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Questions tagged [communication]

for questions about communication between multiple devices.

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21 views

Why does SIM respond to AT+CIPSEND with “+CME ERROR: operation not allowed” when the IP address and the TCP connection has been established?

I am working with a team to send data from Raspberry Pi over 2G network to a server using a GSM module called “SIM800L EBV”. We encountered an AT+CIPSEND error that has only occurred in Zambia, Africa ...
0
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1answer
19 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,...
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0answers
27 views

NRF24L01 code hangs at `radio.write();`

I am trying to send a constant integer value (222) from one Arduino Uno to another through NRF24L01 modules and print the received value on the serial monitor. The receiver code: #include <SPI.h&...
0
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0answers
35 views

First byte of SPI transfer not sent

I had asked about this in another thread but it was after finding the answer to the original question and it all got a bit messy and confusing. send more than one byte at a time SPI Arduino Anyway, ...
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2answers
64 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
123 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
22 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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0answers
18 views

Use Arduino to send signals to controller for motor acceleration

I'm thinking about possibility to assemble mini pc, Arduino and this controller with this motor. I'm trying to understand if it possible that mini pc collect data from external source of user and ...
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2answers
41 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
37 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
222 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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1answer
34 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 ...
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0answers
19 views

TM1637 is showing error [duplicate]

When I try to use the 4-digit display TM1637 with the relevant library on an arduino UNO board this error message keeps popping up.Please help me trouble shoot what is wrong with this device ? the ...
0
votes
1answer
27 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, ...
0
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0answers
24 views

Hooking 1 serial tx to 5 arduinos rx

I have 6 arduino, arduino#1 should send data via serial to all 5 arduinos. Can i just connect the tx from arduino #1 to resistor in series and then connect the other end of the resistor to all the 5 ...
3
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2answers
167 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 ...
0
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0answers
100 views

Arduino and RS485 comminucation

I want my arduino to communicate with a rishabh delta energy meter - http://rishabh.co.in/uploads/product/Delta_Energy_Manual.pdf I used the Max485 module for arduino and connected it as follows: A(...
2
votes
1answer
253 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
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1answer
49 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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0answers
134 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. ...
1
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1answer
33 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
50 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
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1answer
183 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
71 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
177 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 ...
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0answers
81 views

Camera VC0706 No camera found?

I have followed steps of this tutorial https://www.elecfreaks.com/7861.html But the problem No camera found? #include camera_VC0706.h #include SD.h #include SoftwareSerial.h #define chipSelect 10 ...
0
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1answer
43 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
48 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
31 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
200 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 ...
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0answers
396 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: ...
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0answers
41 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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1answer
74 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
65 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
177 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
25 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
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1answer
41 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 ...
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0answers
30 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
26 views

Cannot communicate XBee with Arduino

I'm a newbie using XBee. I try to communicate 2 XBee S2 using XCTU and there are works. Here is my configuration Coordinator : XB24-ZB ID : 33 SH : 13A200 SL : 40CC0408 DH : 13A200 DL : 40B79F40 NB : ...
2
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2answers
4k 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 ...
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2answers
71 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 ...
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0answers
2k views

GET command with GPRS GSM A6 and arduino

I'm trying to get data from a text file(read.txt) in server by sending a HTTP GET request via AT commands for the GPRS GSM. Here is my code: void setup() { Serial.begin(115200); delay(...
5
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2answers
582 views

Is the arduino hackable when using communication shields?

Let's say I have an arduino Uno connected to a W5100 ethernet shield. The arduino communicates with the ethernet shield using the tx0 and rx0 pins. When I upload a new script to the arduino using USB, ...
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0answers
91 views

Arduino GPRS module is not connecting to the network

This is the GPRS module my group has (https://seeeddoc.github.io/GPRS_Shield_V2.0/) . We are currently trying to just send a simple text message through an arduino uno as a proof of concept then we ...
0
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1answer
214 views

Missing character when introducing delay in the code

I am using the following code for reading any incoming message, and doing something after decoding the incoming string. There is a delay of 10sec in the code. When this delay is not introduced in the ...
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2answers
56 views

Where can I find the complete list of Arduino Serial Command & Query Strings?

I am planning to use the Arduino as a replacement for a USB-Controlled Digital I/O device, which will be integrated into an existing C++ software package that I created. I understand that the Arduino ...
0
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0answers
4k views

Arduino mega to Arduino mega commuction with RS485

I trying to communicate two Arduino mega's using RS485. Am able transmit thought the serial channel but another end is not receiving.I have used the below diagram as reference to circuit The Code ...
0
votes
1answer
56 views

Commucinate two arduino with each other

I have 2 arduino Unos where each one works properly on its own. I try to make them communicate with each other using serial communication (TX-RX ports). When I try to upload my code to them I get ...
0
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0answers
1k views

Communication between Arduino Uno and Wemos D1 mini using I2C not working

I2C communication between 2 arduinos works just fine on pins A4(SDA) and A5(SCL): Sender #include <Wire.h> void setup() { Wire.begin(); } byte x = 0; void loop() { Wire....
1
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1answer
205 views

Send an multidimensional array of values from one arduino to another through serial port

I have connected two arduinos using pins: RX and TX and managed to send a string as an array of values: //sender char mystr[6] = "hello"; void setup() { Serial.begin(9600); } void loop() { ...