Text-to-Speech (KOI v1.9.5)

By using BaiduAI, KOI can realize Text-to-Speech.

Using Text to Speech


Load KOI Extension: https://github.com/KittenBot/pxt-koi

Loading Extensions

Blocks for Text to Speech:


Sample Program:

Wifi connection is required to use text to speech function.


Program Flow

1: Download the program to the Micro:bit.

2: Press A and KOI will say “Hello” in English.

3: Press B and KOI will say “Good Morning” and “I am happy” in English.

The text to speech function only supports short phrases(2-3 words) and there must be no spaces between the words.

4: Press A and B and KOI will say “123” in Putonghua.

MakeCode does not support Chinese chracters but BaiduAI does, so BaiduAI will treat numbers as Chinese.

Sample Code

1. Text to Speech(Firmware1.12.0_Extension0.5.7)

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


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.