The Concurrency Model

Introduction

To support its concurrency needs. pymata-express divides its workload into asyncio tasks.

According to Wikipedia, "concurrency is the ability of different parts or units of a program, algorithm, or problem to be executed out-of-order or in partial order, without affecting the final outcome. This allows for parallel execution of the concurrent units, which can significantly improve overall speed of the execution in multi-processor and multi-core systems."

Pymata-express consists of two main tasks:

Accept and process API calls from the application.
- Translate the API calls into Firmata formatted messages.
- Transmit these messages across the serial link.
Continuously receive data from the serial link while assuring no data loss.
- Decode the received data.
- Store information in the pymata-express internal data structures.
- Notify the application of data change notifications by calling the user-provided callback methods.

If you invoke the keep-alive feature, a third task continuously sends keep-alive messages to the Arduino.