Pedal Guru

Pedal Guru (former OpenCC) is an open-source DIY project with the intention to bring useful resources that are appreciated by cyclists to easy-to-work platforms like Raspberry Pi and RP2040, in a more organized manner than usual apps offer us. The intention is to include integration with some popular services.

Note:

This project is under active develpment. The documentation is growing along the project as it's a work-in-progress. If interested, please check the development board and the reference diagram.

Hardware

This very first iteration of the project was based on the following devices:

• 1.28inch LCD Module, from WaveShare (using the GC9A01 overlay)

• Raspberry Pi Zero W, from Raspberry Pi Foundation

Now, we're including the following embedded device:

• RP2040-LCD-1.28, from WaveShare

Software

• The RP2040-LCD-1.28 doesn't need an additional OS, since it can run C and C++ code natively (aka "bare metal").

• In order to be able to use Raspberry Pi Zero W, we need an OS (operational system) to run our software on.

At this moment, we choose to use TinyCoreLinux, due the following reasons:

• It's "frugal" install, the system loads itself into RAM from storage and executes from there. This way, we have a fresh start on each boot and the system is not susceptible to data loss from improper shutdown (we can actually just unplug the battery with no harm);
• Straightforward: boots right to the prompt with the default user logged in with enought resources to load the interface, have internet access, use GPIO etc.;
• Startup time gets quite low, with just a few seconds.

To use the GC9A01 based display on TinyCoreLinux, we need to follow this procedure.

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^{@juliannojungle, 2022}