KOI - Display Text
English strings can be displayed on the KOI screen.
Load KOI Extension: https://github.com/KittenBot/pxt-koi
Blocks for displaying text:
We can add a delay to specify the duration shown.
The coordinates refer to the top left corner of the text. See figure below for explaination of coordinates.
Download the program to Micro:bit.
Pressing button A on the Micro:bit to display “Kittenbot” on the screen. Pressing button B to display “KOI” for 2 seconds.
Extension Version and Updates
There may be updates to extensions periodically, please refer to the following link to update/downgrade your extension.
Q1: There is no reaction after pressing the buttons on the Micro:bit.
A1: This is because KOI has a longer boot time than Micro:bit. When the power is turned on, Micro:bit has already ran the code for KOI initialization before KOI is ready.
Solution: Reset your Micro:bit after KOI has been turned on. (The trick is to let KOI power on completely before initialization.)
Q2: Does KOI work with 3V input?
A2: No, KOI only works with 5V.
Q3: Why does the text disappear after a short while?
A3: Since the dislay of the KOI keeps refreshing, the text cannot persist on the screen for a long time. For displaying persisting text, considering connecting an I2C OLED screen.
If you have any question, please feel free to contact us at Discord, we will always be there to help.