Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [nrf24l01]

An Ultra low power 2.4GHz RF Transceiver IC

The nRF24L01 is a highly integrated, ultra low power (ULP) 2Mbps RF transceiver IC for the 2.4GHz ISM (Industrial, Scientific and Medical) band. With peak RX/TX currents lower than 14mA, a sub μA power down mode, advanced power management, and a 1.9 to 3.6V supply range, the nRF24L01 provides a true ULP solution enabling months to years of battery lifetime when running on coin cells or AA/AAA batteries. The Enhanced ShockBurst™ hardware protocol accelerator additionally offloads time critical protocol functions from the application microcontroller enabling the implementation of advanced and robust wireless connectivity with low cost 3rd-party microcontrollers.

The nRF24L01 integrates a complete 2.4GHz RF transceiver, RF synthesizer, and baseband logic including the Enhanced ShockBurst™ hardware protocol accelerator supporting a high-speed SPI interface for the application controller. No external loop filter, resonators, or VCO varactor diodes are required, only a low cost ±60ppm crystal, matching circuitry, and antenna.

The Nordic nRF24L01 is available in a compact 20-pin 4 x 4mm QFN package.

(This text based on the summary at nordicsemi.com)

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119 questions
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RF Wakeup - Battling power consumption

I am currently using two nRF24L01+ (2.4 GHz RF transceivers) together with two AVRs to create a keyless entry system. My problem is battery lifetime when using a CR2032 battery to power the key. The key will sleep until a signal is received from the…
Tim
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How does the nRF24L01+ performance degrade with supply voltage?

I'm looking at building a small handheld unit based on an nRF24L01+ in PRX mode. It needs to be able to receive "continuously" to receive control signals that would cause an attached Atmel ATtiny to indicate some LEDs or make a PWM tone. Since it…
LeoNerd
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How to develop for the NRF24LE1?

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. But I can't seem to find much information on how…
hjf
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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 circuit (running at 3.3V) has a maximum current…
Darko
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Multiple nrf24l01, shared power, ripple/interference, DSO screenshot provided

I've got this circuit with 3x atmega328 & nrf24l01+ running off shared power supply, either 2x AA battery or 3v3 reg. It acts as a repeater, and depending on the origin of the message and the destination it could be passed through all 3 radios on…
Hayden Thring
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Wireless NRF24L01 chip compatibility

I have ordered a set of transceiver with NRF24L01 from various vendors. (with and without external…
Max
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Broadcast in nRF24L01+

I'm able to establish a communication channel between two nRF24L01+. But once I kick in a second listener, only one of them gets the message. Funny enough, it's always the same that "wins" in the situation where two are listening. Is there any way…
Hugo Sereno Ferreira
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How many nrf24l01+ can be transfer data between themself in one pipe

My IOT project has ten or more nrf24l01+ modules which They're going to get orders from one nrf24l01+ module and then get back response to that one nrf24l01+. Can i do it in one pipe?
ali
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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 board on the other side. This has been working well…
user1924406
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Increasing RF24 range using an antenna

First time poster here on electronics, so please excuse any big mistakes. I'm working on a project that uses the NRF24L01+ chip for radio communication between an arduino uno and a raspberry pi. It sends a simple ascii char array which is…
afischer
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nRF24L01+ RX in pulsed operation to save power?

I'm considering building a handheld radio receiver based on an nRF24L01+ and an ATtiny chip. It needs to receive "continuously", to receive a control signal that might operate some attached LEDs or make a tone from the PWM controller. However, due…
LeoNerd
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STM32F4 interfacing with NRF24l01+

Like the title says I want to use a NRF24l01+ with a STM32F4. So far, I realized the communication with two NRF24l01+ and two Arduino but I would like to exchange on Arduino with the STM32. I looked up the internet an found this site:…
kimliv
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Very sensitive PIC16F886 SPI with NRF24l01+

Firstly, it's been 2 years since I've touched anything but mbed or ardunio so there's a strong chance I've done something silly to cause the problems I'm seeing. I have a PIC16F886 on a breadboard with a 1nF cap across Vdd and GND. Connected to the…
SimonBarker
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NRF24L01: SPI communication only writes zeros to registers

I am trying to write simple code for transmitting with the NRF24L01 wireless chip, but the SPI communication is not going very well. Using the code below I can read any register on the NRF24L01, verified using the registers' default values from the…
Mahmoud Salah
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nRF24L01+ Doesn't Receive Packets

I am trying to send data from one MSP430 to another MSP430 using Nordic Semiconductor nRF24L01+ radios, but I am unable to receive transmitted packets. I am able to read from and write to the radio registers using SPI and I get interrupts from the…
dman
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