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Questions tagged [rf]

Radio Frequency. Typically used to refer to the radio portion of the electromagnetic spectrum which is used for wireless communication. Strictly speaking though, RF can refer to any oscillation (electrical or otherwise) at the associated frequency.

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Whats the difference between RF options (wifi, xbee, NRF24L01)

When doing RF, you have many options. Three of the most basic are in the title box WiFi Xbee NRF24L01 What are the practical differences in using them. What is the purpose of each other and the pros and cons. What would you use depending on the…
user1584421
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Choosing wireless tech for lowest possible lag

I am drafting a pub quiz project, where the Referee gives a signal and multiple players push their buttons. The first to push wins the right to give an answer. I want all buttons (referee's + X players) to be wireless. Since the best quiz players…
Sergey Snegirev
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RFID/NFC (13.56 MHz), is it possible to send raw bytes and receive response?

I'm trying to implement a card reader (i.e. credit cards) for shopping purposes, and AFAIK those cards are ISO 14443-A compliant (Mifare Classic 1K). I already made an Android app that can send custom APDU to read specific sectors by using raw…
TheAverageGuy
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Manchester Library Won't Compile for Attiny85

I am creating a wireless sensor using an Attiny85. I want to send the data to an arduino uno, so I purchased the 315mhz rf link kit from spark fun. Since the Attiny85 does not have a TX I decided to use the Manchester library however it won't…
Joel
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RF remote control using VirtualWire on ATtiny85 running at 8MHz on internal oscillator

I'm trying to make an RF remote control using ATtiny85 running at 8MHz on internal oscillator, this cheap RF 434MHz transmitter module (like the one below), and VirtualWire lib, but had no success so far. So, before I go any further, is it…
Ricardo
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Problems with transmission between ATtiny85 and Arduino Uno with 433MHz RF modules and Manchester

I am trying to transmit from an ATtiny85 running at 16MHz internal clock to an Arduino Uno with the Manchester Library. The problem is that the Arduino is not receiving any data. I have hooked an oscilloscope to the ATAD/DATA pin of the transmitter,…
sunny-lan
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433mhz range optimization

I would like to get the best range possible from my 433MHz modules. After A LOT of searching and reading, I'm convinced I should be able to cover 10m indoors with free line of sight. [update] After some tips in the comments I changed a few things.…
Thijs
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Manchester 433MHz Nano to ATTiny85

My transmitter is a Nano, the receiver is a Tiny85. I use a Logic Analyzer to check if stuff is moving, I can clearly see data coming in at the receiver. The receiver does not 'decode' the data, man.receiveComplete() is never True so in the end…
Thijs
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How can I get ultra clean dc wall power for my arduino project?

I'm doing an rfid project that requires a read range of at least 5 inches or about 13cm. I'm using a nano with a usb port, a rfid reader from priority 1 design and a large antenna. The problem I'm running in to is that when I power the project from…
badweasel
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STM32 Nucleo-L432KC can't send data to Arduino Uno via nRF24L01 module

Hello everyone. First of all, I know you're going to tell me to send my question on the stm32duino forum. But I tried to enter the stm32duino forum and I didn't succeed (I think their forum is closed). So I'll be happy if you could try to help me…
Reshef
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Attiny85 and 433Mhz RF

I have this cheap RF link that I had working with the Arduni UNO, but I wanted to make it smaller and ATTiny85 should do the trick. The RF module is connected (data pin) to PB3 on the ATTiny. But I am having some problems. It does not work, and I…
Jason94
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Decoding 2.4G RF remote controller?

There is tons of information on how IR remote controls work and how to use an Arduino to decode those signals and use any IR remote to suit your project. But I couldn't find much info about 2.4G RF remotes. I want to control a string of addressable…
ahmadx87
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rf24 change order of data

I'm using two Arduinos with the rf24 modules. I want to control a process with those, but for now I'm just checking the connection. This is the code of the master: #include #include "nRF24L01.h" #include "RF24.h" unsigned char…
Luis Ramon Ramirez Rodriguez
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RF 433 Module with VirtualWire: transmit and receive using the same Arduino board

I was wondering if it was possible to work, in the same Arduino board, both Transmitter and Receiver RF 433 MHz modules. Is it feasible? Here is the schematics I tried: 1) a pushbutton toggles a state value (0 or 1) and triggers the RF transmitter…
Rodrigo Hjort
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Wirelessly communicate between two Arduinos without router

I want to "connect" two Arduinos, without using wires. The range is ~0.2 miles (300 meters). Using Google, I saw too many options. The idea is to build something like a beacon, so the bandwidth can be small. I want to send 32 or 64 bits/second of…
Imaky
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