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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16 views

accessing terminal from long rang

I'm new here and I followed a guide to create a Raspberry Pi 3B+ / Navio2 drone. I have it all set up with radio telemetry modules and Mission Planner is working. Now my goal is to access the RPi/...
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20 views

three position on/off/on

Hi I am converting a 1963 Roberts R300 transistor radio into an internet Radio. I will be using a raspberry pi for this and as the radio has a three position on/off/on switch to choose between long ...
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1answer
42 views

How is the radio module connected to motherboard (CPU) on Pi-4? [closed]

By this link we can see that in Pi 4 there is Wi-Fi module (called radio module under the picture). But I can't figure out, how is this module connected to motherboard? Is this PCI bus or whatever? ...
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30 views

Inject audio and broadcast/stream over internet

I like to attach an FM tuner like Si4703 to raspberry pi 3 and want to rebroadcast particular frequency (FM) over the internet (I want to listen to local FM when I'm in my office since I don't get a ...
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67 views

pigpio: Read PWM from RCcontroller then send to ESC via GPIO

Im trying to learn Python by combining my interest in designing an AWD radio controlled car (3D printed, Im decent with Fusion 360 too) with some smarts from Pi/Python to allow things like software ...
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33 views

Dynamically setting address of HT12E

I have a project where I need to send a wireless signal to one of several receivers to turn on an LED. One transmitter, several (many) receivers, each with an LED. The receivers need to have low ...
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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 ...
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1answer
69 views

Signal generator connected to raspberry pi via USB

Ido connect to the device from my raspberry pi and able to send commands. The power consumption of the SG is 2.5 W. That means that the current of usb port should be 2.5 / 5 = 500 mA. >>> ...
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61 views

Unable to intercept the code of my remote control at 433 MHz with RaspberryPi

I'm trying to reproduce the code generated by my universal 4-channel radio control with RaspberryPI. I cloned my remote with a universal remote like this: I used the libraries included in 433Utils ...
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1answer
302 views

Pi based Radio Telescopes?

I'm interested in building a Raspberry Pi based radio astronomy telescope. I'm not too set on any particular science objectives, but rather just want to get some experience with the full system, learn ...
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2answers
716 views

How to decode a 433MHZ signal

I've made the classic 433mhz send/receive experiment, using cheap hardware on the same breadboard and same raspberry, I've wired both sender and receiver to VCC 5V, GND to GND and data to GPIO 27 (...
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273 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
947 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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2answers
362 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
708 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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136 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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246 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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163 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
73 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
74 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
1k 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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1answer
46 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
2k 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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4answers
801 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
1k 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
90 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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768 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
418 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
620 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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42 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
5k 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
61 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
164 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
971 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
867 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
514 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
689 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
2k 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
110 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. ...
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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
5k 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
685 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.
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1answer
773 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 ...
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2answers
5k 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
749 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 ...