TUTORIAL: How to set up wireless RF (433Mhz) Transmitter Receiver Module - Arduino Quick Simple
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- เผยแพร่เมื่อ 29 มิ.ย. 2018
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This short video shows you how I set up an RF transmitter and receiver on the Arduino. It also explains how to encode/decode a string.
Library: www.airspayce.com/mikem/arduin...
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For anyone confused why the antenna should be 17,3 cm long ... its because it is approx. 1/4 of the wavelength of the carrier wave which is the optimum antenna length for transmission and recieving.
would it work if i make a spring with that length of wire?
@@f.a3202 Yes, that works too
**important note**
place a 100uF cap between VCC & GND close to the receiver. Any small ripple or noise or small abrupt changes in VCC will be amplified by the RX circuit and will show up as an output transition on the RX pin. This receiver is very sensitive and has poor power supply rejection ( very twitchy to noise on VCC)
W comment
I came here because I was looking for answers. You answered everything. Best voltage, best antenna arrangement, what about curly ones... All answered in entertaining informative content. Full marks. As a 23 year experienced software engineer your explanation of a const will stick with me forever. Legendary. :)
Thanks for this comment! Xxx
Thank you Antony. I've just started with Arduino and my first simple project is to use this module. I've found lots of detailed coding but no one who has simply explained how to add the code to the library, until I found you. So far I have only installed the library and not set the circuits up but I'm already exited to finally get this far. Thank you John.
I am using a raspberry pi but I still watched this for information and I wanted to comment that this is one for the better videos as there is no music over the voice (what a pleasant change) and it is also fully explained well
I struggled with this for like 1h but this video help me a lot! Thank you very much ❤
This is brilliant, thanks! I acquired 2 sets a few years back but at that time there were no libraries for them, and I had to write my own basic drivers for them, using them like a raw serial link was dodgy at best for me. This will let me get a lot more use out of them.
Thank you so much for this! I am currently using this module for a school project and I was not able to get it to work as needed until I got to this video.
Just to test it for myself, I put those little coil antennas on and got a few feet of distance! Made the length wire antenna you suggested and it's great! Thanks.
Do you know what I love about your channel? the content you create is practical and actually informative and useful. Keep it clear and easily understandable, cheers 👍
Thanks Mr Dosage! I try to make it this way. It's difficult running the channel though because some people like different things. It's taken me 18 months to understand what people like. Just under half of my subscribers seem to come here to see what interesting things I get up to - They seem to like quick/snappy/interesting/getting started/informative type videos - They come for interesting/fast/clear info. Just under half seem to use the channel for entertainment purposes - They seem to prefer the long/drawn out/boring/talking/chilling out type videos (The type which I personally don't watch). The remaining subscribers seem to split into another two groups; One group watches/likes all videos regardless of the subject, and the other group watches certain ones in order to pick faults - presumably in order to make themselves feel better... LOL. If you can give me any feedback on this, that would be great!
Antony Cartwright can u start a car for this
Good Tutorial. Many thanks !
you can change the communications speed by the way
lower speed = less errors = longer range = longer message time
i tested speeds as low as 25 bits/sec , works but takes forever to send few bytes
Very good tutorial, thanks. I ended up using the HT12E and HT12D, encoder and decoder chips, to process the serial data into bytes, check address etc then connected the data busses, xmt and receive to Arduino pins, works well. You commented the code was unnecessarily complicated, with these chips no library is needed just pinmode settings, digital write and read. The decoder chip has a VT pin, valid transmission pin you can monitor in the loop section to see if a transmission is coming in.
He was commenting that the C/C++ syntax for a string constant (const char * ...) seems unnecessarily complicated, rather than the library. The Holtek (HT12E / HT12D) chips seem like a good way of doing it though. I looked into using them years ago but never got around to actually building something with them. If I manage to find them, I'll give it another go.
Fantastic presentation. cheers
Great tutorial. Thanks!
For those who use Uno (16Mhz) and mini (8Mhz) like I did, remember to set your uno speed to half. UNO: RH_ASK driver (1000, 11,12,10); Mini RH_ASK driver (2000, 11,12,10);
Thanks 🙏 all the best from Angola 🇦🇴
Thanks!
Great video, thanks. For a better result I recommend investing some more money in a better receiver called RXB6. The RXB6 is a superheterodyne receiver and has a much better sensitivity and you will get a better range. Don't forget the 173mm antenna on both the transmitter and receiver.
Thank you for this helpful video
very well put togeather and exsplaining!
I've been looking into making a wireless on/off rocker switch set up for the light bars in my truck. I'm wondering if this type of an rf switch would work to power on and off the lights without running wires into the cab. (Ie. Transmitter in cab receiver under the hood to control more then one like) is it possible to do with these?
the antenna part is excellent. tnx..
12:13
ampersand means 'address of'.
(pointer points to first byte of value.
the function expects a pointer on first variable and expects a pointer on second variable too.
pointer holds an address of memory)
because normal variable used (not a pointer to dynamically allocated memory).
to get something that is like a pointer of from a variable.
we ask for address of that variable , where is it where it stores the value.
You should also be able to use shorter antennas that are equally effective as long as their lengths are exactly 86.5 mm or 43.25 mm (173/2 and 173/4, respectively (42.35 mm ~ 433 Hz).
Excellent explanation. I like it. Thanks
Thanks for the explanation, big help 👍👍👍
I'm testing a similar setup, have the transmitter on a nano with 6v and a cheap Baofeng radio with a 433mhz yagi and on a good day with line of sight I can get over 1km reception. I know that's not exactly what you're using but just to add a bit more info to the discussion.
Hi is there a tutorial for that for a beginner?
Is the yagi home made ? Can you provide a link to a drawing or sketches?
I think I may have bought these in error yesterday. Can you send raw data through like a video feed, or even 2 devices on 2 different frequencies to send usb data?
Hi Antony, can yo do this link insted of arduino nano, but attiny85? And then is it possible to drive two brushed dc motors back and forward at the same time for drift?
Does the aerial wire need to be straight or can it bend within the enclosure?
Great video! Your long explanation really helps!
does the reciever know which transmitter to be listening for? ... can one transmitter drive 2 or more recievers by accident for example?
you make good quality videos and the very easy to follow and helpful thank you how do you not have 100k scribers
Thanks Nick!
Very nice and briefly defined. can you please tell If I want to use Only Receiver and get to know what my Fan remote is transmitting? I want to control my fan using Arduino but instead of my Fan remote I want to transmit that frequency from Ardunio, how it can be done?
So understanding this. I could use a magnetic reed switch to trigger sending say 13579, the other receives it, an if command reads the 13579, triggers a servo. And seeing i could do that once, i could send a seperate message with a second magentic reed switch to send 02468 to send a separate message to trigger the second servo?
literally day 1 of coding for me here
i want to make my own transmitter receiver module with which crystal oscillators to use, i haven't yet found a vid to explain it, that would be cool if you made one
Sir i tried to use this as to make my project but everytime i put another if statement inside the if statement its my led output is not function and also the transmiter send messgae and the receiver accept it and then the led output please help 😭😭😣😣😣😣
is there something I should consider when the transmitter is connected to my arduino mega and my receiver to an esp32?
It works with the regular blink code on the transmitter an your code on the receiver both on pin 13 but your code on the transmitter an receiver doesn't work,I opened the serial monitor an even solidered on antennas but nothing gets transmitted,what could I be doing wrong?
Can I read ultrasonic data and send it through this system? and what is the maximum distance with this? I need to know this urgently thank y o
Hi, i want to use 4 transmitter with one receiver. Do you think it is possible? Any interference problem?
Could this concept be used with the turn signal signal For instance if the turn signal is activated the transmitter will send signal to reciever indicating that the turn signal has been activated ??
Very very good presentation :)
Thanks!
New subscriber always watching yourvideos ❤thanks for sharing
Hi
How can i send a string that have 24 byte 0&1 by rc switch transmiter
How can I pair other covered rf remote control with this module
Can you tell me what the current consumption of receiver module when ideal ON but not receiving anything?
How much power does the transmitter consume?
I want to control two stepper motors with joystick and using 433Mhz Rf to make Wireless control.. So how can i change this code to work with my project?
can the data become forward and reverse output ? if we want to add an esc or motor
how to multiple RF(433Mhz) Transmitter Receiver module work in one place.beacause when i sent data the receiver end another receiver working that time.have you got some tips??
Amazing video, but I still can't get either my receiver or transmitter to work at all. Do you have advice for how to test each individually to try and isolate the problem?
hi, in the small module i have missing the small coil, only have the bigger one, is it an important missing part?
Thank you, Can you make a video using the SRX882 & STX882 V1.3
because they need just 3.6V
Best regards.
Hamza Lee hey, I'll try!!! I have those I think!
Can I use a esp32 as transmitter And arduino uno as reciever?
Nice info, thanks :)
im building a high altitude rocket, how can i get the range to 40,000+ feet?
wait so it is data vcc and gnd? I've put vcc on data and data on vcc then. but it still worked. now i tried it like in the video and it still works fine. What is this now, how is it possible?
thanks alot bud,
Can you explain the 433 mhz transmitters and receiver module circuit diagram
Super video!!!!
Will this work with RFID tag like Key FOB?
Hi Great video!! Hello, anyone knows if its possible to use this 433Mhz receiver to receive commands from Key Garage transmitter?
Hey I really like your video! Pretty much exactly what I need right now - unfortunately I am very dissatisfied with the audio quality. I'd be happy to help you reduce the clipping, I think you can add another audio track in the youtube studio editor, so I could just send you the edited audio file in same length!
Hey, thanks. Unfortunately, at the time when I was recording those videos, TH-cam wasn't paying me enough to warrant buying decent equipment. It was just me making free videos for people. Things are changing now, and so will my equipment. 😀
Great video, I have a question for transmitter. I don't want a arduino for transmitter and send fixed message for only error exception. For example "Door number 2039 is open". Is there a module you can recommend
ATTINY85?
What distance does it cover?
what to do when there are two transmitter and one receiver ? How to distinguish which one is nearer to the receiver?
Hi, Nice video.
I bought some HC12 433mhz transceiver modules that I am hoping to use to link my pc with my drone so I can upload code remotely. Have you done anything link this before, or do u know if it is possible and what level of coding is involved. I am using an arducopter APM flight controller.
Andrew Walsh interesting idea, would love an update on your project!
Great video, but my circuit doesn't seem to be working. Could it be because I'm using a Mega instead of a Nano or Uno?
No...99% not
have you tried to read any sensor values with the arduino mega before? if it works and you can see the value clearly then i think the problem is either in the transmitter or the receiver
best video of this type
Thanks!
Hey, great video..
I m trying bidirectional communication using these sensors.
I have a transmitter and receiver on remote and a transmitter and receiver on robot.
The robot will send the battery voltage to the remote, (only if the voltage is in acceptable limit the remote should work), then the remote will send command to the robot to move (forward backward sideward etc).
I m doing this using arduino nano but bidirectional is not working.
have you tried bidirectional communication, is it working?
@@saulpayan1171 there is an inbuilt example (reliable datagram) with the library which does bidirectional communication. You can try that. I was able to achieve it.
nice one!
hi
Thank you Antony
I didn't try on Uno but it doesn't worked on esp32
can you teach the code on how to send sensor data to receiver
Can I give the received to a speaker ?
Mine is not working and I got the reciver that is adjustable I think that is the problem but I am not sure???
Good explanation, But at some point the video starts to lag a long way behind the audio., which confused me..
stuartajc you're right. :(
I am your biggest fan
Awesome!
Could you provide links to some transmitters and receivers please ?
Hello guys i have one question .. is this device enough to make a relay attack on cars?
Great video.
I've been looking at how to get weather data from my external weather station to my internal display. This looks like a great way to do it. If I were to use an ESP8266 or ESP32 for the MCU, would there be a better way ( Internally with the ESP's capabilities) to communicate betwen them rather than the RF(433Mhz) unit?
I noticed that while you were going through the library there was mention of the ESP8266 MCU.
Hi William, do you want to communicate with the external weather station to the ESP32 wirelessly or with wires? Because you could use the simple serial communication between the two sides, or, depending on your range, you could use LoRa modules for long range wireless communication. It depends on the setup you have.
I'd like to do it wireless. But I'm looking for a way of doing it within the capabilities of the ESp's rather thn having to add extra devices. Same is true of LoRa. I think you need to have an extra LoRa server for this to work. There must be some way to have the ESP's talk to each other over either over my WiFi orto each other directly!
William Miller So you will then need to have two ESP32 boards. One of the boards will be hooked up to the outside weather station to get the data and transmit it to the other board inside, where it can display the data. Since the ESP32 has WiFi capabilities, no external modules will be needed. I’m sure that there are many videos you can find about this online.
Kal King, I'll give it a try. Thanks.
William Miller yes, with two ESPs, it's fairly easy. You can do this easily if you have a router by putting both into wificlient mode. Then just get the IPs and send/receive data. You can also make one ESP into an access point of you like... This will also work if you have no router...
Can this be done with a raspberry pi 3b?
How can I have 2 of these set up near each other without them interfering with each other?
can we use node mcu with this code
hey i dunno why but i got an error with my transmitter
C:\Users\knoxt\AppData\Local\Temp\arduino_modified_sketch_890292\ask_transmitter.pde: In function 'void setup()':
ask_transmitter:16:10: error: 'driver' was not declared in this scope
if (!driver.init())
^
C:\Users\knoxt\AppData\Local\Temp\arduino_modified_sketch_890292\ask_transmitter.pde: In function 'void loop()':
ask_transmitter:28:5: error: 'driver' was not declared in this scope
driver.send((uint8_t *)msg, strlen(msg));
^
exit status 1
'driver' was not declared in this scope
that was the error code
Does anyone know if there is a way to use RF with only one arduino?
Does the circuit have a delay?
The receiver board in my weather station has died it operates on 433 mhz and uses an lm358 op amp the same as this board 3 connections ground data and vcc will that receiver board be able to replace mine they look very similar?
The receiver is just a tuned circuit, so there is no reason why it shouldn't work, other than the tuning of the circuit via the variable inductor.
Can i have a copy of your weather station project sir?
Nicely done. I must point out a few things, only for elucidation purposes.The aerial should always be straight and lol you take out the variable initialisation of i, then use i. Good practice and one that is defined in MISRA is that all variables be initialised with a value. I also like the way of naming variables, so you know what the variable is. take buff, if it were renamed to ui8Buff, you would know it is of type uint8. Not hard to say in a little program, but you get into longer lengths, someone else reading it will know instantly what type it is.
Could you put a larger antenna on the receiver to gain further range , only currently getting about 15m from these
Buy a better receiver like RXB6. More expensive but a lot better. Don't forget the antenna, 173 mm on both transmitter and receiver.
Does it work with a Raspberry pi pico too?
This should work without antennas shouldn't it? And if it does i have a question about why is my printing so slow instead of 0.2 seconds like with yours it takes me 5 seconds or more just to print one.
It's supposed to have an antenna of an extract length, from what I remember. To be honest though, these modules are not very good quality.
can you wire it without arduino
can you transmit music?
Kitne metar pe kam karta he
Nich video i like this is video
whether this transmitter receiver pair can be used for making a walkie-talkie? i mean with two pair of transmitter-receivers? If not, please give me a brief explanation. I am novice in RF communication, but i know about voltage, current & arduino.
These modules can not be used for walkie- talkie. The max bit rate is less than 2000 bits pr second. So their primary use is remote control of lights, garage doors or door bells etc.
@@oladunk9986 thank you.
So this is what shown in the serial monitor after i follow all the steps mentioned in the video
ets Jan 8 2013,rst cause:4, boot mode:(3,6)
wdt reset
load 0x4010f000, len 3460, room 16
tail 4
chksum 0xcc
load 0x3fff20b8, len 40, room 4
tail 4
chksum 0xc9
csum 0xc9
v00043250
~ld
Good content man great vid quality now put a little bit of foam over the mic. Try to warm that sound up a bit.
It's a really crappy built-in Mic... :( oh! I've just had an idea though..
Using a wireless mic? Maybe a 433mhz type haha. Ps if you have time I have a project I'm working on I'd like your input on?
@@thompascoe8463 my camera doesn't allow external microphone. :(
The out of sync audio kinda throws me off during the coding a bit. :')