Implement function to move the table up or down for a distance of centimeters

code/table.py

@@ -1,6 +1,7 @@
 from pinouts import NodeMCU as pins
 from hcsr04 import HCSR04
 import machine
+import time
 
 
 class Table:
@@ -57,3 +58,42 @@ class Table:
         else:
             self.relay_up.value(1)
             self.relay_down.value(1)
+
+
+    def move(self, distance):
+        """
+        Move distance centimeters:
+         - Positive distances is up
+         - Negative distances is down
+         - Zero distances is stop
+        """
+
+        # Calculate target height
+        targetHeight = self.currentHeight() + distance
+
+        # Default to not move in any direction
+        direction = 0
+
+        while True:
+            # Calculate how far to move
+            currentHeightDiff = targetHeight - self.currentHeight()
+
+            # Calculate which direction to move in
+            if currentHeightDiff > 1:
+                direction = 1
+            elif currentHeightDiff < -1:
+                direction = -1
+            else:
+                # Reset the relays
+                self.triggerRelay(0)
+
+                # Break the loop
+                break
+
+            # Move up or down
+            self.triggerRelay(direction)
+
+            # Sleep for a bit
+            time.sleep(0.1)
+
+        print("my work is done")