Questions tagged [communication]

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

Filter by
Sorted by
Tagged with
0 votes
0 answers
18 views

LoRa HAT communication module don't send anything

I'm working now an long range communication system, and I need help. I can't use GSM, WIFI, etc. I test one LoRa Raspberry pi shield, and I bought this: link, and I have followed this tutorial. Ofc I ...
  • 1
1 vote
1 answer
49 views

Serial data over 30meter shielded Cat5e cable in industrial environment

I'm designing an industrial solution for monitoring and controlling some large raw-material processing machines. What I want to have is an RPi Pico at each piece of equipment that can standalone ...
0 votes
1 answer
39 views

How to send data between two already configured HC-05 modules

I'm new to electronics and microcontrollers, and I'm building an small project in which I'd like to send information from a master HC-05 bluetooth module to an slave one, I've already synced them ...
1 vote
0 answers
12 views

Sending and receiving messages with nicerf sv611 and raspberry pi

I am new here but i want to send and receive messages with the nicerf sv611 (868mhz) module using raspberry pi. i can't find much tutorials neither some documentation to start this up. Can any of you ...
  • 11
0 votes
1 answer
47 views

Use raspberry pi pico to open programs on host PC

I have both a raspberry pi pico and pico w, and am attempting to connect either one to a toggle switch, and use the input of said switch to either open or close an application on the host PC (...
  • 1
1 vote
1 answer
65 views

RF22 library for Raspberry Pi Pico

I want to use this RF22 module (in a breakout board) with a Raspberry Pi Pico. However, I have tried both the RadioHead (which is for teensy boards, as i found out later) and RF22 library without any ...
-1 votes
1 answer
191 views

Rx, Tx/UART not being detected by Pi? What is wrong?

I'm working on Serial communication between the Raspberry Pi and the Arduino, with the Raspberry Pi serving as master. I connected, using a logic level shifter, Arduino's Rx (Software Serial was used ...
  • 89
0 votes
1 answer
304 views

Minicom not working

I am trying to connect my Pi 4 running Rasbian 2020 to an Arduino, after making all the connections I try to communicate with the Arduino by using Minicom. However, Minicom doe not respond to anything ...
0 votes
0 answers
168 views

Pi Pico nrf24l01 on arduino ide

I have made an Rx and Tx with nrf24l01, when I have both serial monitors open (Rx& Tx) the communication is fine I can see package receiving, but when I close e.g. the serial monitor of Tx. I don'...
0 votes
1 answer
843 views

How to communicate between multiple Raspberry Pi using Python

I am looking to buy some Raspberry Pi computers to do various tasks. For example, maybe one could water a plant when requested. The part I am struggling to find help with is creating a server where a ...
-1 votes
1 answer
60 views

Can arduino open and play video files off of raspberry Pi with serial communication?

I just want to know if it is even possible to have serial communication from arduino mega to raspberry pi3 , to open and play a specific video file stored on the Pi?
  • 1
0 votes
1 answer
60 views

Two-way connection between a PC and Pi via Ethernet cable

I'm planning to establish an ethernet connection between a PC and a robot(with the Pi on it and the robot and PC being around 30ft apart). I would like to use the Pi to control operations onboard(Pi ...
1 vote
0 answers
209 views

How to set up communication between two Raspberry Pi without internet [closed]

I was trying to learn how to set up communication between two raspberry pi in close proximity in a remote area without a router. I am new to raspberry pi and started trying to figure out MQTT/...
0 votes
0 answers
64 views

Connecting Pi`s audio jack to 2-wire phone line

I want to connect intercom to Pi. Typical schematics for intercom telephone is There is line with phantom power on X1-X2 about 7-16V (=12V if clean, short wires). With Raspberry will use hat or usb ...
  • 109
0 votes
2 answers
444 views

433MHz RF communication between Arduino + Raspberry Pi

I bought a 433MHz receiver and transmitter to send data from a Raspberry Pi 3 to an Arduino Uno. I searched the internet for tutorials, Arduino StackExchange and Raspberry Pi StackExchange but I did ...
-1 votes
1 answer
329 views

Slow UART communication between Raspberry Pi Zero and 4B using pyserial

I'm testing serial communication between two Pi's (Zero -> Pi 4) with Python pyserial library. I am using Zero as camera with preprocessing and sending preprocessed data to Pi 4 via UART (/dev/...
-1 votes
1 answer
65 views

How communicate between multiple raspberry pis over the internet?

0 I am working on a project with raspberry pi. I have a little experience with raspberry pi, but not so much. The project is as folows: There are 3 raspberry pi's with each a camera. One raspberry pi ...
0 votes
0 answers
41 views

Issue with read Xbee Data

Here, I am interfacing Xbee(Rx) with raspberry pi 3 (Model B) and on another end Xbee(Tx) with Arduino UNO. On the Tx side I have a mechanical tool which is sending two types of data. But I am not ...
0 votes
1 answer
182 views

How to send data from RPI to Arduino via I2C

Im working on a project to build an autonomous lego car. Im running into some problems here, and i could use some help. Right now, im struggling to send and receive data from RPI (4) to Arduino (Nano)....
  • 1
0 votes
1 answer
150 views

RS485 Interface on Raspberry Pi is not initialized

I have a working RS485 shield mounted on my Raspberry Pi device. And I use it successfully for modbus rtu communication. So I am pretty sure that my raspberry device and RS485 interface is ok. I tried ...
0 votes
1 answer
40 views

How to get an app to talk to a Raspberry Pi without the Pi being initially connected a network

I've been working on a project where I need an app I made to be able to get scripts to run on my Raspberry Pi. The problem is I need it to work so that if anyone had the app and my pre-configured Pi ...
1 vote
1 answer
713 views

Connecting Pi to an old analog phone

I want to connect an analog telephone set with Raspi which will house a telephone directory. Using telephone set's digits (alphabets) any user shall interact with GUI on Raspi to search for a number. ...
-1 votes
1 answer
125 views

What's the best solution to detect the coming of a person [closed]

I have a robot which should detect an approaching person and identify them in a range of about 1-3 meters. For that, the person should have something on their key ring, ideally without battery life ...
2 votes
0 answers
58 views

Multiple RPIs to 1 PC communication with CAN BUS

I have to establish multiple RPI(Let's say 2-3) to 1 PC communication. I have to set up a CAN bus in either the PC or RPI. I am considering using an Ethernet cable and setting up a python server on ...
-1 votes
1 answer
1k views

How to get two raspberry pi's to talk over internet

I have an idea for a special project, but in order for it to work I need two raspberry pi's to talk to each other over the internet, not wifi. I use python3 as my programming language, and I want one ...
  • 79
1 vote
1 answer
1k views

Sending data to blynk with python to control widget LED

Greetings fellow programmers! Yesterday I asked a question on how to install blynk for python3, and thanks to some generous help I got it to install itself. However, now I need to know how to control ...
  • 79
3 votes
2 answers
726 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 ...
  • 31
2 votes
1 answer
554 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 ...
  • 233
2 votes
1 answer
206 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
2 answers
929 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 ...
  • 123
0 votes
0 answers
46 views

Wireless Protocol to use in a Forest

I am planning to make a robotic tank for monitoring a large wilderness area like a forest. I need some form of radio communication with which I can control the tank from anywhere in the world. What ...
0 votes
0 answers
33 views

(Wired or wireless:) Synchronise two RaspberryPi units over 300m to within 1/48000 s

I need to synchronise two RaspberryPi units over 300m to within 1/48000 s. I would like to investigate both wired and wireless solutions. Suppose I run 2 wire between them: - pinX_on_unitA <--> ...
  • 117
1 vote
0 answers
236 views

Communication between computer with Labview and Raspberry Pi

I would like to use a computer with Labview to send commands to a Raspberry Pi, for the moment I am just trying to get a LED to blink. What would be the best way to proceed ? I have thought of two ...
2 votes
0 answers
334 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 ...
  • 121
1 vote
0 answers
48 views

New to Pi I need to connect a device via serial communication, how do I teach myself?

I've been asked to connect and control a finger-sensing device to a Raspberry PI. There is a protocol to respect called OSDP. It supposes a serial connection on top of RS485. I'm a seasoned C/C++ ...
1 vote
2 answers
511 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 ...
  • 193
1 vote
1 answer
1k 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 ...
  • 133
1 vote
1 answer
3k views

Rpi3B+ buster USB to Serial (/dev/ttyUSB0) Communication Problem

I'm trying to establish a serial communication between my Raspberry PI 3 B+ - running on Raspbian 10 Buster - and a testing machine I have. The normal behavior of the machine is to send test related ...
2 votes
1 answer
361 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 ...
  • 23
2 votes
1 answer
738 views

Control Raspberry Pi from long distances not using WiFi

I want to control my Raspberry Pi from a long distance not using WiFi and be able to send my data to it and receive data from it distance could be like 12 kilometres for more than it and and if ...
0 votes
0 answers
505 views

RPI GSM Add-on SIM800 AT commands are not working

I am trying to send sms using RPI Add on v22 module and Raspberry-pi 3+. I have mounted this module on top of Raspberry-pi. When I use minicome using minicom -D /dev/ttyS0 -b 115200 -o I get the ...
-1 votes
2 answers
1k views

Communication between rpi and microcontroller [closed]

I need to program communication between raspberry pi 3 and microcontroller. I'm wondering what type of communication is the Best. I2C, UART or SPI?
0 votes
0 answers
203 views

Communicate between two Raspberry Pis using USB-Ethernet cable

I have two raspberry pis I want to communicate between. For convenience, let's say one is always the talker and the other is always the listener. The listener's ethernet port is occupied by another ...
0 votes
0 answers
200 views

PiCAN2 network is down

I am using RPi 3 model B+. I am trying to set up can communication using Pi CAN2 (From SKpang) with baud rate 500000. But I am getting "write: Network is down" whenever I am sending "./cansend can0 ...
  • 1
0 votes
0 answers
299 views

reading EMG on Rpi3 using Teensy 3.2 on usb serial

We are using MyoWare EMG sensor and reading the RAW EMG pin as well as filtered SIG pin on the board. What it basically does is sends an analog value as a fraction of the input Voltage, which in this ...
  • 1
1 vote
1 answer
169 views

Peculiar features of I2C communication between RPi and Arduino

I am currently trying to establish two-way communications between an Arduino Leonardo and a Pi model B using the I2C bus, as slave and master respectively. Spookily, the Pi can successfully send ...
0 votes
0 answers
77 views

Should I buy a pi zero with my Pi 4 4GB

I am buying a raspberry pi 4B with 4GB of ram and I was wondering what the connectivity between raspberry pi 4 and Pi Zero is like? Do they communicate well? and what software do you suggest? Is ...
  • 1
4 votes
2 answers
7k 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 ...
  • 315
0 votes
2 answers
48 views

Communicate with computers on external networks

I'm trying to build an application with my RPi 3B that get some data from connected sensors. Once I got the data, I'd like to send them to a computer that is on an external network via a script in ...
0 votes
1 answer
62 views

LoRaWAN connection between three Raspberry Pi 3s

Are LoRaWAN devices able to transmit compressed/zipped JSON files which are 5-10 Kb big? Furthermore I've been reading up the LoRaWAN technology to get a better understanding. I would like to have 3 ...
  • 131