You have to make sure your device can communicate with the Worklight Server where you have deployed your application and adapter. An easy way to test this is to go into the phones mobile browser and attempt to connect to the Worklight console at a location in the form of the following:
http://"server address":"port"/"context root"/console
in your case it looks to be located at:
http://192.168.242.1:9080/krishak/console
If your application cannot connect to the console successfully it is likely your device is not on the correct wifi network in order to establish communication. Please attempt this conenction and provide an update so we can provide further investigation.