# Voice Recognition (Firmware v1.9.5 or above)

KOI is able to recognize our commands after training.

### Recognizing Voice Commands

<figure><img src="https://kittenbothk-eng.readthedocs.io/en/latest/_images/mcbanner.png" alt=""><figcaption></figcaption></figure>

#### **Loading Extensions**

Search "KOI" in the search bar.

<figure><img src="https://kittenbothk.readthedocs.io/en/latest/_images/koi_search.png" alt=""><figcaption></figcaption></figure>

Or copy and paste the following link to the search bar.

**<https://github.com/KittenBot/pxt-koi>**

Blocks for voice recognition:

<figure><img src="https://kittenbothk-eng.readthedocs.io/en/latest/_images/11.png" alt=""><figcaption></figcaption></figure>

#### Sample Program

{% embed url="<https://makecode.microbit.org/_YbF1E8fUo4u7>" %}

### Program Flow

1: Download the program to the Micro:bit.

2: Press A and record the first command. A green color will be shown if the command has been successfully added. Otherwise red will be shown.

3: Press B to continue, you can now repeak step 2 and record the next command.

4: Repeat step 2-3 to record all your commands.

```
    AI Camera KOI has the capacity for 10 voice samples.
```

5: Press A and B at the same time to recognize a command. A green color will be shown if KOI successfully recognizes your command, else it will show a red color. The command ID will be shown on Micro:bit.

### Sample Codes

[1. Voice Recognition(Firmware1.9.5\_Extension0.5.7)](https://makecode.microbit.org/_aqCH640XxJu5)

### Voice Recognition Demo Video

{% embed url="<https://www.youtube.com/watch?feature=youtu.be&v=xlcv4hETpRI>" %}

### 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](https://kittenbothk-eng.readthedocs.io/en/latest/Makecode/makecode_extensionUpdate.html)

### FAQ

#### 1: There is no reaction after pressing the buttons on the Micro:bit.

· 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.)

#### 2: Does KOI work with 3V input?

· A: No, KOI only works with 5V.

#### 3: KOI displays red everytime I try to record my command.

· A: The noise level hasn’t been calibrated, it is essential to run the block before voice recognition.


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