diff --git a/logger/tests/data/sample_log.json b/logger/tests/data/sample_log.json
new file mode 100644
index 0000000..42a552c
--- /dev/null
+++ b/logger/tests/data/sample_log.json
@@ -0,0 +1,34 @@
+[
+  {
+    "timestamp": "2024-05-01T12:00:00Z",
+    "led_id": "LED_A1",
+    "lumens": 120.5,
+    "peak_wavelength": 450.2,
+    "latitude": 48.1351,
+    "longitude": 11.5820
+  },
+  {
+    "timestamp": "2024-05-01T12:00:05Z",
+    "led_id": "LED_A1",
+    "lumens": 121.8,
+    "peak_wavelength": 450.0,
+    "latitude": 48.1351,
+    "longitude": 11.5820
+  },
+  {
+    "timestamp": "2024-05-01T12:00:10Z",
+    "led_id": "LED_B2",
+    "lumens": 98.3,
+    "peak_wavelength": 520.5,
+    "latitude": 48.1352,
+    "longitude": 11.5821
+  },
+  {
+    "timestamp": "2024-05-01T12:00:15Z",
+    "led_id": "LED_B2",
+    "lumens": 99.7,
+    "peak_wavelength": 520.8,
+    "latitude": 48.1353,
+    "longitude": 11.5821
+  }
+]
\ No newline at end of file