Questions tagged [radio]

"Radio" here refers to wireless communication other than normal wifi or bluetooth bands, e.g. FM, shortwave, and RC.

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30 views

Control 868MHz device from a RPi4

I am trying to control my electric blind (elero brand, controlled by this remote) from my RPi4, and while I'm fine tinkering with anything on the software side, I must admit my knowledge of GPIO and ...
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3answers
692 views

RF 433 MHz cannot transmit or receive from more than 10-30 cm

I have 3 Pi's and a transmitter and receiver on all of them. We are trying to just send a number from Pi 1 to Pi 2 and have Pi 2 send back a response. We followed the instructions in https://www....
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1answer
54 views

Using EnOcean PI 868 with raspberry PI4

first of all: I'm new to raspberry I.ve just bought a raspberry PI 4 together with an EnOcean PI 868 module to set up a house automation system. To make it run I've tried the steps described on the ...
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1answer
133 views

How can Rpi4B use UART to read and analyze received data at a 3DR FPV Air Radio Module?

I am trying to set up the FPV telemetry radios (Air and Ground Module 433MHz). I have connected the Ground module to my laptop (USB) and air module to Raspberry Pi 4 UART pins. Using Mission planner ...
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46 views

Can the Raspberry Pi Zero W receive data from multiple Bluetooth Low Energy peripherals simultaneously?

Does the Bluetooth radio on the Raspberry Pi Zero W v1.3 allow it to receive data from multiple Bluetooth Low Energy peripherals simultaneously?
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68 views

FM Radio with HifiBerry Amp2

Is there a way of running a Raspberry Pi 3 with a mounted HifiBerry Amp2 together with an FM Radio Module e.g. TEA5767 FM Radio Breakout Board? Currently I set up my RPI to run Mopidy and Spotify ...
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0answers
84 views

Raspberry PI 3 with Funcube Dongle Pro+ SDR does not read the antenna

I am trying to configure my RPi3 into a small receiving ground station. I already have installed the gnuradio, gqrv, gpredict packages. The RPi is connected to an SDR dongle (Funcube Dongle Pro+) with ...
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0answers
92 views

RF 433Mhz reciever not finding remotes

I'm having some trouble with my 433Mhz receiver on my pi. I first tried to read the signal my Nexa PET-910 and 433Mhz doorbell sent on the pi, but I could not get any usable data, just noise, or no ...
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1answer
39 views

Stream web radio and choose via Smartphone app

the question could sound trivial, but I'm super new in the Raspberry world. I searched a lot in the internet for this problem, but I wasn't able to find an "easy" solution. I've a raspi 3 with ...
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1answer
61 views

Radio Transmission

Yes, I pretty much a noob, but I was wondering if there is a way to program the Raspberry Pi in Assembly Code to transmit data via radio frequencies (like remote control) between itself and another ...
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1answer
485 views

433mhz RFSniffer doesn't recognize signal

as in the tile, I've tried to sniff a 433mhz radio signal with my raspberry pi 3b but something failed the receiver is one of the cheaps available in the web, 5v powered. I've followed this tutorial ...
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33 views

5v pin usage for 433mz transmitter receiver

I've bought a 433mhz transmitter receiver and I made a check on model SODIAL(R) 015274A2 the strange is in two links we have 2 differente specs, one says: https://www.amazon.com/SODIAL-433Mhz-...
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28 views

PIPE jack_capture on pi_fm

I want to transmit sound over FM with a Raspberry pi. To avoid latency, I would like to use jackd rather than ALSA to process audio. I try this command to route stdout into pifm : jack_capture -ws |...
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1answer
40 views

RF script automation

First time poster, so forgive me if I missed anything. I'm trying to get an automation script working with some RF modules. I want a script to wait for a certain code, and then output 1/0 to a file. ...
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2answers
1k views

FM transmitter antenna length

I'm a new raspi user, and I'm starting to build some projects with hardware. I would like to try this FM radio station for example, but I have a doubt about the antenna's length. This is important ...
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2answers
281 views

How much electromagnetic or radio interference is caused by a typical unshielded Raspberry Pi?

Most desktop computers come with metal cases, which have a side-effect of blocking the radiofrequency emissions or electromagnetic radiation which is produced by the internal electronics. Back when ...
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2answers
699 views

Detecting electromagnetic field with Raspberry Pi

For my school project, my objective, among others, is to detect EMF changes (frequencies between ~400MHz and 2,4GHz) in a room (to simplify it even more, let's assume it's gonna be very small room/...
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1answer
49 views

starting up radio and one led

I'm using this in as my /etc/init.d/pirateRadio.sh the Radio does play a wav with this in the rc.local export PATH=/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/sbin:/usr/bin sleep 10 ( exec &&...
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0answers
562 views

Transmit 433 MHz Manchester from Arduino - receive on Rasberry Pi

On Attiny85 I'm using Manchester encoding library with code #include <Manchester.h> #define TX_PIN 1 uint8_t transmit_data = 123; void setup() { man.workAround1MhzTinyCore(); man....
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2answers
356 views

PiFmRds: Raspbian freezes when I change windows. How do I fix it?

I am running my raspberry pi 3 with a radio station software PiFmRds The program works fine but then when I go to move the window (or any other window) the system freezes and I have to unplug and ...
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1answer
476 views

Send and receive 868Mhz signals with my Pi

My home lighting is achieved using wireless Delta Dore switches working in 868 Mhz. Here are my switches reference : https://www.deltadore.fr/data/product_files/6351091/documents/notices/Util/fr/...
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0answers
41 views

Sudden Square Wave Transmission

I was playing around with korn101's PiNumberStation (found here: https://github.com/korn101/PiNumberStation). It uses GPIO Pin 4 on the Raspberry Pi Model B. I had it working excellently. I had ...
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3answers
4k views

AM/FM receiver that can be tuned through raspberry pi?

Is there an AM/FM receiver that can be hooked up to the raspberry pi and be tuned by the pi? I am building a radio and obviously need a receiver, and I want to be able to tune it through the pi. I am ...
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1answer
56 views

dev file for microphone

On my pi, I want to use my microphone in the terminal, as if it were a sound file. If it is not clear what I want to do, I am trying to broadcast sound as an fm radio signal. The command that I use ...
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2answers
162 views

Gather data in rural areas

I am building a prototype with temperature and humidity sensors for rural areas and I am trying to determine which is the best way to gather data, since Internet may not be available (no WiFi). I am ...
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0answers
737 views

Loopback to aux out and record audio at the same time from audio in

I am currently developing a device that silences adverts from a streaming radio. Im taking audio input from a radio to a USB sound card.To silence the ads, I have am currently using the arecord ...
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1answer
795 views

How to control a RF transmitter using Raspberry pi GPIO [closed]

I'm very new to this so apologies if this is a stupid question. But I'm thinking of controlling an RC car with a RF transmitter/ receiver pair using the Raspberry Pi. I'm thinking of hooking up the ...
3
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0answers
2k views

Pi bluetooth not detecting any devices

Board: Raspberry Pi 3 I have a Pi which is unable to detect any bluetooth peripherals. I diagnosed the bluetooth service by running sudo service bluetooth status which throws the error Failed to ...
2
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1answer
468 views

How do I connect my PHAT-DAC to the Adafruit class D stereo amp

Following on from my previous question here I have the Adafruit 2.1 W stereo amp and now I'm researching how to connect it to the Pimoroni PHAT-DAC. I've found plenty of references to a mono amp but ...
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0answers
2k views

Testing 433 MHz Receiver- Data Pin Indicating Constant Signal

I'm trying to understand what's happening with the 443 MHz receiver I've plugged into a Raspberry Pi3. When I plug the data pin into GPIO 21 and I run a simple python sniffer script to plot the ...
2
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1answer
638 views

Do I need an amp if I'm using a PHAT DAC on my Pi Zero?

I've bought a Pimoroni PHAT DAC for my Raspberry pi zero and despite weeks of searching I can't find a definitive answer on whether I need to get an amp breakout board too like this guy http://...
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2answers
1k views

Omxplayer change volume when playing

I am trying to change volume. OMXPlayer is not using ALSA so it is not reacting. I am playing live radio stream and I want to change volume of it without stopping the radio. Is this possible? If yes, ...
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1answer
109 views

Software for Pi based Wifi Stereo system with multiple clients

What I want to do is install the raspberry pi in my car. What it will do is connect to my speakers in my car and give off a wifi hotspot. This hotspot will not actually connect to the internet. ...
1
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1answer
4k views

Can I transmit I2C over RF?

Is it possible to transmit and receive i2c data wirelessly (not via wifi or ssh) I want to use thumb stick joysticks to move motors wirelessly, at the moment I have two connected to the i2c ports ...
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4answers
4k views

How to autoplay an audio stream at startup?

I'm trying to use a Raspberry Pi create an internet radio player that only needs to play one station, but always plays that station on startup. I know I need mpd and mpc and to enter the URL of the ...
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3answers
3k views

Boosting FM range transmission from Raspberry Pi

I want to boost FM transmission range when using Raspberry Pi as transmitter. I found this circle: Source: https://www.safaribooksonline.com/library/view/ipod-and-itunes/0596007787/ch01s07.html Will ...
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1answer
648 views

What is the current Pandora TLS Fingerprint for Pianobar Running on the Raspberry pi?

I have loaded the current version of pianobar but I need the current TLS fingerprint from Pandora to establish a connection.
2
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1answer
676 views

Read RF from Remote trouble

I have myself a Raspberry pi and Arduino which I've equipped with a 433mhz transmitter (to the arduino) and a 433mhz receiver to the Pi. I can read the output fine from the transmitter in Pi console ...
3
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2answers
4k views

./RFSniffer failes on Raspberry Pi 3

I`m trying to send a message over 433MHz with my raspberry pi Link to hardware Sender and Receiver are connected. Here is a Link to the tutorial I used to connect sender and receiver (Link) wiring ...
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1answer
1k views

PiFm RDS cuts off after a few seconds

I am using my Raspberry Pi as a radio transmitter. I'm using the Pi FM RDS program. It works fine for a few seconds, but then it just suddenly stops broadcasting the sound. The program is still ...
2
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1answer
1k views

How to communicate with a raspberry pi cube satellite?

I am planning to build a cube satellite that will be above 150km - 600km altitude in the LEO(Lower earth orbit). What can i use to communicate with it. How would that work? I know I will need a radio ...
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1answer
694 views

Packet radio (modem)

I would like to build a long range (10s of kms) wireless link in the unlicensed spectrum (like amateur radio - maybe 27 MHz, ideally with variable frequency setting). The transfer speed requirement is ...
27
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1answer
5k views

Why can't the Pi 3 receive FM radio by itself?

I've read online that the Pi 3's WiFi/Bluetooth chip (BCM43438) can also receive FM radio. Why can't I use it to receive FM signals?
4
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1answer
5k views

Send and receive 868Mhz radio signals

In my home I have sun-shade that I can control via a handheld transmitter. I already figured out that it is sending on 868 mhz. Now I'd like my raspberry to read send those signal instead (or as well ...
38
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4answers
103k views

Add an external antenna to a Pi 3

Makezine's writeup on the Pi 3 this morning included a somewhat tantalising section: The other interesting thing on the back of the board, right next to the wireless radio chip, is something that ...
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2answers
2k views

Controlling a common RC car

I need to test my computer vision stack written in C++ on a mobile robot and I need to control the robot from a Linux ARM board (which can be a Raspberry Pi). Since the specialized wheeled robot ...
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3answers
2k views

Correct wiring for 433MHz transmitter/receivers?

I have ordered some of these commonly used 433MHz transmitter/receiver units with the intention of using my Pi GPIO pins to send and receive radio signals. I have my approach mostly figured out, but ...
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3answers
983 views

how to make radio wave with pi2

As pi2 have processing power of 900MHz it can generate upto 250Mhz radio frequency. I have run fm_transmitter on pi2 it was working but only with one song(star_wars.wav) and code was in c++. Does ...
2
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3answers
1k views

Communication between radio transmitter (device A) and receiver (raspberry)

My project is to build a raspberry based emergency button for use at home (if someone feels unwell, for example). I would like to use the raspberry pi as a receiver of a signal sent by a (short-range?...
4
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3answers
504 views

PiFm dBµV/m without an antenna

I have been wanting to tinker with the Raspberry PI to learn more about electromagnetic frequencies; however, before initiating anything, I read the legal debates regarding PiFm. It appears that both ...