From KOI v1.12.0 onwards, saving and loading a voice recognition model is supported.
The trained model will be stored on an SD card, without an SD card we won't be able to save this model.
Load KOI Extension: https://github.com/KittenBot/pxt-koi
Blocks for Voice Recognition:
1: Download the program to the Micro:bit.
2: Press A to load the trained model.
3: Press B to recognize a voice command. KOI will display green upon a successful recognition.
4: Micro:bit will display the tag of the recognized command.
1. Voice Recognition Model Loading(Firmware1.9.5_Extension0.5.7)
There may be updates to extensions periodically, please refer to the following link to update/downgrade your extension.
· A: 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.)
· A: No, KOI only works with 5V.
· A: The noise level hasn't been calibrated, it is essential to run the block before voice recognition.