- Install
- Basic operation
- Basics of programming for electronic work
- Basics of programming for Excel
- Machine learning with scikit-learn
- Visualizing data with matplotlib
- Web programming
- RPA programming
- Miscellaneous programming
- Reference
Control LCD
You can control an LCD (character liquid crystal display) connected via I2C.
LCD-related blocks are in the "Display" - "LCD" group.
Connection
Connect the microcontroller and character LCD display via I2C.
If the microcontroller has fixed I2C SDA/SCL pins, use those fixed pins.
Also, use 5V power.
For example, when connecting to ESP32, connect as shown in the figure below.
Also, for microcontrollers where the I2C SDA/SCL pins are not fixed, specify the pin numbers to which the SDA/SCL are connected during initialization.
Initialization
For microcontrollers where the SDA/SCL pins are fixed, use the following initialization block.
Specify the number of characters/rows on the LCD and the I2C address.
Check the I2C address in advance using I2CScanner, etc.
Also, for microcontrollers where the SDA/SCL pins are not fixed, use the following initialization block to specify the pin numbers to which SDA/SCL are connected.
Clear the display
To clear the LCD display, use the "Clear display" block.
Displaying text
Before displaying text, specify the display position (cursor position) in the following block.
The top left corner of the screen is X=0/Y=0.
Next, use a block to display the text.
Example
A 16 character/2 line LCD displays "Hello" at X=0/Y=0, and "World" at X=2/Y=1.
The display and clearing are repeated every second.
This example can be downloaded from here.
