Building a Weather Station with the RaspberryPi

Transcript

1. Building a Weather Station with the RaspberryPi Lukas Prasuhn M3 TechTalk #78 Sept, 1st 2017
2. About Me - Lukas Prasuhn - From Germany, near Hameln - In Japan for already ~12 years - Github: lukasjapan - RaspberryPi Bluetooth Speaker (without PulseAudio) - Favourite Languages - Kotlin - Ruby - C++ around here
3. Index - (little long) Introduction - Architecture and Used Technologies - Demo - (rather short) Closing
4. (little long) Introduction
5. (little long) Introduction (1) - Why building a Weather Station? - Ok, this is going to take some time to explain - I made the R2D2 Speaker! - ...and said that I wanted to build a bigger one… - ...so I did!
6. (little long) Introduction (2) Wait, what?! Here it is!
7. (little long) Introduction (3) Oh...
8. (little long) Introduction (4) (Still work in progress here)
9. (little long) Introduction (5) - How does this connect to a weather station? - We will get to it… - I wanted to try to add one more feature...
10. (little long) Introduction (6) - A beer cooling compartment! - Peltier element - Hot side, cold side - Uses lots of energy and not so powerful - but small - Used in digital cameras/surgery tools, etc - Powered by Solarpanel (or battery)
11. (little long) Introduction (7) - Finished! - Now I want to measure the efficiency of the cooling compartment - How?
12. (little long) Introduction (8) - Option A) Buy a temperature logger - easy - fast - 2.000-3.000 Yen - Option B) Buy a sensor for the Raspberry Pi and work with that - takes lots of work - takes lots of time - but it is fun
13. (little long) Introduction (9) - Yes! Option B! - Bosch BME280 - Temperature - Humidity - Air Pressure - Build a Weather Station - Constant logging - Visualizing - Accessing by Web
14. Architecture and Used Technologies
15. Architecture I2C Protocol Logger Daemon Web Server DB WiFi (or LAN)
16. Reading the sensor data from the BME280 - SWITCHSCIENCE/BME280/blob/master/Python27/bme280_sample.py - Ruby Gem - lukasjapan/i2c-bme280 - built by reading the Datasheet and above sample script - later I found a driver collection gem where the bme280 was included :(
17. Data Logger - Ruby script - 　 - loop that inserts data - ActiveRecord - can be stopped by SIGINT and TERM signal
18. Web Server - Used Libraries (1) - SPA Reactive Solution - Sinatra - index.html - latest data API (.json) - data by time range API (.json) - Vue.js - Reactive Frontend Framework - Fast to get results - rather slim - Made in China (by former Google employee)
19. Web Server - Used Libraries (2) - Webpacker - JavaScript asset management pipeline - Builds ‘packs’ of JavaScript - Modular Architecture - Transpiling Plugins - Minifying Plugins - ... - ElementUI - GUI Elements for Vue.js - Chart.js - Chart Library for Frontend Application - HTML5 Canvas Element - very vertasile
20. VPS Demo tethering DB Internet Web Server Logger Daemon Source code available at: lukasjapan/bme280-web
21. Some graphs just in case...
22. Some graphs just in case...
23. Some graphs just in case...
24. (rather short) Closing
25. (rather short) Closing - How about the Suitcase speakers cooling compartment? - Measuring before/after 30 minutes - just 4 degrees difference - back in less than 1 minute - possible causes - peltier element is too weak - I have to improve isolation (... a lot)