Do anyone have idea how to get altitude values to ground station without using 2.4ghz
Tried using Arduino rf but it's not working any other methods
what ground station equipment are you using?
You need a RF connection to send the data to the ground station.
Arduino RF does not have range. Try FRSky two way recievers with sensors. ALso Eagletree systems can do it.
http://www.dronetrest.com/t/beginners-guide-to-drone-autopilots-flight-controllers-and-how-they-work/1380
check above link for more information
regds