Button gateway application runs on Ci40 which acts as a gateway for MikroE boards. One of the MikroE boards acts as a client which holds button resource, and another one also acts as a client which holds led resource. Gateway application observes button resource value, and whenever there is a change in its value, gateway application gets a notification for the change, and take further actions. After receiving notification for button change, gateway application

• Updates the led resource value, which was created by led client, to on or off, depending upon button events.
• Sets the led status of same resource created by itself, so that the observer gets the notification on the change of its value.
• Sends a flow message to FlowM2M user's account with ON or OFF status of led.

Gateway application serves two purposes:

• It acts as Awalwm2m server to communicate with Awalwm2m client that is running on a constrained device.
• It acts as Awalwm2m client to communicate with Awalwm2m server on FlowM2M

Prior to running button gateway application, make sure that:

• Awalwm2m client daemon(awa_clientd) is running.
• Awalwm2m server daemon(awa_serverd) is running.
• Awalwm2m bootstrap daemon(awa_bootstrapd) is running.
• Device provisioning is done.

NOTE: Please do "ps" on console to see "specific" process is running or not.

Button Application is getting started as a daemon. Although we could also start it from the command line as :

$ button_gateway

Output looks something similar to this :

Button Gateway Application

------------------------


Client session established


Server session established


Wait until device is provisioned

Waiting...

Gateway is provisioned.


Waiting for config data

Waiting for config data

Failed to read config file

Try to connect to Flow Server for 5 more trials..


Device registration successful

Defining flow objects on server

Defining flow objects on client

Waiting for constrained device 'ButtonDevice' to be up

Constrained device ButtonDevice registered

Waiting for constrained device 'LedDevice' to be up

Constrained device LedDevice registered

Written 1 to server.


Set 1 on client.


Message sent to user = 12:36:10 18-03-2016 LED on

Written 0 to server.


Set 0 on client.


Message sent to user = 12:36:11 18-03-2016 LED off