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 ...
user1584421's user avatar
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11 votes
4 answers
6k views

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 ...
Sergey Snegirev's user avatar
9 votes
2 answers
1k views

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 ...
TheAverageGuy's user avatar
8 votes
3 answers
6k views

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 ...
Joel's user avatar
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6 votes
5 answers
22k views

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 ...
Thijs's user avatar
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6 votes
4 answers
18k views

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 ...
Ricardo's user avatar
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6 votes
1 answer
733 views

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 ...
sunny-lan's user avatar
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5 votes
0 answers
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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....
Thijs's user avatar
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5 votes
0 answers
888 views

Is it possible to use the DASH7 protocol in an arduino?

I've been reading about the protocol DASH7 but can't find much documentation about it. There seems to be a protocol stack called OpenTag writen in C and I want to know if there is something familiar ...
Rui Lima's user avatar
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4 votes
3 answers
12k views

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 ...
ahmadx87's user avatar
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4 votes
2 answers
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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 ...
badweasel's user avatar
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3 votes
2 answers
2k views

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 ...
Imaky's user avatar
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3 votes
1 answer
286 views

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 <SPI.h> #include "...
Luis Ramon Ramirez Rodriguez's user avatar
3 votes
2 answers
2k views

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 ...
Rodrigo Hjort's user avatar
3 votes
1 answer
5k views

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 ...
Jason94's user avatar
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3 votes
1 answer
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How to program an nRFL01 RF module that is connected to a pc via a USB to UART/TTL adapter?

In a few of my previous questions I was told that the nRF24L01 RF Module can be connected to a pc using a USB to UART/TTL adapter. After a bit of research I understand that one way to use it is to ...
mjsxbo's user avatar
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3 votes
0 answers
423 views

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)...
Reshef's user avatar
  • 31
2 votes
1 answer
5k views

Sniffing RF signals

I am using an Arduino UNO and an RXb6 (I would link to the data sheet if I could find one) to try to decode a RF Signal that controls a remote outlet. I have the devices connected as you would assume ...
Nick's user avatar
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2 votes
3 answers
302 views

Shift between the carrier frequency of the signal transmitted with arduino and my garage door RC (433 mhz)

I have this 433 mhz transmitter and receiver for arduino. I want to replay my garage door remote control with this transmitter so I reversed the RC (remote control) signal with RTL-SDR/sdrsharp and ...
Melfos's user avatar
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2 votes
2 answers
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Arduino secure two way communication over radio

I would like to implement a secure communication channels between 2 arduinos communicating over 433 mhz radio modules (to be more precise using the barebone Atmega 326 chips). I know that the lack of ...
xmelen's user avatar
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2 votes
2 answers
927 views

Which wireless technology should I use for medium range, many to one, bidirectional communication?

Some clients, let's say 5 <= x <= 10, have to send information wirelessly to a server. Transmission does not need to be reliable (ACK). The range would be between 50 and 100m, and may include ...
Roberto Santalla's user avatar
2 votes
1 answer
315 views

Brownout with Arduino Nano

I'm making an RC car with the Arduino Nano. I'm using RF433 as wireless communication with 2 motors and L293D as the motor driver. I use 4 1.5V batteries to power the Arduin and another 6V battery ...
nedward's user avatar
  • 125
2 votes
1 answer
140 views

Read signal from co-ax cable with ADC

I have an Arduino Uno and I'd like to read a signal from a co-ax cable with it. The cable carries 12VDC (power for other components) along with a signal (of about 1 Ghz frequency). How do I go about ...
Aditya's user avatar
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2 votes
1 answer
437 views

Module and library for self healing large sensor network

I have to build a wireless sensor network with arduinos on my project. It does not need to be a mesh network, but it needs to have self healing capabilities. I would like to use something cheaper ...
Eduardo Santana's user avatar
2 votes
1 answer
265 views

433MHz RF run away TX burst with ATTiny85 IC

I have recently created a sketch for an ATTiny85. My project consists of: 1x ATTiny85 IC only 1x 433MHz RF module => using data pin 2 2x input digital pins => using pin 3 and pin 4 Running at ...
Jonas's user avatar
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2 votes
1 answer
276 views

How to make a pairing and mode button on a remote control receiver

I'm working on a remote control project and have come across many different RF receiver/transmitter modules. Many have a pairing/mode button on the receiver that serves to pair the receiver and ...
user3080392's user avatar
2 votes
1 answer
115 views

How to Fix mouse cursor lag on voice & movement based head mouse in wireless setting?

For my head mouse project which is based on the voice recognition module V3.1 for left click, double click, right-click operations, I am facing a problem. I am using 433Mhz Radio Frequency one-way ...
Nahian Rifaat's user avatar
2 votes
2 answers
2k views

Antenna for ESP32-pico-d4

I am currently playing a bit around with the esp32-pico-4d, it does not have an onboard antenna, so an external antenna is needed, tho I don't know a lot about it so a little help would be appreciated....
Marius Wanscher's user avatar
2 votes
1 answer
409 views

Radio Issues with RF69HW

I am working through this tutorial on using the RF69HW. The RF69HW datasheet can be found here. I am using an Eegoo Uno R3 and yes I am aware that the Arduino is a 5v and the RF69HW is a 3.3v board. I ...
onyex's user avatar
  • 21
2 votes
1 answer
822 views

options for wireless data broadcasting to hundreds of nodes

I would like to build approx 100 arduino devices that can talk to each other, I have a set of constraints that I'm looking to get some insight on : all devices would operate within a 300 meter ...
Simon Kenyon Shepard's user avatar
2 votes
1 answer
118 views

powering RF on GPIO

I have been running a simple RF link between 2 arduini uno recently and everything went faily well. I am now trying a new project with an arduino mini pro (5V/16MHz) and the seeeduino RF link (@315MHz)...
Toluene's user avatar
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2 votes
2 answers
16k views

nRF24L01+ (RF24) radio with Arduino Micro

I purchased several nRF24L01+ (RF24) radios to use with my Arduino Uno and Micro. Using the GettingStarted sketch and nRF24L01+ connected to my Uno, I get nice debugging info in my serial monitor. ...
PhillyNJ's user avatar
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2 votes
1 answer
3k views

Auto acknowledge failed with nRF 24L01+ and Arduino [closed]

My transceivers are running fine. I've written a few code and got them running. Then I decided to check the auto acknowledgement feature wherein we can return data back to the sender WITHOUT manually ...
jar's user avatar
  • 139
2 votes
0 answers
144 views

Arduino NANO RF reciever and Digispark Attiny 85 transmitter issues

I am trying to send RF signal from Digispark Attiny 85 (this one) and receive the signal with Arduino NANO V3.0 ATmega328 (this one). Transmitter and receiver are STX882 and SRX882 (these). Library ...
Le_Peck's user avatar
  • 21
2 votes
0 answers
94 views

How to communicate pt2262 and pt2272 modul

There is a library called Virtual wire. I used it, but without success. I couldn't quite understand its pins. Can you explain? How can I use it?First picture receiver(pc2272) second picture tranmitter(...
koraysonal's user avatar
2 votes
0 answers
137 views

I am trying to control a continuous servo (MG996R) with an RF remote but it's not working

I am trying to control a continuous servo (MG996R) with an RF remote, but it's not working; the servo just spins in one direction. I am new to Arduino so I don't really know if the code is correct. ...
James Lim's user avatar
2 votes
0 answers
172 views

Start VL53l0X measurement failed

The initialization of the ToF fails with this code. I'm trying to frankenstein it with Radiohead RFM69, so far no luck. // rf69_reliable_datagram_client.pde // -*- mode: C++ -*- // Example sketch ...
Mr Joseph's user avatar
2 votes
0 answers
239 views

Creating PPM signal from 4 integrers

I am currently building a MultiWii based drone, I have built the emisor-receptor that interface 4 analog signals(4 potentiometers to control the drone) and it works perfect, the receiver(arduino Nano, ...
Victor Casado's user avatar
2 votes
0 answers
150 views

Radio tx/rx makes my oled screen not work

I've been struggeling with this assignment for school for a couple of days. I have finally figured out where the problem lies. I have an oled screen that is supposed to print out the temperature of a ...
Love.Berg's user avatar
2 votes
0 answers
2k views

Arduino Uno doesn't work as Manchester code receiver

I'm sending some data from ATTINY85 to Arduino UNO using 433Mhz modules. Coding is Manchester using Manchester.h library from here. Transmitting data works perfectly, 433 receiver gets data alright. ...
Em Ka's user avatar
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2 votes
0 answers
751 views

Manchester.h message format

I'm sending some data by 433Mhz transmitter using manchester.h library from here https://github.com/mchr3k/arduino-libs-manchester and I'm trying to wrap my head around message format. In manchester....
Em Ka's user avatar
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2 votes
0 answers
2k views

How do you debug SPI connected devices?

EDIT: Changed the title to better express what I'm after. I've been dabbling in connecting two Arduino Nano 3's with the RFM69HCW breakout for the past 5 days.. but got nowhere. I've followed the ...
niraami's user avatar
  • 121
2 votes
0 answers
282 views

Connecting Pulse Sensor to RFDuino Simblee

I am trying to make a heart rate sensor watch. I am trying to do this using a Simblee (www.simblee.com) and a Pulse Sensor (www.pulsesensor.com) however they will not work! The original code from ...
Brennan Coslett's user avatar
2 votes
2 answers
745 views

Why is the nRF24L01 not working with Arduino Esplora?

I am working on a remote control car from an Arduino Esplora board and the Mega 2650 Board. My problem lies with the Esplora board as the nRF does not transmit like it is supposed to or does not even ...
Galen Nare's user avatar
2 votes
0 answers
48 views

Looking for an existing lightweight RF protocol

I'm currently looking for an RF protocol that doesn't use much power (generally much less than wifi) Something similar to simple AM radio, but with an authentication library readily available. ZigBee ...
Kevin K's user avatar
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2 votes
0 answers
142 views

Rf receiver, change timer

I need some help. I use function rx_setup() оf library VirtualWire.h which is used to transmit information wirelessly. The function use timer аnd there is conflict with any of the other libraries. ...
Supreme's user avatar
  • 73
2 votes
0 answers
2k views

Arduino stops working after some receivings from RF

I made a sketch that receives an rgb code from a remote Arduino using nrf24l01 and while it works for the first receivings then it stops working. I placed a testing Serial.println in the loop to test ...
Christos Mitsis's user avatar
2 votes
0 answers
576 views

Arduino uno RF transmitter and receiver, MYSQL

i tried to connect my arduino uno and ethernet shield with Mysql and everything works fine. Then I tried to connect the RF transmitter and receiver. I use a similar code, but i have problem with ...
Supreme's user avatar
  • 73
2 votes
0 answers
666 views

Mirf not sending reply

I am trying to create a server - node connection with NRF24L01+ chip and Mirf library with interrupts. It seem to work, but server does not seem to get reply from node. If I put it in the loop it ...
WebScript's user avatar
2 votes
0 answers
228 views

Arduino and ATtiny84 w/RF

I'm trying to send data from an ATtiny84 [1mhz] to Arduino Uno using a 433Mhz rf module and Manchester lib. Now I came across a weird problem, no matter what value I transmit, When I receive it on the ...
Ofir's user avatar
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