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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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Arduino nRF2401+ Simple 1 way transmission not working

I am using 2 Arduino nanos and 2 NRF24L01+PA+LNA modules. I have mostly been following this tutorial, and I have verified everything is connected to the correct pins. I have also tried directly powering the nRF2401 modules with 2 AA batteries, as I…
Tony Cicero
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.NET Bluetooth library with radio signal strength

I am currently writing a bluetooth application that the user can set the strength of the bluetooth radio on their PC to change the distance of discoverable devices. I cannot however find any librarys that support this. Is there any libraries? If…
Validus
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Unable to intercept the code of my remote control at 433 MHz with raspberry Pi

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 to test my transmitter and receiver components and…
jay
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Is there possible to stream infinte data over SPI using DMA on STM32F3?

I'm developing a RF modem based on a new protocol, which has a feature of streaming 96 Bytes in one frame - but they are sent on and on, before communication ends. I plan using two 96 Bytes buffers in STM32 - in next lines I will explain why. I…
Sink
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How to determine bluetooth hardware classes on Android devices?

I know this is a hardware question, but I am still hopeful I can get a little help. The question is: How can I figure out what class (hardware specification) a bluetooth chip is within an android device? I would like to use class 1 radio's in some…
ahodder
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Microsoft Bluetooth Low Energy Advertisement

While I'm performing a Bluetooth Low Energy scan, I faced two advertising packets that I don't understand. These two packets are respectively : 0x1eff060001092000f4a6326eb7f6dd2338b0b3502d434ffb6d5b89ae3082ab and…
sc4re
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How do I know the physical NFC antenna location in a device?

I am trying to read NFC tags but the antenna location is different for different mobiles. Users typically don't know where exactly to tap the phone on a tag. So I want to know the location of the NFC antenna within my app. I would then want to…
sravani
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Radiohead RH_ASK.h interfering with analog write to motors

We try to remote control an elegoo robot car, (https://www.elegoo.com/product/elegoo-uno-project-smart-robot-car-kit-v1-0/) with a RF-433 transmitter and receiver. The car has 4 dc motors, controlled by an L298N controller and the motors are powered…
Casper Mariager
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BBC micro:bit - Radio string transfer random carriage returns

I have two BBC Micro Bit and using Radio function to transfer data from one slave to the master Micro Bit. When the data is transferred I am getting random carriage returns, I am not sure what is the problem, I have tried to strip any random CR etc,…
Brendon
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Wirelessly Change XBee Channel In Noisy Environment

I have a XBee Radio on a device that we are trying to get to communicate with another XBee Radio 5' away (attached to PC). However, there is a lot of noise on the channel and the XBee is receiving a lot of gibberish only on that particular channel.…
biggi_
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Control LIVOLO switch with raspberry pi

I am using 433mhz module to control light switches with my raspberry pi by using 433utils library. I was trying to control livolo brand light switches but it wont work with that library. in this github there is a source code that should do the work…
Jango Flaisher
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F#/"Accelerator v2" DFT algorithm implementation probably incorrect

I'm trying to experiment with software defined radio concepts. From this article I've tried to implement a GPU-parallelism Discrete Fourier Transform. I'm pretty sure I could pre-calculate 90 degrees of the sin(i) cos(i) and then just flip and…
Jason Kleban
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Using cc2530 radio with contiki

I am trying to build a port for Contiki on my lpc1347 board. I have set up the mcu libraries and makefiles, all that is left is to add the radio support. My goal is to use a cc2530 radio that I have, the problem is i do not know much about this. I…
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Should I use Mutex OR Critical Section for Windows Mobile RIL

I am using Radio Layer Interface (RIL) Native APIs in Windows Mobile application. In this API, the return values / results of most functions are not returned immediately but are passed through a callback function which is passed to the RIL API. Some…
Afriza N. Arief
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is there any way to convert gsm radio frequency to fm radio frequency?

I want to make an application that play fm radio in iphone but from searching i found that there is no hardware - fm receiver in iphone to play FM directly(offline). so I want any solution that convert gsm radio frequency (900 Mhz - 1800 Mhz :india)…
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