ST STM32L4 Manual page 158

Step 2: Visualize and Interpret Message
•
Each message received by the device from IoT Hub is printed over serial terminal
•
Microsoft Azure IoT SDK provides means to define user specific callbacks (actions)
associated to certain commands
•
By default the application can interpret the following messages:
• Pause  pause the application
• Play  resume the application
• LedOn/LedOff  turn on/off the green LED on IoT Dk board
• LedBlink  the green LED on IoT Dk board will blink for each message received
received by device
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