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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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15 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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0answers
11 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 |...
0
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1answer
26 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
130 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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0answers
27 views

How to recieve FM on raspberry pi 3b+? [duplicate]

How to recieve radio input to Raspberry Pi 3 model B+? please help
3
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2answers
75 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 ...
-1
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0answers
18 views

Recording audio with Rasbperry Pi 3 and TEA5767

I'm trying to make an FM radio using a TEA5767 while also trying to sample 1-2 seconds of audio through the pi and was wondering how could I go about that? I'm thinking of feeding the aux out of the ...
3
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2answers
109 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
27 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
28 views

Raspberry Pi Reading Multiple RFID Frequencies

Does anyone have any knowledge of RFID attachments or sensors for the Raspberry Pi which are able to read or write multiple frequencies and protocols? Like a one-size-fits-most approach? I have a few ...
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0answers
29 views

How to install the latest firmware for a Ciseco Slice of Radio on a RPi 1 model B

I have updated the firmware for many Ciseco radio devices using their Explorer Plus but this only runs under Windows. I now want to update the firmware on a Slice of Radio device running on a RPi ...
2
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0answers
317 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
272 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 ...
0
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1answer
352 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
38 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
3k 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 ...
0
votes
1answer
51 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 ...
6
votes
2answers
143 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
40 views

Can hardly see which radio button is clicked

I am using a 3.5 inch pitft on a raspberry pi 3 on three units. I can hardly tell that a radio button is checked. It looks slightly shaded, but difficult to tell the difference from the unchecked ...
3
votes
0answers
562 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 ...
0
votes
1answer
663 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 ...
2
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0answers
1k 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 ...
3
votes
1answer
396 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 ...
1
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0answers
1k 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 ...
3
votes
1answer
504 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, ...
0
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1answer
105 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. ...
0
votes
1answer
3k 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 ...
0
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4answers
3k 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 ...
-1
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3answers
2k 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 ...
0
votes
1answer
574 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
568 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 ...
1
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1answer
832 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
votes
1answer
690 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 ...
0
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1answer
551 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 ...
26
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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
votes
1answer
4k 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 ...
36
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4answers
82k 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 ...
2
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2answers
1k 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 ...
1
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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 ...
1
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3answers
754 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
votes
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
votes
3answers
421 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 ...
0
votes
2answers
268 views

Which RF transceiver to use for a network using Rpi or Arduino?

I am looking for advice on how to create a RF network to send and receive data both at the same time. The master Arduino or Rpi Zero receives temperature readings from the slave nodes which passes it ...
1
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0answers
729 views

Any way to receive DAB radio on the Raspberry Pi?

I've been looking around and can't seem to find something where someone has got DAB radio working on the Raspberry Pi with an RTL-SDR. It seems possible, as the RTL-SDR is fully capable of receiving ...
1
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1answer
157 views

Pi-mote sockets not picking up signal from RPi

I bought a Pi-mote control kit which is a radio transmitter control add on board and mains electricity socket switched by their own radio receivers. However I can't the sockets to pick up the signal ...
1
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1answer
874 views

Remote Control Raspberry Pi

Is there any other way to remotely control the raspberry pi? I built a 4 wheeled robot that is automated by ultrasonic sensors, yet today I have to decided it to make it remote controlled, what are my ...
4
votes
4answers
3k views

Is it possible to trigger 10 (or 100) Raspberries to take photos at the same time using WiFi?

Can a system consisting of 10x Raspberry Pi's, 10x RPi Camera Modules + WiFi dongles be reliably & consistently synchronized over WiFi to take photos at the same time? Or are radio triggers a ...
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0answers
1k views

Raspberry Pi stream video over RF

I would like to stream video from a Raspberry Pi over RF to another Raspberry Pi. Here are a few requirements: Range of at least 1KM (pretty much line of sight) I would also like to send some data ...