Project Naki

Tracker for a hot-air balloon flight; or other high altitude activity

Code is written for an ATMega328p microcontroller; and interfaces with http://ukhas.org.uk/ tracking system via radio.

1. Read GPS and other sensors
2. Create telemetry string containing data
3. Transmit string using RTTY over a Radio transmitter
4. Repeat

###The tracker board has the following features:

• ATMega microcontroller with external 16Mz clock
• Reset jumper to restart the ATMega program
• ublox max7 GPS receiver
• Radiometrix NTX2 radio transmitter - allows license exempt transmitting in the UK
• SMA connector for connecting the radio antenna
• Internal temperature sensor
• External temperature sensor
• Voltage sensor to measure remaining power available
• Socket to connect to a Raspberry Pi 26 pin GPIO header
  • Programming the ATMega directly from the Pi
  • Reading serial output from the ATMega program and logging on the pi SD card
• Power jumpers to allow power from the Raspberry Pi or independent supply

###This repository contains the following:

arduino - Toolchain installation for a standard Raspberry Pi to compile payload sketch

docs - Instructions and notes (basic)

eagle - Eagle schematic and board design

payload - Tracker ATMega code/sketch and compile scripts

scripts - init.d and logging scripts to save serial output and photos to the Raspberry Pi SD card