Clearing the terminal screen

Question

I m reading data from 9 different sensors for my robot and I need to display them all steadily  in the same window so I can compare the values and see if any of the readings is off   The problem I m having with both Serial print and lcd print is that the values are constantly moving and I can t really have a good look at them while moving the robot   I was thinking to call something like Serial clear   before displaying anything else and that would just keep things steady and in one place  changing only the values   From what I found so far  Serial print 17 BYTE  for instance is no longer supported  Calling the ESC key    So   for those with a bit more Arduino experience   what is the proper way to do this

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If one of you guys are using virtual terminal in proteus and want to clear it just add Serial write 0x0C   and it gonna work fine

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You could just do   Serial println   n n n n n n n n n n n n n n n n n n n n      or if you want   for  int i 0  i lt 100  i         Serial print   n

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the best way I can think of is using processing there are a few introductions on the net like displaying serial data  arduino graph and arduino radar Since Arduino is based on processing its not that hard to learn

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I have found that ASCII 12 make a Form feed  that is a new page  here is a wikipedia definition      Form feed is a page-breaking ASCII control character  It forces the   printer to eject the current page and to continue printing at the top   of another    The code is  Serial write 12     Arduino Terminate doesn t support the character but Putty a light open source telnet client can do it  An Example of the code   void setup       Serial begin 9600    Initializase the serial transmiter speed     void loop           Code tested with Putty terminal      Serial write 12    ASCII for a Form feed     Serial println  This is the title of a new page      your code      delay 500    delay for visual

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You could try   Serial write 13     Which will provide a carriage return  returning to the start of the line every iteration - which should do what you re chasing   Especially if everything is fixed width

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As close as I can get to Clear Screen       void setup        put your setup code here  to run once  Serial begin 115200       void loop      Serial println  This is Line ZERO         put your main code here  to run repeatedly   for  int i   1  i  lt  37  i           Check and print Line   if  i    15         Serial println  Line 15           else    Serial println i      Prints line numbers   Delete i for blank line        delay 5000

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ESC is the character  2 7  not  1 7  You can also try decimal 12  aka  FF  form feed    Note that all these special characters are not handled by the Arduino but by the program on the receiving side  So a standard Unix terminal   xterm  gnome-terminal  kterm       handles a different set of control sequences then say a Windows terminal program like HTerm    Therefore you should specify what program you are using exactly for display  After that it is possible to tell you what control characters and control sequences are usable

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I made this simple function to achieve this   void clearscreen          for int i 0  i lt 10  i              Serial println   n n n n n n n n n n n n n n              It works well for me in the default terminal

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There is no way to clear the screen but  a really easy way to fake it can be printing as much Serial println    as you need to keep all the old data out of the screen

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imprime en linea los datos con un espaciado determinado  as   tendr  s columnas de datos de la misma variable y ser   m  s claro  Print all data in line  so you have rows  with the data you need  i just solve the same problem like this  just make sur you had asignad a constant data size and spacement between  I made this  Serial print  cuenta q2      Serial print  cuenta pulsos encoder 1 3   Serial print   t    Serial print q2 real 4   Serial print   t    Serial print  cuenta q3      Serial print  cuenta pulsos encoder 2 3   Serial print   t    Serial print q3 real 4   Serial print   t    Serial print  cuenta q4      Serial print  cuenta pulsos encoder 3 3   Serial print   t    Serial println q4 real 4

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The Arduino serial monitor isn t a regular terminal so its not possible to clear the  screen using standard terminal commands  I suggest using an actual terminal emulator  like Putty   The command for clearing a terminal screen is ESC 2J  To accomplish in Arduino code     Serial write 27            ESC command   Serial print   2J          clear screen command   Serial write 27     Serial print   H           cursor to home command   Source  http   www instructables com id A-Wirelessly-Controlled-Arduino-Powered-Message-B step6 Useful-Code-Explained-Clearing-a-Serial-Terminal

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Another kick at the can   void setup          123456789 123456789 123456789 123456789 123     String newRow   n                                              String scrSiz   n  n  n  n  n  n  n  n  n  t     Serial begin 115200               this baudrate should not have flicker but it does as seen when           the persistence of vision threshold is insufficiently exceeded           115200 baud should display  10000 cps or a char every 0 1 msec           each  for  loop iteration  should  print 65 chars  in  lt  7 msec           Serial print   artifact inefficiencies are the flicker culprit           unfortunately   r  does not render in the IDE s Serial Monitor    Serial print  scrSiz   n       size screen vertically to fit              for int i 0 i lt 30 i          delay 1000         Serial print  String scrSiz  i    t     10 i   newRow      void loop

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If you change baudrate for example back and forth it clears the Serial Monitor window in version 1 5 3 of Arduino IDE for Intel Galileo development

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It s not possible to clear the Serial Monitor window based on incoming serial data   I can think of a couple of options  the simplest  and cheatiest  is to use println   with a fixed width string that you ve generated that contains your sensor data     The Arduino IDE s Serial Monitor s Autoscroll checkbox means if you persistently send the fixed width string  with 500ms delay perhaps  this will give the impression that it s updating once it gets to the bottom and starts scrolling   You could also shrink the height of the window to make it look like it only has one line   To accomplish a fixed width string that s suitable for serial println   you ll need functions to convert your sensor values to strings  as well as pad trim them to a persistent size  Then concatenate the values together  including separators if it makes the data easier to read   An output of something similar to this is what i m hinting at      1 0   1 1   1 2   1 3   1 4   1 5   1 6   1 7   1 8     All things considered  this isn t a great solution but it would get you a result   A far smarter idea is to build another program outside of Arduino and it s IDE that listens to the com port for sensor values sent from the Arduino   Your Arduino program will need to send a message your external program can unambiguously interpret  something like 1 0 5  where 1   sensor ID and 0 5   sensor value    The external program would then keep these values  1 for each sensor    The external program can then display this information in whatever way you d like  a nice console output would be relatively easy to achieve  -   C  has  NET s serialport class which is a pleasure to use   most of the time    Python has a module called pyserial  which is also easy great   Either language will give you much greater control over console output  should you choose to proceed this way

[terminal] Clearing the terminal screen?

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