Display distance from Ultrasonic sensor as bargraph on LCD1602 LCD2004 using Arduino

hi welcome to Arduino tutorial from Robojax in  this video we are going to measure the distance   using ultrasonic sensor and displayed as a bar  graph on the LCD screen you can get the code   for this by clicking at the link below the  video in the description which will take you   to Robojax.com/learn/Arduino  let's get started with this there are many instances that you need to display  the distance measured using this ultrasonic sensor   as a bar graph the advantage of displaying of  the bar graph is that with repelling to number   bar graphs can easily be understood for example  right now the maximum is set at 20 centimeters   and immediately we know at the middle is half  without even reading this from further distance   you can read it and we can even go to 20 and  it will be full and the video I'm going to   explain how to get the bar graph have separate  video explaining how to use this display with   complete explanation the link will be provided  also another video that explains this ultrasonic   sensor I'm not going to do the detail of this  our concern is to just display the bar graph now let me explain the wiring I will show you the  wiring here but that's hard that we have four pins   SEL that is a clock is the SCL and SDA we have two  pins on Arduino here if CL and if me if you're not   doing it doesn't have it alternatively also you  can use analog for analog 5 analog for is SDA   and analog 5 is SEL you can connect it in here if  you're using other devices for example you know   Ethernet if the if a 4 a 5 is ECL Arduino mega  xx is D and 21 is ECL and northern do there have   been all mentioned I will provide you the link  for this as well then we have VCC blue have been   connected to 5 volts of Arduino and then G and D  or ground the green have been connected to ground   of Arduino for ultrasonic sensor we have VCC this  purple have been connected to pin 2 which have   been defined as additional 5 volts and then drag  and a coat reg is gray have been connected to pin   11 and eco is white have been connected to pin 12  of Arduino the last one is ground black have been   connected in here because we additional ground  available here I've spent quite some time writing   the code testing it and making sure it works and  providing you the code the least that you can do   for me please subscribe you don't lose anything  and it will be a great help and to be appreciated let me now explain the code the first thing  that you need to do is we need to download   two libraries while library is the liquid crystal  under school I to see that is the ITC module that   is here and behind us and they have to include  LCD bar graph Robo jacks which is the updated   version I've taken the original and I bloody from  this address from the playground and it was not   working with this so I have updated and worked and  changed many places and customize it with adding   some feature so it can work easily with this now  you have to download it I will provide you the   link this can be used without using the ultrasonic  or the graphs odessa's generally you need this for   this purpose so this library is needed but for  bar graph we are adding this on top of that so   if you have this do not worry and then just add  this in both cases the link will be provided so   you have to download it a zip file and save it  in your computer so you have two separate file   that you have to download a zip after that click  on sketch include library and then add dot set a   library when we click on that point it to area of  saved it says Robo Jack's USB related that this   is another example you just click to the zip that  you have download it and click open this way there   everybody will be added and do the same thing for  build once that is done then the examples will be   routed with this that I have written click  on file examples and then scroll down until   you see our Robo Jack's bar graph and then go to  Ultrasonic once you click this is a file that will   be opened now let me now explain it this wire  dot each is part of like Arduino IDE you don't   need to do anything if you just downloaded these  two and include it from hell you set the number   of characters this is 16 characters and to line  this to means number of lines and then we use a   class create an instance of it and we call it LCD  and then it has three parameters here the first   one is a I square C address for this tiny device  that is communicating instead of multiple lines   we are sending data here via serial communication  and the number of columns that we have and then I   will see the line number of lines we have to pass  these three to the class to find this address you   need to run I square feet scanner and I score C  scanner the link will be provided once you added   let me open eyes cursive scanner once that open  do not worry what is inside it the only thing   that you need to worry is to make sure that write  comport have been selected and uploaded now the   code will be uploaded to toward we know after that  click on the serial monitor and it will print the   address for you it says 0 X 3 F and then we use  this address let me upload the code back and then   we use that address and here after that we use the  LCD bar graph logo Jack's class and we created an   instance of it we call it our GX and when we pass  this LCD with the Sam person here and then number   of columns of the LCD and then that position  character 0 9 0 which is displayed in here I think loot tank new pang is for this device  for this ultrasonic sensor it is part of our duty   library you don't need to do anything it will just  work fine and then we define a trigger pin number   11 echo pin pal number 12 and maximum distance  after did succeed depending on your application   you have to put that so the calculation can be  done properly to display the maximum if you said   this sixty the sixty maximum will be here and the  thirty will be at the middle and so forth so make   sure to put the amount that you are using so you  can get the proper proportion graph and then you   paint sonar this is an instance of this class  and we are passing the trigger pin echo pin and   maximum distance for the class to work because  we are connecting these two just needs five   volts there's needs five volts and some Arduino  is you do not have five volts even though I had   here 5 volts extra 5 volts but I have to find  pin 2 as 5 volts so we can have 2 5 volts one   for this one for this one is connected directly to  5 volts and the other will be connected to pin 2   as extra VCC and here we have defined VCC to pin  number 2 and side the setup using pin mode VCC 2   we said this pin has output so this is outputting  the voltage acting as an output and using digital   right 2 and 2 as high this VCC 2 is equal to  2 so this is as fi type 2 when we said this as   high the pin this pin will always have 5 volts  but with letter current this is not suitable for   everything I've separate video explaining that  the link will be provided and this portion is   for LCD as he did not begin initialize with the  class for the LCD dot clear clears the value the   previous value in case if it exists and then LCD  print inside this double quotation reporter text   Robo jacks which will be displayed on the first  line and then we said zero-one we go to the line   one character zero to the next line and we print  bar graph now let me reset this so you can see   it reset it will be quick Robo jacks bar graph  so this is the text and then we give the user   for two seconds to see it after that we clear the  screen then you go inside the loop whatever code   we have inside the loop will run continuously  the first line with sonar dot Peng cm this will   get the a distance and centimeter and store it  in here so this is the value and we say equal   to this and we put a distance cm then we also  get the inch and we put a distance I and I’m   using centimeter in case if you are using inch  inside the code wherever we see this I replace   it with us and then here Robo jacks clear line  one we are clearing line 0 line 1 continuously   so it can read new value for us and we don't care  this one because a class is taking care of that   the graph class and then we set LCD cursor to  character 0 line 1 and we print this the word   distance with colon and then we set the cursor  at character 10 if we count death you will see   that 0 1 2 3 4 5 6 7 8 9 at 10 we are putting it  and we say distance cm it will print the distance   for a centimeter and then we go to character 14  this is 10 14 so 10 11 12 13 14 at 14 we print   cm again inside double quotation because it's  a text just doesn't have any quotation because   it is a variable that has value then we read  hundred millisecond and loop continuous like that and here is a demonstration at the moment it is  set to 20 centimetres and it perfectly shows the   distance as bar graph if I go further than a  20 centimeter because the ultrasonic sensor is   automatically disabled beyond that distance you  will get 0 that's a maximum distance that shows   20 if I make this for example 60 you will see that  that the whole span of this bar graph from here to   here will be 4 60 and for example 15 centimeter  will show somewhere in here so 4 of this have   been taken and then 8 is 30 and then 16 is 60 so  if I move this you will see that 30 is just there and if I point it to the laptop screen  well right now it shows around 60 now let's say you want to have the bar graph  instead of starting from here you want it to   start from the middle if a character age and if  you pay attention the LCD call number columns   so this is number of column because we wanted  to fill up this it was 16 now let's change it   to 8 character and then we want to start from 8  so this is a length this is a start and this is   a line 0 if you want to move it to the next one  changes to 1 so let's see inch for 20 centimeter so now this is 16 centimeter and  if I go 20 it will fill it up now I've inverted this larger faith it  will not work because the address for   this is not 3f so I have to change the  address the address is 0 X - 7 and then   also the number of characters  is 20 and number of line is 4 now the bar graph is being calculated  for 20 characters which is this would   with compare it to this the 16 is  here so we have four extra characters I change that to 30 the spreader bar graph this  is a death line at 9:40 is where you change the   location of the bar graph to be displayed  so zero zero means it goes the line zero   character zero and if I want to display the  bar graph and here it will be line 0 1 2 so   I will put 0 2 let me change this to that zero  just change this to two and upload the code and you will see that bar graph have been moved  to the next line in the same way you can change   those as well thank you for watching this was  how to display the distance using ultrasonic   sensor on the LCD screen I hope you have  learned something please don't forget to   thumb up the video if you have comment  a question posted I try to answer and   reply don't forget to subscribe and  leave the notification on thank you you

Channel: Robojax

Views: 52,247

Keywords: electronic, tutorial, training, video, robojax, arduino, code, download, lcd, bargraph, display, ultrasonic, hc-sr04, how to, class, LCD1602, LCD2004, I2C scanner

Id: V-o32As_Xv4

Length: 16min 2sec (962 seconds)

Published: Thu May 30 2019