ESP32: Websocket client ESP32 library in pure Lua

lua_examples/websocket.lua

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+-- ChiliPeppr Websocket client library for Lua ESP32
+-- This library lets you talk over a websocket using pure Lua
+-- 
+-- Visit http://chilipeppr.com/esp32
+-- By John Lauer
+--
+-- There is no license needed to use/modify this software. It is given freely
+-- to the open source community. Modify at will.
+-- 
+-- Working example of using this library:
+-- https://www.youtube.com/watch?v=ITgh5epyPRk&t=119s
+
+-- The websocket Lua library is in the lua_modules directory of the nodemcu_firmware
+-- /nodemcu-firmware/lua_modules/websocket/websocket.lua
+-- Upload it to your ESP32 and node.compile() it to get websocket.lc
+-- Then you can require() it below
+ws = require('websocket')
+ws.on("receive", function(data, fin)
+  -- fin of 1 or nil means you got all data
+  -- fin of 0 means extended data will come in
+  print("Got data:" .. data .. ", fin:", fin)
+end)
+ws.on("connection", function(host, port, path)
+  print("Websocket connected to host:", host, "port:", port, "path:", path)
+  ws.send("list")
+end)
+ws.on("disconnection", function()
+  print("Websocket got disconnect from:", ws.wsUrl)
+end)
+ws.on("pingsend", function()
+  print("Ping")
+end)
+ws.on("pongrecv", function()
+  print("Got pong. We're alive.")
+end)
+
+-- Use ChiliPeppr wifi library to auto-connect to wifi
+wf = require("esp32_wifi")
+wf.on("connection", function(info)
+  print("Got wifi. IP:", info.ip, "Netmask:", info.netmask, "GW:", info.gw)
+  ws.init(info.ip)
+  -- This sample websocket is Serial Port JSON server
+  -- Set this to your own 2nd SPJS, not the local one, or you'll get loopbacks
+  -- ws.connect("ws://10.0.0.201:8989/ws")
+  -- Example public websocket server
+  ws.connect("ws://demos.kaazing.com/echo")
+end)
+wf.init()
+