KOI - Taking and Displaying Pictures
KOI can take pictures and display them like a digital camera.
Install an SD Card
The pictures are stored onto an SD card, without an SD card, these operations would fail.
Load KOI Extension: https://github.com/KittenBot/pxt-koi
Blocks for taking pictures and displaying:
Download the program to MicroL:bit.
Press button A on the Micro:bit to take a picture.
Press button B on the Micro:bit to display the picture.
The above program can only save 1 picture because the file is overwritten when a picture is saved. By making use of numbers, we can create a camera program that stores many photos and show them all.
Extension Version and Updates
There may be updates to extensions periodically, please refer to the following link to update/downgrade your extension.
Makecode Extension Update
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: The picture appears noisy and there are black bars when I view the pictures on my computer.
A3: This is because KOI’s camera is not a phone camera, the quality and resolution is not as good. The black bars are caused by the difference in aspect ratio, since our computer monitors are typically 16:9 and KOI is 1:1, black bars would appear.
If you have any question, please feel free to contact us at Discord, we will always be there to help.