Uno WiFi", and same board listed on serial port, but there's no network port. ...
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1answer
38 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
votes
1answer
54 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 ...
0
votes
1answer
409 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 <...
2
votes
1answer
80 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 ...
0
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2answers
244 views

Share I2C pins with other device when lacking GPIOs

We're Using ESP12E as our MCU and we have three functionality : SIM800 connected to TX(GPIO1), RX(GPIO3) Matrix Keypad connected to GPIOs: 14,13,2,10,0,4,5,16 GLCD connected to GPIOs: 15,12 And we ...
0
votes
1answer
49 views

Cannot connect Mega to COM 9 but okay with other COM ports

I previously had issue updating code to Arduino Mega (clone). This is a continuation of this issue, but I think it should be made as separate thread. After some time spending with it. Turns out if I ...
-1
votes
1answer
67 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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0answers
36 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 ...
1
vote
1answer
404 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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0answers
624 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
51 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
vote
1answer
97 views

Use ATtiny85 to perform initial config on a Cisco router using its USB console port

We have 200+ brand new Cisco routers that have USB console ports (but not the old RJ45 serial console ports). This is quite frustrating because the routers didn't ship with console cables and Cisco ...
0
votes
1answer
83 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 ...
0
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0answers
275 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
30 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 ...
1
vote
1answer
43 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
32 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 ...
2
votes
2answers
8k views

Arduino ModBus RTU master communication with Power Meter problem

i have an arduino UNO with RS485 module. I have made this connection: And i have an problem with communication of this module with power meter "InePro PRO-1Mod" (datasheet) over ModBus protocol. I ...
1
vote
2answers
87 views

Sending over a number from Arduino to Attiny85 [closed]

I recently started my first arduino project, displaying a number on a 4x 7 segment display. I want to keep this code and use the display in other projects to display 4 digit numbers (creating a ...