Internet of Things (KOI v1.9.5)
The Wifi capabilities of KOI allows it to access IoT platforms.
Connecting to IoT Platforms
Loading Extensions
Search "KOI" in the search bar.
Or copy and paste the following link to the search bar.
https://github.com/KittenBot/pxt-koi
Blocks for IoT:
Sample Code
This tutorial just serves as a general example for communicating with MQTT servers, different MQTT servers may require different credentials.
ThingSpeak
Refer to this page for ThingSpeak tutorials: ThingSpeak Tutorial
MakerCloud
For MakerCloud Users, please refer to: MakerCloud Tutorial
Program Flow
1: Download the program to the Micro:bit.
2: Press A and B at the same time and wait for KOI to connect to the Wifi network.
3: Press A to upload a random number to the MQTT.
4: Press B to read the data from the MQTT.
5: KOI will display the number on its screen.
Sample Code
1. IoT(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.
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.
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