Making wearables with NodeMCU - FOSDEM 2017
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NodeMCU is an open hardware IoT platform based on eLua for the ESP8266 microcontroller. It allows creating low-cost projects using Wi-Fi and easy scripting in Lua, which makes it great for making wearables, for example. In this talk I'll give an introduction to the platform, show how I built an audio reactive graduation dress and share the materials to get you started on your own wearable project. This talk is ideal for beginners to hardware hacking or Lua enthusiasts looking for project inspiration.
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Making wearables with NodeMCU - FOSDEM 2017
- 1. Making wearables with NodeMCU Etiene Dalcol @etiene_d
- 4. @etiene_dFOSDEM 2017 A Lua MVC web framework sailorproject.org
- 7. @etiene_dFOSDEM 2017 Lua Space The Lua community blog lua.space
- 8. @etiene_dFOSDEM 2017 What’s NodeMCU Demo* Resources * subjected to randomness and despair
- 11. @etiene_dFOSDEM 2017 Specs • CPU @ 80 MHz (default) or 160 MHz • Memory 64 KB instruction, 96 KB data • Input 16 GPIO pins • Power 3.3 VDC • Price: 3$-10$
- 12. @etiene_dFOSDEM 2017 Specs 2 Kb (Arduino Uno) 16 MHz (Arduino Uno) • CPU @ 80 MHz (default) or 160 MHz • Memory 64 KB instruction, 96 KB data • Input 16 GPIO pins • Power 3.3 VDC • Price: 3$-10$
- 13. @etiene_dFOSDEM 2017 ESP8266 module Dev board + AI-Thinker
- 15. @etiene_dFOSDEM 2017 ESP8266 module (ESP-12) Dev board + AI-Thinker
- 20. @etiene_dFOSDEM 2017 0 - Get the drivers if necessary: http://www.wch.cn/download/CH341SER_MAC_ZIP.html 1 - Build the firmware: http://nodemcu-build.com 2 - Flash the firmware: https://github.com/espressif/esptool pip install esptool ls /dev/cu.* esptool.py --help esptool.py --port <serial-port-of-ESP8266> write_flash -fm dio 0x00000 <nodemcu- firmware>.bin 3 - Get an editor / uploader: http://esp8266.ru/esplorer/ Getting started
- 21. Demo time!
- 23. @etiene_dFOSDEM 2017 wifi.setmode(wifi.SOFTAP) local IP = “192.168.0.10” -- optional wifi.ap.setip({ip=IP,netmask=“255.255.255.0"}) -- same wifi.ap.config{ssid="My_network_id",pwd="my_password"} print(wifi.ap.getip()) local srv=net.createServer(net.TCP) srv:listen(80,function(conn) conn:on("receive", function(client,request) local buf = “<h1>Welcome to our NodeMCU demo</h1> client:send(buf); client:close(); collectgarbage(); end) end) Serving a web page
- 27. @etiene_dFOSDEM 2017 -- github.com/Etiene npx.fill_buffer(c.violet) npx.color_pixel({3,3},c.yellow) animate.fade() Custom libraries
- 28. @etiene_dFOSDEM 2017 Tips and tricks 1 - You can combine Lua’s coroutines with tmr.alarm to create complex animations 2 - Add a timer delay on your init.lua 3 - Performance tricks: - Get the scope of the project right - Get the scope of your variables right - Precompile your files using node.compile()
- 30. @etiene_dFOSDEM 2017 • http://hackaday.com/tag/esp8266/ • http://hackaday.com/2017/01/17/led-strip-display- gives-you-two-ways-to-see-the-music/ • http://hackaday.com/2016/11/19/jenkins-and-slack- report-build-failure-light-the-beacons/ • cutecircuit on instagram • http://github.com/Etiene/silverhaze Cool projects for inspiration
- 31. @etiene_dFOSDEM 2017 • http://nodemcu.com • https://nodemcu.readthedocs.io/en/master/ • http://esp8266.com • http://www.esp8266.com/wiki/doku.php Resources
- 32. @etiene_dFOSDEM 2017 • Community • Lua mail list: http://www.lua.org/lua-l.html • #LuaLang on Twitter • Lua community blog: http://lua.space • Lua’s subreddit: http://reddit.com/r/lua • Lua’s IRC channel: irc.freenode.net #lua • Books • Programming in Lua: http://www.lua.org/pil/ • Lua Programming Gems: http://www.lua.org/gems/ • Misc • CodeCombat: https://codecombat.com Lua Resources