Using arduino Nano, and running Win10. There were some error messages in the "Processing" 3.2 version. After downloading the 3.1.2 it just worked. Very fine and simple tutorial - many thx
RS232 is +/- 3 volts to +/- 15 volts. Not flat 0 or 15. The MAX 232 and MAX 234 ICs were used in programming cables and RIBs to program older commercial 2-way radios and cellular phones. Today the MAX232 series ICs are used in A/V gear when you can interface with a 9 pin serial port like on a DVR for CCTV or the programming port in some satellite TV digital receivers. They are being phased out by the USB versions though.
Standard functions in Processing are setup() and draw(). The draw() function is called right after setup() and automatically loops unless you tell it to stop.
The Processing listing shown in this demo, does not work on version 2.1. If you change the last line: brightness = float(port.readStringUntil(' ')); To: brightness = float(port.readString()); it does work. FYI I am running win8.1 64bit.
The port will depend on what one your Arduino has chosen to use, it might be COM4 or some other one, but to get the console like he has on his screen, you can either use the button on the far left of the sketch window (it looks like a magnifying glass) or use the keyboard shortcut Shift-Command-M, when in the Arduino application.
char val; void setup() { Serial.begin(9600); } void loop() { while(Serial.available() == 0); val = Serial.read(); Serial.println(val); delay(50); } I think this will work even beter than your code because it works with lethers and number and etc. P.S love your tutorials!!!
Marvellous explanation about using pods with processing and windows!! Thanks a lot, internet is God.... I was all day long fighting with processing about data sent by arduino by serial port, but didn't found a solution until I found your tutorial... :)
Also if your asking about the later example then replace his line of code with this: port = new Serial(this, Serial.list()[COM PORT HERE], 9600); in the brackets try 3 or 4 it usually is one of those two, though there are ways to check.
Take a look at the X-Plane SDK. It should give you the properties that you need to write/read to change the throttle. Then take raw data from the pot (via analogRead) and pass that into X-Plane via their API. I haven't done it in X-Plane, but I have in MSFS/Prepar3D. It's pretty straightforward. You need: 1) Input from pot 2) App to grab input and load it into X-Plane 3) API call with variables to read/write in X-Plane. Try to use 10-bit ADC, as 8-bit is probably not enough resolution.
I also had problems with flushing the serial buffer. After many attempts, printing "invalid" only once works with this: int ledPin=13; void setup() { pinMode(ledPin,OUTPUT); } void loop() { Serial.begin(9600); while (Serial.available()==0); int val=Serial.read()-'0'; if (val==1) { Serial.println("Led is On"); digitalWrite(ledPin,HIGH); Serial.end(); } else if (val==0) { Serial.println("Led is Off"); digitalWrite(ledPin,LOW); Serial.end(); } else { Serial.println("Invalid!"); Serial.end(); } }
you are running it in beta version. try running it in older processing 1.5.1 for example. I had same problem first but i change it to older version and it work like a charm.
You talk really fast! Not that there's anything wrong with it though as your voice is very clear and I have no problem understanding you as a foreigner.
The following proposition for serial.flush() replacement: while(Serial.available()[GREATER-THAN]0) Serial.read(); does not works exactly the same way as expected. Some signs slides out. I read that it could be great idea to put delay(50) before it. It's better but still doesn't work properly, especially with long strings. My proposition is a little more extended but it works perfectly: delay(10); while(Serial.available() [GREATER-THAN] 0){ Serial.read(); if (Serial.available() == 0) delay(10); } }
I am just learning the Arduino library myself, but it doesn't appear that you can (this way). The read() method separates a serial stream into bytes and returns the first byte in the buffer. So as long as you are reading from the buffer in a loop, it will continue reading those bytes. You have to implement your own function to read data up to a CrNl, and combine and display all those bytes. The library is "Serial" so you have to do some extra processing. Using AVR Studio makes this a bit easier.
If you go to the Arduino site, it tells you that prior to Arduino 1.0, Serial.flush() would remove any buffered incoming data. So, this means you will have to do the checking on your own from what I can tell.
In my case, a small delay was needed when trying to flush the buffer: delay(10); // give some time for the rest of the data to come in while (Serial.available() > 0) { Serial.read(); }
@sciguy14 I found it easier to send a letter, then the value, then use a case switch argument to read it to a different variable according to the letter sent.
For all of those that ====>> while(Serial.available()>0){Serial.read();} ==> dont work try adding a delay before this line: delay(50); while(Serial.available()>0){Serial.read();} hope this help :)
Just to chime in, when entering the serial port on linux for processing3, I used: port = new Serial(this, "/dev/ttyACM0", 9600); and it works. ttyACM0 could be different for other people but should be written on the arduino IDE
Thank you very much for these tutorials, they've taught me a lot. If I'm plugging an RFID reader into the rx pin on the uno, when programming would I use serial differently to ensure it communicates with the rx pin and not with the computer??
Jeremy Thanks for your excellent series! You're clearly gifted with superlative teaching skills, so I hope you manage to continue to bless the rest of us with that talent (which, I believe, extends well beyond the scope of whatever topic is at hand directly). Anyway, as this particular video is so long in the tooth, one can hardly expect you to be staying atop comments to it THIS far down the road -- BUT -- Might I ask, as you have inserted the _minor_ aside herein of integrating Processing -- would you perhaps shed a little light on WHY??? What does it bring to the table that one cannot do with Arduino's given environment? The fact that Arduino's was built on Processing in the first place makes me wonder - did they dumb it down significantly so that you "can't get there from here?" (always loved that paradoxical muse) No big deal, of course, but IF you happen on this AND it's quick and painless??? Thanks again, and keep up the good work!
This was a great tutorial ! Serial Communication is really interesting, i hope you will do some follow up videos with more stuff to experiment with using serial communication!
Please annotate the part where you talk about the voltage/pins of the connection, because it couldn't be more misleading. While USB may have 4 pins, it doesn't have RX/TX. RS232 on the other hand has RX/TX, but doesn't have 4 pins or power. You're mixing USB and RS232 together. This could lead people to think they can simply connect TX/RX to pins of USB and possible fry their USB port or the device on the other end. You either have a real serial port, which uses around +-15 volts. This means you'd need a logic level converter to talk to a microcontroller. Or you've got USB, which needs an USB-to-serial converter, which is a totally different thing. In this case there's no level shifting at all because you never have something else than 0 and 5 volts.
Hello, I am new in Arduino world and electronics. I have Arduino Mega2560. I have a USB to serial converter on my laptop and connected directly Serial Pin 2 to Arduino Tx0, Serial Pin3 to Arduino Rx0 and Serial Pin 5 to Arduino GRD. I executed the simple program shown on the video but I get no communication. Is this approach correct? Do I need another converter in between or is there any other wire which is not connected? Any help will be appreciated.
My question is.. I have 5 string variable Sting price; String set_count; String set_ml: String set_time; If( Serial. Available () ) If i am sending through serial "price 220" So how to store this into price variable If sending "set_ml".. How to store in set_ml variable. And so on... I hope you're getting my point???
Excelent tutorial, but i have a question ... i'm trying to read 2 analog pins at the same time and read it by Labview .. i already did it with one ... how can i do it with 2..? can u help me?
If you have no logic to be performed while that value you can exclude the scope definition of the while (the {} bracket segment). This is along the same lines as to how the compiler will convert the following: if( variable == 1) doSomething(); is logically treated as: if(variable == 1) { doSomething(); }
I had a problem with that program. If I entered more than one digit, I've received message for each character even with flush. Turns out, that there wasn't enough time time to receive all the characters in the buffer. I've fixed this by adding 10ms delay after the while loop.
You can make short circuit between supply voltage and ground by configuring your circuit like this. Maybe it's better to make voltage divider and sense the signal from there. :) Great tutorial, very motivational i appreciate it very much! :) Subscribed!
hi great tutorial but how can i get say some dials to read out some values? really id like some graphs too and be able to arrange the space and make boxes with nice background and then pack into an exe. id even like to rename the driver too so it says whatever the project name is. thanks
Where do we need to put that? I put it (while(Serial.available()>0) Serial.read();) at the bottom of the loop instead of the flush but it doesn't seem to change anything.
Finally, a serial tutorial where the guy knows what he's talking about! I've watched a bunch and most are just noise pollution. Thank you!
a serial tutorial where the guy knows what he's talking about! I've watched a bunch and most are just noise pollution. Thank you!
Select "no line ending" in the drop down menu located beside the check boxes in the serial terminal window
Excellent set of tutorials! It's guys like you that make the internet what it should be! Thanks for taking the time and trouble.
I wrote a command parser. Took me a couple of headaches, but now it works and I have my LED dynamically blinking in all kinds of ways :D
Using arduino Nano, and running Win10. There were some error messages in the "Processing" 3.2 version. After downloading the 3.1.2 it just worked. Very fine and simple tutorial - many thx
These tutorials are awesome. Thank you, Jeremy!
RS232 is +/- 3 volts to +/- 15 volts. Not flat 0 or 15. The MAX 232 and MAX 234 ICs were used in programming cables and RIBs to program older commercial 2-way radios and cellular phones. Today the MAX232 series ICs are used in A/V gear when you can interface with a 9 pin serial port like on a DVR for CCTV or the programming port in some satellite TV digital receivers. They are being phased out by the USB versions though.
your tutorials are great because they explain exactly the things i need to solve my problems :)
Standard functions in Processing are setup() and draw(). The draw() function is called right after setup() and automatically loops unless you tell it to stop.
doesnt matter I didnt have the serial communication set up right, I now have it on "No line ending" and it is working perfectly :)
The Processing listing shown in this demo, does not work on version 2.1.
If you change the last line:
brightness = float(port.readStringUntil('
'));
To:
brightness = float(port.readString());
it does work.
FYI I am running win8.1 64bit.
thanks so much! that fixed it for me :)
The port will depend on what one your Arduino has chosen to use, it might be COM4 or some other one, but to get the console like he has on his screen, you can either use the button on the far left of the sketch window (it looks like a magnifying glass) or use the keyboard shortcut Shift-Command-M, when in the Arduino application.
USB is 0V and 5V. He was referring to RS232 specs. Valid signals are plus or minus 3 to 15 volts.[Wikipedia]
char val;
void setup()
{
Serial.begin(9600);
}
void loop()
{
while(Serial.available() == 0);
val = Serial.read();
Serial.println(val);
delay(50);
}
I think this will work even beter than your code because it works with lethers and number and etc. P.S love your tutorials!!!
Marvellous explanation about using pods with processing and windows!! Thanks a lot, internet is God.... I was all day long fighting with processing about data sent by arduino by serial port, but didn't found a solution until I found your tutorial... :)
You speak very fast for me, I do not know English. But this genius will put into practice your explanations thank you very much
Also if your asking about the later example then replace his line of code with this:
port = new Serial(this, Serial.list()[COM PORT HERE], 9600);
in the brackets try 3 or 4 it usually is one of those two, though there are ways to check.
10 and 13 are 'carriage return' and 'linefeed'. They are sent with println command.
Take a look at the X-Plane SDK. It should give you the properties that you need to write/read to change the throttle. Then take raw data from the pot (via analogRead) and pass that into X-Plane via their API. I haven't done it in X-Plane, but I have in MSFS/Prepar3D. It's pretty straightforward. You need:
1) Input from pot
2) App to grab input and load it into X-Plane
3) API call with variables to read/write in X-Plane.
Try to use 10-bit ADC, as 8-bit is probably not enough resolution.
I also had problems with flushing the serial buffer. After many attempts, printing "invalid" only once works with this:
int ledPin=13;
void setup()
{
pinMode(ledPin,OUTPUT);
}
void loop()
{
Serial.begin(9600);
while (Serial.available()==0);
int val=Serial.read()-'0';
if (val==1)
{
Serial.println("Led is On");
digitalWrite(ledPin,HIGH);
Serial.end();
}
else if (val==0)
{
Serial.println("Led is Off");
digitalWrite(ledPin,LOW);
Serial.end();
}
else
{
Serial.println("Invalid!");
Serial.end();
}
}
Wow! Man I hope you’re making serious bucks. Very useful and hit the mark without sliding off topic. Very well done.
Jeremy, you are the RORY McIlroy of the Arduino world. Awesome videos ! Thanks.
20 mins are too short !!!
I want more of this tutorials....your awesome !!!
Whoaa!! Google used to look like this before in 2011!! Well its amazing
@2BeN3 Serial.flush() in Arduino 1.0 has changed. the new syntax is (Serial.available()[GREATER-THAN]0)
{
Serial.read();
}
Glad I could help
you are running it in beta version. try running it in older processing 1.5.1 for example.
I had same problem first but i change it to older version and it work like a charm.
I watched your tutorial from 1 up to this, I just wanna say thank you so much bro for making this tutorial, I learned a lot from you. Good day man!
Your video series has helped me more than once. Thank you very much for your practical help!
Finally, a serial tutorial that is actualy useful ;)
You talk really fast! Not that there's anything wrong with it though as your voice is very clear and I have no problem understanding you as a foreigner.
49 is the code for the character "1".
10 is the code for newline.
You are hitting the enter key.
The following proposition for serial.flush() replacement:
while(Serial.available()[GREATER-THAN]0) Serial.read();
does not works exactly the same way as expected.
Some signs slides out. I read that it could be great idea to put delay(50) before it.
It's better but still doesn't work properly, especially with long strings. My proposition is a little more extended but it works perfectly:
delay(10);
while(Serial.available() [GREATER-THAN] 0){
Serial.read();
if (Serial.available() == 0)
delay(10);
}
}
Muy bien explicado y preparado el vídeo. Espero que continúes realizando mas.
Finally a " no nonsense " tutorial...Thank you so much...
Hi there sciguy14 :)
Big THX for tutorial, btw - in your tutorial you can use:
background(brightness);
instead:
background(0,0,brightness);
I am just learning the Arduino library myself, but it doesn't appear that you can (this way). The read() method separates a serial stream into bytes and returns the first byte in the buffer. So as long as you are reading from the buffer in a loop, it will continue reading those bytes. You have to implement your own function to read data up to a CrNl, and combine and display all those bytes. The library is "Serial" so you have to do some extra processing. Using AVR Studio makes this a bit easier.
If you go to the Arduino site, it tells you that prior to Arduino 1.0, Serial.flush() would remove any buffered incoming data. So, this means you will have to do the checking on your own from what I can tell.
great, comprehensive instructions, clear instruction and great exlpaination of the parts of the programming. awesome work.
Perfect! :) all tutorials should be just like this!
It doesn't come up automatically, but Ctrl+Shift+M or (Tools-->Serial Monitor) gives you the window. Pretty easy!
At the bottom of the serial monitor window there is a dropdown box.
It probably says "newline". Change it to "No line ending".
Ffff!!!
Gotta love you dude!!
I'm soooooo learning A LOT from you than reading some shiz on arduino website XD
*watches next episode*
I had the same issue too. The way to fix this is to get the 32-bit version of Processing. I hope this helps you.
Doesnt feel like it was made in 2011 .Very good.
This got me excited! This really opens up some doors.
In my case, a small delay was needed when trying to flush the buffer:
delay(10); // give some time for the rest of the data to come in
while (Serial.available() > 0) {
Serial.read();
}
@sciguy14 I found it easier to send a letter, then the value, then use a case switch argument to read it to a different variable according to the letter sent.
For all of those that ====>> while(Serial.available()>0){Serial.read();} ==> dont work
try adding a delay before this line:
delay(50);
while(Serial.available()>0){Serial.read();}
hope this help :)
i really like how you teach thank you for these videos
Just to chime in, when entering the serial port on linux for processing3, I used:
port = new Serial(this, "/dev/ttyACM0", 9600);
and it works. ttyACM0 could be different for other people but should be written on the arduino IDE
excellent delivery . thanks Jeremy .
Thank you very much for these tutorials, they've taught me a lot.
If I'm plugging an RFID reader into the rx pin on the uno, when programming would I use serial differently to ensure it communicates with the rx pin and not with the computer??
I had the same problem. Someone suggested to download 32-bit version of Processing and it it worked.
why is my output coming like this
1
-38
2
-38
use No line ending
@@davidtapia5492 still does it but just on the same line 1-382-383-38...
Oh I got it. Select No line ending in the serial monitor.
my LED doesn't turn off if I typed 0, why?
Jeremy
Thanks for your excellent series! You're clearly gifted with superlative teaching skills, so I hope you manage to continue to bless the rest of us with that talent (which, I believe, extends well beyond the scope of whatever topic is at hand directly).
Anyway, as this particular video is so long in the tooth, one can hardly expect you to be staying atop comments to it THIS far down the road -- BUT --
Might I ask, as you have inserted the _minor_ aside herein of integrating Processing --
would you perhaps shed a little light on WHY??? What does it bring to the table that one cannot do with Arduino's given environment? The fact that Arduino's was built on Processing in the first place makes me wonder - did they dumb it down significantly so that you "can't get there from here?" (always loved that paradoxical muse)
No big deal, of course, but IF you happen on this AND it's quick and painless???
Thanks again, and keep up the good work!
Had the same problem... I just downloaded the 32-bit version and it worked fine
Serial output and input may should have to be a string
So it might be the ascii value
This was a great tutorial !
Serial Communication is really interesting, i hope you will do some follow up videos with more stuff to experiment with using serial communication!
Thank you for the tutorial Jeremy.
The tutorial still great at 2018 !! Thx Bro !!
Please annotate the part where you talk about the voltage/pins of the connection, because it couldn't be more misleading. While USB may have 4 pins, it doesn't have RX/TX. RS232 on the other hand has RX/TX, but doesn't have 4 pins or power. You're mixing USB and RS232 together. This could lead people to think they can simply connect TX/RX to pins of USB and possible fry their USB port or the device on the other end.
You either have a real serial port, which uses around +-15 volts. This means you'd need a logic level converter to talk to a microcontroller.
Or you've got USB, which needs an USB-to-serial converter, which is a totally different thing. In this case there's no level shifting at all because you never have something else than 0 and 5 volts.
Hello, I am new in Arduino world and electronics. I have Arduino Mega2560. I have a USB to serial converter on my laptop and connected directly Serial Pin 2 to Arduino Tx0, Serial Pin3 to Arduino Rx0 and Serial Pin 5 to Arduino GRD. I executed the simple program shown on the video but I get no communication. Is this approach correct? Do I need another converter in between or is there any other wire which is not connected? Any help will be appreciated.
you have to use TTL to RS232 Converter
press Crtl+Shift+M or go to tools -> Serial Monitor
@hugosdominoes If I'm not mistaken, you need to your a char array.
@sciguy14. Start this video, and turn on audio transcribing, then read the first few sentences of what it transcribes. HILARIOUS.
Could you please do a tutorial on programming with any gyroscopes using serial communication with MOSI/MISO! thanks .. great videos.
Thank you Jeremy! The contents are really cool!
I watch these videos at 0.75 speed and I am not ashamed.
helped so much! this is way better for learn than go to class :D!
remark: serial.Flush() has changed over time and does not flush the data from buffer but rather stops transmission thereof.
cordial saludo Jeremy Blum desde colombia y felicitaciones por esos videos interesantes.
I wish you were writing and doing new videos explains more about setting up multiple inputs and puts and interfacing ai into the logic of the program
Appreciate into to Processing. I expect I'll be using it to visualize Data Logging projects.
Again you rock on these tutorials
You are very talented! Fantastic!
problem with Serial.read() -'0' is it will only work for numbers 0-9, no double digit numbers
The serial library in Processing is not compatible with 64 bit. Just download and use the 32 bit version.
Go to serial monitor and change to "No line ending" in the bottom
My question is.. I have 5 string variable
Sting price;
String set_count;
String set_ml:
String set_time;
If( Serial. Available () )
If i am sending through serial "price 220" So how to store this into price variable
If sending "set_ml".. How to store in set_ml variable. And so on... I hope you're getting my point???
Excelent tutorial, but i have a question ... i'm trying to read 2 analog pins at the same time and read it by Labview .. i already did it with one ... how can i do it with 2..? can u help me?
Great demonstration, thanks.
Got the flush working placing the delay before the while.
Thanks for focusing the screen shots. Try and do the same for other videos too.
I am following your example, the color of the screen will not change. How does Processing know what data to collect?
how to open that java com3 window in computer
In your Sketch, go to tools and Serial Monitor
I changed the program as you need to ckeck the input buffer for valid items and dumped others
The LED does not light up completely. You must give a hard output. pinMode(13, OUTPUT);
If you have no logic to be performed while that value you can exclude the scope definition of the while (the {} bracket segment).
This is along the same lines as to how the compiler will convert the following:
if( variable == 1)
doSomething();
is logically treated as:
if(variable == 1)
{
doSomething();
}
Remember the "();" at the end.
After 10 years i am watching.
You can also just use
Serial.parseInt(), Serial.readString() :]
@sciguy14
not to sound like a perfectionist, but USB isn't RX/TX based, it is DATA+/- based
DATA+ != DATA-
they weren't referring to the arduino ide but rather the processing ide.
oh and to fix the error download the 32 bit version of processing
I had a problem with that program. If I entered more than one digit, I've received message for each character even with flush. Turns out, that there wasn't enough time time to receive all the characters in the buffer. I've fixed this by adding 10ms delay after the while loop.
Сергей Мациевский i got the same problem... and sorry again how did you fixed this?
I'm still not sure what the difference is between "=" and "==".
I don't have my arduino yet, so i'm still a little confused.
You can make short circuit between supply voltage and ground by configuring your circuit like this. Maybe it's better to make voltage divider and sense the signal from there. :)
Great tutorial, very motivational i appreciate it very much! :) Subscribed!
yeah...was thinking the same...
OMG, how did I live before arduino! This is the coolest. Thank you Jeremy!
hi great tutorial but how can i get say some dials to read out some values? really id like some graphs too and be able to arrange the space and make boxes with nice background and then pack into an exe. id even like to rename the driver too so it says whatever the project name is. thanks
This is genious. You, my dear sir, is a genious.
The serial.flush() isnt working for me. It is still sending multiple "invalid" messages. Anyone else facing such a problem? How to fix it?
+Sankhalika Mukherjee Read the note in the description. It says that the Serial.flush() function has changed
USE
while(Serial.available()[GREATER-THAN]0)
{
Serial.read();
}
Where do we need to put that? I put it (while(Serial.available()>0) Serial.read();) at the bottom of the loop instead of the flush but it doesn't seem to change anything.
Seems to help if you add "delay(100);" before the while command. Not sure why.
RetroRobotRadio
Thanks, that works.