Questions tagged [communication]

for questions about communication between multiple devices.

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79 views

What’s the most stable digital communication protocol for sewable electronics?

I’ve spent the past few days trying researching communication protocols and I have a few issues. With sewable electronics, you need to work with cables with a fairly high resistance that are ...
2
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1answer
46 views

Communicate from Arudino to computer over 3.5mm port

I'm wondering if it would be somehow possibly to have easy communication with a computer for Arduinos that don't have USB like the pro mini. That would make an easy way of having two-way communication ...
0
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2answers
150 views

Communication between 2 arduino boards

I am not really 100% too sure how to do this but I am trying to make my arduino UNO communicate with my arduino MEGA. The reason why I needed to do this was because I was using the RFID module along ...
0
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0answers
24 views

Make Arduino Nano 33 IOT talk to another Arduino via Bluetooth

I have an Arduino Nano 33 IOT and I want it to talk to another Arduino that has an HC-05 Bluetooth module. Is this possible? I cannot find anything on the internet that talks about doing this.
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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 ...
2
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2answers
13k 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 ...
0
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1answer
32 views

I want to make two arduino to communicate over different wifi. Is that possible?

I want to make any 2 Arduino module from different places to communicate over wifi. I really need to know if it possible? If yes, advice me more about it. I want send data from sensor module from one ...
1
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2answers
113 views

Read Internal Registers of RS485

I am trying to interface sele EM2M, I am using Arduino Mega with RS 485 module. I want to read the internal registers I am using ModbusMaster library. The data which I want to receive is in the ...
3
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3answers
128 views

Using several Arduinos simultaneously

I'm working on a project where I need to control the light of 5 buttons as well as listen when each button is switched on/off by the user. I would furthermore like to provide feedback on an OLED ...
1
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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 ...
0
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2answers
33 views

Can I use The mpu6050 with this?

I am making a project with 3 arduinos (2 slave, 1 master) and I want to know can I use the mpu6050 since it uses the I2c communication.
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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 ...
0
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0answers
35 views

Arduino Due SerialUSB Resetting

Having this basic example for using the SerialUSB function on the Arduino Due under Windows: // ARDUINO DUE BLINK LED void setup(){ pinMode(13,OUTPUT); SerialUSB.begin(2000000); while(!SerialUSB)...
0
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1answer
106 views

How can I display text on OLED?

I'm trying to print the information, which is received from the other ESP32 by CAN transceiver, on an OLED. The CAN bus is working perfectly, as the 'HELLO WORLD' is already be received. But I can't ...
1
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1answer
66 views

Simple ModBus Master function 15

I have a simple setup with arduino Nano as slave and a arduino Mega as master Can anyone explain how the function 15 FORCE_MULTIPLE_COILS Works i have been running some test on this and cant figure ...
0
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2answers
2k views

Arduino reads hc-05 device connecting status

Hello I want to get an arduino get status of bluetooth hc 05 if connect with device or not . I'm trying by myself and search on internet website but I can't find useful things.
1
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1answer
50 views

My two slave SPI setup on arduino not working correctly

I am trying to connect a DPS310 and an ADXL345 to my Arduino using 4 wire SPI. When the individually tested (i.e. each has its own script), the output is correct, however when the scripts are combined ...
1
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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 ...
1
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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 ...
1
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0answers
101 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 ...
0
votes
1answer
29 views

parallel communication simulation problem

Hi I am trying to send data(1 byte) from one arduino to another using parallel communication(a bus of 8 connections) and not using any library. However, the problem is the data gets corrupt all the ...
2
votes
1answer
627 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 ...
0
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2answers
126 views

Can I program the Arduino without having an actual board with the able to emulate a COM connection to the computer?

I have ordered my Arduino, but it is not going to arrive until 2 months, and I would like to be able to emulate a COM connection to the emulated Arduino. I am writing a program that listens on the com ...
1
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2answers
941 views

Making two Arduinos/MKR1000 communicate

I am trying to create a project in my free time just for a bit of fun - it consists of two MKR1000 (one acting as a web server connected to one laptop, and the other acting as a web client connected ...
0
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3answers
152 views

What's the most direct way to assign Serial.read() bytes to an array?

I'm trying to send NMEA 0183 sentences through LoRa. Every dinstict NMEA message looks like several char arrays (sentences) followed by '\n'. In the below picture we see one NMEA distinct message: ...
-1
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1answer
157 views

Sending data struct with 2 int fields from Arduino to Raspberry via NRF24L01

I'm trying to do wireless thermometer on max31865 arduino and nrf24l01 but I'm having problem sending whole data struct I can send int or char arrays but when I try to send whole struct I got output ...
1
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1answer
42 views

Why do NRF24L01 modules only communicate in 1 direction

I have 2 NRF24L01 +pa +lna modules connected to 2 arduino mini pros. One of the modules is on a joystick and the other one is on a airplane. Everything worked perfectly until last week when they ...
0
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0answers
205 views

BLE comunication between two ESP32s

how can i send data from one ESP32 to another with BLE? I was trying library from nkolban, but i didn't know how exactly should i write the code. All I want is to send a string with 5 characters. ...
1
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1answer
67 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 ...
0
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0answers
411 views

TCP client readStringUntil only when data exists

I have the attached script that reads data from a socket server (it is PHP at the server end). My problem (I think) is that the readStringUntil() needs a test above it, so that it "reads up to \r&...
0
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0answers
41 views

2xArduinos, 2xDevices, I2C setup

Is it valid configuration using hardware I2C pins: Especially: can NanoEvery initialize communication with DS2482, while it is slave for Mega2560? Using Wire library or should I use software I2C when ...
1
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2answers
330 views

How to convert Unicode char to “Unicode HEX Position” in Arduino

How to convert Unicode char to "Unicode HEX Position" in Arduino or C i will share a picture here : for example in JavaScript you can do that with charCodeAt(); ! this function will return ...
0
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2answers
1k views

Binary to decimal using bitwise operators

I am trying to convert some binary data to decimal numbers. I succeeded to convert binary to hex, but now I want to do the same with binary to decimal. I want to use bitwise operators and NO array. ...
0
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0answers
73 views

Transmit datastring using SIM7600 4G hat

I've been using Adafruit Fona with SIM800 chip to transmit data through the phoneline. SIM800 is a 2G chip but this network is closed in Norway so now I bought a Waveshare SIM7600 hat for Arduino ...
0
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3answers
3k 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 ...
-1
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1answer
35 views

Problem communicating with GSM module which is a Fona 3G from adafruit

My issue is fairly simple to describe but I have no idea what the problem could be. So I got my FONA 3G and immediately after taking it out of the box, I connected the battery and I wired up my FTDI ...
1
vote
1answer
112 views

Master Reader/Slave Sender with Distance Sensor

I am currently working on a project and want to transmit the information from a distance sensor from one arduino the another, but what i receive in the master board are not the correct measurements. ...
1
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1answer
1k views

Arduino AES encryption, working example or tutorial

I am quite new to idea of encryption and am trying to use aes-256-ecb encryption. I am using library called "Arduino cryptography". Unfortunately I could not find any tutorial that would explain how ...
1
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2answers
25k views

Serial Communication between ESP8266 and Arduino Uno

I want to send data from arduino to ESP8266. I have done all the RX and TX connections. The problem is that data is not sent every second, it stops after a single byte. When I remove the arduino cable ...
1
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0answers
41 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 ...
1
vote
1answer
985 views

How do I send tweets with flame sensor and ESP8266?

I want to send tweets with flame sensor and ESP8266. My flame sensor is digital. I think everything is good but it doesn't send. This is my code: #define ag_ismi "SSID" #define ag_sifresi "PASSWORD" ...
-1
votes
1answer
121 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 ...
0
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1answer
127 views

Convert Arduino MEGA Code to Arduino DUE Code?

I've been working with MEGA before. This code works completely with MEGA. I'm still at beginner level in Arduino. Q: How do I adapt this code to DUE? Note: I'm asking this question because I think ...
1
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4answers
5k views

ToF Laser Sensor (VL53L0X) not working

I have this time of flight laser distance sensor: http://www.dx.com/de/p/cjmcu-vl53l0x-tof-laser-distance-measuring-sensor-module-purple-449081#.WSbn52jyi70 The example code of the VL53L0X-arduino ...
-1
votes
1answer
323 views

How to know physical address of XBee?

I have a system with a server (a personal computer with an XBee Dongle plugged in, running a Java program) and some Boe-Bots with XBees attached and Arduino programs. I know how to get the Boe-Bots to ...
0
votes
1answer
100 views

Problem sending strings to another ESP

I am having some problems with retrieving data from another esp. I have two esp8266, one is the access point which has a nextion lcd hooked up to it. The access point reads button presses from the lcd ...
-1
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1answer
62 views

NodeMCU Server side cannot send things to client side - multiple clients attached

I technically need your help, when I am working on my project, I found out that my server-side cannot send data to the client-side, my server-side is made with WiFiServer(80) so it is when my client-...
1
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0answers
538 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 ...
-1
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1answer
527 views

Parallel communication between multiple Arduino

Here's a post which explained the communication standard. I need to establish communication between multiple Arduino nano board. I have used SPI bus on one of the Arduino board for wireless ...
-1
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1answer
100 views

WiFi or Bluetooth to communicate between several Arduinos and a Raspberry Pi

So I want to set up a network of outdoor sensors (temperature and humidity) connected to an Arduino (and at some point a second or third Arduino further away with its own sensors). Then I'd like this ...

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