Click to save the above settings, then you will see a page like this. Click API Keys.  

In this page, you can see Write API Key, which is very important in the latter steps. Note: Different projects will generate different Write API Key.  

Material List

• BBC micro:bit
• ESP8266 serial wifi module
• ELECFREAKS octopus:bit
• IIC OLED module
• micro:bit power module

Operation Procedure

Step 1

  Connect ESP8266 module to Octopus:bit. Connect RX on the ESP8266 module to P0, then TX to P1. Because ESP8266 module requires 3.3V power supply, we have to “VCC+ GND” on the ESP8266 module to “VCC + GND” under the yellow pins on Octopus:bit ???Plug the OLED module to IIC connector in the bottom left corner of Octopus:bit. Then plug in micro:bit to Octopus:bit. After connection completed, you will see the following picture showed.  

Step 2

  Click to open makecode.microbit.org. Search in Add Package for ESP8266, and then add this package.  

Step 3

After we have added IOT Package, we can see 3 extra block drawers. In this case, we will only use ESP8266_IoT and OLED.  

Step 4

Initialize OLED screen in the on start block, and set RX and TX on ESP8266 wifi module to be PO and P1 separately.

Step 5

Add the following blocks into forever???connect wifi : Connect ESP8266 with your wifi by filling in your wifi SSID and KEY. connect thingspeak: Connect ESP8266 to Thingspeak IOT platform. set to be send data: Set the data to be sent. Please fill in your Write API Key under your Thingspeak account to Write API Key . You can fill 8 groups of any data into field1~8. In the previous Channel setting, we have just activated field 1. So here, we place temperature block to field 1. send data to thingspeak can send data to IoT platform.  

Step 6

  When the data received in the serial port, display the data on the OLED screen. Then we can monitor the program operation through OLED screen.  

Step 7

  Program download. You can visit the whole program though the link here: https://makecode.microbit.org/_FMhKfveLtTLz Or you can visit the page below to Downloadthe program of this case directly.

Step 8

 A very important step is to change power module. Because if you power through the USB connector on the micro:bit, the drive performance will be very weak, which might lead to the instability of ESP8266. The input of this power module can connect with DC power supply or USB, and its output can connect the battery terminal of micro:bit directly.  

Step 9

Use OLED to monitor the program operation.  

Result

  Now, it’s time to see a wonder. Return back to your Thingspeak page, click Private View, then you can see the data you sent from micro:bit to the IOT platform. And the data keeps updating for every minute！Micro:bit has ipload the data to the Internet! Now you can access these data with your computer, mobile or tablet!  

In the last

  From the above loaded package, we can see that our environment IoT kit is coming out soon. Environment IoT Kit can detect all kinds of environment data like temperature, humidity, wind speed, light intensity, noise, dust, PM2.5 and so on. Besides, you can upload these environment data to thingspeak IoT server through ESP8266 serial wifi module. Just waiting! I would like to thank Mr. Zach, CEO of Micro:bit Educational Foundation, for his acknowledgement of our kit.  

I want to thank Mr. Waris from micro:bit foundation too! Through several deep communication in mulitple days and nights, we have introduced this kit to the public. You have provided lots of ideas and inspirations for me. Thank you very much! Also, I want to thank our TinkerCademy parterners. Thank you for giving us so much technique support! Besides, I want to thank my wife for her support. You are the most powerful backbone in my family! Thank you!