arduino clear serial monitor


Whilst there are many ways to send and receive information to them from a microcontroller and the computer, using the serial port is by far the easiest. The AC mega three to a chip has a uart port denoted by the TX and rx pins on the board, which can send and receive serial data. 0 means the bits are sent one by one thousands of times per second, depending on what your rate is configured as the serial port is connected to the USB port on the board. So we can use the built in serial function and data to the serial monitor. In the Arduino IDE or an external serial monitor, using the same circuit that you built before will add lines at the end of the loop to print out the values of all our different senses and outputs to the serial monitor, and this will take everything you’ve learned In this chapter, including global and local variables, digital and analog, pin functionality and, of course, Syria monitor let’s, take a look so I’m going to build this code back up so that we have all of our pins configured so I’m, going to re, add in here button Pin and equal to 2 3 configure pin no again and variety now. What we want to do is we’re. Reading the value of a potentiometer let’s take a look at the source code to this one, so you can see that there’s a little bit to it. Now.

I’M, going to show you how to actually copy code that isn’t formatted correctly into the Arduino IDE in step to fall out properly because it’s a useful skill to learn it’s, not related to serial monitoring but again, very useful. So whilst we get this short code block fixed in the section resources, we’ll take that I’ll actually just copy it straight into the Arduino IDE and you can tell it’s not formatted correctly, because everything is on the same line: there’s no indentation, not good. So, whilst this code would work, would upload it’s not nice to retool, so what you can do is, I see, void setup and you want to look to the curly brackets and please avoid setup, curly bracket there to start and a curly bracket. That finish so take everything inside of that select it all in tab. One you’ll shift it to the left, which is good now, if there’s no space between void, setup and popped in hit enter, give it a bit of space to make nice and easy to read. We’Ll do the same with void loopholes state there take all of this everything inside that an indent at once to the right now I’m going to take some spacing here, just to split up the different sections of what we’re doing so. This is our printing area. This is all of our sensory. Digital read digital write functionality. So what is this what’s? The code doing well, let’s, take a look, so our code is fairly straightforward: we’re only adding in a couple of new functions, couple new bits and pieces to use the serial functionality.

So we’ve got LED thing: we’ve got our button, pin type in our pin definition pin modes and the new bit here is serial dot begin a 9600 which you might like what’s that all about well serial is the built in serial library. You can get external software serial library, so you can use different pins, which uses a huge amount of overhead resources. But we’re going to be using that hardware for the unit only has one new out port on one set of TX and rx pins, so that’s. What we’re, using if it we have multiple serial ports, will be 301, 302, so on and so forth. The shear adopted year 9600 is the board rate, which is the number of bits per second, so that’s, quite slow, it’s. The slowest possible board rate then we’ve got a void loop. Now, what we’re doing is reading the buttons see other buttons values wearing the top value and we’re filtering it down using a separate local variable for filtered pipe value to divide it by force. We can see the raw value versus the filtered value and then we’re writing that to our led, so I’ve got all that functionality bundled into one now to output information to the serial monitor we use serial dot print. Now we can print the string and a string is a variable data type that uses characters, users that ASCII format and it actually sends a boy each of those characters through as ones and zeros, and then puts them back together to display the physical characters in the Serial monitor and so to use strings.

We use the double quotation marks so button. I’M. Writing. The physical taxi button is a space. Then we’ll write the value of the button state variable and then, when you can see that there’s no quotation marks s which we put there as a string. It would literally print out the words button States which isn’t what we want. We want the variable Darmstadt print. Then a print suspect and so on and so forth. It does that for the point value of the raw clock value and then the filter, clock value and finally, you can see print Ln in that sense, the print line. Now each of these lines are going to print out on the same horizontal line and then print Ln print. All of that out at the end sends a return character, so it knows to print everything after that, on a new line really cool. So let’s upload this to our board and see how we go all right. So now let’s take a look at the serial monitor so to open the serial monitor, go to the Tools menu of your arduino ide, ensure that you have the correct comport selected there to come forth is the right one. For me, it could be another number for you or a device for it if you’re on a mac and go to serial, monitor here, and it will connect to your board, take a few seconds and then we’ll print everything out. So you can see that we’re using no delays in this function, so it’s not waiting to anything so it’s printing it out very very quickly.

But you can see that when I push the button changes to zero and it’s printing everything on a new line. Other samples of button, though the pops currently zero, so let’s turn it up. We see we’ve got our we’ve got our raw value here, which you go to 1023. Yes, now filtered value, so you can see how that that scaling work.


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Originally posted 2015-12-01 17:33:01.

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Comment (8)

  1. i have been watching your workshop it is great i am having a problem when i try to manage my library or upload to my library it keep saying cc.arduino.contribuion.librery please can you help

  2. Ah Crap, I read that title as using Two Serial ports, since At Mega has two ports. can I shunt the data of one to print that out in the second Serial port and view that in the serial monitor?
    It be helpful to he able to see the incoming data, while using it…

  3. I realize you simply copied this code from an example and you are using it to show the serial monitor, but it looks like the LED is also supposed to light up according to the position of the wiper pin of the trim pot. I think that the PWM output to the LED should have been the variable filteredPotValue instead of potValue since this will can exceed the limits of the PWM value (needs to be divided by 4).


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