SensorContext.swift

Purpose 

SensorContext.swift defines a simple container for managing the relationship between a MetaWear sensor device and its corresponding manager. This facilitates coordination between the sensor and control logic within the sensor fusion subsystem of the HealthyWear app.

Imports 

import Foundation
import MetaWear

Foundation: Required for class structures and memory management.
MetaWear: Core SDK used for BLE device representation and communication.

Class: SensorContext 

class SensorContext {
    weak var manager: SensorFusionManager?
    var device: MetaWear

    init(manager: SensorFusionManager, device: MetaWear) {
        self.manager = manager
        self.device = device
    }
}

Properties 

manager (SensorFusionManager?): A weak reference to the controller managing sensor fusion operations. The weak qualifier avoids retain cycles.
device (MetaWear): The BLE-connected wearable device instance.

Initializer 

The initializer binds the MetaWear device with the SensorFusionManager:

init(manager: SensorFusionManager, device: MetaWear)

Comments on the Commented Block 

// let handler: MetaWearHandler
// let hand: String

This appears to be a previously used or alternate design that stored additional metadata (hand) and used a broader MetaWearHandler instead of a specialized SensorFusionManager.

Usage 

SensorContext objects are expected to be used:

In sensor lifecycle tracking.
To associate multiple MetaWear devices with their managers.
During sensor fusion session setup or teardown.