Romuald,

welcome :-)

Am 27.04.23 um 15:06 schrieb Romuald Conty (Opus Codium):

To reach my goals, I'll have to:
 - Read two CAN buses to grab and display values on a HUD
 - Make an expansion board with some IC which requires to talk using I²C
 - Publish events on a third CAN bus which exposes additional sensors values

[...] To do it periodically, you would need a task

Is there is a code base to write a task in OVMSv3 context? or a similar code 
that have the right architecture in current firmware?

There is a `TaskBase` class, but that doesn't offer much of an advantage for your use case. Creating a task really is very simple with FreeRTOS.

Examples:

The `obd2ecu` component derives & publishes HUD data using a task and seems to be close to your use case.
The `retools_pidscan` component uses a task to scan for PIDs on OBD2/ISO-TP devices.
The `canopen` component uses worker tasks to handle async CANopen protocol communication.

Regards,
Michael

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