How to achieve wireless communication between MICRO-CONTROLLER AND ANDROID APP

[goldriver]

I am developing a system for a uni project that requires me to transmit data from an ARDUINO micro-controller to an android app. For instance, i am reading off values from moisture,light and temperature sensors and transmitting them to the arduino micro-controller and now i would want this data to be transmitted to an android phone displaying data like:

MOISTURE LEVEL:MODERATE/HIGH/LOW
TEMP LEVEL:26 C
LIGHT:GOOD

What is the interface that i am looking for between the controller and the phone to achieve the above functionality or objectives? Does it need to be transmitted to some sort of a server before forwarding it to phone or can it be transmitted directly to phone?

Looking for answers from someone with good background knowledge of wireless communication and embedded systems.

 

[FvM]

You should go for a Bluetooth transceiver connected to your processor.

 

[paulfjujo]

have a look on this similar project
https://www.edaboard.com/threads/332940/

google with HC-05

 

[goldriver]

have a look on this similar project
https://www.edaboard.com/threads/332940/

google with HC-05

I have found two solutions by doing some research. Please shed light on both solutions

1.Connect the app to a web server which receives data using a WI-FI ROUTER from an arduino which is connected
like in this representation:

https://imgur.com/nUDjktA


2.Connect a blue-tooth transmitter module to an arduino and then transmit data to the the android phone directly. But since i am a wireless newbie, i am confused that how will the phone interpret data received from the arduino.

 

[FvM]

i am confused that how will the phone interpret data received from the arduino

The phone will do nothing on it's own, the app must be designed to do so.

 

[goldriver]

The phone will do nothing on it's own, the app must be designed to do so.

Do you recommend the second solution then?

 

[FvM]

I did already recommend it in post #2.

Of course, if your processor is already connected to LAN and you are operating your application only at a particular site, the first option may be interesting, too.

 

[goldriver]

Yes i am aware, i was just confirming it.