21st Century Learning and Teaching

LCD-Display Errors Solving WHO doesn't have that error already with LCD-Displays: Once uploaded (compiling) the code to the Arduino IDE there could be some errors happening, it happens to me… 

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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 less cabling (wiring)!

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Scrolling text with I2C-LCD1602. I was looking for a simple project for beginners, newbies on Coding and MakerED. A looong time ago since we did a project with ONLY four (4) wires, isn't it! Well here is one which is very easy to create, a "Scrolling text on a LCD1602 with "I2C-Bus".

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This tutorial demonstrates how to use our FC-113 IIC/I2C Serial Interface Adapter Module For 1602 LCD Display.  These serial interface modules simplifies connecting an Arduino to a 1602 Liquid Crystal display using only 4 wires.  This module uses the PCF8574T IC chip.

TIP for those WHO bought <===> https://www.amazon.de/dp/B079T1BW6T/  on #Amazon <==> from #AZDelivery: The #I2CAddress which I got delivered was "0x3F" and NOT "0x27, 0x38"!!; Check the I2C Address with this #Sketch <===> https://playground.arduino.cc/Main/I2cScanner  <===> SDA <==> PIN 4 / SCL <==> PIN 5 on Arduino

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Well, I made some searches on the internet and I found the right answer on a forum about this error, which says that one should scan the I2C Address of the device and replace the “lcd.init();” by “lcd.begin (0x3F,16,2);” whereby “0x3F” is the I2C Address of my LCD1602/I2C module. I scanned to find out the I2C Addess with this sketch, please check here:

https://playground.arduino.cc/Main/I2cScanner

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Text on I2C-LCD1602 Display written over Web-Page Sometimes it might be useful to write a text which should be displayed on a LCD display without any cabling, that is possible to do over your own Wi-Fi network and a NodeMCU ESP8266 module. And the project uses ONLY 4 wires as the LCD1602 gets…

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RFID RC522 Tag-Card Reader with LCD1602-I2C - We were already playing around with LCD's in our previous tutorial <===> First Steps with the Arduino-UNO R3 | Maker, MakerED, Coding | Super Starter Kit UNO R3 Project | LCD and Sensors Project <===> but there we used the SPI-Bus, meaning: connecting 12 wires (Potentiometer connections included...)!! With the I2C Bus we need ONLY to connect 4 wires!!

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https://www.scoop.it/t/21st-century-learning-and-teaching/?&tag=I2C

https://www.scoop.it/t/21st-century-learning-and-teaching/?&tag=LCD

http://blog.mklec.com/how-to-use-iici2c-serial-interface-module-for-1602-lcd-display/