Questions tagged [communication]

for questions about communication between multiple devices.

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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 ...
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22 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 ...
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1answer
33 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. ...
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1answer
88 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 ...
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0answers
29 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 ...
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1answer
27 views

HID communication between Arduino Uno and computer

I used some firmware I found online to turn the UNO into an emulated HID device. The Arduino is no longer connected to a Serial COM port so I can't send serial data from my computer to the device. Is ...
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0answers
27 views

Is there possible implement websocket using AT Command?

For example I have a sim800l module to communicate to a server using websocket (socket.io) but that module allows AT Command to operate. I have successfully made an HTTP request, but I don't know how ...
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1answer
17 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 ...
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1answer
75 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 ...
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1answer
58 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-...
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0answers
104 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 ...
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2answers
214 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. ...
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44 views

Flow control between ESP32 and RS323 device

I'm trying to communicate an RS232 device with an ESP32 (Heltec Wifi/LoRa 32 v2) my problem is that I don't receive any response from the device, doing some research, I'm thinking that the trouble can ...
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1answer
64 views

How to display CAN BUS information on EPS32 web server?

I try to display the transmitted information from CAN bus on ESP32 web server. I saved the CAN.read() in a buffer receivedChars[i] and try to display the data by client.println(receivedChars[i]);}. ...
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16 views

Virtual terminal for my Proteus 8 professional is unable to read the correct value of the data i entered

I am trying to develop proteus simulation for remote-controlled robotic car using two Bluetooth modules one attached with the robot and the other used as a controller remotely. the two Bluetooth ...
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64 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 ...
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1answer
36 views

How do i send data from a Master to another Master?

I am using an ESP32 to receive data from web. However in an I2C communication, the EPS32 does not work as a Slave and i already have an Atmega as the Master. i have seen sites saying Master-Master ...
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1answer
82 views

half duplex for Atmel SAMD21

I'm using Arduino MKR GSM 1400. I know this board uses Atmel SAMD21 and SAMD21 support half duplex (USART with full-duplex and single-wire half-duplex configuration). My question is, How Can I ...
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1answer
195 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 ...
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0answers
31 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
390 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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42 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
138 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
97 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
432 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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233 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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0answers
21 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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49 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
53 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
125 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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48 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
40 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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191 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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61 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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198 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
122 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
87 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
51 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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0answers
37 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
190 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
76 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
62 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
160 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
434 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
102 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
177 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
510 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
122 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
94 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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