Requesting Access to an I/O Device on the Host

1. Edit the application's manifest.json file.
2. Add one instance of the devices key for each device you want to map to the application. The devices listed must be present in the /opt/edge-agent/device-mapping.json file.
3. For each device specify the:
   • id: This identifier must match the one specified for the device in the /opt/edge-agent/device-mapping.json file.
   • service: The application service into which the device will be mounted.
   • file: The name of the device file in the service's container. The application will use this file to access the device (using functions such as open, close, ioctl, etc.).
   • type: The device type. As of Predix Edge 2.3.0, SERIAL is the only supported device type.
   • description: A user-defined descriptor for the device.

Sample application manifest:

{
  "manifest": {
    "name": "serial-port-readout",
    "capabilities": [
      {
        "name": "serial-port-readout",
        "version": "1.0.0",
        "handler": "unused"
      }
    ],
    "devices": [
      {
        "id": "device3",
        "service": "main",
        "file": "/dev/ttyApp",
        "type": "SERIAL",
        "description": "Input From Infinite Improbability Drive"
      }
    ]
  }
}