mb2-thermometer: display current (chip) temperatures

Bart Massey 2023

This code prints the current temperature of chips on the MicroBit v2 in °F or °C once per second and it also shows a rough temperature value using the 5 x 5 LED display. The user can press either button on the MicroBit v2 to change the measurement setting. The LSM303AGR temperature unit and the CPU temperature unit are supported.

• The main branch uses the lsm303agr crate for the LSM303AGR.

• The twim branch does raw i2c for the LSM303AGR to demonstrate that process.

Build and Run

Compile and run with cargo embed --release. To compile and run in debug mode, type cargo embed.

What was changed

Please see this pull request for additional details.

How it went

Lee Hoang: It went pretty well. I consider the changes made to this project to be a good exercise in reading source code, looking up documentation, and applying comments where appropriate.

Acknowledgements

Thanks to the authors of the lsm303agr crate. It is a really nice interface to that device.

While this code was written without reference to the examples of accelerometer and magnetometer use in the Rust Embedded Discovery Book for the Microbit v2, those examples were definitely the inspiration for writing the initial version of this.

Another acknowledgement to Claude Code for suggesting code improvements that cargo clippy missed.

License

This work is licensed under the "MIT License". Please see the file LICENSE.txt in this distribution for license terms.