Questions tagged [nrf24l01]

An Ultra low power 2.4GHz RF Transceiver IC

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61 views

What is the major difference between a WiFi and RF Module?

In an interview recently, someone asked me what is the major hardware level difference between a WiFi module (ESP8266) and RF module (nRF24L01+) that I had used in my projects. I mentioned that both ...
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46 views

IoT wireless solenoid circuit

I am a Newbie and I do not have a lot of expirience. The circuit has been put together from pieces I have found on the internet. My goal is to develop a reliable wireless solenoid circuit to water my ...
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2answers
84 views

Magnetic Field Interfering with Radio Waves

i am currently building a device that requires a NRF24L01 module to send radio waves to another NRF24L01 to be picked up and interpreted. This is a using an arduino running a code to transmit data via ...
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1answer
33 views

Making an omni anntena for PA+LNA+Antenna

I have several NRF24L01 RF modules that I would like to use to transmit data from a car to a ground station. When testing the modules, I have found that the data transmission is only successful when ...
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1answer
60 views

AVR NRF24L01+ No Communication, No IRQ Activity

I've been scratching my head for a few days over getting the NRF24L01+ modules to work on AVRs (ATMega328/p). I followed Gizmosnack's tutorial, not changing very much at all from his code. I've also ...
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2answers
48 views

Integrating IC transceivers on a pcb

I have a question about the difference between transceiver modules and transceiver ICs. I want to integrate a 2.4GHz transceiver IC - nRF24L01+ onto a PCB instead of using the NRF 24l01+ module. ...
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2answers
114 views

Cause of background buzz in my walkie talkie example? [closed]

I got a simple RF24Audio walkie talkie example working. I'm using the sketch file provided by the RF24Audio getting started example: https://github.com/nRF24/RF24Audio/blob/master/examples/...
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2answers
151 views

How to decrease nrf24l01 transceiver range?

I've just got my Nrf24l01 but then I found out that the working signal range for the module is 100m and above. Our real intention for the module is to let the nrf24l01(Receiver) out of range for about ...
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22 views

Cannot establish a communication between two nRF24L01+ modules

I’m willing to experiment with nRF24L01+, so I have bought a set of modules from China, and I’m trying to establish a communication between an Arduino Nano and a Raspberry Pi 3. At first, I tried to ...
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0answers
62 views

2.4GHz RF design losing signal

First time poster here, please excuse holes in the plot. I have a simple wireless design made of an MCU (atmega328p) and an NRF24L01 module, powered through a 3.3V regulator, talking to a similar ...
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164 views

nRF24L01+ radio pcb trace matching components for SMD Antenna

I am trying to design a pcb layout with the nRF24L01+ chip. The documentation seems to cover nearly everything I needed to know, but with a small thing left - the antenna. I would love to use an SMD ...
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1answer
75 views

How does Wi-Fi deal with multiple frames received at once?

Right now I'm trying to establish a network of 30+ transceivers with NRF24L01 modules - one of them acting as central. However there are big problems, whenever two or more nodes try to send data to ...
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2answers
189 views

Arduino Nano disconnecting from PC on plugging in 3.3v NRF24L01 into PCB

I've built this PCB which includes two I2C port expanders, an Arduino nano, inputs for buttons and encoders, and headers to plug in an NRF24L01 board. Currently, I just have code running to read two ...
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3answers
90 views

Non-Electrical-Engineer-Here: Can I use a 5v 2A power supply with any 3.3V regulator?

I have a 5V 2A DC power supply I plan to power a custom arduino with. However, I'm also using a NRF24l01+, which requires 3.3V. So, I'm in the market for a 3.3V regulator, but I'm unsure of which one ...
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2answers
71 views

Antenna Design for Omnidirectional transmission

I have been working on a custom drone for quite some time now. One thing I have found an issue with is the remote control antenna orientation in relation to the drone. In some directions I will get ...
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1answer
121 views

Inside of 2.4 GHz Dipole Antenna

I bought the following dipole antenna: Now I want to add some extra simple reflector and directors next to this dipole to construct a Yagi-Uda antenna. For this aim, I need to know where is its ...
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1answer
61 views

Replacing Antennas for Wireless Communication

I have been working with NRF modules for some time now. I have been using the 100m rang version as shown here. They are working great but I want to increase the range, so I have bought the PA + LNA ...
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1answer
355 views

Unable to flush TX FIFO queue of NRF24L01+

I am writing code for an ESP32 to send data using a NRF24L01+ module to another NRF24L01+ module connected to an Arduino Pro Mini. The Arduino can successfully send data to the ESP32. So everything is ...
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0answers
302 views

How to develop for the NRF24LE1? [closed]

I found about the nRF24LE1 chips a while ago and they seem perfect for really small applications that require RF since they are the same as the well-known nRF 24L01 but include an 8051 MCU and memory. ...
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0answers
193 views

nRF24L01+ mezzanined over microcontroller

I'm designing a hobby project to fit in a certain form factor using a mini nRF24L01+ module and an ATtiny441 microcontroller. To save space I'd like to mezzanine the nRF module -- i.e. solder it to a ...
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1answer
148 views

Do NRF24L01 modules have to use the same SCK-Frequency to work together?

I have two Atmega 328p Microcontrollers connected to NRF24l01 modules. The first one uses a SCK-Frequency of 2Mhz and the second one a SCK-Frequency of 4Mhz. Sadly the Connection doesn't seem to be ...
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1answer
600 views

NRF24L01+ not communication

I have two different types of the NRF24L01+ modules and I'm having difficulties with one of the models. See pictures below for how I have them wired. I'm able to send/receive messages using Model B ...
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1answer
709 views

How to program MCU to work with NRF24L01 module in Bascom language? [closed]

I want to connect several devices together with this RF module. But it's hard for me to understand the Bascom program. Could you please tell what the main idea is or explain in general for me? Do ...
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1answer
380 views

How to put several nRF24L01 adapters (+module) on a breadboard?

I want to use several nRF radios together with an adapter like this: Also, for the device I'm using these for (two nRF's) also I have other components which I put on a breadboard. However, the nRF ...
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1answer
837 views

Transmit and receive data with nrf24l01

I have little bit problem to transmit and receive data with nrf24l01. I use spi communication to communicate my MCU and nrf24l01. My spi communication is working. But i cannot receive any data from ...
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1answer
318 views

Test Transmit Signal for nRF24L01 transreceiver

I have set up a circuit using my joysticks and nRF24L01 transmitter. While I am waiting for another nRF24L01 to use as a receiver, in the meantime I wanted to check whether the nRF24L01 in the ...
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1answer
516 views

Which nRF24L001+PA+LNA should I get? [closed]

I ordered 5 nRF24L01+ chips for 2.4 GHz RF. I have not done tests with them, but doing tests with my current 433 MHz results in a low speed, few meters maximum range. So I expect with my 2.4 GHz RF's ...
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2answers
676 views

Difference between 2.4Ghz ISM and IEEE 802.11 frequency bands?

It may be a silly question to ask the difference between a frequency band and a standard protocol which is represented by IEEE. But, I've been reading the wikipedia page of the IEEE 802.11 and it says ...
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1answer
157 views

Question about 3/~5 output select pin of a boost IC?

I want to power up Arduino nano and nRF24l01+ 's Vcc from MAX756 step-up DC-DC convertor (datasheet). I'm using a single AA battery (1.5V) There is a 3/5(bar) pin to select whether the output ...
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1answer
614 views

NRF24L01+ Longer wires or add antenna cable?

I am using a network of simple 2.4 ghz Nordic NRF24L01 radios (with the stubby SMA antennas) together with pro mini Arduinos. I have to place one radio and sensor inside a metal tube about 6 to 9 ...
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0answers
212 views

Trouble getting attiny85 to drive nRF24l01+

I'm attempting to make an nRF24l01+ send out a simple identifying code when a button is pressed. I'm trying to keep the solution as small as possible, so I want to use the attiny85 to drive it. Her'...
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1answer
231 views

porting code from P18F45K22 to 18f2550 problem

I'm trying to use the nRF24L01 with a pic18f2550 using microc compiler, I started from an example code provided by Nordic for 18F45K22 (which can be found here example code). I've changed pin ...
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1answer
471 views

Is it fine to use 2.4 GHz nRF24l01 modules in commercial products under FCC rules? [closed]

I want to use nRF24l01 modules commercially. But, at the same time, I am aware of some of the FCC rules. I am just curious if someone knows about the regulation and could help me in this. I found this ...
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1answer
103 views

How to verify if power supply is enough to handle power consumption spike?

I am looking to find out how to analyze what will happen to a power supply if my load suddenly draws more current. On my current example ( but that also happen to me with different components ) For ...
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1answer
126 views

nrf24l01 transceiver on altera board de2-115 [closed]

I'm trying to use the nrf24l01 transceiver on altera board de2-115. I would like to send a signal from the altera board using this spi module to another spi module and use the spi module on the ...
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1answer
110 views

Can closed metal box work as a wave-guide for wireless transmitter?

I am using NRF24L01 and ZigBee modules for wireless communication. I kept the modules in the tapered closed aluminum cylinder for sensor data transmission. The signal was being received when the ...
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1answer
201 views

Why NRF24L01+ modules set RPD bit when detecting a signal above -64 dBm on the channel?

Why the value -64dBm? Is it because anything above this value and the receiver is unable to decode any valid packet on the channel? Does this have anything to do with receiver sensitivity? Can ...
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2answers
282 views

2.4 ghz RF radio and antenna - nrf24 underneath a 7-segment display

I have this tiny nrf24 module that I want to use underneath a 7-segment display. How much will this affect the range and the quality of the radio signal? I have done a lot of research and testing on ...
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2answers
461 views

nRF24L01+ not working by software SPI

I want to send and receive data on the air using a pair of nRF24L01+ modules. I am using PIC16F684 as the micro-controller and working with software SPI. I put data to MOSI line before raising the SCK ...
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3answers
2k views

Powering an Arduino Pro Mini 5V and a 3.3V nRF24L01+ Transceiver from One Small Battery

I'm trying to power an Arduino Pro Mini 328 5V/16MHz with a single battery, preferably a LiFePO4 for safety purposes (it doesn't need to be more than around 300 mAh). However, I'm connecting a ...
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1answer
250 views

Fetch RSS value using Nordic NRF24L01 module and RadioHead library

RadioHead provides a lastRssi() function (http://www.airspayce.com/mikem/arduino/RadioHead/classRHGenericDriver.html#ab04f2ca335d89f5fac1d213c0aea9da2) to fetch the ...
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1answer
440 views

nrf24 bluetooth image transfer

I'm trying to build "arducam-bluetooth-module-wireless-image-system" using an NRF24L01. I wish to have a long range transfer of a single image from a remote location to my Android phone whenever it ...
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4answers
3k views

Running 3.3V MCU from LIR2032 Lithium-ion button cell

Background I wish to power my circuit with a Lithium-ion battery LIR2032 (around 40 mAh capacity). These batteries have a voltage that goes from 4.2V to 3V typically during their discharge cycle. My ...
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1answer
279 views

NRF24L01+ and NRF24LU1+ Communication - RFID application

I have an RFID application in which tag has NRF24LU1+ and the Reader has NRF24L01+ chip. The Reader is based on STM32F4xx Micro-controller. I have two same Readers which are communicating with ...
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1answer
178 views

What is the effect of EN_CRC on NRF24L01+

Throughout the datasheet, CRC is mentioned as mandatory field of all packets, and NRF24L01+ will check it before accepting a packet in FIFO. But then there's this register that says I could disable ...
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1answer
660 views

nrf24l01 frequency switch timing

How much time does the nrf24l01+ take to switch frequency through RF_CH? Can this switching time be parallel to switch between Tx/Rx/Standby modes?
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1answer
3k views

Can a nRF24L01+ chip work alone? (i.e. without Arduino borad)

I have a prototype based on the ESP8266 wifi tranceiver as a standalone module, without any Arduino borad. It works fine, but I have heard that the nRF24L01+ chip is less power consuming. After ...
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1answer
553 views

Impossible looking solder points on NRF24L01+ module

I cannot even fit two dupont connectors side by side. I am really quite uninitiated in electronics, being a software developer. Is this an industry standard or some sort of way to connect this? It's ...
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2answers
3k views

Does an active low pin need a pull up resistor?

I am interfacing a PIC24 microcontroller with this nRF24L01 2.4GHz transceiver. The transceiver has an active low interrupt pin that is toggled on transmit and a few other instances. Does this pin ...
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1answer
195 views

Diodes to drop voltage for RF module

I am making a standalone battery powered arduino project which uses nRF24L01+ for radio communication. nRF draws 20 mA current max. Can I use 3xAA cells along with 2 diodes (which drop 0.6*2 = 1.2 V) ...