From 092963c511a4850cd9542cffb7b25724991421ac Mon Sep 17 00:00:00 2001
From: Jake <realrobotshk@gmail.com>
Date: Sun, 6 Jul 2025 18:44:13 +0800
Subject: [PATCH] added content for 3rd robot lesson

---
 data/lessons.js   | 32 +++++++++++++++++++++++---------
 pyodide-worker.js |  2 +-
 2 files changed, 24 insertions(+), 10 deletions(-)

diff --git a/data/lessons.js b/data/lessons.js
index 153411b..cca8f76 100644
--- a/data/lessons.js
+++ b/data/lessons.js
@@ -1101,25 +1101,39 @@ robot.turn(0)
     level: 'robot',
     map: 'Level 3',
     content: `
-      <p>Turning is very similar to moving, we use the <code>robot.turn(amount)</code> function.</p>
-      <p>The <code>amount</code> parameter is a number between -1 and 1, where -1 is full left, 0 is no turn, and 1 is full right.</p>
+      <p>We can't do much just by moving a robot using delays, so lets start using its sensors.</p>
+      <p>The <code>robot.get_distance_left()</code> function returns the length of the left sensor beam.</p>
+      <p>When there is something blocking it, it gets smaller, and you can use this to detect obstacles.</p>
 
+      <p>Try this code, and watch the console output:</p>
       <pre><code>
 import robot 
 import time
 
-robot.turn(1)
-time.sleep(2) 
-robot.turn(0)
+robot.move(0.5)
+while True:
+    distance = robot.get_distance_left()  # Get the distance from the left sensor
+    print(distance)  # Print the distance
+    time.sleep(0.1)  # Wait for on tenth of a second
 </code></pre>
 </br>
-<p>This code causes the robot to turn right at max speed for 2 seconds, then stop.</p>
+<p>Note how the distance changes as the robot moves.</p>
+<p>We can use this to automatically steer around obstacles.</p>
+<p>Add the following code AFTER the <code>print(distance)</code> line:</p>
+<pre><code>
+if distance < 50:  # If the distance is less than 0.5 meters
+    robot.turn(1)  # Turn right at max speed
+else:
+    robot.turn(0)  # Stop turning
+</code></pre>
+</br>
+<p>If you want to get the length of the right sensor, it's <code>robot.get_distance_right()</code>.</p>
 
-<p>You'll need to combine moving, turning, and waiting to reach all the checkpoints.</p>
-<p><strong>Note:</strong> The values for move, turn, and sleep can all be decimal numbers (floats). ie <code>time.sleep(0.5)</code> or <code>robot.move(0.8)</code></p>
+</br>
+<p><strong>Note:</strong> Having that short <code>time.sleep(0.1)</code> is very important, if the loop runs too fast it overwhelms the system and nothing will happen.</p>
       `,
     objectives: [
-      "Reach the first checkpoint",
+      "Reach the checkpoint",
 
       "Code should complete without errors"
     ],
diff --git a/pyodide-worker.js b/pyodide-worker.js
index dbe920a..7385022 100644
--- a/pyodide-worker.js
+++ b/pyodide-worker.js
@@ -122,7 +122,7 @@ class RobotModule:
             deg = -1
         elif deg > 1:
             deg = 1
-        deg = deg/250
+        deg = deg/150
         send_to_main("turn", deg)
 
 robot = RobotModule()