{
  "_note": "The same capture from before the gateway was taught to omit empty fields, kept deliberately: it is what a serde-derived producer emits by default, and the validator must keep accepting it. Note p1p's \"job_name\": null - an idle printer with no job - which used to fail validation and take the whole telemetry batch down with it.",
  "frames": [
    {
      "type": "hello",
      "gateway_id": "dev-gw",
      "farm_id": "dev-farm",
      "token": "dev-token"
    },
    {
      "type": "heartbeat",
      "seq": 2
    },
    {
      "type": "telemetry",
      "printers": [
        {
          "printer_id": "p1p",
          "name": "P1P",
          "state": "IDLE",
          "percent": 0,
          "layer": 0,
          "total_layers": 0,
          "remaining_minutes": 0,
          "job_name": null,
          "nozzle_temp": 23.40625,
          "nozzle_target": 0.0,
          "bed_temp": 22.4375,
          "bed_target": 0.0,
          "print_error": 0,
          "active_alerts": 0
        },
        {
          "printer_id": "h2c",
          "name": "H2C",
          "state": "RUNNING",
          "percent": 97,
          "layer": 50,
          "total_layers": 50,
          "remaining_minutes": 3,
          "job_name": "świeczka-24.stl",
          "nozzle_temp": 230.0,
          "nozzle_target": 230.0,
          "bed_temp": 35.0,
          "bed_target": 35.0,
          "print_error": 0,
          "active_alerts": 3
        }
      ]
    },
    {
      "type": "command_result",
      "command_id": "cap-1",
      "ok": true,
      "error": null
    }
  ]
}