UDP Broadcast Receiving

[Pflug 4]

Hi.

 

After reading and trying a lot I still have not managed to get the lua code right ?

 

Does someone have some instruction/sample code on how to read UTP Broadcast messages?

 

At last I have tried this code:

----------------------------------------------

local rxmsg = nil
local IPorErrorMsg = ""
 

local UDPsocket = Net.FUdpSocket()

UDPsocket = Net.FUdpSocket("192.168.1.13",50222)
 

local rxmsg, IPorErrorMsg = UDPsocket:settimeout(1)
local rxmsg, IPorErrorMsg = UDPsocket:receive()

 

fibaro.debug( "Received : " .. rxmsg )

 

-------------------------------------------------

 

But I do not even get an output from

fibaro.debug( "Received : " .. rxmsg )

 

Any help is highly appreciated!!

 

Thanks

 

 

Edited October 10, 2019 by Pflug
UTP should be UDP

[10der 832]

notice sockets libs included by FIBARO core only in VDs

 

[10der 832]

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[Pflug 4]

Hi and thank you very much for your reply

 

I am trying to understand what you are doing there and as usual I do not really get it ;-(

So I have a few questions here:
1. Do we need to broadcast something before receiving? 

2. Where did you find the documentation for the: Net.FUdpSocket() ?? like:

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etc.
The FIBARO_System_Lua_API.pdf did not give me any answers

 

I am googling for days now and I could only find this:

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and non of the functions work as discribed

 

Maybe I should specify what I am trying to do here.

The WeatherFlow Smart Weather Station's hub broadcasts UDP messages over port 50222 on the local network.

the Weatherflow UDP reference ( can be found here: 

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 )

specifies all broadcasted messages.

 

I have also verified with Wireshark that the station is indeed broadcasting via the published port (50222)  and I can see messages like this: 

ÿÿÿÿÿÿ°8)L#E$ÿuÀ¨ ÿÿÿÿÄ.Ä.l¤{"serial_number":"SK-000xxxxx","type":"rapid_wind","hub_sn":"HB-000xxxxx","ob":[1570779681,3.17,55]}

Decoding this and placing it into a table will be the next challenge
 

Thanks for helping
Jürgen

[10der 832]

9 minutes ago, Pflug said:

WeatherFlow Smart Weather Station's

WOW!

Measured variables & features:

• Outdoor temp, humidity, dew point, feels like temp.
• Station pressure & sea-level pressure
• Wind speed, wind direction, average & gusts
• Lightning activity (approx. strikes and distance)
• Rain onset, intensity, duration and approx. accumulation
• Wind chill, wet bulb temp, DeltaT, Air Density
• UV index, brightness, solar radiation

i have Qubino Weather Station 

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 but now this device not support yet. it's pain

[Pflug 4]

The WeatherFlow station is indeed very cool.
It detects raindrops!

.. and yesterday it detected lightning in the area

...and hopefully we will soon see some rain after 6 month without rain!

 

I know that 

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 has already intergrated the WeatherFlow  into his UHAS system.
He seems to be very busy and but unfortunately he has not published it yet.

 

I need the Weatherflow station to mainly read out the "Solar radiation per m^2"
I need that information to calculate what power output I can expect from my solar system.
 

[10der 832]

look on you with admiring envy

[Pflug 4]

Sorry but I have to ask again:

 

1. Do we need to broadcast something via UDP before receiving??? 

2. Where did you find the documentation for the: Net.FUdpSocket() ??

[10der 832]

6 minutes ago, Pflug said:

Do we need to broadcast something via UDP before receiving??? 

1st send  packet

2nd read (waiting) packets some time 

 

7 minutes ago, Pflug said:

. Where did you find the documentation for the: Net.FUdpSocket() ??

idk. maybe nowhere.

[xAPPO 18]

On 10/10/2019 at 12:37 PM, Pflug said:

Does someone have some instruction/sample code on how to read UTP Broadcast messages?

 

Did you ever get UDP receive of broadcast packets working into HC ?

Edited July 24, 2020 by xAPPO

[pflugj 13]

12 hours ago, xAPPO said:

 

Did you ever get UDP receive of broadcast packets working into HC ?

Unfortunately NO!
I could not find any docu about UDP receiving. So I gave up after weeks of No success
It looks like UDP receive is NOT avilable in HC2 :-(

 

..but with an raspberry pi acting as UDP receiver and MQTT-Broker it is possible to retrieve MQTT  messages.

 

The very clever "10der" has provided an MQTTY receiver code for HC2 and after some adjustments I am now retrieving my WeatherFlow messages via MQTT?
 

[10der 832]

33 minutes ago, pflugj said:

It looks like UDP receive is NOT avilable in HC2 :-(

 

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[pflugj 13]

Thanks for this:-)

I do not get it .

The messages from the Wetherflow Hub are broadcast
from IP: 192.168.1.31 and port:50222

 

so I changed 

local ip = '192.168.1.31'
local port = 50222

..but where do I find the received messages?

 

 

 

[10der 832]

9 minutes ago, pflugj said:

Thanks for this:-)

I do not get it .

The messages from the Wetherflow Hub are broadcast
from IP: 192.168.1.31 and port:50222

 

so I changed 

local ip = '192.168.1.31'
local port = 50222

..but where do I find the received messages?

 

 

 

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[pflugj 13]

I did put the code here:

local selfId = fibaro:getSelfId()
local socket = Net.FUdpSocket()
-- with ip and port directly it does works as well
-- socket = Net.FUdpSocket(ip, port)
socket:setBroadcast(true)

local ip   = '192.168.1.31'
local port = 50222

 

Output:

 

[DEBUG] 10:22:58: false

 

[10der 832]

@pflugj idk how work your meteostation!

1) it broadcasting periodicaly?

2) it can response on req?

3) if 2 than do you know req pacage format?!

Edited July 27, 2020 by 10der

[pflugj 13]

1. The station is reporting periodically!

 

I receive the messages on a local Raspberry Pi and then via MQTT Broker on the HC2

 

UDP & API Data Access are dicribed here.
I believe you can "NOT Request" data via UDP only via RESTful API ... butt this requires Internet Connection!

the link:

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[10der 832]

@pflugj I havnt HC2

so i have edit code in notepad

 

local udp = Net.FUdpSocket() -- create socket

udp:setBroadcast(true) -- enable broadcating
udp:setReadTimeout(0)  -- infinity

udp:write("test","255.255.255.255", 50222) -- magic here!

 

-- waiting message

local rxMsg = nil
    local ipOrErrorMsg = ""
    -- repeat until the queue of all the device responses has been processed
    repeat
        rxMsg, ipOrErrorMsg = udp:read()
        if (rxMsg and string.len(rxMsg) > 0) then
            fibaro:debug(ipOrErrorMsg)

        end
        fibaro:sleep(1000)
    until (not rxMsg or string.len(rxMsg) <= 0)
 

[pflugj 13]

... Sorry

still nothing in the debug windows :-(

fibaro:debug(ipOrErrorMsg)   - NO output 

[10der 832]

@pflugj as i can understand station broadcat periodicaly.

you can catch packet when you running, 

so script should hang here

rxMsg, ipOrErrorMsg = udp:read()

and waiting when somethig exists.

 

so just run this

 

 

local udp = Net.FUdpSocket() -- create socket

udp:setBroadcast(true) -- enable broadcating
udp:setReadTimeout(0)  -- infinity

udp:write("test","255.255.255.255", 50222) -- magic here!

local rxMsg, ipOrErrorMsg = udp:read()

fibaro.debug(rxMsg)

fibaro.debug(ipOrErrorMsg )

 

when station send broadcast  VD shloud continue to running and print two chars

[pflugj 13]

still blank screen ;-(