Updated prerequisites section

Author: gsteve88

articles/iot-hub/how-to-device-twins.md

@@ -38,11 +38,11 @@ This article shows you how to develop two types of applications:
 
 ## Prerequisites
 
-* **An IoT hub**. Some SDK calls require the IoT Hub primary connection string, so make a note of the connection string.
+* An IoT hub
 
-* **A registered device**. Some SDK calls require the device primary connection string, so make a note of the connection string.
+* A registered device
 
-* If your application uses the MQTT protocol, make sure that **port 8883** is open in your firewall. The MQTT protocol communicates over port 8883. This port may be blocked in some corporate and educational network environments. For more information and ways to work around this issue, see [Connecting to IoT Hub (MQTT)](../iot/iot-mqtt-connect-to-iot-hub.md#connecting-to-iot-hub).
+* If your application uses the MQTT protocol, make sure that port 8883 is open in your firewall. The MQTT protocol communicates over port 8883. This port may be blocked in some corporate and educational network environments. For more information and ways to work around this issue, see [Connecting to IoT Hub (MQTT)](../iot/iot-mqtt-connect-to-iot-hub.md#connecting-to-iot-hub).
 
 * Language SDK requirements:
   * **.NET SDK** - Requires Visual Studio.

includes/iot-hub-howto-device-twins-java.md

@@ -11,6 +11,8 @@ ms.date: 07/20/2024
 ms.custom: mqtt, devx-track-java, devx-track-extended-java
 ---
 
+  * Requires [Java SE Development Kit 8](/azure/developer/java/fundamentals/). Make sure you select **Java 8** under **Long-term support** to navigate to downloads for JDK 8.
+
 ## Overview
 
 This article describes how to use the [Azure IoT SDK for Java](https://github.com/Azure/azure-iot-sdk-java) to create device and backend service application code for device twins.

includes/iot-hub-howto-device-twins-node.md

@@ -11,6 +11,8 @@ ms.date: 07/20/2024
 ms.custom: mqtt, devx-track-js
 ---
 
+  *  Requires Node.js version 10.0.x or later
+
 ## Overview
 
 This article describes how to use the [Azure IoT SDK for Node.js](https://github.com/Azure/azure-iot-sdk-node) to create device and backend service application code for device twins.

includes/iot-hub-howto-device-twins-python.md

@@ -11,6 +11,8 @@ ms.date: 07/12/2024
 ms.custom: mqtt, devx-track-python, py-fresh-zinc
 ---
 
+  * Python SDK - [Python version 3.7 or later](https://www.python.org/downloads/) is recommended. Make sure to use the 32-bit or 64-bit installation as required by your setup. When prompted during the installation, make sure to add Python to your platform-specific environment variable.
+
 ## Overview
 
 This article describes how to use the [Azure IoT SDK for Python](https://github.com/Azure/azure-iot-sdk-python) to create device and backend service application code for device twins.