Putting it all Together: From Device to Cloud¶

This tutorial will show how to connect your Nucleo board to the cloud using a WiFi module and AT&T's M2X services.

• Gather the following hardware:
  • STM32F411 Nucleo Board
  • Multitech Systems or ACKme WiFi Module
  • Grove Shield board
  • Grove Temperature Sensor
  • Grove LED

• Connect the WiFi module to the STM32 Nucleo Ardiuno connector
• Connect the Grove Shield board to the WiFi module's Ardiuno connector
• Connect the Grove temperature sensor to port A0 and the Grove LED to port D7 of the Grove Shield board

• Plug the STM32F411 Nucleo board into your PC with a USB cable

Import the STM32 Seeed Ethernet Connect M2X or STM32 ACKme Wifi Connect M2X (depending on which module you’re using) into your mbed compiler

• At the program landing page, click on the "Import this program" button

• Click “Import” button on the pop up window shown below

• Open the main.cpp file (or in the case of ACKme, the example.cpp file) and make the following modifications:
  • Enter your M2X API key, Feed ID, Stream, and Name in the corresponding fields as shown below

Change:

To:

• Enter the SSID and password of your local WiFi hotspot

For the MTS WiFi Module

For the ACKme WiFi Module

• Compile and load the image onto the STM32F411 Nucleo board

• Open your terminal emulation program for serial communications. Set the baudrate to 9600

After you have loaded your code onto the Nucleo, the console should show your board connecting to the WiFi network. After it has successfully joined the network, the application will perform a device location update before it starts reading the temperature sensor. It reports temperature readings to your M2X “temperature” stream every 5 seconds.

• Go to your M2X account and select the blueprint created previously from Getting Started with ATT M2X

You should see a chart plot of your device’s temperature sensor data from your M2X stream as shown below.

Congratulations! You have now connected an embedded device to the cloud.