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.

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40 views

Sending an Array using nRF24L01

im currently trying to setup a wireless Controller using 2 Arduinos that communicate with 2 nRF24L01 Modules. Unfortunately one Arduino died while testing something and therefore I can't test if the ...
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75 views

how to detect when a transmitter is turned off?

Using the nrf24l01 wireless module I want to control a led with the sketch below. The transmitter automatically sends data at intervals of one second continuously and when the receiver counter reaches ...
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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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39 views

nRF24L01 programming issue

I'm new to nrf24l01 . I have a two nrf24l01 they both works very well ,I tested them with a simple LED blinking program. Now I write a program for both transmitter and receiver to just send message ...
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No communication between two stations that include Arduino Nano and nRF24L01

I'm struggling to establish a link between two Arduino Nano using nRF24L01 (the module that contains PA and LNA). I assume I made a coding mistake (May be in the setup method?), and I need help in ...
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87 views

NRF24L01 receiver flooded with data packets

Following this tutorial I attempted making an NRF transmitter and receiver using an Arduino Nano. On the transmitter side I used the following code: // SimpleTx - the master or the transmitter #...
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1answer
309 views

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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466 views

RaspberryPi Pico SPI and nrf24l01

I am programming a RaspberryPi Pico with the Arduino IDE. Works pretty well, but now I try to control an nrf24l01 module. My code compiles but I do not know on which pins the SPI bus has to be hocked ...
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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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1answer
45 views

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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187 views

Using BLE via NRF24L01 to communicate with Android phone

I have been going through a tutorial about this, based on the example code for the "BTLE" Arduino Library. This is my program: #include <SPI.h> #include <RF24.h> #include <...
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How can I send 2 orders using nRF24L01

My project is to control a servo with a joystick using nRF24L01. I have this code working well, but the problem is that I want to add a lamp in the receiver side, and a switch in the transmitter side. ...
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148 views

Message is sent multiple times from one arduino to another, using nRF24L01

I am trying to build a bidirectional communication channel, using nRF24L01 and two arduinos. The message is introduced using a button (but) in Morse code, decoded and then sent when another button (...
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Communication code between nrf24l01's suddenly not working. Hardware is fine

I specifically had saved code for the purpose of checking the connection, but it doesn't seem to work anymore. All the examples from this simple tutorial work, so it can't be a hardware issue. Maybe ...
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36 views

Add nRF24L01 to a project

I Have a Liquid Level Project that Currently uses an Oled display. I have just discovered the existence of the nRF24L01 wireless communication module; and it is exactly what I need to make my project ...
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Arduino NRF24LO1

I have a problem with transmiter (Arduino uno) and receiver (Arduino nao). When I am trsmiting that I receive that: An this is my code for receiver #include <SPI.h> #include <nRF24L01.h> #...
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92 views

Interfacing Arduino nano ,adxl335 ,nrf24l01

I'm trying to make a project with this conection diagram but I don't think it's correct , and my adxl sensor died . Can you help me with a modified one ?
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1answer
49 views

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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58 views

nRF24L01 +pa +lna link does not communicate

I’m trying to create a link between two nRF24L01 units. Each nRF24L01+-based module (purchased) is connected to Arduino Nano on a custom-designed PCB. The printed wiring is per the hardware ...
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45 views

NRF24L01+PA+LNA communication problem

I'm trying to communicate between two NRF24L01+PA+LNA modules. I know that NRF24L01+PA+LNA modules are consuming a lot of power and here is my 3.3V power circuit. The LM317 datasheet says it can ...
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167 views

Power down NRF24 to conserve battery life using MOSFET

I'm using a Pro-Micro to send messages using NRF24 module from a remote location, using batteries (later on, will be recharged using solar panel). To conserve power, Pro-Micro wakes up every 30 ...
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28 views

Problem communicating Using Nrf24l01+pa+lna, I am receiving 00 Hex

I am trying to build a wireless switch. At one end, I have Arduino Uno connected to Nrf24l01+pa+lna module. While at the other end there is Arduino Nano connected to Nrf24l01+pa+lna and a relay. I ...
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66 views

Getting Nrf24l01 modules to work!

I am at my wit's end with these Nrf24l01s. A bit of history: I have ordered about 25 of these, tried the adapter board, read every article, tried every sketch (including Robin's tutorial), powered the ...
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42 views

Communication between two nrf24l01

i can't figure this out, i have a task to get data from RX module that led has turned on. The Idea. I press push button on TX part, and led diode turn on, on RX part. Then RX send's data to TX that ...
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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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206 views

nRF24l01+ Problems. Data is being recieved as 0

I am trying to transmit the values of three potentiometers via the nRF24L01+ (w/antenna). I am using the regulator designed for the nRF24L01+, so I don't think I need to add a decoupling capacitor. I ...
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2answers
177 views

NRF24 and usb digispark

I want to connect NRf24 module with digispark and use USB capabilities at same time. currently, i use this conexion diagram: NC PB5 1|o |8 Vcc --- nRF24L01 VCC, pin2 --- LED --...
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269 views

RF24- Splitting and sending a longer than 32 byte payload

In order to send a long payload I've created the following function: void splitMSG(const char *msg, const int arraySize, const int len) { Serial.print("Array size: "); Serial.println(...
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How to connect two arduinos with smartphone wirelessly

I'm working on a project that have two separate setups for Arduino, each Arduino read sensors and send data to smartphone. how to connect two Arduino then send all data to smartphone over Bluetooth?
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2k views

NRF24l01 Channel switching

I have a NRF24L01 radio module. The description indicates that it can work in the ISM frequency range of 2.400 ... 2.525 GHz. The channel step is 1 MHz, and there are 125 channels in total. The ...
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169 views

Combining an NRF24L01 transmitter/receiver with an Adafruit Motor Shield V1?

I'm making a vehicle project as a way to learn Arduino. I've set up motor control for a number of DC-motors plus a servo via an Adafruit Motor Shield V1 that I picked up. Everything works fine, but ...
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RFMesh (NRF24) for STM32F1

I wanted to know the RFMesh library available for Arduino Uno can be used for STM32F1? Will it work? Or they have seperate set of library for STM32
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294 views

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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2answers
682 views

Bluetooth module vs wireless module Arduino

My main question is, what is the main difference between HC-05 Bluetooth module and NRF24L0 wireless module? Which should I buy? Which makes these 2 modules different than each other? Which one should ...
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74 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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345 views

Sending data struct with 2 int fields from Arduino to Raspberry via NRF24L01

I'm trying to do wireless thermometer on max31865 arduino and nrf24l01 but I'm having problem sending whole data struct I can send int or char arrays but when I try to send whole struct I got output ...
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92 views

Why do NRF24L01 modules only communicate in 1 direction

I have 2 NRF24L01 +pa +lna modules connected to 2 arduino mini pros. One of the modules is on a joystick and the other one is on a airplane. Everything worked perfectly until last week when they ...
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1answer
685 views

ESP32 send data to another ESP32 without establishing a wifi connection

Originally I was creating a project consisting of the Atmega328P and NRF24L01 to create multiple arduinos that could talk to each other. Basically I was creating something like this: As the network ...
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209 views

Using NRF24L01 as transmitter and receiver (transceiver)

I am using the NRF24L01 module to communicate between multiple Arduinos. For this example I will have a master transmiter (tx) Arduino and a salve receiver (rx) Arduino to illustrative better my ...
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92 views

nRF24L01 only getting 10 meters range!

I am making a project where I need to communicate between two devices that are about 300-500 meters apart and might experience a lot of RF interference and obstacles. So I thought for initial testing ...
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1answer
98 views

Sending Strings from NRF24L01 to app

I want to send pushbutton status from the nrf24l01 module to the app named nrfConnect. I could only find libraries that allow me to send float values. How could I send String values to the app? Thank ...
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91 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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111 views

nRF24L01+ radio not transmitting anything but says it is

I have a nRF24L01+ radio that was working like a charm for many months now, and a few days back, I was trying to send something and then receive it. The transmitter initialized properly and said it ...
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724 views

nRF24L01 - Measuring distance using time elapsed

For school usage, my team and I are working on a wristband that will alert the user if they are too close to another wristband (for social distancing). The problem is measuring distance using radio ...
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4answers
357 views

NRF24L01 Transmission Problems between Arduino UNO and Arduino Nano

I'm a beginner in using NRF24L01 tranceiver module. I tried sending a simple "Hello world" using Arduino Nano and a Arduino UNO with the use of two NRF24L01 modules. I don't get any output ...
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1answer
67 views

Motor noise on my Arduino RC?

I want to make an RC car based on two Arduino Nanos, two nRF24L01s (Rx and Tx), and a Pololu brushed motor driver, and it works, more or less. Sometimes it works very well and everything goes nicely ...
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52 views

Arduino Nano-combo NRF2401

I am using two nano-combo for a RC car and when the remote emitter battery is too down if the car was running and battery finally empty the car was still running...is there any way by programming to ...
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Trouble with basic communication between two NRF24L01 modules

Introduction I am trying to setup a radio communication using the NRF24L01 module because I want to use it to control a tank. The first thing I did when I got the modules was watching some basic ...
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1answer
281 views

NRF24L01 +pa +lna modules do not communicate

I am building an rc airplane and I want the controller and the plane to communicate using 2 NRF24L01 +pa +lna modules. I am using an Arduino UNO and a Mega. I hooked them up corresponding to this ...
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124 views

i build quadcopter using USB HOST SHIELD + NRF24L01 but the data transmit is wrong

I am building mini Arduino quadcopter project. I am using USB host shield for joystick support and nrf24l01 to transmit the data. Unfortunately, I got wrong data transmitted at the receiver and tried ...

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