Cheap Rc Glider Telemetry

I'am working now on simple low-cost telemetry for RC models. The main parts needed for build are:

• Atmega8 with accesories (16MHz) or Atmega328, Arduino UNO, Arduino NANO or similar MCU with minimal Flash space of 8kB (from 1,5€ - local stock)
• BMP180 barometric sensor (upt to 2€ - ebay)
• 2x nRF24L01 2.4Ghz wireless with max 200m distance or better (approx. 2€ for pair - ebay)
• piezo buzzer
• optional: 10k, 20k resistor for voltage divider - baterry voltage measurements
• optional: thermal sensor for in-cockpit thermal measurements

The main idea was to measure raw pressure, temperature and battery voltage data and send them via wifi module to pilot. Here will be the data re-computed to real numbers and anoed to pilot. The pilot can read the data in different ways. Vario output will be in form of beeping sound, thermal and battery will be in form of one or more led indicators. The main prototype was realizes in arduino IDE. COmpilation size for all needed