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.
155
questions
1
vote
0
answers
130
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 ...
- 41
1
vote
0
answers
191
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 ...
- 31
2
votes
2
answers
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 ...
- 21
0
votes
1
answer
1k
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 ...
- 103
1
vote
1
answer
170
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 ...
- 21
1
vote
1
answer
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 ...
0
votes
2
answers
3k
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, ...
- 179
0
votes
1
answer
1k
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 ...
bora
0
votes
1
answer
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 ...
- 111
1
vote
0
answers
147
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 ...
1
vote
0
answers
156
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/...
- 131
0
votes
2
answers
2k
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 ...
0
votes
1
answer
96
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 ...
- 103
0
votes
1
answer
2k
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 ...
- 1
0
votes
1
answer
574
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 ...
- 31
0
votes
1
answer
1k
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 ...
- 101
0
votes
2
answers
4k
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 ...
- 353
0
votes
0
answers
82
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 ...
- 125
0
votes
1
answer
3k
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 ...
- 105
0
votes
2
answers
650
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 ...
user40780
1
vote
0
answers
728
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 ...
1
vote
2
answers
864
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:
...
0
votes
1
answer
46
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 ...
0
votes
2
answers
3k
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 ...
0
votes
2
answers
793
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 ...
- 19
1
vote
1
answer
261
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 ...
- 12.8k
0
votes
2
answers
307
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 ...
- 12.8k
0
votes
1
answer
1k
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 ...
- 515
0
votes
1
answer
855
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 ...
4
votes
3
answers
10k
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 ...
- 539
2
votes
0
answers
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.
...
- 151
2
votes
0
answers
717
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....
- 151
0
votes
1
answer
65
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???
4
votes
0
answers
1k
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....
- 422
0
votes
1
answer
593
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 ...
- 11
2
votes
1
answer
402
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 ...
- 21
2
votes
1
answer
301
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 ...
- 125
2
votes
0
answers
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 ...
- 121
0
votes
1
answer
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 <...
- 123
-1
votes
2
answers
85
views
Problem with combination of Bluetooth and RF 434MHz with Arduino Mega
I want to receive text from Bluetooth from an android phone to Arduino Mega. Then I want to send that text to other Arduino UNO through RF 434MHz.
Here is my code for Transmitter.
#include <...
-1
votes
1
answer
451
views
What is the principle of scanner
I find a 2.4GHz scanner in this web . I want to do same thing in 433 Mhz with SI4463. But I fail to understand it's principle. Who can explain it ? Thanks.
- 123
1
vote
2
answers
728
views
RF signal boosting [closed]
I'm working on a quadcopter project. The quadcopter will be quite autonomous, but sometimes I'll need to send some messages to it. So I built a simple, one-way RF communication system based on two ...
- 436
-3
votes
1
answer
4k
views
Multiple (3) RF transmitters to a single receiver?
How can I have three remote transmitters send distinct signals to a single receiver?
My project requires 3 remote controls, each with 2 inputs.
I need to distinctly identify these 6 signals from ...
- 229
1
vote
2
answers
2k
views
read AM signal only with an Arduino
Some people have managed to send simple AM signals with just a bare Arduino. An example is here.
This works thanks to the fact that the PWM can reach high frequencies and, setting the divider properly,...
- 161
2
votes
1
answer
117
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 ...
- 21
1
vote
1
answer
206
views
How to use setModemRegisters in RF24
The below picture is the introduction of setModemRegisters .
First: What is the mean of ModemConfig* config? I mean: how to write the parameter. Maybe just give a example, and it will be better if it'...
- 123
-1
votes
1
answer
482
views
Speed of comunication by SI4463 under RH_RF24.h
As in this SO question, I use use a RH_RF24.h to control an SI4463. In RH_RF24, there is not anything about the speed of communication. I need the way to control the speed of communication. Because I ...
- 123
2
votes
1
answer
3k
views
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 ...
- 135
0
votes
1
answer
750
views
Can the EWRF 3022 module be directly connected to the pc totransmit data from the pc wirelessly? [duplicate]
In my project I want to connect my pc to an RF transmitter. The receiver will be connected to an arduino on my robot. However most of the RF modules I looked up couldn't be directly connected to my ...
- 135
0
votes
1
answer
1k
views
How to connect an RF module directly to a PC without using an arduino? [closed]
I know that in xbees i can connect the xbee module directly to my pc using the USB explorer. But I'm using the nRF24L01 RF modules. I want to transmit from my pc, via the RF transmitter to my RF ...
- 135