Questions tagged [communication]

for questions about communication between multiple devices.

Filter by
Sorted by
Tagged with
1
vote
0answers
20 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
vote
2answers
57 views

I2C Devices Interference

I am currently trying to connect 3 I2C Devices to an Arduino Mega, as detailed in the fritzing sketch. The Sensors are: Max86150 PPG Sensor on a breakout board (5v), MLX90614 IR Temperature Sensor (3....
0
votes
1answer
23 views

Arduino with bmp280 sensor not entering void loop

I've been working on a project in which I need to know my altitude. For this purpose I've been using the BMP280 sensor. But I have an issue. I've been trying to test if the sensor works with the ...
1
vote
0answers
39 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
votes
0answers
39 views

How to use an Arduino to upload a program to another Arduino without an intermediate computer, SD card or custom programmer board?

I have seen several other questions here which appear similar to this but the solutions offered don't quite match the issue I am dealing with. Problem: I am developing a portable battery-powered ...
1
vote
0answers
36 views

WiFiNINA communication via SPI on the Nano 33 IoT

I am trying to understand how the WiFiNINA Lib is working on the Nano 33 IoT device. On the mentioned board the SAMD21G is connected to the ublox wifi module via SPI and I am studying how they ...
-1
votes
1answer
41 views

How to fix “expected primary-expression before '%' token” error code? [closed]

I'm trying to use this code to get temperature and humidity values from DHT11 sensor and send it to Python and I need to write the temperature and humidity values in the same line. But I keep getting ...
2
votes
0answers
37 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. ...
0
votes
1answer
32 views

SIM7000E Waveshare can't do anything

Can someone help me? I'm using a sim7000e from Waveshare. One week ago it was working normally, but now it doesn't work at all; it even can't read the RX-TX communication. #include <SoftwareSerial....
1
vote
2answers
41 views

Can RX pin(s) be used as TX instead?

Title question. I do not need any receive communication pins, only transmission. Actually, I need as many transmission pins as possible on any Arduino besides a Mega2560 (to re/write the EEPROM of ...
0
votes
1answer
124 views

Sending 4 analog values from one arduino to another with I2C

I have modded a cheap drone controller to output its joystick values to an Arduino Nano. I made it to output its 4 pot values using I2C to another Arduino don't ask why. So my problem is that I need ...
1
vote
0answers
20 views

Communicate/Configure with Pro Micro (using Joystick.h) from within Windows

I'm creating some Joystick-like controllers to augment simulator games. I usually use the Joystick library from MHieronimus which has worked great so far. Now, I'm using some non-momentary rocking ...
0
votes
0answers
36 views

Extremely bad analog read on ESP32 while using 433MHz module

I'm currently trying to transmit data from one ESP32 to another with 433MHz modules. I also need to read some sensor readings from an Hall sensor. When the ESP32 that sends is not connected the values ...
1
vote
0answers
29 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
26 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 ...
4
votes
0answers
73 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
votes
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
votes
1answer
43 views

SD seems too slow for SMTP

I have asked this question on the arduino forum as well. I have used SMTP before using client.print (and client.println) but I am now trying to move as much text as I can from RAM to SD (and so I need ...
0
votes
0answers
23 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.
1
vote
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
votes
1answer
47 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 ...
0
votes
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
vote
2answers
103 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
votes
3answers
127 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
vote
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
votes
2answers
31 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.
1
vote
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
votes
0answers
25 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)...
1
vote
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
vote
1answer
57 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 ...
1
vote
1answer
47 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
vote
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
vote
1answer
41 views

Transmitting multiple values to the arduino, and Interpreting them with minimum delay

I am building an underwater robot, which can move Up/Down, Forward/Reverse, controlled by a Joystick. The situation is like this : USB Joystick is connected to a PC, PC is connected to an Arduino via ...
0
votes
1answer
28 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 ...
1
vote
0answers
97 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 ...
1
vote
2answers
274 views

Using HC-08 bluetooth module with arduino

I have an arduino mega 2560 and a recently purchased HC-08 module and the connection is as the following: Arduino | HC-08 VCC - VCC GND - GND 14TX3 - TXD 15TX3 - RXD When I power up the arduino it ...
0
votes
3answers
98 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
votes
1answer
117 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
vote
1answer
36 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
votes
0answers
180 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
vote
1answer
60 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
votes
0answers
303 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
votes
0answers
40 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 ...
2
votes
2answers
208 views

Sending minimal data between two Arduinos far away from each other

Problem: I need to send small integer numbers (single-digit numbers suffices) between two arduinos located approximately 50-60m away from each other. The connection must be made through cables. I have ...
1
vote
2answers
245 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 ...
2
votes
2answers
77 views

Arduino Yun receives UDP packets but prints them with gibberish

Arduino Yun is set to receive UDP packets. It receives those data with some gibberish. How is all set up: Arduino Yun (acts as a server) is connected through Ethernet to a PC which is (through WiFi) ...
0
votes
2answers
142 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
votes
0answers
60 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
votes
1answer
87 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
vote
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
2 3 4 5
9