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Questions tagged [radio]

Do not use this tag for Radio buttons. Radio is the transmission of signals through free space by electromagnetic radiation of a frequency significantly below that of visible light, or a device for doing the same. Radios are typically used for communication including voice, video and data. This includes Wi-fi, Bluetooth, Mobile phones, GPS, Radar, some remote control devices and near field communication devices (NFC) such as contactless smartcards.

Radio is the transmission of signals through free space by electromagnetic radiation of a frequency significantly below that of visible light, or a device for doing the same. Radios are typically used for communication including voice, video and data. This includes Wi-fi, Bluetooth, Mobile phones, GPS, Radar, some remote control devices and near field communication devices (NFC) such as contactless smartcards.

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Is there a Linux radio standard?

We're about to embark upon implementing a device running Linux that (among other things) will be attached to a software defined FM/AM radio that can also receive RDS data describing playlists and other such stuff. It's a relatively stupid device…
Omnifarious
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Sending out Radio Frequency (RF) Signals with Android App

Is it possible to built an app which sends out RF signals? Is it possible to control the exact frequency? So each button would send different frequency signal? How far those signals usually reach?
sillypurple
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Android: Force data to be sent over radio vs WiFi

Is it possible to force an Android application to use only the mobile radio connection (3g/4g/etc), disallowing the use of WiFi? I think I want to use a HIPRI connection: (ex: WIFI turned on, use HIPRI…
wuntee
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Where can I get an open source Radio driver and RIL for an android phone?

I am looking for a phone (preferably android) where I can use software to have full control over the cellular radio hardware. anyone know of such a device? preferably a popular device on the market :) My last topic on this was rather rapidly closed…
Chozabu
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Get CellID, LAC, ... on iOS 8.3

Since iOS 5.X, I used to get radio information with these methods : Get CellID, MCC, MNC, LAC, and Network in iOS 5.1 But with the iOS 8.3 beta (and 8.3 GM), this private API _CTServerConnectionCellMonitorCopyCellInfo doesn't work anymore.
Boobby69
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Radio Frequency Triangulation (Positioning)

I'd like to know if it's possible to somehow triangulate (or otherwise) get a location of a moving object inside a defined area, let's say, 200m x 200m, by using radio waves. I've been looking at some transceivers and the range shouldn't be…
Nicholas
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How to capture raw signal from wireless router?

I have seen several projects now which derive novel spatial information from radio data collected from a typical wireless router: http://wisee.cs.washington.edu/ http://www.extremetech.com/extreme/133936-using-wifi-to-see-through-walls The idea of…
metaColin
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How to get the service radio state in iOS

I need to get the current Service Status for the radio signal. I would like to be able to know if it is in one of the next different states ["in_service", "out_of_service", "emergency_only"]. Something similar as ServiceState from the class…
CPI
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GNU Radio and wildlife tracking

I work with wildlife radio transmitters and I would like to build something that will listen for these signals and keep track of what it has heard. The signal is a tone that is transmitted 60 times per minute normally, or 120 if a motion sensor…
John
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GNU radio DQPSK bit error rate

Almost a month ago I started working on a digital communications project which involves GNUradio. And I am severely struggling to get past some errors or mismatches I am encountering in GNUradio. I am desperately in need of some expert help. I made…
anti mage
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GPS tracking system over Radio waves (Ham Radios)?

As I searched in forums I learned that for tacking gps I must send coordinates ovew internet connection or SMS .But as I know we can cominicate via radio waves sending voice ,pics,data .And can I use this for getting data from gps device?Because Ham…
Ercan
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Mobile phone - can it programatically broadcast at a radio frequency?

Is it possible to make a cell phone transmit arbitrary radio waves at a certain frequency? Or does the Mobile OS only allow higher level access? If the answer is 'no' as I expect it is, is there any way to make a phone talk to another electronic…
Antony Carthy
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How to decode Bell 202 signal? (APRS data from International Space Station)

I am having some difficulties in understanding how to decode a Bell 202 encoded signal. How do I do that? I know Bell202 encodes binary data with ones and zeros as 1200 Hz and 2200 Hz. I recorded a radio signal on 145.825 Mhz with a 2Mhz sampling…
Andreas Hornig
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How to find a pipe address using nRF24L01(+) 2.4GHz Wireless Transceiver

I'm trying to figure out if there is an efficient way of figuring out a pipe address of an rf24 radio. In order for two radios to communicate, they have to be on the same channel and have the same read and write pipe addresses. The only approach I…
Robert
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NRF24L01 with ATTiny and Uno not connecting

I have an ATTiny85 connected to an NRF24L01+ module using this wiring diagram: diagram. The ATTiny85 periodically goes in and out of sleep to send some value to a receiver, an Arduino Uno. If the ATTiny is running off the Arduino power supply…
Alex Wulff
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