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esp8266:nodemcu [2015/09/20 22:00] – created niziakhome_automation:esp8266:nodemcu [2017/01/19 07:55] (current) – [Other Projects] niziak
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 After flashing NodeMCU firmware it is recommended to erase filesystem: <code lua>file.format()</code> After flashing NodeMCU firmware it is recommended to erase filesystem: <code lua>file.format()</code>
 +
 +This firmware gives LUA command line on serial console.
 +There is no direct way to upload files with lua script into module.
 +Instead of this, file is created using lua command: open file, write some strings, close file.
 +<code lua>
 +file.open("init.lua","w")
 +file.writeline([[print("WIFI control")]])
 +file.writeline([[wifi.setmode(wifi.SOFTAP)]])
 +file.close()
 +</code>
 +This method is not comfortable, better is to use tool like [[http://esp8266.ru/esplorer/]] (source on [[https://github.com/4refr0nt/ESPlorer|github]])
 +or [[https://github.com/GeoNomad/LuaLoader]] python script
  
 Online page to make online custom builds: Online page to make online custom builds:
 custom builds: http://frightanic.com/nodemcu-custom-build/ custom builds: http://frightanic.com/nodemcu-custom-build/
  
 +  * https://github.com/nodemcu/nodemcu-firmware/wiki
 +  * https://github.com/nodemcu/nodemcu-flasher
 +  * https://github.com/nodemcu/nodemcu-firmware/releases
  
  
-https://github.com/nodemcu/nodemcu-firmware/wiki +====== Programming ====== 
-https://github.com/nodemcu/nodemcu-flasher +  * Devel API (latest): [[https://github.com/nodemcu/nodemcu-firmware/wiki/nodemcu_api_en-%28dev096%29]] 
-https://github.com/nodemcu/nodemcu-firmware/releases +  * GPIO MAP: [[https://github.com/nodemcu/nodemcu-firmware/wiki/nodemcu_api_en-%28dev096%29#new_gpio_map]]
-http://esp8266.ru/esplorer/+
  
-===== Programming ===== +  * Current API: [[https://github.com/nodemcu/nodemcu-firmware/wiki/nodemcu_api_en]]
-Devel API (latest): [[https://github.com/nodemcu/nodemcu-firmware/wiki/nodemcu_api_en-%28dev096%29]] +
-Current API: [[https://github.com/nodemcu/nodemcu-firmware/wiki/nodemcu_api_en]]+
  
-==== Connect to WiFi ====+===== Saving memory ===== 
 +  * Avoid upvalues for context passed between event callbacks, as its very difficulat to get a handle on memory leaks created by these. Only use globals for this usecase. 
 +  * Nil globals once they are no longer needed so that they can be properly GCed. 
 +  * Allocate resources and create closures on a just-in-time basis. 
 +  * The cost of require or dofile is relatively small, so break your program into overlays one per event and use a small stub function as a callback to load each. 
 +    * Use compiled .lc files and load using dofile(). 
 + 
 +===== Scan WiFi ===== 
 +<code lua> 
 +function listap(t) 
 +  for k,v in pairs(t) do 
 +    print(k.." : "..v) 
 +  end 
 +end 
 +wifi.sta.getap(listap) 
 +</code> 
 +     
 +===== Connect to WiFi =====
 <code lua> <code lua>
 wifi.setmode(wifi.STATION) wifi.setmode(wifi.STATION)
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 </code> </code>
  
-==== Scan 1 wire bus ====+===== Scan 1 wire bus =====
 <code lua> <code lua>
 ow.setup(1) ow.setup(1)
-print (ow.reset(1))+print (ow.reset(1)) -- print 1 if device found
 </code> </code>
  
-===== Projects ===== +===== Resolving DNS ===== 
-==== 1-wire ==== +It is not so easy. It need socket instance which will be used only for one DNS request, then socket will be destroyed. Response is performed by callback. 
-[[http://hacklab.fi/news/esp8266-ds18b20-thingspeak-nodemcu/]]+There is sth about easier API: [[https://github.com/nodemcu/nodemcu-firmware/issues/189]] 
 + 
 +===== Compile to byte code ===== 
 +You can compile everytihn except init.lua. 
 +<code:lua>node.compile("myprog.lua")</code> 
 +Will produce myprog.lc. 
 + 
 +====== Other Projects ====== 
 +  * 1-wire temp sensor reporting to [[http://thingspeak.com]], [[http://hacklab.fi/news/esp8266-ds18b20-thingspeak-nodemcu/]] 
 +  * 1-wire temp sensor reporting to [[http://nettemp.pl]], [[http://techfreak.pl/bezprzewodowe-czujniki-na-esp8266-nettemp/]] 
 +  * [[http://techfreak.pl/bezprzewodowe-czujniki-temperatury-ds18b20-na-esp8266/]] 
 +  * 1-wire temp sensor [[https://blog.jokielowie.com/en/2015/10/domoticz-cz-2-termometr-wifi-z-precyzja-do-dwoch-miejsc-po-przecinku-czyli-esp8266-dla-poczatkujach-w-praktyce/]] 
 +  * Control 2 GPIO from Web [[http://randomnerdtutorials.com/esp8266-web-server/]] 
 +  * Http server [[https://github.com/marcoskirsch/nodemcu-httpserver]] 
 +  * Remote update [[http://www.instructables.com/id/ESP8266-WiFi-File-Management/]] [[https://github.com/breagan/ESP8266_WiFi_File_Manager]] 
 + 
 +===== Free Cloud/Server services ===== 
 +  * Thingspeak: [[http://thingspeak.com/]] 
 +  * Telit: [[http://www.telit.com/products-and-services/iot-platforms/iot-portal]] 
 +  * Google: [[https://cloud.google.com/solutions/iot/]] 
 +  * IBM: [[https://internetofthings.ibmcloud.com/#/]] 
 + 
 +todo 
 +  * https://www.google.com/search?q=ai+cloud+esp8266&ie=utf-8&oe=utf-8