From 9fda5604ea200a73dda435961c1f6e18017dcde5 Mon Sep 17 00:00:00 2001
From: Thijs Driessen <thijsdriessen@tudelft.nl>
Date: Fri, 21 Nov 2025 10:39:45 +0100
Subject: [PATCH] Made 100 measurements and moved the pics

---
 Manual/4_Module_2.ipynb | 52 ++++++++++++++++++++++++++++++++++++-----
 1 file changed, 46 insertions(+), 6 deletions(-)

diff --git a/Manual/4_Module_2.ipynb b/Manual/4_Module_2.ipynb
index db42bb9..f98c81a 100644
--- a/Manual/4_Module_2.ipynb
+++ b/Manual/4_Module_2.ipynb
@@ -104,14 +104,12 @@
    "source": [
     "### Student Version ###\n",
     "\n",
-    "# TODO: Establish a serial connection, ask for a status report, read it out, and print it\n",
     "serial = Serial('COM4', 115200)\n",
     "serial.write(b'Sd\\n')\n",
     "status = serial.read_until(b\"\\x04\")\n",
     "status = status.decode('utf-8')\n",
     "print(f\"Car status is:\\n\\n{status}\")\n",
     "\n",
-    "# TODO: Close the serial connection\n",
     "serial.close()"
    ]
   },
@@ -164,13 +162,11 @@
     "### Student Version ###\n",
     "\n",
     "def extract_dis ():\n",
-    "    # TODO: Decode the status response to a string\n",
     "    serial = Serial('COM4', 115200)\n",
     "    serial.write(b'S\\n')\n",
     "    _status = serial.read_until(b'\\x04')\n",
     "    _status = _status.decode('utf-8')\n",
     "\n",
-    "    # TODO: Split the status string into lines\n",
     "    lines = _status.splitlines()\n",
     "\n",
     "    # Initialize variables to hold distance values\n",
@@ -180,7 +176,6 @@
     "    # Iterate over each line to find distance data\n",
     "    for line in lines:\n",
     "        if \"Dist.\" in line:\n",
-    "            # TODO: Split the line into words\n",
     "            words = line.split()\n",
     "            # Extract distance values based on their positions\n",
     "\n",
@@ -193,6 +188,8 @@
     "    print(f\"Left Distance: {dist_L}\")\n",
     "    print(f\"Right Distance: {dist_R}\")\n",
     "\n",
+    "    serial.close()\n",
+    "\n",
     "    return dist_L, dist_R"
    ]
   },
@@ -229,7 +226,50 @@
    "cell_type": "code",
    "outputs": [],
    "execution_count": null,
-   "source": "### Student Version ###\n"
+   "source": "serial.close()"
+  },
+  {
+   "metadata": {},
+   "cell_type": "code",
+   "outputs": [],
+   "execution_count": null,
+   "source": [
+    "### Student Version ###\n",
+    "times = []\n",
+    "new_times = []\n",
+    "total_time = 0\n",
+    "summed_times = 0\n",
+    "serial = Serial('COM4', 115200)\n",
+    "\n",
+    "for i in range(100):\n",
+    "    start_time = time.time()\n",
+    "    serial.write(b'S\\n')\n",
+    "    _status = serial.read_until(b'\\x04')\n",
+    "    _status = _status.decode('utf-8')\n",
+    "    current_time = time.time() - start_time\n",
+    "    times.append(current_time)\n",
+    "\n",
+    "serial.close()\n",
+    "#print(times)\n",
+    "\n",
+    "for j in range(100):\n",
+    "    total_time += times[j]\n",
+    "\n",
+    "average = total_time / 100\n",
+    "\n",
+    "for k in range(100):\n",
+    "    new_times.append((times[k] - average) ** 2)\n",
+    "    summed_times += new_times[k]\n",
+    "\n",
+    "variance = summed_times / 100\n",
+    "standard_deviation = (variance) ** 0.5\n",
+    "\n",
+    "print(f'The average time of a distance measurement is: {average:.3f} [s]')\n",
+    "print(f'The standard deviantion of a distance measurement is: {standard_deviation:.3f} [s]')\n",
+    "\n",
+    "plt.hist(times)\n",
+    "plt.show()"
+   ]
   },
   {
    "metadata": {},