Ikea Tradfri - Client Put is not working after a period of time

[bmachuletz]

Hi,
i am using this library to control IKEA Tradfri lamps. But after period of time the connection to my gateway seems to be broken. After restart of my application all is running fine. Maybe anyone has a good starting point to look at for investigating the problem?

Thanx
Benjamin

[jimsch]

A couple of questions.

1. what is the time interval after which it starts failing?
2. Do you have a router between the machine running the app and the Tradfri gateway?

My first guess is either a) a router is dropping the path from the table so the DTLS connection is no longer getting to the device on the same IP address pair or b) the gateway is dropping the DTLS connection after a period of inactivity. I have not see this when playing with things, but have not tried to do long lived connections.

[bmachuletz]

1. I'll check the time interval as soon as i can. the app is running on my raspberry pi compiled with mono... so i'm currently not getting notified when the problem occures.
2. The devices are connected via static ip to an AVM Fritzbox router. I'll plug the devices into another network switch and look what will happen :)
   Thank you very much!!

[jimsch]

After sleeping on things, if you are running IPv6 it is possible that you have privacy mode where an automatic address change is done every so often.

[bmachuletz]

I have checked the Firmware of my tradfri Gateway (it is currently 1.2.42). It says "newest version". The code i've written is near by your example. <- and it already works :)
To be sure there is no link failure, I have connected the gateway and my Raspberry to an other ethernet switch. IPv6 is disabled.
I'll report my results tomorrow evening.

[jimsch]

I don't know if you can, but putting a wireshark monitor on the same subnet as the gateway would probably give good information as well

[bmachuletz]

this is a good idea. Imho, the the best way to get this specific traffic is to install a transparent bridge between the Raspberry and the ethernet switch. This gives the opportunity to wireshark on the bridge interface. An other option is to monitor the swich ports itself, but I do not have such infrastructure at home.
In other words, if I am not getting further with my problem, I'll looking forward to sniff the traffic and see whats really going on... :)

[bmachuletz]

One shot, one hit... my application is now running for about 20 hours on the new ethernet switch. and voila... it seems to work. I'll report if it passes the next days too.

[dominicusmento]

@bmachuletz I'm looking to do the same thing. Sort of a .net library which would communicate with TradFri gateway. I have a problem with dtls - I haven't found any example of how the package request should look. Can you help with the handshake, how to send the sn and secret to the gateway in coap request?

[bmachuletz]

This is my code fort he connect: public TradfriClient() { keepAliveTimer = new System.Timers.Timer(60000); keepAliveTimer.Elapsed += KeepAliveTimer_Elapsed; keepAliveTimer.Start(); try { userKey = new OneKey(); DeviceList = new List<TradfriDevice>(); userKey.Add(CoseKeyKeys.KeyType, GeneralValues.KeyType_Octet); userKey.Add(CoseKeyParameterKeys.Octet_k, CBORObject.FromObject(Encoding.UTF8.GetBytes("XRgp1htdDiVkBQCV"))); // userKey.Add(CoseKeyKeys.KeyIdentifier, CBORObject.FromObject(Encoding.UTF8.GetBytes("HomeMagic"))); // userKey.Add(CoseKeyKeys.KeyIdentifier, CBORObject.FromObject(Encoding.UTF8.GetBytes("user name"))); ep = new DTLSClientEndPoint(userKey); client = new CoapClient(new Uri("coaps://GW-DCEFCAB82B4F")) { EndPoint = ep }; ep.Start(); IEnumerable<WebLink> resources = client.Discover(); foreach (var resource in resources) { foreach (string s in HomeMagic.Shared.StringHelper.GetMatches(resource.ToString(), "<", ">")) { client.UriPath = s; Response response = client.Get(); Console.WriteLine(response.PayloadString); try { TradfriDevice dev = Newtonsoft.Json.JsonConvert.DeserializeObject<TradfriDevice>(response.PayloadString); if (dev != null) { if (dev.Id >= 65537 && dev.TradfriDeviceName != "TRADFRI group" && dev.TradfriDeviceName != "RELAX" && dev.TradfriDeviceName != "FOCUS" && dev.TradfriDeviceName != "EVERYDAY") { dev.Path = s; DeviceList.Add(dev); } } } catch (Exception ex) { Console.WriteLine(ex.Message.ToString()); // nothing } } } // ep.Stop(); } catch (Exception ex) { Console.WriteLine(ex.Message.ToString()); } } And this is how I am sending requests tot he gateway: private void SwitchOnDevice(TradfriDevice dev) { BesureEndpointIsConnected(); Console.WriteLine("Versuche das Gerät einzuschalten."); if (dev.IsTradfriGroup == true) { foreach (long currentId in dev.GroupDefinition.DeviceList.DevicesIds) { var tradfriDevice = (from d in DeviceList where d.Id == currentId select d).SingleOrDefault(); SwitchOnDevice(tradfriDevice); } } else { client.UriPath = dev.Path; client.Put(@"{ ""3311"":[{ ""5850"":1}]}"); } // ep.Stop(); } hope this helps a bit.. Greetz, Benjamin Von: tomidix [mailto:notifications@github.com] Gesendet: Samstag, 25. November 2017 16:12 An: Com-AugustCellars/CoAP-CSharp <CoAP-CSharp@noreply.github.com> Cc: bmachuletz <bmachuletz@mnetworx.de>; Mention <mention@noreply.github.com> Betreff: Re: [Com-AugustCellars/CoAP-CSharp] Ikea Tradfri - Client Put is not working after a period of time (#43) @bmachuletz <https://github.com/bmachuletz> I'm looking to do the same thing. Sort of a .net library which would communicate with TradFri gateway. I have a problem with dtls - I haven't found any example of how the package request should look. Can you help with the handshake, how to send the sn and secret to the gateway in coap request? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#43 (comment)> , or mute the thread <https://github.com/notifications/unsubscribe-auth/Af2Myb-qC1hMa_DscEgTi1S6EcCAGgvBks5s6C5YgaJpZM4QnSoC> . <https://github.com/notifications/beacon/Af2MyZ0CCbRch_mV6hRAtiU2-OIKmemrks5s6C5YgaJpZM4QnSoC.gif>

[davidwallis]

@bmachuletz I have copied your code and finally managed to get some info back.. could you share your Tradfri device class, as I am unsure how you are using json serialiser to get the data ?

Thanks

David

[dominicusmento]

@bmachuletz First of all I want to thank you. I managed to connect successfully to tradfri gateway using your sample code. @davidwallis3101 you can use these python classes to get an idea about whats happening in the background - https://github.com/ggravlingen/pytradfri/tree/master/pytradfri
I also think that it would be beneficial if we share the code and make it open source, like the python library. Nobody will lose, only the code can get better and have more features if the author could share so anyone can contribute. This way it puts us to the same position loosing the hours on something whats already written. I'd put my code but I'm at the same position as @davidwallis3101 . Still tracing and getting into this. If you are not into pushing the code to open source, I'll push mine as soon as I'll have something whats working anything useful.

[davidwallis]

I'm happy to share the repo I have - I am trying to make this a class library dll that I can then consume in the home automation system that I am using (also in c#)

[bmachuletz]

Hi David, i have generated this class with json2csharp.com. Hope it helps… I’ll share my code on github after some houskeeping 😊 using System; using System.Collections.Generic; using Newtonsoft.Json; using HomeMagic.Shared; namespace HomeMagic.Tradfri { public partial class TradfriDevice : Device { public bool IsTradfriGroup = false; private GroupDefinition internalGroupDefinition; public string Path { get; set; } [JsonProperty("9001")] public string TradfriDeviceName { get; set; } [JsonProperty("3311")] public TradfriLamp[] TradfriLamp { get; set; } [JsonProperty("3")] public DeviceInformation Information { get; set; } [JsonProperty("5750")] public long Unknown5750 { get; set; } [JsonProperty("9003")] public long Id { get; set; } [JsonProperty("9020")] public long Lastseen { get; set; } [JsonProperty("9002")] public long CreatedAt { get; set; } [JsonProperty("9019")] public long ReachableState { get; set; } [JsonProperty("9054")] public long OtaUpdatState { get; set; } [JsonProperty("9018")] public GroupDefinition GroupDefinition { get { return internalGroupDefinition; } set { IsTradfriGroup = true; internalGroupDefinition = value; } } } public partial class TradfriLamp { [JsonProperty("5851")] public long Brightness { get; set; } [JsonProperty("5850")] public long State { get; set; } [JsonProperty("9003")] public long Id { get; set; } } public partial class DeviceInformation { [JsonProperty("1")] public string Type { get; set; } [JsonProperty("3")] public string Version { get; set; } [JsonProperty("0")] public string Vendor { get; set; } [JsonProperty("2")] public string Unknown2 { get; set; } [JsonProperty("6")] public long Unknown6 { get; set; } } public partial class GroupDefinition { [JsonProperty("15002")] public DeviceList DeviceList { get; set; } } public partial class DeviceList { [JsonProperty("9003")] public List<long> DevicesIds { get; set; } } public partial class TradfriDevice { public static TradfriDevice FromJson(string json) { return JsonConvert.DeserializeObject<TradfriDevice>(json, Converter.Settings); } } public static class Serialize { public static string ToJson(this TradfriDevice self) { return JsonConvert.SerializeObject(self, Converter.Settings); } } public class Converter { public static readonly JsonSerializerSettings Settings = new JsonSerializerSettings { MetadataPropertyHandling = MetadataPropertyHandling.Ignore, DateParseHandling = DateParseHandling.None, }; } // public TradfriDevice() // { // } } Greetz, Benjamin Von: David Wallis [mailto:notifications@github.com] Gesendet: Montag, 27. November 2017 22:56 An: Com-AugustCellars/CoAP-CSharp <CoAP-CSharp@noreply.github.com> Cc: bmachuletz <bmachuletz@mnetworx.de>; Mention <mention@noreply.github.com> Betreff: Re: [Com-AugustCellars/CoAP-CSharp] Ikea Tradfri - Client Put is not working after a period of time (#43) @bmachuletz <https://github.com/bmachuletz> I have copied your code and finally managed to get some info back.. could you share your Tradfri device class, as I am unsure how you are using json serialiser to get the data ? Thanks David — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#43 (comment)> , or mute the thread <https://github.com/notifications/unsubscribe-auth/Af2MyfwB_HRcTmDh7oeM3c6qtvUhDL4pks5s6y_-gaJpZM4QnSoC> . <https://github.com/notifications/beacon/Af2MyWUIR4ry_20Vh34Xf2Z-7aL6tsKyks5s6y_-gaJpZM4QnSoC.gif>

[bmachuletz]

I am also happy to share code with you. As soon my code is ready to go public I will share it on github. Did anyone get the subscription to the events working so far? Greetz, Benjamin Outlook for Android herunterladen On Tue, Nov 28, 2017 at 10:55 AM +0100, "David Wallis" <notifications@github.com> wrote: I'm happy to share the repo I have - I am trying to make this a class library dll that I can then consume in the home automation system that I am using (also in c#) — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or mute the thread.

[dominicusmento]

@bmachuletz
I'm refactoring my testing code right now so it can be used as some kind of backbone / library. It's not perfect but I'm looking to have a nice architecture so it can be built up on it as a nice library. Did not get deep into the features because I'm sure you are already some steps ahead.
I also abandoned the idea of using .net core (which would be beneficial as it works on all platforms - mac/linux/win) because I had some problems running the Coap libraries on it. Right now my projects are on .net 4.7.1

P.S. I also used json2csharp although the visual studio has the same possibility, LOL