aws_iot_smarthome

AWS IoT Smarthome Application

This application is designed to show how to connect only 1 EMSK and AWS IoT Cloud using embARC. The connection between EMSK and AWS IoT Cloud is secured by TLS.

Hardware and Software Setup

Required Hardware

• DesignWare ARC EM Starter Kit(EMSK)
• Digilent PMOD WiFi(MRF24WG0MA)
• Digilent PMOD TMP2
• SD Card
• WiFi Hotspot(SSID:embARC, Password:qazwsxedc, WPA/WPA2 encypted)

Required Software

• Metaware or ARC GNU Toolset
• Serial port terminal, such as putty, tera-term or minicom

Hardware Connection

1. Connect PMOD WiFi to J5, connect PMOD TMP2 to J2.

2. Configure your hardware with proper core configuration.

User Manual

Before running this application

Prepare you own AWS IoT account, and create required thing. Before compiling this example, you need to change macro AWS_IOT_MQTT_HOST in src/aws_iot_config.h to your own aws iot cloud mqtt host, and create an aws iot thing named SmartHome, you can refer to Gettting Started with AWS IoT for details, and generate certificates and download them and rename them to the ones under src/cert/smarthome/.

We also provided an application note about Using a Smart Home Iot Application with EMSK.

Copy src/cert/ folder to root folder of the EMSK SD card, in SD card, the cert folder should be cert/.

The hardware resources are allocated as following table.

Hardware Resource	Represent
BUTTON R	Livingroom Lights Control
LED 0-1	Livingroom Lights Status(On or Off)
BUTTON L	Kitchen Lights Control
LED 2-3	Kitchen Lights Status(On or Off)
BUTTON X	Front Door Lock Control
LED 4-5	Front Door Lock Status(On or Off)
LED 7	WiFi connection status(On for connected, Off for not)
LED X	Node working status(toggling in 2s period if working well)
PMOD TMP2	Temperature Sensor
PMOD WiFi	Provide WiFi Connection

EMSK can send the status of the Room Temperature, FrontDoor Lock status, LivingRoom Light status and Kitchen Light status to the AWS IoT and interact with AWS IoT Cloud with using embARC.

Open dashboard website, and load dashboard-smarthome-singlething.json dashboard configuration file in current folder, and then you can control and monitor this single node.

After loading this configuration file, you also need to click at the setting icon, and then click on the aws datasource, and then change the AWS IOT ENDPOINT, REGION, ACCESS KEY, SECRET KEY to your own aws ones.

The JSON Document in the AWS IoT cloud is shown below.

   {
     "reported": {
       "temperature": 0.00,
       "DoorLocked": false,
       "KitchenLights": false,
       "LivingRoomLights": false
     },
     "desired": {
       "DoorLocked": false,
       "KitchenLights": false,
       "LivingRoomLights": false
     }
   }

Run this application

Here take EMSK2.2 - ARC EM7D with Metaware Toolset for example to show how to run this application.

1. Open Windows or Linux terminal, and cd to src folder.

2. To build this applicaiton, select the proper board version, core configuration and build with selected toolchain using this command gmake BD_VER=22 CUR_CORE=arcem7d TOOLCHAIN=mw :

embarc_osp\application\aws_iot_smarthome\src>gmake BD_VER=22 CUR_CORE=arcem7d TOOLCHAIN=mw
"Creating Directory    : " obj_emsk_22/mw_arcem7d/application/.
"Creating Directory    : " obj_emsk_22/mw_arcem7d/arc
... ...
"Assembling            : " ../../../../arc/startup/arc_startup.s
"Compiling             : " ../../../../arc/startup/arc_cxx_support.c
"Generating Linkfile   : " obj_emsk_22/mw_arcem7d/linker_mw.ldf
"Compiling             : " main.c
"Compiling             : " ../../../../device/designware/spi/dw_spi.c
"Compiling             : " ../../../../device/designware/iic/dw_iic.c
"Compiling             : " ../../../../device/designware/uart/dw_uart.c
"Compiling             : " ../../../../device/microchip/mrf24g/mrf24g_adapter.c
... ...
"Archiving             : " obj_emsk_22/mw_arcem7d/libmidcommon.a
"Archiving             : " obj_emsk_22/mw_arcem7d/libmidaws.a
"Archiving             : " obj_emsk_22/mw_arcem7d/libmidlwip.a
"Archiving             : " obj_emsk_22/mw_arcem7d/libmidfatfs.a
"Archiving             : " obj_emsk_22/mw_arcem7d/libembarc.a
"Linking               : " obj_emsk_22/mw_arcem7d/freertos_iot_aws_smarthomedemo_mw_arcem7d.elf

All object files are generated under the obj_emsk_22/mw_arcem7d folder according to your choice. The application elf file is also generated in that folder.

3. Connect PMOD WiFi to J5, PMOD TMP2 to J2.

4. Plug the USB cable into the J7 port(JTAG and USB-UART) on EMSK, power on the board, and setup your WiFi hotspot.

5. Configure the EMSK 2.2 to ARC EM7D core by setting the dip switch bit 1-2 all to OFF, then reload the core configuration by press the button above C character on board.

6. Open your serial terminal such as Tera-Term on PC, and configure it to right COM port and 115200bps.

7. Run this application using this command gmake BD_VER=22 CUR_CORE=arcem7d TOOLCHAIN=mw run :

8. Interact using EMSK and Dashboard.

• You can press the button L/R/X to see the led changes on board and also on dashboard web app.
• You can also click the lights of DESIRED STATUS pane on the dashboard app, and see the led changes on board and dashboard web app.