Get-onto-the-Cloud

The Gateway Application is comprised of 3 python files: deviceManager.py, d2cMsgSender.py and uartCentralGW.py.

• deviceManager.py is used to add a device to the Hub. This is just a modified version (i.e. modified so that it works on Python 3.6.3) of the example here… https://azure.microsoft.com/en-us/resources/samples/iot-hub-python-get-started/.
• d2cMsgSender.py is used to generate the SAS Token. This is just a modified version (i.e. modified so that it works on Python 3.6.3) of the example here… https://azure.microsoft.com/en-us/resources/samples/iot-hub-python-get-started/.
• uartCentralGW.py is the main application file. It’s based on the example here… https://kevinsaye.wordpress.com/2016/09/16/connect-to-azure-iot-hub-from-python/

Prerequisites:

• Python 3.6.3 is installed
• Install requests library (pip install requests)
• Install paho-mqtt library (pip install paho-mqtt)
• Install pyserial library (pip install pyserial)
• Download the Baltimore Cyber Trust Root Certificate.
• Modify uartCentralGW.py so that BaltimoreCyberTrustRootCER path is set to the path where you stored the certificate
• Modify uartCentralGW.py so that connectionString is set to your Hub’s Connection String

Usage:
uartCentralGW.py <serial port> <devicename>
serial port: Serial port to use (e.g. COM8, use Windows Device Manager to determine port number)
devicename: name of device (e.g. Sensor1) that will be added to the Hub

When launched, the Gateway Application will send the scan command to the BLE UART Central Device. The BLE UART Central Device will then scan for a Sensor that supports the Nordic UART Service. If it successfully connects with the Sensor, the Gateway Application will add the name of sensor to the Hub, create a MQTT Client, connect to the Hub, and then start sending temperature measurements to the Hub.