Arduino Tutorial: Arduino NRF24L01 Wireless Tutorial with Arduino Uno

Do you want to add wireless capability to your Arduino Projects? Using the NRF24L01+ module is a very easy and reliable way to do so. 🎮 My Android Game: bit.ly/QuizOfKn...
🛒 NRF24L01: educ8s.tv/part/...
💻 Code: educ8s.tv/nrf24...
Want to learn to code?
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[@mohabsoliman7172]

finally ihave been looking all day for anyone who explains the code itself and every time i stumble upon an indian guy who desn't know what he is doing ur a life saver thanks you very much

[@pabloc.izaguirreartavia828]

The best teacher that i found in KZbin ! Thanks From Costa Rica !

[@Educ8s]

Muchas gracias Pablo! Saludos desde Grecia!

[@simonemastroianni1985]

educ8s.tv I'm from Calabria, we are near :)

[@victorialevy6177]

Hi Nick, I am an engineer with SXM radio @ the S. Florida labs... I an also into amateur radio (K4VML) so I truly enjoy any sort of fun RF side-project. Thus I found your video to be quite useful/helpful in enabling a pair of these NRF24 GFSK modules. I wanted to take your example a bit further, and have thus interface a nice OLED LCD display. The only issue is that the SPI-bus utilizes what R the std. pins for these displays (unless I used I2C, which I did not wart to do). So I want readers to note that U can easily do this by re-mapping the LCD I/O signals within the LED display object/function => LiquidCrystal lcd(10, 9, 5, 4, 3, 2); Changing the RS & E controls pins on the Arduino from 11 & 12, to 10 & 9, as show.. Works great, and now users can send data and display on the LCD..!!! :)

[@cevizist]

The greatest tutorial I've ever seen about NRF24L01. Thank you for your help and efforts to prepare such an explanatory tutorial. Thumbs up :)

[@Educ8s]

Thank you very much!

[@alexkatsis2386]

thankyou. you have a great way of explaining. Your videos are understanding for people who are learning arduino. thankyou!!!

[@Educ8s]

+Alex Katsis Thank you very much Alex!

[@doublerave6536]

hi I'm using nrf24l01 with mpu6050 dmp example. Also I'm using rf24.h library. My problem is that "radio.write" function cause a delay on code and that makes fifo overflow how I could fix it? Also your video is great!

[@sachinsrinivasan4744]

Hi, I am currently working on designing a swarm of robots that communicate with each other through wireless communication. I am using arduinos in all the robots. I was wondering if you could post the video for bi-directional communication. I also have a question. Will this system be able to talk to more than on controller at a time? Can I make all my robots talk to one another or is it just one to one? Kindly clarify. This video was really informative and easy to follow! Thanks :)

[@nidhikhamayacha6967]

I am getting error pgm_read_ptr was not declared in this scope

[@mitsos306ify]

I tried to make work but I was not able. Is there a way to verify that the module is OK? The problem is that I have only one UNO so I used an UNO and a MEGA bug I don't think this is the problemmm

[@harrysnelling8132]

tysm for this clear tutorial, could not get to work at first, but then I double-checked the connections on the website and realized I had connected 1 cable wrong and got it working :D

[@raybright5805]

I'm looking forward to your future examples with this device especially bi-directional & networking. Love your work ....

[@TylerHallHiveTech]

Very nice video. I liked how you have the little diagram for pipes/packet etc. I've combed over the data sheet more times than i would have liked. This simple explanation in the video actually tells you quite a bit! So I've worked with these quite a bit now.... used them four 4 hackathons and have had awesome success and have made some cool projects. hive.technology/2015/02/hackathon-eco-node/ and hive.technology/portfolio/eco-node/ I have a few of suggestions so people don't tear their own hair out. First, these things are VERY VERY sensitive to their connections. Yes, sometimes jumper cables work. But avoid the jumper cable phantom problems if possible. I found its good to use the female jumper, pop off the plastic cover, and drop some solder on the pin/female connector to get a solid connection. I've had more success with a connection to an Arduino nano/mini where you can again, solder directly. An uno sometimes won't connect in the jumper cable spot very well, especially if the uno is well used. Second, make sure that your device actually works. Seems obvious.... but I've definitely got my fair share of duds with some of these devices. Lots of time spent debugging, when just switching out the module fixed all problems. Especially from the really cheap versions of the chip (

[@Educ8s]

+Tyler Hall This is very useful comment! Thank you very much for taking the time to share your experience with us. This way we will move forward faster and easier. That's the beauty of the community! Thank you again! We will keep in touch since I may ask for your advice. Also, great website and projects!

[@dragonman101]

I'm really struggling with this device. I have the KEYESTUDIO NRF24l01 (www.amazon.ca/gp/product/B07FGDY31M/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1) but my serial monitor is blank. I am using the redboard version of an arduino uno and an actual arduino nano (www.amazon.ca/gp/product/B07DFL1LC5/ref=ppx_yo_dt_b_asin_title_o00_s01?ie=UTF8&psc=1). The nano transmits, the uno receives. The nano can upload a sketch, so there are no issues there, and the uno can be programmed too. The transceivers just aren't communicating. Do you have any idea what could be happening? I've followed this tutorial exactly (howtomechatronics.com/tutorials/arduino/arduino-wireless-communication-nrf24l01-tutorial/) which is similar to this video. Though I noticed that the wiring diagram is incorrect about the SCK pin, so I am testing both.

[@minuchan24]

Hey I am having a strange problem. The transceiver are working on my nano but not on my uno. Also I can program my atmega chips using Arduino nano as an isp but the uno won't let me program them. The uno is working fine as all code runs good on it. What could be the problem. Using Arduino ide 1.0.5 Arduino uno is working but now nano is not working with transceiver. the uno still can't program the atmega chips while the nano can easily program them

[@startobytes]

Hi, could you make a Video about how to use the Nrf24l01 with a button and a Led at the recever.

[@prakashb1278]

what is the range for line of sight and through walls communications?

[@akshayd5360]

Very nice! Made it simple to understand

[@shipettostv]

Hi! Nice video! Unfortunately, I am facing an issue with, well, I dont know yet :P, and it doesnt work. I have been trying for months to get it to work, but without any luck. Did you by any chance, face any weird issues with this module?

[@chanchopanza]

Great tutorial, thank you for making these videos 👍

[@Educ8s]

+ɿɒɔƨO Ɔ Thank you!

[@aaronavila4063]

Hello there, I was trying to do this project that you did on the video. The transmitter side is working and there's already an output message in the serial monitor. But the receiver side has no output message in the serial monitor and its Arduino doesn't blink compared to the Arduino of the transmitter. I also tried switching the codes between the two arduinos but it only ends up that the transmitter is the only one working/has output message in the serial monitor. I guess my two NRF24L01 modules only work now as transmitters. Any advice?

[@skypowergb3842]

my experiance with nrf24l01 modules , horrible cant get them to work

[@omarkeblawi4356]

My NRF24L01 keeps stopping from working (it works once, and then stops), although I have connected it to 3.3 (v), and I made sure that the wires are good, so I decided to order more NRF24L01 modules, but I think that the same thing is going to happen! Any suggestions?

[@Racemade3D]

I often have the problem, that if my arduino with the transmitter shut down (because of low battery), and then the reciever gives out the last message in a loop (for example "3"). But in fact i should have zero data (for example "0"). Is there a chance to avoid the problem?

[@jeranrai645]

Somebody help me, We only defined the CE and CSN pin of the NRF24lo1 to the arduino in the code, what happened to the rest of the three NRF24l01 pins ( SCK, MOSI, MISO) in the code, or it dosent matter to the code ! so we could randomly connect these pins to any digital pins in arduino differently in transmitter and receiver ?

[@diff_edge]

SPI uses MOSI, MISO ans SCK for communication. Those pins are hardwired to pins D11, D12 and D13 in the case of a Uno. You cannot use them for anything else if you are using SPI.

[@pranshumishra3088]

Hello, I want to develop a tow way communication using NRF24L01 arduino nano and hall effect sensor, where hall effect will give the feedback for fan (driven by motor) rpm and based on feedback speed varies with pwm. Can you help me?

[@tristunalekzander5608]

I think mines defective if I try telling another arduino to blink an LED ever 100 ms it blinks randomly every 100ms - 30 seconds... This is completely unpractical for anything I was going to use it for. Changing anything and using any of the functions just breaks it, I can't use "writeFast" nd changing the data rate makes it unresponsive what a useless piece of shit

[@Genartron]

hello, I have a problem whit librari nRF24L01.h, because dont read and the comand setPAlevel dont working

[@elchinitaqueen]

I need help for my project about wireless warning indicator using this module nrf24l01 pls help ,my sensor used is ultrasonic sensor

[@gulfsurfco]

Nice instructions. I have been looking for a concise and well presented instruction and your video has been one of the best ones. Thanks.

[@markruiz9397]

I am sensing humidity temperature turbidity and UV from one uno to another uno, however, only half of the data is received, the rest is set to all 0’s......any idea why? :/

[@markruiz9397]

I am sensing humidity temperature turbidity and UV from one uno to another uno, however, only half of the data is received, the rest is set to all 0’s......any idea why? :/

[@gudfurt8464]

Does pin 6 need to be connected to a pwm pin? Im using a l293d motor driver and all i have available are the analog pins. Is it possible to connect the nrf24l01 using the remaining pins?

[@madgab1010]

Hi, sorry i'm verry newby with arduino and i ask me a question; in the website github.com/TMRh20/RF24 . Wich library that i have to download for the nrf24l01? Cause i'm confuse with all the file. thank you

[@m.imrankhan7352]

the tutorial was fabulous i want to ask something that how can i detect that data is receiving at receiving side of the arduino ... plz guide me

[@Educ8s]

+M. Imran Khan I will prepare another tutorial on that!

[@vinayyadav711]

can we use one transmitter module & four receivers to establish the communication among themselves by pairing them? Is two way communication is possible between those modules? can we operate relays in each receiver circuit wirelessly?

[@Educ8s]

Yes you can do that

[@Twizington]

My transmitter shows "text to be transmitted" though my receiver never has any activity at all on the serial monitor. Anyone know what could be wrong here? I have never got these to connect and have been trying for weeks.

[@runningwithscissors7715]

tried this with two nanos as a safety stop for my nephews ride on but couldnt get it to work...sadly just gonna buy one already built...

[@alexdoan6943]

Will you make a tutorial on connectivity between devise (i.e. sensor) and IoT platforms? I'm deeply interested in ThingsBoard? for example. TNX

[@tristunalekzander5608]

Why does begin disable the built-in LED? This was a headache while trying to use it for testing.

[@eranbetzalel8352]

Hi , i watched this tutorial NRF TX and RX with arduino and it was very helpfull. now im trying to do something more compicated, to have 2 arduino tx and rx when im press a button (depends on which one) for example when im press "arduino 1" button, the LED on arduino 2 blink and when im press on "arduino 2" button, the LED on arduino 1 blink. I realy need help its for my project in my college. thank you very much.

[@xxxd6068]

Can we use any module as an transmitter and receiver or is is like this is transmitter and the other is reciver(if you buy the reciver module you can only receive data or it can send and receive). Plz help it for my drone

[@ravindrakhopade9487]

i want to connect multiple arduinos and form private area network. Is it possible with nrf24l01 module

[@42222]

My reciever isn't working. I tried the send code and it works on both arduinos but no recieve it shows nothing in the serial monitor. :(

[@JulioZaga]

check 115200 baud at serial monitor

[@vikramspace]

i am having the same problem.. reciever serial monitar shows nothing

[@vikramspace]

i am having the same problem.. reciever serial monitar shows nothing

[@vikramspace]

baud rate is 115200 but still not working

[@upikjamils7927]

check the CE and CSN pin your nRF24l01 adjust your library

[@apeguitar2975]

This is the clearest explanation videos of using 24L01 I've ever watched! nice and clear!

[@Educ8s]

Thank you for you kind words!

[@akelansiva137]

educ8s.tv hi i was using you code buy i can seem to get data on the receiver side when i take out csn pin i get value but is just random value and if put back the csn pin it stop working and i dont get anythig. please help

[@1abas]

هل يمكن اكتشاف إشارات Bluetooth وانبعاث حلقة عند اكتشافها بواسطة هذه الأجزاء الإلكترونية؟

[@dipankarnandi7708]

Why does the RF module doesn't work once the power is reconnected to it ! I mean.. it receive the data efficiently ..however when the power of the receiver is reconnected, it does not receive any data at all ! Can someone tell why this is happening

[@TheOrenbarak]

FINALLY GOT IT TO WORK THANKS TO THIS VIDEOS!!! Thanks a lot bro! great example!

[@Educ8s]

I am glad it worked! I will prepare more advanced tutorials with those modules in the future. Stay tuned!

[@QwertYuiop-dg8yp]

Is that even right? The serial monitor you showed in port COM7 is the transmitter not the receiver

[@kundangaikwad9845]

I am not able to obtain bidirectional communication ? Only one arduino sends msg and received at other but second one is not sending back.

[@arahovagumian8425]

Can I use "RF24.h" library with SYN115 / SYN480R wireless transmitter and receiver communication?

[@hasiah611]

How to do multiple transmitter, and one receiver communication?

[@electronic7979]

Excellent

[@pacsmile]

I made the mistake of connecting this module to 5v, i was working fine with it for about 2 hours more or less, then i realized my mistake and i changed to 3.3v asap, the module is still working. So i guess it's not that fragile, but still, never do that.

[@Educ8s]

+pacsmile Thanks for the comment, that's good to know!

[@AgentOffice]

Probably uses a horrific protocol though

[@grigoryheaton9346]

Another great video, keep it up! Likely going to pick up some of these modules later and try to have my gaussmeter wirelessly transmit data to a screen.

[@migace7]

I have tried several programs and had hope for this one. But nothing.

[@tropicaljantie]

I am having a few problems... The serial monitor of arduino.tx.device.1 shows that it is transmitting (tx button is yellow blinking while the serial monitor shows the output of what is sent). The arduino.device.2 is only showing rx led blinking when I UNPLUG the cable from pin8 or pin7 of the arduino.device.2 / any suggestions?

[@DrekerboyStudio]

hi i followed everything but it keeps recieving all kinds of weird symbols. and yes i tried to switch from baud rate. so thats not the problem. please someone help me! Thanks.

[@keeriofficial5315]

This happened to me also.But this can be solved by tightening all the connections.Once i tightened nothing comes on the serial monitor.Thats my problem

[@itkomchannel5785]

sir which code should i modify in my receiver if i want set my receiver as server with many clients ?

[@barbasbandas6665]

I am having problems with the nrf24l01. Capacitors, power supllies and PA Levels dont changed anything.... When I open the GettingStarted Sketch I receive either 0 or random numbers or even the Serial Monitors just blocks. Baud rate settings are ok too. They were working kind off bad yesterday but today nothing. Can anybody help me? Is it possible that my libraries are not working correctly??

[@DogRox]

Great video! I bought a few of these last year and never got to use them. I was going to make some kind of two way text communication systems, but I never did. I never really got into learning how to use them. This is opening the door for me now now I can finally put them to use. I could see a lot of uses for these things. looking forward to seeing your bidirectional video. That will definitely come in handy. :-)

[@Educ8s]

+Dog Rox Thanks for the comment! Try them, it is very easy and fun!

[@azevedonik]

Hello, is it possible to connect 4 emitters to one receiver at same time? For example, I'm trying to sample at the same time 4 channels of 4ADC's and I want to "multiplex" them over wireless comunication. Can I do this?

[@vactirio]

Nikos very nice review. We would love to see a NRF24L01 network mesh tutorial as there is no much info out there. Andreas

[@tsetsefly4538]

Please help, why am i receiving a garbled mess?

[@ascaniofiori6528]

Hi. I have tried this, but unfortanely I could not succeed. I have used a Arduino uno and a nano. Checked out wire many times, checked code. No way and I do not understand why.

[@bedji]

can we use another pin to connecting the modul nrf24l01 or it is nessesary to use always the same pins ?

[@KrishVibe]

can i use it to transmit audio signal of guitar to effect processor?

[@mitropoulosilias]

what about sending a potentiometer value from a nrf to another nrf? i can send an on/off for a led but i do something wrong with pots..

[@singaporememorylane]

If there are several of this communicating at the same time on the same channel, will there be interference? I plan to make several battle bots all preset to the same channel, but just wondering if it will be an issue. Or should I make a toggle switch to toggle between several channels?

[@narayankhasnis2963]

Hello, Even I am using nRF24L01 for my project. But I am unable to receive data from transmitter.... Even though the all connection are fine And I am getting only some part of data. Not complete data!! Will you please help me? 🙏

[@vladimirzz93]

Hello, please I've got a doubt. I would like to connect 6 arduinos nanos to a main arduino due. I mean, like a star topology. How many of this wireless modules can I connect to ca main wireless module? Will it work fine?

[@Educ8s]

Yes, I think it will work but I have to check it.

[@dbzman7689]

Can I make one module transfer and receive?

[@ammarkhalil8304]

I'm facing a problem while compiling on my laptop running Arduino 1.6.8 while same code compiled on my Pc running Arduino 1.8.5. error is "invalid conversion from 'byte* {aka unsigned char*}' to 'uint64_t {aka long long unsigned int}' [-fpermissive] " help my figure out this problem. thnaks

[@manolejder]

Hi, It seems that the receiver nRF25 doesn't work. Whether the message on Serial Monitor for transmiter is ok, like in your tutorial, the message for receiver is: Package: 0.00 in a continous scrolling. Can you give me a help! Thank You!

[@aykutsirma7713]

I tried to make a joystick or button control wireless connection between two arduino communicate each other to open and close a led from x2 NRF24L01 modules' example; but I failed every time. Would you make a " joystick or button + led " example tutorial too please ? thank you very much.

[@diegolopez7657]

Hi I was watching your video but i dont understand why the compiler said that this " myRadio.openReadingPipe(1, addresses[0]);" cannot be used.

[@Educ8s]

Have you used the library from my link?

[@bingminerva]

hi, I have a project. I decided to use an Arduino Uno. My project will read the water consumption on an analog water meter using a flow sensor. The thing is, could it be possible to send the data reading through nrf24l01?? and stored in a database like ms access?? hope you could give me an advice on how to make my project happen. TYIA ^^

[@awsalmayah8023]

Dear Sir, I used two NRF24L01 + LNA + PA and two Arduino UNO to send simple data (energize / de-energize a LED), unfortunately there is no communication between the two modules, do you think that the problem is noise and I need to to use a specific channel?. Note: I used a tested SW for TX & RX, the SW worked good with another people before.

[@marouenbarhoumi4770]

thx for the tutorial, I wanna make a connection between PC and my arduino uno using nRF24L01 is it possible?

[@AgentOffice]

Sure use a USB one

[@jepp3183]

Hi, great tutorial! But i have one small problem. I copied everything you did in the video, and used the exact same code. My two devices can send and recieve signals, but they are pure gibberish . It just sends some random symbols, and prints them to the serial monitor. This happens on both the sending end and the recieving. I have confirmed that the recieving end is actually getting its data from the other device.

[@momomimo23]

Jeppe Allerslev check your baud rate... at the right bottom, there is serial monitor screen, choose the same as your code at serial.begin(9600). Choose 9600 if the code use that.

[@jepp3183]

THANK YOU! This finally solved my issue.

[@momomimo23]

Dont you have problems with the receiver though? I follow the video but having receiver problem. No data displayed on my receiver serial. I read in the comment section, they also faced the same problem but there is never solid answer to that...

[@jepp3183]

Sorry, no. Everything worked perfectly after you helped me with my Serial problem.

[@momomimo23]

Noted....

[@apoorvarampal8778]

I have done the exact connections, also have included the RF24 library, copied the same code, set the baud rate 115200 but still receiver serial COM port is showing nothing. I have used nrf24l01+PA+LNA , there is antenna mounted too. Also I am using Arduino IDE version 1.8.1. It will be helpful if you give a quick reply. And also I am powering these two boards through same laptop ports not using any power bank or additional power supply.

[@93Hangman]

I'm curious, how do you go about programming the NRF24L01 Wireless Transceiver? Once you plug it into the R3 Uno board, and then connect it to the pc, I'm assuming you use the software that comes with the board itself and then use the code that you provided in the video and go from there? Just trying to make sure I fully understand.

[@andreihuzum3260]

hello1 great video! i did the connection as u and i uploaded your code ,i set the in serial monitor 115200 baud and it doesn't work :(( can u help me please?

[@sachinagnihotri4182]

i am trying to make one small mesh network , but i am facing many problems . i want some guidance to make this projects. i have four nrf24l01 i want to connect all of them in a mesh such that if any of the module is in out of range data should reach at that module by another path in which it is connected.

[@jaykrishnarsakin263]

I want to use this for my project WIRELESS SPEED SYNCHRONIZATION OF DC MOTORS Can I???

[@oncledan282]

Good evening, all I got my new nRF24L01+, and I followed this video very carefully .. without success. Both modules does not seem to communicate between eachother. I am working mainly with Nano boards and connections are the same for this simple project. I checked the connections (Yes! 3,3V, not 5V.), the code is identical (Copied/Pasted it) and included all the libraries stated in the code. The transmitting side « seems » to be doing its job all right, but the at the receiver end, the condition « myRadio..available() » is never true and, consequently, the data never gets read. Do you have any idea why this is happening? Does the modules not have to be paired prior to the communication? I'm quite new in Arduino programming so, don't get into reading from and writing to the registers. All say it's a simple way to achieve communication .. but I fail to male it work, despite all efforts to do so. Could someone please help me get this going ? Thank you for your input. I am grateful to any help provided. Until then, you all have a nice day!

[@theodlab8639]

man you are greek?

[@phenostar571]

Very nice video thanks

[@peppebuscemi]

I really like your videos. Here a link to help you out with these modules, if needed arduino-info.wikispaces.com/Nrf24L01-2.4GHz-HowTo

[@Educ8s]

+peppebuscemi Thank you, really useful!

[@Eurus721]

I used 2 different transmitter units and 2 different power supplies. It seemed to only transmit when I hold my finger on either the CSM or MISO pins. Strange but i'm sure I'll find a bad jumper wire or something.

[@bissansaji]

how do i make the pipe???

[@arjun6136]

Hello my receiver part of the code isn't working. I'm using teensy 3.2 for it. Can anyone help me regarding this.

[@ethancatz5106]

how do i do this with a button and an led?

[@georgeanastasiadis6326]

if i put 2 nanos and no unos .. its the same ?

[@aravinthbosem3652]

thankyou so much brother

[@sayantanmaiti2513]

IF one NRF acts as a transmitter how many maximum NRF receivers we can use to get the data from the transmitter?

[@Joe_The_1st]

Guys!! If you couldn't run this code like me then all you have to do is cut the:" struct package { }; typedef struct package Package; Package data; " And paste it into the "void loop" and it should work fine. P/s: Thank you very much for this helpful video, but hope you will update this in the future ( i guess the update had changed something in the Arduino codes)

[@sameeransari-gq6fw]

hi ! i compiled the code and it worked fine in my case the problem is that it is working when the two modules are places closed to each other lets say 5 cm apart??? whats the problem can anyone tell me ????

[@sameeransari-gq6fw]

hi ! i compiled the code and it worked fine in my case the problem is that it is working when the two modules are places closed to each other lets say 5 cm apart??? whats the problem can anyone tell me ????

[@ДмитрийЛукьянов-м5о]

Hello. Can you help to write a sketch for Uno to control Nema17 (a4988) from ir remote. I need nema to do few step steps forward on 1 button, and same steps backward on another button. Please, i will really appreciate if you can

[@EldonTenorio]

Hi Nick, any advice why communication fails when I move the two Arduinos with the NRF24L01 modules away for only about one meter apart? Thanks in advance for the reply.