Questions tagged [communication]
Regarding communication between a Raspberry Pi and another device. Communication that is not specific to any particular medium.
135
questions
1
vote
1answer
55 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
1answer
101 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 ...
1
vote
0answers
39 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 ...
-2
votes
1answer
50 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 ...
1
vote
1answer
161 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 ...
1
vote
2answers
94 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 ...
0
votes
0answers
56 views
Tektronix Oscilloscope under PyVISA on a RaspberryPi 3B +
I am working in a project that requires to control and automatize to devices, a Function generator HAMEG HMF2550 and a Tektronix TDS2024C, which are connected via USB to the RaspberryPi (I will ...
2
votes
1answer
123 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 ...
1
vote
1answer
77 views
How can Rpi communicate with Arduino in RF (Radio Frequency)?
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
257 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 ...
0
votes
0answers
35 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
0answers
39 views
Bridge between Twilio API/phone line and closed circuit 20v intercom
Question about how to achieve the below using a Raspberry PI. What hardware would i need to buy and is the below possible?
I have a closed circuit intercom system in my house. This is a video ...
0
votes
0answers
31 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 <--> ...
1
vote
0answers
57 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
0answers
153 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 ...
0
votes
0answers
222 views
Connect mobile phone/app to Pi Zero W via Bluetooth
Is there any easy way to connect my android (later ios too) device to my pi zero w via Bluetooth? I'm looking for a way to send data to my mobile phone without using Wifi.
edit: I want to write an ...
1
vote
0answers
26 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
2answers
107 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
1answer
230 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
1answer
1k 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
1answer
140 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 ...
1
vote
1answer
234 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
0answers
149 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
2answers
256 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
0answers
71 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
0answers
82 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 ...
0
votes
0answers
194 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
vote
1answer
88 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
0answers
71 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 ...
3
votes
2answers
3k 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 ...
0
votes
2answers
36 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
1answer
54 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 ...
-1
votes
1answer
286 views
Serial communication error
Could someone help me to fix this error while trying to connect RPi 3 B+ to an inverter in order to read data via CH340G usb module,
Below the used code :
from pymodbus.client.sync import ...
1
vote
1answer
299 views
Modbus communication
I try to read data from a device by raspberry 3 B+.
those two devices are connected via CH340G usb module (USB to Serial (TTL) adapter).
Concerning the python code; here's:
from pymodbus.client....
1
vote
0answers
46 views
CAN bus read on RPI3
I have 10 CAN IDs on the bus and would like to read all the 10 IDs every 0.1 seconds. I was able to write the code below but it shows me one message only.
import can
bus = can.interface.Bus ("can0", ...
0
votes
0answers
41 views
How do I make my RPi talk to my PC over an Ethernet Cable?
My PC is running Windows 10. I'm working on establishing communications from my RPi to my PC via an ethernet cable. I've set up static IP addresses for both the PC and RPi on their respective ethernet ...
0
votes
2answers
235 views
capture Image with picam then send to another pi via UART
I would like to send an image(JPEG) captured by a pi-zero (in a in-closed container) to an pi3 for storage and analysis. Currently I have UART via gpio set up, but so far I have only been able to send ...
0
votes
0answers
217 views
Read data from a balance via RS232 port using rs232 to usb converter cable in rapsberry pi
I am a beginner to this,
I have a balance (scale) that I need to read the data (weights of material) from. Data will be read every 10 seconds and I have looked up RS232 codes in here and utilised ...
0
votes
0answers
31 views
raspberry in the middle
I have a pc that can communicate to broader intranet, but it now must also connect to LINUX server that is its own network via RJ45 ( wired LAN ). The Raspberry could communicate to the special ...
-1
votes
1answer
55 views
p2p - Send data from Windows Computer to RPI [closed]
I want to be able to send a small amount of data quickly directly from a windows machine to a Raspberry Pi 3 B+.
My restrictions include:
Preferably not having any sort of wired connection between ...
0
votes
1answer
4k views
Could not open port /dev/ttyS0: Errno 13: Permission denied: '/dev/ttyS0'
I am getting this error whenever I am trying to run this code:
import serial
from time import sleep
ser = serial.Serial ("/dev/ttyS0", 9600) #Open port with baud rate
while True:
...
0
votes
1answer
79 views
Long distance wired communication between 2 raspberry pi [closed]
I need to send video feed from one raspberry Pi to another raspberry Pi for 10 meter . Can I use Ethernet cable ? what do i need to do?
1
vote
0answers
18 views
How to communicate with my raspberry pi without using ssh or http? [duplicate]
I have a raspberry pi at home that I want to control from the "outside" world (e.g. my office). The thing is that my home router is not visible to the outside world; it's within some kind of a "subnet"...
0
votes
1answer
56 views
Using Raspberry in Nanosatellite [closed]
I want to use raspberry pi in space projects like cubesats. I worry about effects of space radiation on raspberry.Is this possible to do?or i need to choose another board or something like that?
2
votes
1answer
74 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 ...
0
votes
1answer
161 views
I am trying to create a HID that controls the up and down arrow keys with the raspberry pi
I am trying to create a HID that controls the up and down arrow keys with the raspberry pi. I don't know the simplest/best way to connect the pi to pc for live data exchange.
My idea is that the pi ...
1
vote
1answer
606 views
Serial communication using GPIO Pins for more than 2 raspberries
I'm doing a project at work which involves multiple (more than 2!) raspberry pies (Model 3 B+) being able to talk to each other (talk to each other means being able to send data of the size of a ...
0
votes
0answers
200 views
Raspberry Pi Lifi Proof of Concept Help
I'm currently an Electronic Engineering student. I'm coming to my third year and I can build a project of my choosing to write my dissertation about. I have decided to do it on Lifi. I would really ...
2
votes
0answers
3k 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 ...
0
votes
0answers
418 views
Using RPI 3 with Carberry as a LIN Master and display data on 7" display
I'm looking at purchasing a Carberry (expansion board for the Raspberry Pi) to read LIN slave messages and display them on the Raspberry official 7" display. However I'm having trouble determining a ...
