Questions tagged [communication]
Regarding communication between a Raspberry Pi and another device. Communication that is not specific to any particular medium.
143
questions
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0answers
68 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
0answers
8 views
CAN Shield for using Raspberry Pi with Codesys?
On the official Codesys store page of the BeagleBone, it says that a CAN-Cape is necessary for using CANopen. If I understood correctly, they are referring to a Comms Cape like this one.
I know this ...
0
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0answers
39 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 ...
0
votes
2answers
87 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 ...
0
votes
1answer
87 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
1answer
48 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
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0answers
20 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
0answers
21 views
Communicating with a raspberrypi zero 1.3 connected via usb using python
I am running a program on my raspberry pi that always reads out the state of a list which changes in real time and is set by a pc connected to it. The raspberrypi is connected via usb and can be ...
0
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0answers
32 views
Serial communicaction problems between Raspberry Pi and Arduino
I am carrying out a project in which I transfer information between an Arduino Mega and two Raspberry Pi 3 Model B. On the first Raspberry there is running a console program that is connected to the ...
0
votes
1answer
64 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)....
0
votes
1answer
66 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
1answer
33 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
1answer
257 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
118 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
48 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
685 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
871 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 ...
2
votes
2answers
565 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
366 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
1answer
136 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
582 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
39 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
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0answers
32 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
146 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
242 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 ...
1
vote
0answers
37 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
314 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
836 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
2k 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
244 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
541 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
322 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
737 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
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0answers
142 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
162 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
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0answers
263 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
140 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
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0answers
75 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
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 ...
0
votes
2answers
38 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
57 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
542 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
463 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
72 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
48 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
419 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 ...
1
vote
0answers
385 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
34 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
60 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
7k 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:
...
