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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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47 views

Can I just use one Arduino in a receiver/transmitter circuit?

I am trying to build a system to control lights remotely, but I am a student and am operating on a tight budget. Is there any way I can have just one Arduino along with a receiver and transmitter (I ...
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1answer
62 views

Select pin to connect RF receiver

I use the RCSwitch library receive signals with a RF receiver. I really need to change the pin the receiver is connected to on my Arduino Uno. What should I change in my sketch? What pins can I ...
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1answer
54 views

Node MCU not functioning correctly

i have a node mcu and i uploaded one example code to test it for rf signal decoding it worked. so after that i have written a code based on that and when i uploaded the code my node MCU suddenly isn't ...
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1answer
78 views

Decode rf remote signals with ESP32 or node MCU?

I'm trying to decide my rf remote signals using ESP32 or node MCU. I have tried with Arduino and was successful but for some reason it is not working on either ESP32 or node MCU even using the same ...
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1answer
53 views

How would one send radio signals from Arduino at a non-standard frequency

TL;DR: How would one send a fixed radio signal at 447,54MHz with Arduino? Background: I recently purchased a (receive only) SDR and recorded my garage door fob. I found it sends a fixed signal at the ...
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22 views

Directly synthesising an OOK modulated LF signal using a CSV file

I'm looking to transmit some data (CSV files) from a measurement instrument underground to a receiver on the surface. I've learned that in order to penetrate the limestone, low frequencies have to be ...
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1answer
120 views

RF sniffer with Arduino

Hello programmers out in the world. I am doing a capstone project for an RF sniffer to capture RF signals from Key fobs within an OEM manufacturing plant. I want to be able to decode this RF signal to ...
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0answers
49 views

I am trying to control a continuous servo (mg996r) with an RF remote but it's not working, I'm not sure what's wrong

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 don't know what's wrong. I am new to Arduino so I don't really know ...
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44 views

How can I get an Arduino Uno run the Feather9x_RX example?

How do I get this example to run on using an Arduino Uno. I've updated RFM95_RST, RFM95_CS & RFM95_INT to the relevant pins (2,4 & 3 respectively). This is the output on the Serial Monitor ...
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3answers
62 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 ...
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1answer
31 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 ...
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1answer
110 views

RadioHead library change the state when a new message is received

I would like to control a toy car from the server. I use RadioHead library for communication and it works fine. The application running on the server side is as follows. #include <...
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1answer
309 views

Looking for information and/or how to connect the RF433Mhz module (WL101-341/WL102-341)

I'm trying to find information about this 433MHz RF module: QIACHIP Apparently it can be connected to an Arduino with the RadioHead library, but I don't have diagrams of how to connect them togheter ...
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1answer
190 views

Rc switch library display received values only one times using serial monitor

I use Rc switch library to transmit and receive data. It works fine. The part that sends the data is as follows : #include <Arduino.h> #include <RCSwitch.h> RCSwitch transmitter = ...
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0answers
50 views

How can I interface, received HC-12 data and transmit the received data using sx-1278 RF-module in arduino-UNO?

I am currently working on a project, where I need to send data from first unit to the second unit which is a few km apart, so I decided to go with hc-12 RF module as it covers upto 5km. Then the data ...
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0answers
39 views

esp-01 with rf receiver keeps crashing

SOLVED: after may hours of testing i have solved the problem. it turned out to not be a software issue. the power supply i was using did not have a flyback diode and thus caused large voltage spikes ...
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0answers
41 views

legality of streaming data on 868 or 915 Mhz in EU/US

From what I read about duty cycles in the EU there is a 10% limitation (even less in some sub bands). The modules I found have a max. rate of 300 kbps. Even if you max out the duty cycle that would ...
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2answers
78 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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0answers
132 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
69 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
66 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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0answers
61 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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0answers
73 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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2answers
64 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
72 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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1answer
166 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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2answers
616 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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1answer
229 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
341 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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0answers
86 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 ...
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1answer
249 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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443 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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0answers
241 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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1answer
493 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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0answers
57 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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0answers
263 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
532 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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1answer
43 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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0answers
167 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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0answers
513 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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0answers
40 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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0answers
108 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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0answers
166 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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2answers
2k 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
866 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
113 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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1answer
1k 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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2answers
2k 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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1answer
884 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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1answer
3k 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 ...