diff --git a/data_logging/tests/data/sample_stream.json b/data_logging/tests/data/sample_stream.json
new file mode 100644
index 0000000..8fcd79e
--- /dev/null
+++ b/data_logging/tests/data/sample_stream.json
@@ -0,0 +1,37 @@
+[
+  {
+    "time": "12:00:01",
+    "lux": 350.5,
+    "dB": 42.3,
+    "temperature": 21.8,
+    "inference_score": 0.87
+  },
+  {
+    "time": "12:00:02",
+    "lux": 355.1,
+    "dB": 41.9,
+    "temperature": 21.9,
+    "inference_score": 0.84
+  },
+  {
+    "time": "12:00:03",
+    "lux": 358.7,
+    "dB": 43.1,
+    "temperature": 22.0,
+    "inference_score": 0.89
+  },
+  {
+    "time": "12:00:04",
+    "lux": 360.0,
+    "dB": 44.5,
+    "temperature": 22.2,
+    "inference_score": 0.92
+  },
+  {
+    "time": "12:00:05",
+    "lux": 365.4,
+    "dB": 45.0,
+    "temperature": 22.3,
+    "inference_score": 0.88
+  }
+]
\ No newline at end of file