nodemcu-ssdp's Introduction

NodeMCU rgb led controller with SSDP capability.

Installation

You should use latest firmware from nodemcu-firmware with multicast support
Place these files on top of NodeMCU-httpserver.
Add upnp.lua and http/rgb.lua to list of files to compile.
Add dofile("upnp.lc") after dofile("httpserver.lc")(80).
Yo should see "OVOI RGB controller" in your upnp browser.
it is working at least in windows network browser and upnp-inspector.

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nodemcu-ssdp's Issues

UPnP failing on latest NodeMCU builds

I have been using your piece of code successfully on the NodeMCU firmware, until the latest modifications to the network layer.
I modified your code to make it compatible with the changes to the UDP commands: changing from net.createServer to net.createUDPSocket.

net.multicastJoin(wifi.sta.getip(), "239.255.255.250")

local ssdp_notify = "NOTIFY * HTTP/1.1\r\n"..
"HOST: 239.255.255.250:1900\r\n"..
"CACHE-CONTROL: max-age=100\r\n"..
"NT: upnp:rootdevice\r\n"..
"USN: uuid:c5baf4a1-0c8e-44da-9714-ef01234"..string.format("%x",node.chipid()).."::upnp:rootdevice\r\n"..
"NTS: ssdp:alive\r\n"..
"SERVER: NodeMCU/20150415 UPnP/1.1 ovoi/0.1\r\n"..
"Location: http://"..wifi.sta.getip().."/DimmableLight.xml\r\n\r\n"


local ssdp_response = "HTTP/1.1 200 OK\r\n"..
"Cache-Control: max-age=100\r\n"..
"EXT:\r\n"..
"SERVER: NodeMCU/20150415 UPnP/1.1 ovoi/0.1\r\n"..
"ST: upnp:rootdevice\r\n"..
"USN: uuid:c5baf4a1-0c8e-44da-9714-ef01234"..string.format("%x",node.chipid()).."\r\n"..
"Location: http://"..wifi.sta.getip().."/DimmableLight.xml\r\n\r\n"

notifyCount = 0

local function notify()
    notifyCount = notifyCount + 1
    if notifyCount == 3 then
        tmr.stop(3)
        notifyCount = nil
        ssdp_notify = nil
        collectgarbage()
    else
        UPnP = net.createUDPSocket()
        --UPnP:connect(1900,"239.255.255.250")
        UPnP:send(1900,'239.255.255.250',ssdp_notify)
        print("Sending notify")
        UPnP:close()
        UPnP = nil
        notify = nil
        collectgarbage()
    end


end

local function response(connection, payLoad)
        if string.match(payLoad,"M-SEARCH") then
            connection:send(1900,'239.255.255.250',ssdp_response)
            print("sent "..node.heap())
        end
end


tmr.alarm(3, 10000, 1, notify())




UPnPd = net.createUDPSocket()

UPnPd:on("receive", response )
--[[
UPnPd:on("sent", function(connection, payLoad) 
         print("sent "..node.heap())
       
      end)]]--
UPnPd:listen(1900,"239.255.255.250")

This code runs fine, until the response function is called.
The code then fails with: PANIC: unprotected error in call to Lua API (upnp2.lua:46: illegal value)
Which means connection:send(1900,'239.255.255.250',ssdp_response) fails.

So far I was not able to find out what is triggering this.
Any ideas/suggestions?

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