What Eerie Leap is

A unit, the firmware it runs, and the app that sets it up: what each is, in the order you meet them.

The units

An Eerie Leap unit is a small computer in the car. It reads sensors wired to it and the messages on the car’s CAN bus, works values out of them, and does something with the result: logs it, shows it, or sends it on.

Units come in kinds. One kind reads and logs. Another has a display and shows a gauge. Connected together on a CAN bus, they find each other and work as one system.

The firmware

Every unit runs the same open-source firmware. It does not know what car it is in: it reads a configuration and does what that says.

Note

These docs are for using a unit. The firmware’s own reference, written for whoever changes it, stays with its code on GitHub.

The app

Gefera is the app that makes the configuration. On a desktop or a phone, you describe the inputs, the messages, the gauge’s screens and what to log, and write it to the unit over Bluetooth.

What a configuration is

Four things, each set up on its own page of the app:

• Sensors: every value the unit knows, whether it is measured, read from the bus or worked out.
• CAN bus: the messages the unit listens to and the ones it sends.
• Logging: which sensors are logged, how often, and what starts and stops it.
• Gauge: the screens, on a unit with a display.

Where to go next

How the parts fit follows one value from a sensor to a gauge, and Concepts defines the words the rest of the docs use. Configuring has a page for each part of a configuration, and Scripting the math expression engine and Lua.