Questions tagged [communication]

for questions about communication between multiple devices.

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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 ...
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27 views

RS485 Communication between arduino uno to arduino uno to

currently i working with rs485 communication protocol . Communicating with two arduino uno boards using RS485 module. Followed the code from arduino forum . Everybody says codes working well but ...
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31 views

Socket communication between Pi and Arduino [closed]

I'm a beginner with Raspi and Sockets and I would appreciate your advice and input on a project I'm working on. Hardware: Raspi 3B+ with latest Rasbian, Arduino MKR 1000 I have a bunch of sensors ...
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14 views

How can a python script and Arduino communicate using Xbee radio modules?

So I have to run a python script that detects some colors through an overhead webcam, and then I have to send this data to Arduino through Xbee but the catch is I am only allowed to do embedded ...
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1answer
26 views

Connecting an Arduino Nano to a Raspberry Pi Zero

I'm working with an Arduino Nano Every, and I'm trying to connect it to the Raspberry Pi Zero for data collection from I2C sensors and writing/program code from the Pi to the Arduino. Typically, I ...
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16 views

Dragino Lora shield for Arduino sensor use

I am new to arduino and lora technology and i have dragino lorashield for arduino Uno and dragino gateway. I have also MQ-3 gas sensor and I want to detect the alcohol value and to send it to the ...
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0answers
73 views

why is memcpy of unsigned long killing my sampling speed?

I'm using a Mega 2560 to communicate with a mixture of analog (i.e. measured via analogRead()) and I2C based sensors. Sampled data is placed in a 16 byte array, then written to an SD card once a 512 ...
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2answers
36 views

Can I send data from one MKR1000 to another MKR1000

I want to simply send data from one MKR1000 to the other over wifi, both are connected to the same network, but sending the data is where I get stuck, I've looked through tuts everywhere but can't ...
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1answer
54 views

Using usb port to communicate with standalone atmega328p circuit

noob here So I managed to get my circuit to be a standalone circuit (as pictured below). I want to use this circuit as an input to a game on my computer. What I want to know is could this micro-usb ...
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74 views

Bad Data : Arduino Mega & NodeMCU Serial Communication

Currently I am working on an Arduino project. The project required to establish communication between Arduino Mega and NodeMCU ESP8266. Here are some details about the project: NodeMCU Rx Pin is ...
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14 views

Can the PN532 pull MAC address from Felica tags?

I'm trying to do an automatic pairing with Felica NFC tags but I need the MAC address because there is a certain order I would like sync up my device in order when I scan it to the NFC. To get it to ...
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36 views

RS232 to ttl communication of arduino

I have an rs232 to TTL converter and I want to read something in the Arduino serial monitor by using the converter instead of using Arduino serial cable. I have connected the correct wiring in my ...
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2answers
42 views

Serial Commmunication between two arduino

I want to send the voltage magnitude received on an analog pin of atmega328Pu to another arduino uno using Serial communication pins TX and RX and display the value on the receiver arduino's Serial ...
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1answer
97 views

Can you connect BH1790GLC and TMP117 sensors to an Arduino board?

I would like to use those two components for an upcoming project : BH1790GLC heart rate sensor TMP117 temperature sensor I especially like the fact that they’re so tiny. Could I connect them ...
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31 views

Reconnect to a com port

I want my Arduino to log data while connected to a battery. After few hours, I need to reconnect the Arduino via COM port to a PC and read the logged data. The com port will not reconnect. This is ...
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1answer
33 views

Can an arduino Uno control led, sound and smoke?

I'm pretty new to this and I've not seen anyone answer this question yet - so I figured I would ask. I have a vape mod that is set up to expel smoke with a trigger. I want to merge this trigger to ...
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115 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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54 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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99 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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0answers
84 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
45 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
45 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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34 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
96 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 communicates with a LED driver chip using three wires (STB,CLK,DIN). (LED driver controls 16 ...
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1answer
52 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
45 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
84 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
207 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
63 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
73 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
293 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
85 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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0answers
63 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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108 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
42 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
516 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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28 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
61 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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0answers
108 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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0answers
21 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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51 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
73 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
260 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
77 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
46 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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0answers
172 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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0answers
27 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
138 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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0answers
48 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-...