EX: Temperature Sensors

Goals

Combine programming skills with OS/hardware knowledge.

• Learn how to interact with hardware on Linux

• Learn how to design and use software interfaces

Hardware

A number of different temperature sensors.

• DS18S20 (Onewire) (Datasheet)

• LM73 (I2C) <https://www.ti.com/product/LM73> (Datasheet)

Outcome

• A set of C++ classes implementing an ad-hoc Thermometer interface

  • DS18S20 via Onewire filesystem (here)

  • LM73 via userspace I2C (here)

  • Both DS18S20 and LM73 via the hwmon driver interface (here)

• Code to read a JSON sensor configuration file

  • Using an external library, possibly this one

  • See how hard that is with C/C++

• A program or two to

  • Read out sensors, and output reports of different sorts

  • Calculate averages

  • Possibly see how SQLite3 goes. I’d rather not do this but save the time for an easier Python experience.