Questions tagged [nrf24l01+]
An ultra low-power transceiver for radio communication in the 2.4GHz ISM band (Industrial, Scientific, and Medical). Commonly used by tinkerers because of its low cost and its easy to use SPI interface.
271
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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 ...
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5
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Same structure taking different memory space on Uno and NodeMCU ESP8266, leading to data corruption when transferring via nRF24L01+
I'm trying to transfer data between a Arduino Uno board to a NodeMCU ESP8266 board, using nRF24L01+ transceivers module and RF24 library on both side. The data I'm transferring are stored in a struct ...
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3
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nRF24L01 pipe question
I am looking through the example code found here. I know there are 6 pipes that the nRF24L01 module can use but I've been searching the internet for the address designations and have been able to find ...
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1
answer
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Increasing payload size above 32 bytes using nRF24L01+
I tried to modify the example in the following page, by replacing the given string with a 56 bytes one after making all the suitable changes to read(), write() and max_payload_size(increased to 64 ...
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votes
5
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OTA updates for Arduino using nRF24L01+
Is it possible to send OTA updates to Arduino via nRF24L01+ module?
Here are my findings:
Here is an instructable explaining how to program Arduino wirelessly but this thing uses a BT module which ...
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5
votes
3
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nRF24L01+ RF24 library - can send but can't receive
I'm prototyping out a board with temperature, humidity, windspeed sensors, and using an NRF2401+ board to send values to a Raspberry Pi base station that will record the data.
Using a Leonardo clone ...
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5
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2
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Sending large structs via nrf24l01 leads to cliping of some structs members
I started with building of the wireless temp/hygro/other values probes. I use 2 arduinos, both with nf24l01+ wireless transceivers, library used is rf24.h (https://github.com/maniacbug/RF24). ...
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1
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Trouble connecting Arduino Pro Mini (Atmega328, 3.3V) to nRF24L01 over SPI, receiving all 0 values when I use radio.printDetails();
I am trying to connect my Arduino Pro Mini 3.3V to an nRF24L01 transceiver and cannot see what I am doing wrong. I've checked my wiring a million times because the problem hints there is an invalid or ...
5
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0
answers
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nRF24L01 continuously reading closed pipe
I am testing communication between two nRF24L01 modules. The receiver is getting the transmitted message but is also continuously reading (null) data from a closed pipe? I am using the RF24 by TMRh20 ...
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4
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1
answer
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NRF24L01 only receiving zeros
I'm attempting to transmit very simple data across some NRF24l01 modules for testing purposes, and I've been following a YouTube guide.
Here is my code:
Trasmitter:
#include "RF24.h"
#include <...
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4
votes
0
answers
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Arduino UNO with NRF24l01 + touch screen [closed]
I have an Arduino UNO, a NRF24L01 as receiver (receive data from elsewhere), and this touch screen from Adafruit for display and control.
The Adafruit TFT is a shield so it fits the UNO perfectly.
...
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3
votes
2
answers
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Not able to make my NrF24L01 work
I have been trying to make my two Nrf24L01 wireless model work for few days now, to do so I follow the tutorial in the following link.
http://arduino-info.wikispaces.com/Nrf24L01-2.4GHz-HowTo
I ...
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3
votes
1
answer
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Nrf24l01 smd pcb placement tips
I am working on pcb design with nrf24l01 smd. I have read somewhere that nrf24l01 module has problem while communication when it is placed with its antenna within the pcb. I want my module to be ...
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3
votes
1
answer
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NRF24 and Arduino Nano Every usage
Im building an RC car project and using 2 NRF24's for communication. I own an Arduino Uno, Nano and Nano Every. The NRF's work great with the Uno and Nano in any combinations but using a Nano Every ...
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3
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Can I compile a sketch for my attiny85 without an arduino board?
I have a lot of Raspberry Pi's laying around, so I want to use those to program my attiny85 chips. The problem is that most of the code examples, libraries, and documentation out there assume you're ...
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1
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Reading a .csv file element wise
I'm fairly new to arduino programming and C/C++. I would like to read a .csv file element wise, and send each element via. a nRF24L01 tranceiver to a raspberry pi. Right now I'm able to read the .csv ...
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3
votes
1
answer
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How do I use a transmitter and receiver to send string messages conditionally to a receiver?
I'm working on a project to build a plant monitor that works from the outside with Arduino that picks up light and water values from it's environment then uses a nRF24L01 with an antenna and I've come ...
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3
votes
1
answer
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Arduino Nano nRF24L01+ DFPlayer Mini SPI Problem
I'm working with an Arduino Nano board clone (CH340) on wireless control of DFPlayer Mini, transceiver sending a Struct variable with MachinePrefix (just in case), sound type (I have more folders by ...
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3
votes
1
answer
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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 "...
3
votes
1
answer
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Using signal strength feature of nRF24L01 module
This is a walkie-talkie project and this circuit really worked, voice can be transmitted from one nRF module to another nRF. Additionally, I want to observe how well the signal strength is, by ...
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3
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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 ...
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3
votes
2
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SPI with a level converter in the other end of connection
I have an Arduino MEGA hooked up with a NRF24L01, and working nicely, talking with another Arduino Uno. It works as described, power supply to 3.3V, and SPI lines (MISO,MOSI,CLK) connected directly to ...
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3
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2
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Using ATtiny85, NRF24L01+, DHT2: can't get data from DHT22
I am trying to make a sensor that gets temperature and humidity values from a DHT22 and send it through NRF24L01+ to a Raspberry Pi 2 Model B.
To connect NRF24L01+ to ATtiny85 and to free two pins ...
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3
votes
1
answer
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Connecting nRf24L01 to Atmega328PU with external 8Mhz Crystal problem
I am trying to fix the problem of communicating between two nRf24l01+ together, one connected to Arduino Uno and another connected to Atmega328PU with 8Mhz external crystal.
The bootloader on ...
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3
votes
0
answers
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Raspberry pi pico (Arduino core) not initialising SPI correctly for NRF24l01
I'm working on a project where i have a Raspberry pi Pico connected to a NRF24l01+ to send some data.
However i'm not recieving any data on the reciever and i think that its because the SPI bus is not ...
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3
votes
1
answer
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Arduino hangs / freezes - can't figure out why
I am building a remote controlled boat. My remote project freezes after an arbitrary amount of time. The serial stops output, the OLED doesn't update anymore and instructions are not send / received ...
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3
votes
0
answers
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nRF24L01+ problem with receiving response
I'm sending currently data from a Raspberry to an Arduino, but I have a problem with receiving response from the Arduino back to the Raspberry:
Sent the message: ['H', 'i', '.', '.', 'A', 'r', 'd', '...
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3
votes
0
answers
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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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4
answers
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Trouble with NRF24L01
I've been trying on and off to try and get my nrf24l01's working for some time and they never seem to work. Right now I'm just trying to turn a led on and off over the radio and it isn't working.
...
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2
votes
2
answers
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Understanding NRF24L01 specifications
I was reading this tutorial about the NRF24L01 and came across a few terms which I did not clearly understand.
It uses the 2.4 GHz band
Does this refer to the frequency of the EM waves that the ...
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2
votes
1
answer
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Dereferencing char into a struct
I am sending some data over an NRF24 link, using the RF24Network library. So far I have only sent numbers, now I also want to send a string, so I have set up my payload struct as
struct payload_t { ...
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2
votes
2
answers
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Need help understanding how RF communication works with 2 arduinos
I have two arduinos (uno) and I would like to send the results of a key press on a 5X4 matrix pad to the other arduino. The matrix keypad works great. I can identify which key was pressed with a ...
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2
votes
2
answers
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Library using another library
I'm writing library for smart home arduino DIY project.
i want to use another library(not written by me).
here is the code:
boiler.cpp
#include "Boiler.h"
Boiler::Boiler(int pin)
{
_pin = pin;...
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2
votes
3
answers
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Powering Arduino Mega 2560 from a Raspberry Pi Usb
I have a Raspberry Pi B+ running 7x24. I have to connect an Arduino Mega 2560 to its USB. The Arduino has only one nRF24L01-PA-LNA powered from its 3V3.
Can I power the Arduino from the Pi's USB?
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3
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how to communicate MPU-6050 ( on arduino micro) wirelessly using nrf24l01 to arduino uno? [closed]
I have an Arduino Micro and MPU-6050. I'm trying to transfer the data obtained from the MPU-6050 wirelessly to my computer using an Arduino Uno at the other end. I'm not sure how to make this happen.
...
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1
answer
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nrf24l01+ with antenna problem
I just got 4 nrf24l01+ modules with the external antennas, but I'm not able to make them work.
I'm using arduino nanos and MySensors to create a gateway and a sensor.
The funny thing is that when ...
2
votes
1
answer
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RF24 tranceivers: trouble with two way communication
I am using RF24 modules with my two Arduinos Leonardo with the RF24 library. My goal is to be able to press a button on the first Arduino which will light up an LED on the second Arduino, and be able ...
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2
votes
1
answer
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Run code via NRF24L01+ command "dynamically"?
I'm trying to make a home automation setup but I'm having a bit of trouble.
I want to be able to send commands of varying sizes to my arduino, separated by "|" and after receiving it completely it ...
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2
votes
2
answers
570
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Portable power for an UNO with a nrf24l01+ attached?
Okay so I have an UNO that has an nrf24l01+ attached. I want it to be completely wireless so free of the 5v USB power and the 12V wall plug. In this case what can I use? I do not wish to plug the ...
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2
votes
2
answers
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Changing SPI ports on an Arduino
My end goal is to read information from an nRF24l01 module connected to my Arduino UNO R3, and generate an interrupt whenever a message is sent to the Arduino.
Now, I have read that for Hardware ...
2
votes
1
answer
116
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SPI.begin doesn't work after tristate
I am working on a ultra-low power project using an ATMEGA328P, a nRF24L01 and a 0.47F super-capacitor to measure various sensors akin to Gammon's solar power project. I have been having problems with ...
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2
votes
2
answers
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Arduino with NRF24L01. Getting correct data from unkown transmitter
I want to use my Arduino with this: VAC8010F measure unit. It communicates with NRF24L01. The problem is I simply don't know which band or information it is receiving. Can somebody help me with this?
...
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2
votes
2
answers
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NRF24L01+ (TMRH20 library): Receiver gets blank data
I am working on sample Arduino project for communication over NRF24L01+ (TMRH20 library), everything is working fine with my example except one issue my Receiver gets message but that message is blank....
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1
answer
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Printing transmission data from nRF24L01+
I have a beginner's problem. I have 2 nRF24L01+ devices. They are communicating with each other great, and I can talk with the nRF via SPI.
The problem is I want to display, on the serial monitor, ...
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2
votes
1
answer
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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 ...
2
votes
2
answers
2k
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Motor shield and wireless transceiver compete for same pins
I would like to use these 2 components with an Arduino Uno:
Arduino Motor Shield R3
nRF24L01 2.4GHz Wireless Transceiver
I use Stepper for the motor shield, and SPI + RF24 for the wireless ...
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2
votes
1
answer
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NRF24L01 PA+LNA With Arduino
I am using the NRF module for remote communucation.I have been many research about nrf but my nrf module is not working This is my tranmistter code:
#include <SPI.h>
#include <nRF24L01.h>
#...
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2
votes
2
answers
519
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nRF24L01 - leaves out end characters during transmission
This is my Master's code.
#include <nRF24L01.h>
#include <RF24.h>
#include <RF24_config.h>
#include <SPI.h>
RF24 radio(7, 8);
const byte address[6] = "00001";
char text[20] =...
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2
votes
1
answer
10k
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How to connect NodeMCU to NRF24L01
I need to connect NodeMCU and NRF24L01. where I'm receiving data from another NRF24L01 Transmission. I managed to connect to a WiFi network but the data receiving is not taking place as expected. Here ...
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2
votes
1
answer
338
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nrf24l01+ contradicting itself?
I have recently bought a few of these chips on boards along with some "adapter boards" which supposedly regulates the 5v to propper 3.3v with the required capacitors.
So power supply shouldn't be a ...
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