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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33 views

Arduino respond to input from HT12D data output

Is there a way to connect a data output pin from an HT12D to an Arduino or ESP8266-12e input pin, then sense when the data pin is activated so I can have the Arduino or ESP8266-12e do something like ...
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19 views

RFID-RC522 not working properly?

So I'm working with an arduino uno and I want to read the UID from one card and write it to another with the code of Miguel Balboa but the RC522 doesn't appear to read anything on the serial monitor. ...
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1answer
57 views

Most Efficient & Cost Effective Home Automation Setup

I managed to build a system using Wemos D1 R1 connected to my website to retrieve data to power on or off a 5V relay. Now I would like to expand the project to control all my house outlet. Assuming I ...
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1answer
23 views

What NRF24L01 module is this?

I received my NRF24L01 Module today but I'm having a hard time finding any resources about this particular combination of modules! https://imgur.com/a/HrzpvdR I tried searching up the v200 1812A but ...
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1answer
28 views

How to fix power overload when nRF24L01 connected for voice+gyro based headmouse?

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 ...
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1answer
28 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 ...
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58 views

Battery depleting on second prototype

I am working on a project which uses two 18650 3400ma batteries to power some sensors, an Arduino Mini Pro, an 433mhz RF transmitter and an ESP8266-01. Most of the time the Arduino is in sleep mode ...
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24 views

RF433MhZ - PWM with a motor driver freezes the code

LE: I'm almost certain that the problem is noise from the DC motor. I tried with a spare motor laying around and it had no problem, even if it had no capacitor on it's leads. So I tried adding all ...
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1answer
44 views

ATTINY85 - RF Transmitter (RH ASK)

I am working on a small RF sensor powered by a battery. I used the code from Mr K. (https://arduino.stackexchange.com/a/55516/65870) as base and adapted it to the RH Ask protocol: #define F_CPU ...
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733 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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74 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....
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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 ...
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1answer
20 views

Can I check if a message has been sent successfully using Radiohead_ASK?

I'm new to Arduino programming and I'm trying to get a simple 433 MHz transmitter and receiver module working on an Arduino Uno board. Unsurprisingly, it's not working as expected and I'm trying to ...
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1answer
41 views

Setting up 433 MHz Transmitter and Receiver in the same Arduino sketch using Radiohead

I have set up a 433 MHz transmitter and receiver pair on one Arduino Uno board. Using the RCSwitch library, I could successfully send and receive signals. Using the Radiohead library however, I could ...
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36 views

Operating a 433MHz Remote with Arduino code

I've bought a generic 433MHz remote link for same product. I've been trying to operate it - to embed it in a code to call 4 preset functions. First I've checked my 433MHz Transmitter and receiver ...
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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 ...
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1answer
248 views

SD Card and Lora module arduino uno

Background: When working on the 2 modules separately they were working perfectly. Problem: In the code attached we tried integrating them but Lora wouldn't receive any data unless we commented out ...
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2answers
1k 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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28 views

Arduino encrypted wireless communication [duplicate]

Is there any way or library to communicate two Arduino devices with encrypted connection using modules NRF24L01 or "433Mhz RF" ? Similar encryption like CCMP in Wi-Fi network.
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1answer
113 views

Arduino encrypted Radio communication

Is there any way or library to communicate two Arduino devices with encrypted connection using modules NRF24L01 or "433Mhz RF" ? Similar encryption like CCMP in Wi-Fi network.
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1answer
2k 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> #include <...
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190 views

Wemos D1 Mini using RF with RCSwitch

I’ve bought a RF transmitter and receiver on eBay and I’m trying to get my garage door codes with my Wemos D1 Mini. I’ve downloaded the RCSwitch library, hooked up the receiver to ground, 5v and ...
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99 views

Radio receiver: deep sleep when no byte arrives, and wake up when a byte arrives?

This code works to listen for bytes via radio (with a 433 Mhz receiver module) with the Manchester library and Manchester code, and do an action when certain bytes are received: #include "Manchester....
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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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655 views

2 way RF with Virtual Wire / 315 / 433 MHz

I am trying to figure out how to get 2 Arduinos to talk back and forth from one another using cheap simple RF modules. I have a total of 4 RF modules (2 receiver and 2 transmitter) and 2 Arduinos. I ...
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33 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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1k 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 ...
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172 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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1answer
173 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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27 views

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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1answer
35 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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1k 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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878 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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573 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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109 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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315 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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2answers
3k 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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37 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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92 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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1answer
50k views

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 ...
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144 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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1answer
83 views

RFduino communication capabilities

Is there any way to connect RFduino's via radio frequency? Or any capability to transmit information between RFduino's for distances up to 200 feet? I would like to purchase a dev kit (for RF duino) ...
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1k 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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1answer
103 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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2answers
1k 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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1answer
186 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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1answer
556 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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1answer
978 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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1answer
659 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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2answers
700 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 ...