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High Altitude Python
- 1. HIGH ALTITUDE PYTHON To the stratosphere and back again Juampe López
- 2. Who I am ● I write code for embedded Linux environments ● Maker ● Python enthusiast ● Father of two (this will be important later! :))
- 3. What I’ve done ● I’ve been writing C/C++ for a decade ● I’ve been using Linux forever ● There is a lot of things around us running some kind of embedded Linux and I’ve coded some of those things
- 4. What I’d actually like to do ● Robots ● Spaceships and rockets ● Some kind of robots and rockets mash-up maybe?
- 5. What I did last february
- 6. What’s the stratosphere? Where is it? ● It’s the 2nd major layer of Earth's atmosphere ● Contains 20% of the atmosphere's mass ● It’s high but it’s not space: located between 10 km and 50 km - space starts at 100 km! ● It’s cold! Temperatures fluctuate between -55 ºC and -5 ºC depending on the altitude (higher means warmer)
- 7. What’s the stratosphere? Where is it?
- 8. How you can reach it (and come back safely) 1 - Ask air controllers for permission (better to be safe than sorry) ● ENAIRE is the air navigation manager in Spain and Western Sahara ● Public agency ● They are responsible for all air traffic control within the Spanish airspace
- 9. How you can reach it (and come back safely) 1 - Ask air controllers for permission (better to be safe than sorry) ● T-24h: e-mail ENAIRE ● T-30min: phone ZGZ, MAD and BCN control towers ● T-0: phone ZGZ control tower
- 10. How you can reach it (and come back safely) 1 - Ask air controllers for permission (better to be safe than sorry) ● The air traffic controllers will produce a NOTAM (Notice to Airmen) - an official alert for aircraft pilots regarding potential hazards along their flight route - with information about your flight
- 11. How you can reach it (and come back safely) 2 - Get an insurance - people don’t like stuff falling on their heads for free ● A 300 € fee gives the project a 900 000 € coverage for 1 year ● Just in case! ● Most incidents are related to the balloon landing on private property - but people are nice and understanding!
- 12. How you can reach it (and come back safely) 3 - Buy a big balloon and fill it with helium We got ours from: http://www.randomengineering.co.uk/Random_Aerospace/Balloons.html
- 13. How you can reach it (and come back safely) 3 - Buy a big balloon and fill it with helium ● 7.21 m3 of helium ● ~150 € ● Should be enough for a flight ● Ascent speed around 4 m/s
- 14. How you can reach it (and come back safely) 3 - Buy a big balloon and fill it with helium ● 7.21 m3 of helium ● ~150 € ● Should be enough for a flight ● Ascent speed around 4 m/s
- 15. How you can reach it (and come back safely) 4 - Add a parachute ● Ripstop nylon ● Handmade ● ~1.1 m2 area ● Must decelerate the capsule down to 7 m/s ● Tested in 3 flights
- 16. How you can reach it (and come back safely) 4 - Add a parachute ● Ripstop nylon ● Handmade ● ~1.1 m2 area ● Must decelerate the capsule down to 7 m/s ● Tested in 3 flights
- 17. How you can reach it (and come back safely) 5 - Track it ● APRS - https://aprs.fi ● Spot GPS - https://www.findmespot.com/en/
- 18. What you can do up there ● Citizen science ● Amateur radio ● Beautiful pictures and awesome videos
- 19. What you can do up there ● Citizen science ● Amateur radio ● Beautiful pictures and awesome videos
- 20. What you can do up there ● Citizen science ● Amateur radio ● Beautiful pictures and awesome videos
- 21. What you can do up there ● Citizen science ● Amateur radio ● Beautiful pictures and awesome videos
- 22. What you can do up there ● Citizen science ● Amateur radio ● Beautiful pictures and awesome videos
- 23. What you can do up there ● Citizen science ● Amateur radio ● Beautiful pictures and awesome videos
- 24. What you can do up there ● Citizen science ● Amateur radio ● Beautiful pictures and awesome videos
- 25. The Servet Project ● Citizen science out of Zaragoza ● Public funding ● It involves scientists, makers, artists and ham radio operators ● 2 flights, 3rd one is expected next summer
- 26. The Koroliov 3 capsule - hardware ● Raspberry Pi Zero ● GPS ● Barometer ● RTC clock ● OLED display ● 3D printed parts
- 27. The Koroliov 3 capsule - hardware ● Raspberry Pi Zero ● GPS ● Barometer ● RTC clock ● OLED display ● 3D printed parts
- 28. The Koroliov 3 capsule - hardware ● Raspberry Pi Zero ● GPS ● Barometer ● RTC clock ● OLED display ● 3D printed parts
- 29. The Koroliov 3 capsule - software ● Raspbian ● Python script called every minute ● Data is logged with CSV for further analysis
- 30. The Koroliov 3 capsule - the Python stuff BMP180 is a nice I2C barometer: it senses atmospheric pressure and temperature and calculates the altitude.
- 31. The Koroliov 3 capsule - the Python stuff
- 32. The Koroliov 3 capsule - the Python stuff DS1307 is an I2C RTC clock that keeps the system time using an external battery. Kernel driver is available!
- 33. The Koroliov 3 capsule - the Python stuff
- 34. The Koroliov 3 capsule - the Python stuff MTK3339 is a serial GPS capable of parsing altitude up to 40 km. It outputs GPS data every second and you can read it via USB using a USB/serial TTL converter.
- 35. The Koroliov 3 capsule - the Python stuff There is a GPS library for Python and also cool command line apps like gpsd or gpsmon.
- 36. The Koroliov 3 capsule - the Python stuff I added an OLED display for debugging while the capsule was still on the ground. The code uses the Python Image Library to create a bitmap that can be sent to the display via I2C.
- 37. Summary ● Near-space is cool ● Linux and Python are a safe bet for embedded projects ● Get the job done with Python first, optimize (if need be) later!
- 38. Thank you! Juampe López - @jotape https://github.com/simium/Koroliov3
- 39. And now for some eye candy...
- 51. Thank you! Q&A? Is it already pizza time?