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Tag Archives: LCD2004

Social Distancing Monitor with Alarm, Arduino NANO and I2C LCD2004 Display | Maker, MakerED, Maker Spaces, Coding

Social Distancing Monitor with Alarm, Arduino NANO and I2C LCD2004 Display | Maker, MakerED, Maker Spaces, Coding

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Social Distancing Monitor with Alarm, Arduino NANO and I2C LCD2004 Display

In previous tutorial we were using an LCD1602 display, this time we will use an LCD2004 display which gives us the opportunity to display on four (4) lines. That enables us to display more accurate text.

The wiring is exactly the same as already mentioned in previous tutorial, there is ONLY to make a few changes in the code, please check:

The complete Code fr an LCD1602 display could get downloaded in “.doc” format below.

Download and open the document, copy it and bring it in a NEW Sketch of the Arduino IDE. Upload it to the Arduino Nano and have fun with it!

SO, once uploaded we will need to change some code to make it work for an LCD2004 display, we will see how below.

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Click image, please, to enlarge.

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Click image, please, to enlarge.

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Well, as you can see there isn’t a lot of changes, easy!! A 5 minutes project 😉 Once you have changed the mentioned lines, upload the code again.

And IF you want to START straight on, here below is the code in .doc format:

 

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Stay tuned for next blog post(s) 😉

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GUST-AVRIL2014-800px-2L’auteur Gust MEES est Formateur andragogique / pédagogique TIC, membre du “Comité Conseil” de “Luxembourg Safer Internet” (LuSI), appelé maintenant BEESECURE, partenaire officiel (consultant) du Ministère de l’éducation au Luxembourg du projet  ”MySecureIT“, partenaire officiel du Ministère du Commerce au Luxembourg du projet ”CASES” (Cyberworld Awareness and Security Enhancement Structure). L’auteur était aussi gagnant d’un concours en électronique en 1979 ( Pays germaniques ) et voyait son projet publié dans le magazine électronique “ELO”.


The author Gust MEES is ICT Course Instructor, ”Member of the Advisory Board” from “Luxembourg Safer Internet” (LuSI), BEESECURE, Official Partner (Consultant) from the Ministry of Education in Luxembourg, project “MySecureIT“, Official Partner from the Ministry of Commerce in Luxembourg, project “CASES” (Cyberworld Awareness and Security Enhancement Structure).

The author was also a winner of an electronics contest (Germanic countries) in 1979 and got his project published in the “Electronics Magazine ELO”.

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First steps with the Arduino UNO, NANO | Displaying Time, Date, Temperature and Humidity on a LCD2004 Display | Maker, MakerED, Maker Spaces, Coding

First steps with the Arduino UNO, NANO | Displaying Time, Date, Temperature and Humidity on a LCD2004 Display | Maker, MakerED, Maker Spaces, Coding

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Displaying Time, Date, Temperature and Humidity on a LCD2004 Display

We were already playing around with a LCD2004 display in a previous tutorial where we displayed the temperature and the humidity <===> First Steps with the Arduino-UNO R3 and NANO | Maker, MakerED, Coding | I2C LCD Temp./Humidity displaying, now we will add as well Time and Date with a DS3231 module.

We will use the tutorial from <===> Arduino datalogger with SD card, DS3231 and DHT22 sensor, where we will NOT use the datalogger for our project to make it as easy as possible; courageous ones, once the project is working for them, may add the datalogger 😉 In that tutorial you will find also the code…

Please check video tutorial below:

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Check also the blog below, please:

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Check the schematic above please to know how to wire it; first we will do it on a breadboard and later we could solder it… Do the wiring as shown, without the Datalogger-SDCard-Module. See PIC below, please.

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In the above image you will see an DHT11 Sensor (blue case) as at the time I didn’t have it yet (was ordered…) a DHT22 Sensor (white case) as shown on the finished project. As the project works we can now solder everything together on a strip-board, choosing a case; I used a cardboard box with the dimensions of 140 mm X 130 mm X 60 mmm, fixing the LCD2004 and the DHT22-Sensor on the front of the cardboard box.

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Components soldered on a Stripboard

Components soldered on a Stripboard

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Soldering cables on the DHT22 sensor and isolating pins with heatshrink tube

Soldering cables on the DHT22 sensor and isolating pins with heatshrink tube

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Soldering cables on the I2C adapter of the LCD2004 and isolating pins with heatshrink tube

Soldering cables on the I2C adapter of the LCD2004 and isolating pins with heatshrink tube

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Fixing the LCD2004 display on the frontpanel and the distance bolts

Fixing the LCD2004 display on the frontpanel and the distance bolts

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Final assembling of the parts

Final assembling of the parts

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The finished project

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As you can see in above image, I added some text with a Dymo tape, looks better 😉

 


The Sketch (Code) for the project

One thing missing, the sketch (code). Please find it below and open it , copy it and paste it to the Arduino IDE:

Read the comments in the sketch to understand the changes which I made to the original, it’s actual easy…

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Prices and where to order

 

RTC DS3231

 

Click image, please, to enlarge.

Arduino NANO

ARDUINO NANO

Click image, please, to enlarge.

 

LCD2004-I2C

Click image, please, to enlarge.

 

 Temperature/Humidity SensorsDHT11

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L’auteur Gust MEES est Formateur andragogique / pédagogique TIC, membre du “Comité Conseil” de “Luxembourg Safer Internet” (LuSI), appelé maintenant BEESECURE, partenaire officiel (consultant) du Ministère de l’éducation au Luxembourg du projet  ”MySecureIT“, partenaire officiel du Ministère du Commerce au Luxembourg du projet ”CASES” (Cyberworld Awareness and Security Enhancement Structure)..


The author Gust MEES is ICT Course Instructor, ”Member of the Advisory Board” from “Luxembourg Safer Internet” (LuSI), BEESECURE, Official Partner (Consultant) from the Ministry of Education in Luxembourg, project “MySecureIT“, Official Partner from the Ministry of Commerce in Luxembourg, project “CASES” (Cyberworld Awareness and Security Enhancement Structure).

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Stay tuned for next blog post(s) 😉

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First Steps with the Arduino-UNO R3 and NANO | Maker, MakerED, Coding | I2C LCD Temp./Humidity displaying

First Steps with the Arduino-UNO R3 and NANO | Maker, MakerED, Coding | I2C LCD Temp./Humidity displaying

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LCD1602 and LCD2004

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Displaying Temperature/Humidity on a I2C LCD 

We were already playing around, as seen on my tutorials below, with the Temperature/Humidity sensors DHT11, DHT22 and LCD1602, without I2C possibility. There were a lot of cables to connect, we will try out this time to use a LCD with I2C bus connection as it uses ONLY 4 wires to connect. It’s a perfect project for newbies in coding as they will see the measured values directly on the LCD screen, the success and happy factor is guaranteed!

Related tutorials:

 

Let us have first a look on the wiring (cabling) which is actually very easy, have a look below please:

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Fritzing-Wiring

====> Click image, please, to enlarge.

The wiring (cabling) will take about +/- 5-10 minutes depending on your own rhythm… Let us have a look on the coding now: we will use exactly the same code (Sketch) as in our first tutorial here, which we will change just a bit to fit for I2C LCD1602 display:

Copy&Paste the code from above tutorial where it is marked “I also made an example where I display the results on a LCD. Here’s the source code of that example:” and paste it into the Arduino IDE. Connect the Arduino NANO with your computer now. Open the Arduino IDE and choose the board “Arduino NANO”, see screenshot below, please:

Arduino-IDE-Board Manager-1

Click image, please, to enlarge.

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Next step, on the same Arduino IDE select the Processor:

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Arduino-IDE-Board Manager-OLD-NEW-BOOTLOADER

Click image, please, to enlarge.

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TIP: when the LED on the Arduino NANO is lightning GREEN it is an original NANO and you must choose “Atmega328P”; if the LED is lightning RED, it is a clone and you must choose “Atmega328P (Old Bootloader)”.

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NOW it is about time to adapt the code (Sketch) to an I2C-LCD1602 display, let us have a look on the Sketch (the original):

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OLD Code to change

Click image, please, to enlarge.

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As we can see in line 10: the library is meant for a normal LCD display, it needs to get changed for a “I2C LCD Library”.

In line 15: the same it shows the wiring pins for a normal LCD display, it needs to get changed for a “I2C LCD” display.

In line19: It is BETTER to add as well the I2C-Address, mostly “0x27” OR “0x3F”.

That is NOT much to change, we will see in the screenshot below the How-To:

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NEW Code to change

Click image please, to enlarge.

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By enlarging (click on the image) you will see by comparing where the changes are. I commented in the lines the WHY… Try it out to change it yourselves or just download the Sketch (Code) here below who is working:

Copy&Paste this code into a NEW Sketch on the Arduino IDE and upload now the code to the Arduino NANO (or Arduino UNO) and enjoy it! 😉 Here below a photo of the working sketch:

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DHT11 on LCD I2C Display

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And in case of that you have a I2C LCD with 20×4 configuration it works also, check photo below please:

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I2C LCD2004 and DHT11

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As you can see the two first lines from 4 possible lines are only used, that is normal as the Sketch (Code) is actually written for a 2 line LCD. BUT we can add some lines of code in the original Sketch to make it working on 4 lines, which is very easy actually, check below please for explication:

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Printing text on the LCD

Click image, please, to enlarge.

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As you can see in line 30 in above screenshot of the code ===> “lcd.setCursor(0,0); // Sets the location at which subsequent text written to the LCD will be displayed” the the line is set to “0” which means the first line on the LCD1602. By changing the value to “lcd.setCursor(0,1)” in line 30 and in line 34 to “”lcd.setCursor(0,2)” the text will be displayed as follows, see photo below please:

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I2C LCD2004 DHT11

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NOW, as you can see, we have two lines without any text where we could bring in some text. Let us try to find out HOW! We have seen already that “lcd.setCursor(0,0) above. We used in above example the lines 2 and 3 from 4 lines which were displayed as shown in above photo, right?

 

Printing text on the LCD in 4 lines

Click image, please, to enlarge.

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Check lines 26 and 27 and also lines 37 and 38: I added them, do the same and the text between the “………” you may change it with your OWN text what will result in following, check photo below, please:

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I2C LCD2004 4 lines of text

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BUT wait, my text looks centralized and yours NOT, HOW?! Check photo below, please which explains:

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4 Lines centered on I2C LCD

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Prices and where to order

 

LCD1602 + I2C Modul

LCD1602-I2C

Click image, please, to enlarge.

Arduino NANO

ARDUINO NANO

Click image, please, to enlarge.

 

LCD2004-I2C

Click image, please, to enlarge.

 

 Temperature/Humidity Sensors

DHT11

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Stay tuned for next blog post(s) 😉

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GUST-AVRIL2014-800px-2L’auteur Gust MEES est Formateur andragogique / pédagogique TIC, membre du “Comité Conseil” de “Luxembourg Safer Internet” (LuSI), appelé maintenant BEESECURE, partenaire officiel (consultant) du Ministère de l’éducation au Luxembourg du projet  ”MySecureIT“, partenaire officiel du Ministère du Commerce au Luxembourg du projet ”CASES” (Cyberworld Awareness and Security Enhancement Structure). L’auteur était aussi gagnant d’un concours en électronique en 1979 ( Pays germaniques ) et voyait son projet publié dans le magazine électronique “ELO”.


The author Gust MEES is ICT Course Instructor, ”Member of the Advisory Board” from “Luxembourg Safer Internet” (LuSI), BEESECURE, Official Partner (Consultant) from the Ministry of Education in Luxembourg, project “MySecureIT“, Official Partner from the Ministry of Commerce in Luxembourg, project “CASES” (Cyberworld Awareness and Security Enhancement Structure).

The author was also a winner of an electronics contest (Germanic countries) in 1979 and got his project published in the “Electronics Magazine ELO”.

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Keywords necessary for me to create this blog post: Arduino UNO R3, Arduino NANO, UNO R3 Project, LCD 1602, Sensors, DHT11,  DHT22, Temperature/Humidity Sensor, coding, learning to learn, learning by doing, trouble shooting, hygrometer, I2C, LCD 20×4,

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