Raspberry Pi Stack Exchange
Raspberry Pi Stack Exchange

Questions tagged [radio]

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

93 questions
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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 looks like an unpopulated UFL antenna, labelled…
goobering
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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?
Aloha
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Receive FM Radio on Raspberry Pi

I want to feed the FM radio signals to raspberry pi. Having a basic understanding of electronics, I figured out that a FM receiver and an ADC is required. Now I need help on how to proceed with the connections. Is there any kit or module which will…
krthkj
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How does the RF/FM GPIO transmitter hack work?

A while ago, a few guys figured out that they could transmit FM signals using the Raspberry Pi's GPIO ports, and another person realized that he could use the RasPi for controlling his home automation…
Stavros Korokithakis
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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 people still had analog televisions, I noticed that…
Metamorphic
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Is there any way that you can receive radio signals on your raspberry pi?

Since the Raspberry Pi can do frequency modulation by using the PiFM to turn your raspberry pi into a transmitter, is there anyway that you can receive VHF on your Raspberry Pi?
Matt Haywood
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Output power of the Raspberry Pi Transmitter

I have figured out how use the Raspberry Pi to transmit FM Radio, but I also know that this is illegal. All transmitters over 500mW required a licence. What is the output power of the Raspberry Pi (in mW)? It uses one of his GPIO pins to generate…
Fusseldieb
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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 thinking about radio frequencies, Bluetooth or…
carlosgmeyer
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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.instructables.com/id/RF-433-MHZ-Raspberry-Pi/.…
Cody Standridge
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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 as) the handheld remote. The main problem I am…
Georg
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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 Industry Canada and FCC's regulations regarding…
Ethan
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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 better option for simultaneous shooting. The system must…
tiivik
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433 Mhz transmitter on RPI always sending 00000000

I've bought a Realtek RTL2832 DBV for my RPI to read 433 mhz data and a transmitter HM-T433. I can successfully receive messages from two 433mhz remotes with the rtl_433 utility, but when I try to send any data I am always getting readings like [00]…
Ali Cornea
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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/space, for example anechoic chamber), so RF…
PotatoBox
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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 obtain handles for "Service changed"…
Rob van Dijk
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