Questions tagged [communication]

Regarding communication between a Raspberry Pi and another device. Communication that is not specific to any particular medium.

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7
votes
6answers
14k views

Direct two-way communication between a PC Application and a Pi Application

I work for a medical company and we produce systems which typically are composed by a data-acquisition device connected via USB to a PC where some desktop application runs so that it can control the ...
7
votes
3answers
22k views

How to communicate between Raspberry Pis using WiFi?

How do I communicate between 2 Raspberry Pis with WiFi dongles? I have connected the 2 WiFi dongles to the router but I do not know the next step of how to get them to communicate. For in this case I'...
6
votes
4answers
8k views

How do I connect my raspberry pi to a landline phone to process calls?

I am working on a project and would like to connect an old fashioned landline phone to a raspberry pi. I then want to be able to dial some number on the phone and then have the raspberry pi play a ...
6
votes
2answers
15k views

Sending Commands from PC to Raspberry Pi via USB

I am currently doing a project with the Raspberry Pi as a controller connected to a PC via USB and using the Pi to send commands to other devices connected via GPIO pins. Simplified version: ...
6
votes
1answer
7k views

Raspberry Pi as slave

I am using a Pi compute module and wish to make two of them to communicate to each other. I have hooked up some slave I2C devices to it (RTC, Temperature sensor). So I don't think making Pi as slave ...
6
votes
1answer
3k views

Pi to Pi Communication over GPIO / USB

I have a Pi Zero that I would like to use to communicate with a B+. In theory I can connect an adaptor cable and a WiFi or Ethernet USB dongle to the Zero, and do the same on the B+. However, as an ...
5
votes
2answers
969 views

Cheap COTS transceivers that work with Raspberry Pi?

I'm looking for a way to get an app running on a laptop to communicate with an app running on a Raspberry Pi. This is a home/hobby project, so looking for inexpensive COTS hardware and open source ...
5
votes
1answer
2k views

Simple Custom 1-Wire GPIO Communication Protocol between Master PI and Slave PI

I have 2 Raspberry Pis in my system. One can be 'docked' to the other one and some time later it can become 'undocked'. While docked, the 2 Pis will have a connection between 2 GPIO pins ( 1 pin on ...
3
votes
2answers
8k views

RFID system that integrates with Raspberry Pi Model B?

I am designing a hobby project where I need a small device (powered by RPi that is running an app over linux) to be able to detect when it is within, say, 2 feet of another object. I think this is a ...
3
votes
1answer
1k views

Connecting Pi to laptop (macbook)

Brief Question: I am working on a project that requires me to execute a C++ program on my laptop, and, the result of the program will determine the actions of the Raspberry Pi, which is triggered ...
3
votes
2answers
6k views

How to send and read a string from Raspberry pi to Arduino via serial interface?

I was trying to send and receive data between Raspberry pi and Arduino UNO. I'm able to send and receive a string from Arduino to Pi using Serial.println. I spent hours searching a better tutorial or ...
3
votes
2answers
2k views

Raspberry Pi and serial only working one shot

I am using a USB-to-serial adapter to let the Raspberry Pi talk with some motor controller through the serial bus. I made the following Python script: #!/usr/bin/ipython import serial import time ...
3
votes
2answers
792 views

Best way of communication for embedded RPi

I am using a raspberry pi as the brain of a mobile robot. For debug reasons I'd like to keep a wireless connection with a PC. Communication speed is probably not an issue here, but a little bit of ...
3
votes
2answers
44k views

How do I send data from the Raspberry Pi to the PC

My project is to use the Raspberry Pi to send data taken from the "micromouse" to the PC. The micromouse will run in the maze, and then data will be sent to the Raspberry Pi most likely through the ...
3
votes
2answers
9k views

What should I use for wireless communication between an Arduino and a Raspberry Pi

I have several devices like sensor, motor, etc which are connected to the Arduino. I want to transfer my sensor data from the Arduino to the Raspberry Pi wirelessly. Also, all the data from ...
3
votes
3answers
760 views

convert a pic to bit stream and write it to gpio

I am new to the Raspberry Pi and i would appreciate it if you could help me to get started. I need to build a serial communication system, and the first stage is to be able to take a file (lets say a ...
3
votes
2answers
15k views

Verified 4G USB dongles

Is it possible that there are no verified 4G USB dongles for RPI, or the following link is out of date? If so, why is it? If not, where are they listed?
3
votes
1answer
3k views

Set custom mouse button actions

How would I set custom mouse button actions on my Raspberry Pi? Here's the idea: I have a Pi with speakers with a mouse dongle connected. I want to dismantle a wireless mouse and use the already ...
3
votes
2answers
2k views

Serial Communication between Raspi and Arduino Mega

I apologize for the double post, but I asked this question earlier and somehow it does not appear under my user and I can't make any edit or comments to it: Trouble with UART Serial Communication with ...
3
votes
0answers
4k views

Raspberry Pi and LIN Bus

I want to implement a LIN Bus using a Raspberry Pi 3. The RPi will be the master controlling slaves on the LIN Bus. My idea is to use the Raspberry Pi UART, but I am not sure to what extent this ...
3
votes
1answer
491 views

Raspberry PI Uart: pi to pi communication (B+, B2, CMIO)

Good day I am currently setting up UART communications for two Raspi's using wiring Pi's uart library. I have three Raspberry Pi's (B+, Compute Module IO board, B2). I have been able to make ...
3
votes
0answers
2k views

Serial sniffer?

I have a serial RS-232 connection from a PC's com1: port to a vendor's device. The vendor's device is going to 100% CPU utilization and the vendor claims that our software on our PC is causing that. ...
2
votes
2answers
64k views

Server and client between PC and Raspberry Pi

Hi I am doing a project that I want to make Raspberry pi and Pc communicate and then Pc can get pulse signal sent from raspberry pi. The first step I think to do is to write a python server on ...
2
votes
2answers
1k views

Raspberry Pi Air gap

can i Use a Raspberry Pi as a air gap set up? I have heard that some people will use a separate computer for decrypting messages. When they revive a message they will put it on a thumb drive and then ...
2
votes
1answer
613 views

SMS Gateway project using ZTE MF920V 4G MiFi modem

For a personal project, I'd like to use an MF920V modem. It's a mobile 4G modem made by ZTE. (Not to be confused with USB dongles). The idea is to code an api with Python or Nodejs to remote control ...
2
votes
1answer
4k views

Install Asterisk on Raspbian?

I'm new to the Raspberry Pi and I hope to start a project which will need Asterisk and Raspbian OS both installed on the same SD card. What I want I need to run Asterisk and Raspbian OS both at the ...
2
votes
2answers
2k views

Data collection from raspberry pi and send to computer (without using Ethernet or Wifi)

I use the Pi as sensor data collector and would like to to transmit the data back to software that is installed on my computer (and probably the software will instruct the Pi to perform some tasks, e....
2
votes
2answers
597 views

Communication between 2 raspberry pi's

I am trying to communicate between 2 raspberry pi's (3B and 3B+), through Gpio's (not uart, just as input output). So I am making a gpio on one Pi as Input and on the other Pi as output. So can I ...
2
votes
1answer
389 views

How to turn off RX and TX pins

I have a Raspberry Pi 4 with Buster and on top of it a 4G HAT. This HAT allows communicating via RX and TX pins. I want to communicate with this HAT via RX and TX pins but with an Arduino Nano. It ...
2
votes
2answers
2k views

What is the cheapest and long distance (20-30 m) way for communicating Raspberry Pi and attiny (or any other microcontroller)?

I need to make Raspberry Pi as my master and communicate with several slave devices (5-6 Attiny2313 in my case) that are kept 20-30 m (65-100 ft) away. Following are the requirements: cheap (...
2
votes
1answer
140 views

How can Rpi communicate with Arduino in RF (Radio Frequency), Say Using nRFL2401+?

I need to transmit and receive data between Rpi and Arduino, in RF (Radio Frequency). I must say I have next to zero experience in this field. So any help, papers, documentation, book or manual would ...
2
votes
1answer
251 views

USB serial communication between Raspberry Pi 3 and Roboteq motor controller [closed]

I am new to Raspberry Pi and it's communication. I need to make a project where I want to use a Raspberry pi 3 as a monitoring device for motors and battery system. The Raspberry pi itself ...
2
votes
2answers
1k views

Communicating between two Raspberry Pi

I would like to know what way can two Raspberry Pi communicate in? Here's the case, I am going do an autonomous robot called Micromouse with Raspberry. And I want them to run in one 16x16 maze in the ...
2
votes
2answers
20k views

Communicating with a NRF24L01

I'm trying to send signals from one raspberry pi to another using a NRF24L01+ transmitter. I was able to get the code to run on both the receiving and send raspberry pi's , but I have ran into some ...
2
votes
1answer
361 views

Making a plug and play setup for devices connecting to the Pi

Hopefully I am asking in the right place, being electrical and code, not sure. In short, I want to create a plug and play setup for different devices(mostly sensors and relays) to be attached. ...
2
votes
5answers
4k views

PIC Microcontroller to Raspberry Pi Communication

I am designing a smart energy monitoring system as my FYP, I have used two pic18f452 microcontrollers to monitor the electric parameters and they are doing it successfully. now to make it more user ...
2
votes
1answer
1k views

Has anyone used the pi to send SMS/MMS messages?

As part of my project, I'd like to send an image to a phone number. I understand I can achieve this quite easily with e-mail, but I'd like to pursue the MMS route first. I've looked around online ...
2
votes
1answer
3k views

Raspberry PI to PC communication

I am thinking of using Raspberry Pi to share Internet from a PC. The Raspberry Pi would have a Wi-Fi module which would be running in AD-HOC mode. The Raspberry Pi would be connected to a PC through ...
2
votes
0answers
253 views

Pulse Position Modulation on Raspberry Pi Zero

I want to WRITE a Pulse Position Modulation (PPM) to an arduino from a raspberrypi. Is the board capable to do this and if so, from which port/pin? A pulse position modulation is a signal that ...
2
votes
1answer
80 views

fork() Process Issue on Channel Switching via Rotary Encoder

I have KY040 rotary switcher(encoder) as shown below picture. It is the scenario that there are 5 radio stations(simple html url) in urls.txt which are read into stations list in radyoCS.py, at every ...
2
votes
0answers
395 views

Networking - Two Raspberry Pis communicating over wired connection

As a part of my research I need to have two Raspberry Pis and a Pixhawk all within the body of a UAV. I know I can get one Pi connected to the Pixhawk over mavlink, but how can I get the two Pis ...
2
votes
0answers
735 views

Compute Module Serial Interface

I am attempting to use a USB to TTL cable to create a terminal interface with a Raspberry Pi compute module on a compute module development board. I followed these instructions, but to no avail. The ...
1
vote
2answers
4k views

How to connect two PI 3 to each other through ad-hoc connection?

Okay, I am very much a NEWBIE when it comes to these type of connections. So, I searched on this website on how to be able to do this and I came across two promising questions and answers. However, ...
1
vote
1answer
128 views

How to connect to my isolated RPi

I'm working on a project that basically consists of sending an automated boat powered by a RPi into the ocean. The problem is that I can't find a cheap way (I'm working on a low budget) of ...
1
vote
2answers
3k views

GPIO communication between 2 Raspberry Pis?

I want to build a device with both a small screen and 4 digit display. I have been having trouble getting the 4 digit display to work with my model B+, but it works with the my model A, you can find ...
1
vote
2answers
1k views

How can I communicate Raspberry Pi and Arduino (in both ways) using a 10-15m distance wires?

I am starting a personal project of home automation and I have a raspberry pi and an arduino Uno board. I want communicate raspberry pi and my arduino where my raspberry should be able to write and ...
1
vote
1answer
906 views

When socket programming on raspberry pi, getting ConnectionRefusedError

I am working on a simple project where I need two raspberry pi's communicating each other with an ethernet cable. I connect one end of ethernet cable to let's say first pi and the other end to second ...
1
vote
2answers
124 views

Is it possible to write data directly from a mobile to a PC through the mobile's SD card slot?

I have to questions: -Is it possible to write data directly from GoPro to a Raspberry Pi through the GoPro's SD card slot? -How does Micro SD card function? I would like to use my GoPro (hero 1) as a ...
1
vote
2answers
359 views

Local network between 2 RPIs over GPIO

I’m planning a project where a RPI zero will be controlling a flying vehicle. It’s going to have 2 (maybe 3) cameras as an input. These will be connected over USB. I’m aware that processing the ...
1
vote
2answers
109 views

Is communication between Raspeberry Pi 2 and smartphone possible using USB

I'm currently trying to make a communication between my Raspberry Pi 2 and my smartphone (Samsung Galaxy S7). I'd like to do it using a USB cable, does anyone know if it's possible and how to do it?