This is a functional altitude tracker that allows you to connect to a 5V pin on your RC plane. It will display current altitude and retain the highest obtained during your flight.
Hardware list:
Arduino Nano - https://amzn.to/2DdeWqt
BMP280 Barameter - https://amzn.to/2yGTUN2
0.91 Inch OLED Display 128x32 - https://amzn.to/2SxxyWQ
I2C pins are the Arduino Standard:
SDA = A4
SCL = A5
IMPORTANT: Using the Adafruit_BMP280.h you must update the I2C address in the file to:
#define BMP280_ADDRESS (0x76)