With Ignition subsystem, you can get informations about the the status of the ignition in the car and manage the behavior of Carberry due to ignition status changes.
Also, you can manage the behavior of the ingnition output wire. Please, read Hardware specifications section for more information about electrical wirings.

The commands available in IGNITION subsystem are:

Command Brief description
STATUS Retreives the status of ingnition line
EVENTS Manages the notification events
TIMERS Manages the shutdown timers
KEEPALIVE Prevents Raspberry Pi shutdown

Read more about Shutdown Procedure.