Script node gpio docs added example

Author: Erol444

docs/source/components/nodes/script.rst

@@ -120,6 +120,24 @@ In the script node you can interface with GPIOs of the VPU using module GPIO. Cu
   GPIO.PullDownUp: GPIO.PULL_NONE, GPIO.PULL_DOWN, GPIO.PULL_UP
   GPIO.Edge: GPIO.RISING, GPIO.FALLING, GPIO.LEVEL_HIGH, GPIO.LEVEL_LOW
 
+Here's **an example** of toggling GPIO pin 40 inside Script node from the host (via :ref:`XLinkIn``). On `OAK-SoM-Pro <https://docs.luxonis.com/projects/hardware/en/latest/pages/BW2099.html>`__,
+GPIO 40 drives FSYNC signal for both 4-lane cameras, and we have used the code below for this exact reason.
+
+.. code-bloc:: python
+
+  import GPIO
+  MX_PIN = 40
+
+  ret = GPIO.setup(MX_PIN, GPIO.OUT, GPIO.PULL_DOWN)
+  toggleVal = True
+
+  while True:
+    data = node.io['in'].get()  # Wait for a message from the host computer
+
+    node.warn('GPIO toggle: ' + str(toggleVal))
+    toggleVal = not toggleVal
+    ret = GPIO.write(MX_PIN, toggleVal)  # Toggle the GPIO
+
 Using DepthAI :ref:`Messages <components_messages>`
 ###################################################