{
  "device_model": "TempSense",
  "hardware_revision": "v2.1",
  "channel": "stable",
  "version": "1.2.0",
  "min_version_required": "1.0.0",
  "download_url": "http://192.168.100.122:8080/TempSense/v2.1/firmware-v1.2.0.bin",
  "sha256": "4b227777d4dd1fc61c6f884f48641d02b4d121d3fd328cb08b5531fcacdabf8a",
  "signature": "MEQCIGeR384nN9h0tA8qGqE7yD4L0mGz3...base64...",
  "size_bytes": 1048576,
  "critical": false,
  "release_notes": "Dual-partition OTA update with auto-rollback protection"
}