DIY Data Science: A Complete Guide to Data Logging with the Micro:bit V1

Whether you are a STEM teacher looking for a classroom lab solution, a parent seeking a weekend project, or a maker building an environmental monitor, the Micro:bit V1 is a hidden gem for data logging.

While the newer V2 has built-in logging memory, the V1 is incredibly capable when paired with a computer. By using the Serial (USB) Connection and Radio Communication, you can turn these pocket-sized boards into useful sensors.

The Equipment List

To get started, you will need:

For Local Logging:
- 1x Micro:bit V1.
- 1x Micro-USB cable (high quality, data-capable).
- A computer with a Chrome-based browser (to use the WebUSB feature in MakeCode).
For Remote Logging:
- 2x Micro:bit V1s.
- 1x Battery pack (2xAAA) for the "Remote" Micro:bit.
- 1x Micro-USB cable for the "Receiver" Micro:bit.
Optional (For Experiments):
- A strong magnet (to test the Compass/Magnetometer (see later in this post).
- A flashlight (to test Light Level).
- An ice pack or hair dryer (to test the Temperature sensor).

Method 1: The "Direct Link" (Local Logging)

The simplest way to log data is to keep your Micro:bit tethered to your computer. The Micro:bit senses the environment and "talks" back to the computer through the USB cable using Serial Communication.

The Setup:

Code it: In MakeCode, go to Advanced > Serial. Use the serial write value "label" = [sensor] block.
Flash it: Connect your Micro:bit via USB and download the code.
View it: A purple "Show Data Device" button will appear under the simulator. Click it to see a live scrolling graph of your data!
Save it: Use the "Export" button in the top right to download your data as a CSV file, which can be opened in Excel or Google Sheets for analysis.

Method 2: The "Messenger" (Remote Logging)

What if you want to measure something 20 feet away from your laptop? We can use two Micro:bits: a Sender and a Receiver.

1. The Sender (The Remote "Probe")

This Micro:bit is powered by a battery pack and placed wherever the "action" is.

The Logic: It reads a sensor and broadcasts it over the radio.
Key Blocks: radio set group [number] and radio send value "name" = [value].

2. The Receiver (The Data Bridge)

This Micro:bit stays plugged into your computer via USB. It acts as a translator, listening for radio signals and passing them to the PC.

The Logic: "When I hear a radio message, write that value to the Serial (USB) port."
Key Blocks: on radio received name value → serial write value [name] = [value].

Project Spotlight: Detecting and Logging Magnetism

One of the most exciting uses for this setup is exploring invisible forces. By using the built-in magnetometer (compass sensor), you can track the strength of magnetic fields as a magnet moves closer or further away.

For a specific step-by-step on setting up this experiment, check out our deep dive: Detecting and Logging Magnetism with the Micro:bit V1.

Teacher & Parent Pro-Tip: The "CSV" Advantage

The real magic happens when students export their data. Instead of just looking at a screen, they can:

Calculate the Average, Min, and Max in Excel.
Create charts for a science event or just for interest.

Conclusion

The Micro:bit V1 may be the "older" model, but for data logging, it remains a powerhouse. By teaching kids how to move data from a sensor to a radio, then to a cable, and finally into a spreadsheet, you are teaching them the fundamentals of the Internet of Things (IoT) and data capture.

For more detailed technical steps and code snippets, visit the original guides:

All opinions in this blog are the Author's and should not in any way be seen as reflecting the views of any organisation the Author has any association with. Twitter @scottturneruon