Questions tagged [communication]

for questions about communication between multiple devices.

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W5500 with Arduino connect to EGX100 gateway [on hold]

I try to communicate W5500 Ethernet module and Schnider Electric EGX100 gateway. When these two connect each other, communication bulb also not blinking. EGX150 user manual I tied W5500 communicate ...
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20 views

ATMega32U4 Not Connencted to My Laptop

I make my own board with ATMega32U4 with the brand new chip in it. But, after soldering it and powering it with USB connector noting happened on my laptop. Not a single new COM PORT is available. I ...
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23 views

Ethernet TCP communication between two arduinos not working

So I've got two arduinos Leonardo ETH, both plugged into a local network I host on my computer, and I'm trying to make them communicate through ethernet. One of my arduinos is collecting data from 2 ...
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51 views

Communication between 2 arduino's one at 6th floor and the other at the basement

Communication between 2 Arduino's one at 6th floor and the other at the basement. I tried with nodemcu , but the signal is not reaching the basement. From 6th floor. Which is the best way to connect?...
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15 views

Printing inputs in Serial Monitor from Two Different Transmitters [duplicate]

I'm using 3 NRF24L01 transceivers, each attached to its own Arduino Nano. Two of those transceivers are set as transmitters while the third is set as a receiver, and is connected to the computer via ...
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37 views

Sending Simultaneous Data from 2 NRF24L01 Transmitters to 1 NRF24L01 Receiver

I'm using three NRF24L01 transceivers, each connected to one Arduino Nano. One of the NRF24L01's is configured as a receiver, while the other two NRF24L01's are set as transmitters. Firstly, I'm aware ...
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68 views

SPI receive register size of ESP32

ESP32 has 64 byte SPI FIFO size, but I could not find what is the largest bit size it can receive over SPI? P.S. I need to interface a sensor, which returns 32 bit response. EDIT to clarify why I am ...
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1answer
22 views

Use Arduino as transmitter and receiver UART

I know UART and serial communication model and data frame. But I want to ask about something else, when I searched in internet just found examples of one Arduino as (receiver) and another Arduino as (...
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1answer
43 views

Arduino detect order of objects

I'm trying to find a way to detect blocks being placed on grid on a table. The table will have fixed places where you can place the blocks, but the user is allowed to place the blocks in any free slot....
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33 views

Multiple arduino connections problem

I have 2 Arduino Mega 2560 connected via USB to my Ubuntu 18.04 machine. When I boot, one connects to /dev/ttyACM0 and the other connects to /dev/ttyACM1. Communication works perfectly. However, ...
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1answer
30 views

how to read shiftOut function using arduino

(I"m sorry for my bad English,but i will do my best) I have a Chinese MUC which already programmed,it communicate with a LED driver chip using three wires (STB,CLK,DIN). (LED driver controls 16 ...
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1answer
38 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 ...
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1answer
32 views

Getting issues while using SoftwareSerial

I am trying to read string send from esp8266 esp01 to Arduino mega. When I use normal Rx and Tx ports, it works properly but when i am initializing new serial port using SoftwareSerial then nothing is ...
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1answer
44 views

Sending multiple byte data from Arduino as Slave on SPI

I have been working around the teardown of an induction cooktop and thought of having a tweak in the system. So far, I have deduced following circuitry out of the cooktop- There are two devices ...
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1answer
58 views

Arduino communication protocol with python - beyond pyserial and Arduino example

TL;DR does someone know of a advance and reliable/redudent USB protocol for communicating between a raspberry pi and Arduino due (native port) I am trying to learn how to build a little robot which I ...
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1answer
44 views

Why is the IDE not able to find the board despite it being clearly seen and selected?

i'm having an odd problem where despite having the correct port selected 3 times i'm still getting an error as shown below: message: Arduino: 1.8.9 (Windows 10), Board: "Adafruit Feather M0, ...
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2answers
35 views

Parsing Arduino Receiving Strings

I'm currently using google geolocation to get location data to one nodemcu and sending it through serial to another Arduino. The serial command I'm getting right now is, 1.450187T103.824745 I'm ...
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2answers
120 views

How to automatically reset the NRF24L01 module

For my home-automation project I'm using several arduino nano's with each a NRF24L01+ module. Each module is able to both receive and transmit with one another. Everything seemed to be flawless for a ...
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1answer
43 views

Increasing speed of Vl6180x Sensors

I have 5x vl6180x pololu ToF sensors. I have managed to hook up all of the sensors to the arduino via I2C by making each sensor startup at different times and when they do, changing their addresses, ...
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48 views

Creating PPM signal from 4 integrers

I am currently building a MultiWii based drone, I have built the emisor-receptor that interface 4 analog signals(4 potentiometers to control the drone) and it works perfect, the receiver(arduino Nano, ...
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56 views

Can't connect my ESP-12F to WiFi with my Arduino Uno

Recently I bought this wifi adapter for my IOT projects that I connected to my arduino uno that seems to not working. I have tried with the arduino ESP8266WiFi library with RX connected to pin 0 and ...
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1answer
32 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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1answer
173 views

Cannot connect through /dev/ttyACM0 (Ubuntu 18.04)

I am using an Arduino UNO which worked fine until today. My system: Ubuntu 18.04 Now, the IDE can no longer connect to it: Cannot do any sketch upload Cannot ask for board info No USB ports shown in ...
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25 views

Exchange data between Arduino and a remote server

I want to read name and user code stored in a magnetic card by using my arduino and then send this information to a remote server. The server runs an application which is able to control if the user ...
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2answers
54 views

One Arduino collects data, several other Arduinos use the data. What is a simple way to do this?

I am looking for a way to exchange a few bytes of data from one Arduino to two or more additional Arduinos. It's a one way communication and speed is not a problem. 10Hz is fast enough. Data ...
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63 views

Can't use MEGA as Transmitter and UNO as Receiver nRF24L01

I have a project with 7 May Deadline, i really need help on this. Here is the problem, I need to use my Arduino MEGA 2560 as transmitter and Ardino UNO(CH340G) as receiver. I can use uno as ...
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20 views

Arduino Swarm - WiFi and Embedded Communication

I'm developing an Arduino-based swarm, each bot having 1 ATMEGA2560 as its main processor and 1-2 ATMEGA328 as sub-processors and a variety of sensors and actuators, with WiFi (LAN) connection in a ...
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31 views

Sim800l MMS with Free

Using sim800l evb connected to pi zero w under Python. Sending sms function correctly. I try to send mms does not function. cmmscurl : mms.free.fr cmmsproto: 212.27.40.225 80 sapbr 3,1 apn: mmsfree ...
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1answer
49 views

Connecting (SD or HD) TV screen to Arduino

I had a thought about making myself an arcade cabinet. I found a nice cheap and sturdy 8 directional arcade joystick online, and now I'm thinking about the possible ways of displaying graphics. I ...
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1answer
125 views

Send big amouts of data to PHP script via gsm module SIM800L

I'm looking for a way to get lots of sensory data from my Arduino Micro to a PHP script. My current attempt is using the following AT-commands: Sent: [AT+HTTPPARA=URL,www.example.com/newData.php?data=...
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1answer
53 views

Wanted to control 2 servos with serial read [closed]

I want to use 2nd servo only when 1st is in up state by asking user whether he wants to fire or not.(code in bold is not working ) #include <Servo.h> Servo myservo; Servo trigervo; ...
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2answers
44 views

Ensure board is always on the same port?

I want to make a VB.NET program to communicate over serial with the board, but I need to be sure it knows which port. Instead of programming in more advanced methods of verification, for this project ...
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104 views

Ultra Long Range (200-500km) Arduino Communication using a Gibson Girl

I came across this article on Hackaday showing a simple AM transmitter sending a morse code tone 700km! I'm looking into a EPIRB for myself while deep in the bush / outback hunting or camping, just ...
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23 views

Serial Communication between ESP-01 and arduino [duplicate]

I want to send sensor data from arduino to esp-01 and it further goes to firebase. And also wanted to send status of water pump from firebase back to the arduino to control motor manually. So what pin ...
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1answer
76 views

Serial.parseInt() takes longer time than desired

My whole code for master. Please head to void read() where I've used parseInt() #include <nRF24L01.h> #include <printf.h> #include <RF24.h> #include <RF24_config.h> #...
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39 views

SIM800L save message to draft in sim memory

I want to save some data in sim memory as draft message and later read it. I am Using Arduino DUE and SIM800L Basically my main target is to keep in check the total uptime(approximate, error of upto 2-...
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1answer
44 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
92 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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59 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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61 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
2k 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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70 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 ...
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1answer
44 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
117 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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51 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
55 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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25 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
36 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 ...
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2answers
95 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 ...
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1answer
293 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 ...