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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23 views

Can I use an RF Receiver to any pin on an Arduino?

I have a project that uses a nodemcu and it includes an rf receiver, I created the pcb board already etc etc... so I've already chosen D7 (GPI013) before reading on connecting the rf receiver and ...
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30 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)...
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33 views

Is it possible to transmit radio signal with cheap 433Mhz transmitter as strings and receive it with an RTL-SDR

I have these Arduino transmitters and receivers. They are very common. I am just trying to transmit a "Hello" Message using this code. #include <RH_ASK.h> #ifdef RH_HAVE_HARDWARE_SPI #include &...
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Arduino Setup for RF Transmit and Receive, IR Receive, WS2812 LEDs and a Piezo Speaker

I am new to Arduino and microcontroller in general and just finished one Project (TonUINO - a DIY music box for kids). Now I am planing and working on my next project. A IR shooting range. The guns ...
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31 views

Is this the right way of using an RF communication?

I have a 433Mhz Superheterodyne receiver and a hand set remote of similar frequency, I'm using the RC-Switch library and I couldn't find a better way than using the "numbers" that I'm receiving like ...
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44 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, ...
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Arduino NRF24L01 transceiver reading trouble shooting

I bought a NRF24L01 from Amazon a few days ago but am having trouble getting readings. When ever I open my serial motor instead of a message I get a stream of "?"s I know that I did something right ...
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90 views

Ultra Long Range (200-500km) Arduino Communication using a Gibson Girl

I came across this article on Hackaday showing a simple AM transmitter sending a morse code tone 700km! I'm looking into a EPIRB for myself while deep in the bush / outback hunting or camping, just ...
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30 views

RF Rx with NodeMCU error

I am using RF Tx with Arduino Uno and Rx with NodeMCU. I use RF switch library. At the recipient side if I use an Arduino Uno MCU. I can receive the output, but with NodeMCU I have a blank serial ...
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47 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 ...
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87 views

Decoding RF Signal

I have a motorized curtain and I'm trying to understand its rf control signal in order to control it from my arduino. I got the times, and checked the code is not static. I believe it has some kind ...
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625 views

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 ...
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297 views

How to pass 2 parameters with RCSwitch library?

I'm learning Arduino's world, but knowing very little about C and C++. I'm trying to achieve a little RF transmitter which should send the temperature and humidity from a DHT-11 sensor to a ...
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67 views

Can you use a RF remote with nRF24L01 and Arduino?

I recently bought a 10 pack of RF transceivers (nRF24L01). I wanted to know if its possible to pair one with an RC drone controller. I can't seem to find any ways to do this through google. If this ...
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557 views

Rc car controller using the RC-switch library

simulate this circuit – Schematic created using CircuitLab (Newbie in arduino) Hi so i have a project which involves creating an rc car which uses the 433Mhz rf module and an arduino nano with ...
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381 views

SIM800C, CPIN: NOT READY (ERROR CODE : +CME ERROR: 10)

I'm using a SIM800C module, and usually it works fine, but lately it has started giving the error "+CPIN: NOT READY" with ERROR CODE : +CME ERROR: 10(SIM NOT INSERTED). As soon as I get this message, ...
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352 views

Library to send large amount of data over 433 MHz

I am trying to communicate between two Arduinos using two RF 433 MHz modules (transmitter receiver). I found that the library Wildewire.h allows a maximum of 77 bytes so is there any another ...
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1k views

ATtiny85 (Digispark) with 433mhz RF transmitter not working

I have the following components: ATtiny85 Digispark 433mhz Mini Low Power RF Transmitter I got a communication flow transmit/receive working between two Wemos D1 and like to outsource the ...
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83 views

data streaming using Bluetooth + RFduino

I am trying to send ECG data using RFduino. I am using two RFduino modules. The transmitter module is using the device code while the receiver is using the host code. I have common baud rate between ...
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68 views

Set up mesh network with RF Transceivers

I would like to set up a mesh network of Arduinos with the following features/capabilities: No master node Arduinos capable of bootloading other Arduinos through RFs Capable of communicating over TCP/...
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746 views

Can a cheap RF module be used for two way communication

Can a cheap RF(transmitter and receiver) module be used for two way communication, not at the same time of course but for example arduino A sends string to be printed on lcd the arduino B receives it ...
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45 views

Change RF Receiver Frequency by Antenna Length

This may be a very stupid question, but I have got me one of those cheap 433 MHz RF modules for the Arduino. I'm wondering if I can vary the receiver's frequency by simply changing the length of the ...
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458 views

What is wrong with my code? Did you forget '()'?

#include <SimbleeBLE.h> // constants won't change. They're used here to set pin numbers: const int ButtonPlayPause = 15; const int ButtonNext = 12; const int ButtonPrevious = 11; const int ...
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218 views

RF transmitter with external 8-12v power not working properly

So I have this pair of transmitter and receiver RPI is powered by USB from laptop Transmitter is connected to Attiny85 being interfaced from RPI at 3v3 Receiver is connected to Arduino at 5v If I ...
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494 views

Attiny85 not able to understand data from 433Mhz using VirtualWire.h

The basic plan is to have a Attiny85 pass information from a 433Mhz RF module to another chip/Arduino via I2C using VirtualWire and Wire libraries. I have been able to make this system work on their ...
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2k views

Powering an Arduino Mini Pro using a CR2032 battery as a remote control

I'm looking into making my own remote control using an Arduino Mini Pro and some RF transceivers. The receiving end won't be a problem, but the remote will. I want to make it as small as possible and ...
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42 views

Using servos in voltage sensitive circuit

I'm currently using a breadboard Arduino Uno clone. Basically a Atmega328p powered using an L7805 linear regulator with a 10uF capacitor on both the input and output. The Atmega328p is connected ...
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1answer
828 views

RF receiver for integer only, how to cast uint8_t to int?

I'm using the RadioHead library with ASK Driver to transmit/receive data with generic RF modules. It works fine, but I'm lacking some knowledge in programming the code to use the data received. Most ...
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275 views

Need help with nRF24L01 and Arduino decoding and receiving [closed]

A month ago I bought a Chinese drone, remotely controlled by: SM-217-BKT v5 controller, which uses 2.4GCOB-1A transmitter. My idea was to drive a drone with its "memory", I mean: Start the drone and ...
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409 views

How to use an Arduino to measure speed of rocket

I am not very experienced with Arduino and I am trying to learn it. I was wondering what is the easiest and most effective way to calculate speed and log it every second so to say. This would be ...
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540 views

Sending and receiving data using 433 Mhz from Arduino to Arduino

Following this tutorial: https://tutorials-raspberrypi.com/let-raspberry-pis-communicate-with-each-other-per-433mhz-wireless-signals/ I was able to easily send code from one Raspberry Pi Zero to ...
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2answers
444 views

How to make two WIR 1186 RF transceivers communicate over serial communication?

I want to have two RF transceivers communicate, one as transmitter and one as a receiver, for longer distances. For that I'm using WIR 1186 RF modules with Arduino. Pin connections are as below: ...
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37 views

RF receiver becomes weakened after motor turns on

I recently bought a simple SMAKN 315MHz RF receiver and transmitter, and I got everything working so that the transmitter transmits the value of a joystick, and the receiver receives that and uses it ...
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2answers
960 views

NRF24L01 receiving even if no data sent

I am using nRF24L01 to communicate between two micro controllers. Both are Arduino Uno. The question i have here is , even if i do not send any data from sender to receiver , the receiver device is ...
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614 views

Arduino UNO/Nano communication with SP1ML-868 module

Good evening, I'm trying to establish serial communication between an Arduino UNO/Nano (ATMega328P) and a SP1ML-868 RF radio module (http://www.st.com/en/wireless-connectivity/sp1ml.html). I can talk ...
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1answer
154 views

Two nRF24L01 radios per Arduino

Due to the results of my previous post (Slower nRF24L01 round trip delay than expected) I found out that it will be quite difficult to reach my latency requirements. I am thinking about using my own ...
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177 views

Possible reason for broken Uno

Yesterday I wrote in a comment that I didn't break much, except a LED and a LED matrix. However, exactly yesterday I think my Uno gave up, since I cannot upload a sketch anymore (timeouts). For the ...
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701 views

RadioHead Library custom configuration for RFM96 LoRa

I have a pair of Adafruit RFM96W LoRa Transceiver Breakouts and want to use them with the RadioHead library. My pair of radios works if I use the example sketches from the adafruit tutorial, but I ...
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601 views

How to control continuous rotation servo via HC-12 rf module

I am working on a project to wirelessly control a continuous rotation servo...something like a wireless vending machine. The problem I am having is controlling how many revolutions the servo is ...
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4k 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 ...
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877 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. ...
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450 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....
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1answer
55 views

Replacing BT module with 433 MHz transreceiver module

I have made a prototype where I can send data from one arduino to another via Bluetooth(hc-05), they are working fine, but now I want to replace the BT module with RF module, how can I do that???
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747 views

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....
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460 views

Char transmission using Virtualwire RF signal

This is a really basic problem, but I haven't been able to resolve it myself and would really appreciate the help. So I've been struggling for a few weeks now to set up RF communication between two ...
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1answer
252 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 ...
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1answer
185 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 ...
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743 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 ...
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274 views

How to operate multiple relay boards using a single RF Remote?

I am working on a Home Automation Project using RF technology. I have to operate more than one switch board or let say more than one relay board, using a single RF remote. Is it possible? And if yes, ...
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1k views

How to use get_properties to get RSSI in RF24?

As picture below, how to use get_properties ? I fail to understand AN625, how to use get_properties to get RSSI ? Adding source code based on RH_RF24 functions. #include <SPI.h> #...