Implement Zigbee in Arduino

[P-R-O-C-H-Y]

Related area

Create an API for Zigbee within Arduino

Hardware specification

ESP32-C6 and ESP32-H2 as Standalone Nodes. Other SoC can be used as radio co-processor attached to a RPC (802.15.4 radio layer).

Is your feature request related to a problem?

This is an issue to track the progress of developing Zigbee library, a new API for Arduino.

Describe the solution you'd like

Initial tasks:

• Add zigbee-sdk to Arduino lib-builder Copy Zigbee + Zboss libraries esp32-arduino-lib-builder#146
• Add zigbee support Zigbee protocol support #8844
• Port basic IDF examples to Arduino Add Zigbee examples #9024 Zigbee examples update #9627

Zigbee library (wrapper) tasks:

• Create Zigbee classes and implement all Zigbee roles
• Implement Zigbee network scanning
• Allow multiple endpoints on same Zigbee device (test needed)
• Implement basic HA devices (lights, switches, sensors, etc..)
  • On/off light + switch
  • Color Dimmable light + switch
  • Temperature sensor + Thermostat
• Implement setting Manufacturer and model name
• Update ported examples to use the Zigbee Library
• Documentation (will be handled in separate PR)

PR: #10265

Good to have features:

• Zigbee identify handling (user can for example blink LED of EP) -> comment
• Zigbee sleepy device / deep sleep-lightsleep Zigbee Implementation: Deep Sleep example #10405
• Power source/battery level info feat(Zigbee): Support for sleepy device + Power Source and battery level + Humidity sensor cluster #10551

more tasks will be added while in progress.
Development branch

Describe alternatives you've considered

No other usable Zigbee wrapper around.

Additional context

Related issues:
#8807 #9156 #9962 #9480

I have checked existing list of Feature requests and the Contribution Guide

• I confirm I have checked existing list of Feature requests and Contribution Guide.

[elgerg]

Hi, love the work so far. I'm so excited to get this running. It looks like it's going to be the next best thing since sliced bread!

Are there any intentions to add power source/battery level into the config?

If mains powered could it act as a router as well or is that too much for a H2? Maybe ok for the C6..

Many thanks and appreciate the hard work!

[P-R-O-C-H-Y]

Dev update 12/08/2024 pushed to the dev branch:

• Implemented Factory reset of Zigbee device, in order to connect to new network without reflashing/erasing flash
• Implemented optional setting for Manufacturer and Model names
• Added option to allow endpoint to have multiple endpoint connected -> switch - 2 lights (tested)
• Implemented easy transfer from device it to Device type (0x0000 = ESP_ZB_HA_ON_OFF_SWITCH_DEVICE_ID -> "General On/Off switch".
• Minor sketches update

[elgerg]

Oh wow, that looks amazing! So easy, I'm going to love this. Thanks!

[P-R-O-C-H-Y]

Hi, love the work so far. I'm so excited to get this running. It looks like it's going to be the next best thing since sliced bread!

Are there any intentions to add power source/battery level into the config?

If mains powered could it act as a router as well or is that too much for a H2? Maybe ok for the C6..

Many thanks and appreciate the hard work!

Thank you for your feedback 👍 I really appreciate it.

About the power source/baterry level I will add it on the list as good to have, so I will look after having the main part done :)

[P-R-O-C-H-Y]

Dev Update 14/08/2024 pushed to dev branch:

• Implemented Color Dimmable Light and Colour Dimmer Switch endpoints, working in RGB colour space (automatically convert to/from XYZ).
• Added examples: Zigbee_Color_Dimmable_Light, Zigbee_Color_Dimmer_Switch
• Printing of bound devices (endpoints)
• Minor code updates

[elgerg]

Nice,
Any chance you can take a look at adding temp sensor and light sensor?
They are the 2 I'm most eager to try, I'm currently using the temp sensor and it works great (even if the code is way difficult to understand).
Thanks!

[P-R-O-C-H-Y]

Nice, Any chance you can take a look at adding temp sensor and light sensor? They are the 2 I'm most eager to try, I'm currently using the temp sensor and it works great (even if the code is way difficult to understand). Thanks!

@elgerg The temperature sensor + thermostat are on the list of upcoming tasks.
The light sensor device type is not present in the list in esp32-zigbee-sdk, it should have value 0x106, which is not present.
Can you open a feature request to the esp-zigbee-sdk repository please? Seems that the main part is already there which contains all the clusters and attributes for luminance sensor.

Edit: found your issue you opened. Added a comment.

[elgerg]

Thanks for adding to espressif/esp-zigbee-sdk#401
I'm quite excited about being able to create my own Temp/Lumin Zigbee sensors :D
Thanks for the continued effort!

[elgerg]

Hi @P-R-O-C-H-Y

Any chance I can add this to the "Nice to have" list?

In the current Temp sensor version there is an identify cluster (?) added:

    esp_zb_cluster_list_add_identify_cluster(cluster_list, esp_zb_identify_cluster_create(&(temperature_sensor->identify_cfg)), ESP_ZB_ZCL_CLUSTER_SERVER_ROLE)

Any chance you can add something like that to the list so we can blink an LED when triggered? No idea how to do that at the moment..

Thanks!

[P-R-O-C-H-Y]

Hi @P-R-O-C-H-Y

Any chance I can add this to the "Nice to have" list?

In the current Temp sensor version there is an identify cluster (?) added:

    esp_zb_cluster_list_add_identify_cluster(cluster_list, esp_zb_identify_cluster_create(&(temperature_sensor->identify_cfg)), ESP_ZB_ZCL_CLUSTER_SERVER_ROLE)

Any chance you can add something like that to the list so we can blink an LED when triggered? No idea how to do that at the moment..

Thanks!

Hi @elgerg,

Can you explain a bit more? I am not sure if I got it correctly.
What would be "Nice to have"? Option to customise identify cluster? I don't also get the LED blink.

[elgerg]

Hi @P-R-O-C-H-Y
I should have been more specific.

If you have a look at this:

There is an identify button. In theory this should allow for the device to identify itself by blinking an LED or something when the button is pressed so you can figure out which device is which.

This article explains really well on what identify is:
https://medium.com/@omaslyuchenko/hello-zigbee-part-22-identify-cluster-90cf12680306

So what would be good to have is a simple way of using this just like you are doing with the rest of the wrapper.

Does that make a little more sense?

Thanks

[P-R-O-C-H-Y]

Hi @P-R-O-C-H-Y I should have been more specific.

If you have a look at this:

There is an identify button. In theory this should allow for the device to identify itself by blinking an LED or something when the button is pressed so you can figure out which device is which.

This article explains really well on what identify is: https://medium.com/@omaslyuchenko/hello-zigbee-part-22-identify-cluster-90cf12680306

So what would be good to have is a simple way of using this just like you are doing with the rest of the wrapper.

Does that make a little more sense?

Thanks

Thanks for explaining. That can be really helpful. Adding it to the list :)

[elgerg]

Excellent. Thanks :)

[P-R-O-C-H-Y]

Dev Update 16/08/2024 pushed to dev branch:

• Implemented Zigbee network scanning (mostly match WiFi scan API)
• Added Zigbee_Network_Scan example

[elgerg]

If you're taking requests I'd also like to implement some kind of way of getting the current time from the coordinator to display on a screen. Do you know if it's possible to get the time into some sort of callback?

Thanks :)

[P-R-O-C-H-Y]

If you're taking requests I'd also like to implement some kind of way of getting the current time from the coordinator to display on a screen. Do you know if it's possible to get the time into some sort of callback?

Thanks :)

@elgerg Do you have any example of this feature?

[P-R-O-C-H-Y]

Dev Update 28/08/2024 pushed to dev branch:

• Implemented Temperature sensor and Thermostat endpoints.
• Added examples: Zigbee_Temperature_Sensor, Zigbee_Thermostat
• Implemented configure report handler.
• Updated READMEs and description of examples.
• Minor code updates

[P-R-O-C-H-Y]

Thanks for the great work done here. As this whole feature is not jet finished, I'm hesitating to create a new issue. If this here is not the right spot, please give me a hint, where I should put it.

I succesfully used the example for the Switch and the on/off light with the given "light" example on a second seeed xiao esp32-c6 and with an ikea power outlet.

I tried to expand the example, because I don't want to bind a power outlet manually after every reset. I already found a similar ticket for the espressif SDK., that tells me, that this is already possible.

I changed the example to not wait in the setup() for a bound device. But then: nothing happens, because _is_bound = false in the follow up routings. If I bind the first light again, the whole switch starts working and also the formerly bound power outlet is switching as expected. (= the newly bound light and the power outlet are switching together)

Therefore, I assume, that during initialization the state of _is_bound is not correctly read from the memory, right? I'm was looking at

arduino-esp32/libraries/Zigbee/src/ZigbeeEP.cpp

Line 13 in e99f1fd

//TODO: is_bound and allow_multiple_binding to make not static

but at this point my knowdlege comes to an end. ...
Thanks for any hints how to solve this, or if this already known and planned. Or where I should open a individual ticket.

Hi @AndunHH, thank you for your feedback. I will take a look on this issue with the _is_bound if I can see anything wrong there. The TODO comment is there for me, as I might transfer all those variables to not be a static if possible.
If you have more info about that issue you have also with an example and steps how to reproduce it, please open a new issue and describe everything there. It will help a lot to have it separated, so we can discuss it there :)

[P-R-O-C-H-Y]

@P-R-O-C-H-Y have you thought about maybe splitting Zigbee API for Arduino to make one part hardware-agnostic?

That is, breakout the Zigbee API from arduino-esp32 into its own separate library makes that hardware independent so that it could be reused by other projects with other Zigbee radio libraries, especially if they too have based their Zigbee stack on ZBOSS, such as example Nordic Semiconductor. With the point being that such a library would attract more Arduino developers that are interested in this Zigbee API but might want to instead make an implementation for a non-ESP32 based radio.

Hi @Hedda, I was not thinking about that as I use the ESP-ZIGBEE-SDK underneath, which uses the ZBOSS. The main idea of Arduino APIs is to offer a similar approach to other Arduino interfaces. If users want to use ESP-IDF Zigbee APIs, that is still possible, they can just ignore the Arduino Zigbee APIs. This is valid for most of our Arduino APIs, actually, users can always use the ESP-IDF underneath. We don't have a goal of portability of our libraries, only to keep portability of user applications. But for sure other manufacturers can follow the same APIs, but the Implementation will depend on them.

[HexiDev]

@P-R-O-C-H-Y Hi! I'm not sure. But is there already a wrapper so you can communicate from device to device e.g. a button that toggles another zigbee light without using automations like homeassistant and/or nodered

[P-R-O-C-H-Y]

@P-R-O-C-H-Y Hi! I'm not sure. But is there already a wrapper so you can communicate from device to device e.g. a button that toggles another zigbee light without using automations like homeassistant and/or nodered

Hi @HexiDev, just flash one ESP with on/off light and second ESP with on/off switch examples. The switch will act as a coordinator and create the Zigbee network, light will join the network and bind to the switch. So clicking a button on switch will turn on/off the light :)
So no need for any HomeAssistant or any system handling the network.

[HexiDev]

But would it be also possible to use an existing network and make 2 zigbee end/router devices talk to eachother? Like in a sense that I can setup a switch as a router that can turn on/off my light that is also a router.

instead of communicating coordinator > end/router device

[Hedda]

@HexiDev I believe taht the Zigbee feature that you are requesting is called ”Zigbee Binding”, and you normally ”bind” two compatible cluster attributes.

Binding is an on-device feature for Zigbee devices. It provides a mechanism for attaching an endpoint of one Zigbee device to an endpoint of another Zigbee device or to a Zigbee group.

For example, binding a “target destination” Zigbee device like a remote to a Zigbee light bulb, switch or group of light bulbs allows direct control of the “target” device (light, switch, shade) from the “remote” Zigbee device, bypassing the Zigbee Gateway. This means that the remote can control the light bulb or group even when any Zigbee Coordinator and Zigbee Gateway is not active.

Note that not all devices support binding. By default, most any Zigbee Gateway applications binds remotes to the coordinator, so click events are still forwarded to the Zigbee Gateway application for state reporting.

Note that as some remotes can only be bound to a single destination, you might need to unbind the remote from the coordinator before binding it to another device or group.

See how bindings is used in other software:

• https://github.com/martelmy/Zigbee-examples-nRF5-SDK/blob/main/bind_req_cmd/

• https://www.home-assistant.io/integrations/zha#zigbee-binding-and-unbinding

• https://www.zigbee2mqtt.io/guide/usage/binding.html

• https://www.openhab.org/addons/bindings/zigbee/

[patrickfnielsen]

Examples/support for illuminance would be nice, or maybe an example for how support could be implemented if you know the clusters/endpoints/attributes needed.

[lsroka76]

Does anybody successfully compiled Zigbee Gateway example in Arduino. Especially ot_rcp part?

[Farisabdurrasid]

@P-R-O-C-H-Y hi, can you help me?, I'm not sure if there is a way to configure esp32c6 as an end device and esp32H2 as a coordinator so they can connect to each other by sending messages via serial monitor. Is it possible and may I know where I can get the code?

[P-R-O-C-H-Y]

@P-R-O-C-H-Y hi, can you help me?, I'm not sure if there is a way to configure esp32c6 as an end device and esp32H2 as a coordinator so they can connect to each other by sending messages via serial monitor. Is it possible and may I know where I can get the code?

Hi @Farisabdurrasid. To get this correctly, you want to use Zigbee protocol to send a messages between 2 devices (coordinator <-> end device) via serial monitor? Idk if this is the purpose of the Zigbee library and overall the Zigbee HA devices. What kind of messages it should be? Or can you explain it more deeply? Thanks

[Farisabdurrasid]

@P-R-O-C-H-Y hi, can you help me?, I'm not sure if there is a way to configure esp32c6 as an end device and esp32H2 as a coordinator so they can connect to each other by sending messages via serial monitor. Is it possible and may I know where I can get the code?

Hi @Farisabdurrasid. To get this correctly, you want to use Zigbee protocol to send a messages between 2 devices (coordinator <-> end device) via serial monitor? Idk if this is the purpose of the Zigbee library and overall the Zigbee HA devices. What kind of messages it should be? Or can you explain it more deeply? Thanks

@P-R-O-C-H-Y yes like that, without having to use Home Assistant, so these 2 ESP32C6 devices communicate with each other using zigbee.

For the project I am planning to create, the ESP32-C6 (coordinator) will act as the MCU for the soil moisture sensor. When the soil moisture level reaches a set point, another ESP32-C6 (end device) will act as the MCU to change the traffic light's color. The data from the coordinator will be sent to the end device using Zigbee communication. can it?

[teambvd]

For the project I am planning to create, the ESP32-C6 (coordinator) will act as the MCU for the soil moisture sensor. When the soil moisture level reaches a set point, another ESP32-C6 (end device) will act as the MCU to change the traffic light's color. The data from the coordinator will be sent to the end device using Zigbee communication. can it?

Sounds like what you're looking for is something more like ESP-NOW. Any to any comms isn't really what ZigBee does, and trying to do it by working within the ZigBee protocol is just going to unnecessarily complicate implementing what you're looking for IMO.

[Farisabdurrasid]

Yes, it makes sense. Thanks for the knowledge Pada tanggal Kam, 23 Jan 2025 23.42, teambvd ***@***.***> menulis:

…

For the project I am planning to create, the ESP32-C6 (coordinator) will act as the MCU for the soil moisture sensor. When the soil moisture level reaches a set point, another ESP32-C6 (end device) will act as the MCU to change the traffic light's color. The data from the coordinator will be sent to the end device using Zigbee communication. can it? Sounds like what you're looking for is something more like ESP-NOW. Any to any comms isn't really what ZigBee does, and trying to do it by working within the ZigBee protocol is just going to unnecessarily complicate implementing what you're looking for IMO. — Reply to this email directly, view it on GitHub <#10135 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BHCN3YH6U5JWKS6TF42LEGT2MELX5AVCNFSM6AAAAABMIX4LBKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMMJQGM3TMOBRGY> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[MegaJack22]

Hey P-R-O-C-H-Y,
First off, I just wanted to say a huge thanks for everything you’ve done for the community. Your work on this project is absolutely amazing, and it’s clear how much effort and time you’ve put into it. It’s inspiring to see someone so dedicated to making things better for everyone else. Your contributions have helped so many people, including me, to build some really cool stuff.
Now, I had a quick question for you. Do you think it would be possible to implement Zigbee OTA updates through systems like Z2M or similar platforms? This could add even more flexibility to projects built using your library, allowing remote firmware updates without needing physical access to devices. What are your thoughts on that?
Thanks again for all your hard work—it truly makes a difference!

[P-R-O-C-H-Y]

Hi @MegaJack22, Thank you for nice words.
The support of OTA cluster is now in progress and may be added soon :)

[P-R-O-C-H-Y]

Hi everyone, can you please try #10946 if the OTA works for you? Thanks

[quentains]

Wow. I bought an ESP32-H2 8 months ago to try out to build Zigbee sensors. I had to deal with the ESP-IDF documentation for several days before finally giving up. Now I'm back to the news and discovering this new arduino library. Thank you very much for your great work. It will clearly help the most beginners among us to get started! Has the PR about documentation already been created?

[P-R-O-C-H-Y]

Hi @quentains, the documentation is unfortunately not ready yet. I have a quick draft, but as I am still working on adding new stuff, this is on lower priority now. Most of the functionality is demonstrated in the examples, so you can for now take a look at them :)

[jaccobezemer]

As others I also got stuck on using the ESP-IDF platform.
Thanks P-R-O-C-H-Y for giving us this Arduino library. I finally managed to create a Dimmable Light that integrates with Home Assistant ZHA.
However, I what to integrate it in Philips Hue.
I managed to change the trust center key but had to do this in the library. It would be nice if this would become possible in the API wrapper.

And while I managed to get the commissioning process with the Philips Hue bridge starting, my light does not show up in the Hue (no light found).
If someone managed to get this working with de Arduino Wrapper I'd love to hear about it.

[P-R-O-C-H-Y]

Hi @jaccobezemer, can you please give me more info on what exactly you needed to change, so I can add an API for that? If you prefer we can discuss it on our Discord channel.

[jaccobezemer]

Hi @jaccobezemer, can you please give me more info on what exactly you needed to change, so I can add an API for that? If you prefer we can discuss it on our Discord channel.

In ZigbeeCore.cpp I've added the following code below Initialize Zigbee stack:

// Initialize Zigbee stack
  log_d("Initialize Zigbee stack");
  esp_zb_init(zb_cfg);

  // allow joining the Philips Hue network(s)
  esp_zb_enable_joining_to_distributed(true);
  uint8_t secret_zll_trust_center_key[] = {
    // The Philips HUE Trust Center Key
    0x81, 0x42, 0x86, 0x86, 0x5D, 0xC1, 0xC8, 0xB2, 0xC8, 0xCB, 0xC5, 0x2E, 0x5D, 0x65, 0xD1, 0xB8
  };
  esp_zb_secur_TC_standard_distributed_key_set(secret_zll_trust_center_key);

Maybe the above is possible with a public set method like .hueCompatible(true) or .setAlternateTCkey();

Below is the log showing the commissioning process with the Hue bridge. Unfortunately the light doesn't show up in the bridge.

.......ZBOSS: nwk/nwk_join.c:186   low lqi 20
ZBOSS: nwk/nwk_join.c:186   low lqi 0
ZBOSS: nwk/nwk_join.c:186   low lqi 0
ZBOSS: nwk/nwk_join.c:186   low lqi 0
ZBOSS: nwk/nwk_join.c:186   low lqi 0
ZBOSS: nwk/nwk_join.c:186   low lqi 0
ZBOSS: nwk/nwk_join.c:293   Will assoc to pan 0xe3e9 on channel 25, dev 0xea86, iface_id 0
.....ZBOSS: mac/mac_associate.c:448   received association response
ZBOSS: zdo/zdo_app_join.c:771   CONGRATULATIONS! joined status 0, addr 0x1d8e, iface_id 0, ch 25, rejoin 0
ZBOSS: zdo/zdo_app_join.c:773   xpanid b7:26:42:b2:99:b4:00:3e
ZBOSS: secur/zdo_secur.c:211   NWK key 5f:aa:6c:d2:66:4b:6a:a7:20:91:92:45:82:bc:78:7e
ZBOSS: commissioning/bdb/zdo_commissioning_bdb.c:549   COMMISSIONING_STOP: app signal 10 comm status 0

Here's some additional information and credits:
https://wejn.org/2025/01/zigbee-hue-llo-world
espressif/esp-zigbee-sdk#358

[jaccobezemer]

Hi P-R-O-C-H-Y,

This example works https://github.com/wejn/esp32-huello-world/tree/efb210dc42a2b8a11f1d66c69ec135010910055e

In that example setting the distributed key is just after esp_zb_init(zb_cfg);

When setting the distributed key in your wrapper also after esp_zb_init, then it is responding when the Hue bridge is open for joining but it isn't found by the bridge. On the other hand it is still able to join my HomeAssistant ZHA network.

So I suspect, in your wrapper, setting the distributed key should be done somewhere else in the code.

Do you have a tip?

[jaccobezemer]

Finally 🤗 I manged to get things working in combination with Philips Hue. This blog post from wejn did the trick. (https://wejn.org/2025/01/zigbee-hue-llo-world).

These are the changes I've made to the dimmable light example. By the way, with these changes the light works with Philips Hue and Home Assistant ZHA.

Changes to ZigbeeCore.cpp

After esp_zb_init(zb_cfg); add the following code

  // allow joining the Philips Hue network(s)
  esp_zb_enable_joining_to_distributed(true);
  uint8_t secret_zll_trust_center_key[] = {
      0x81, 0x42, 0x86, 0x86, 0x5D, 0xC1, 0xC8, 0xB2, 0xC8, 0xCB, 0xC5, 0x2E, 0x5D, 0x65, 0xD1, 0xB8
  };
  esp_zb_secur_TC_standard_distributed_key_set(secret_zll_trust_center_key);

Changes to ZigbeeDimmableLight.cpp

Line 13: change app_device_version = 0 to 1
_ep_config = {.endpoint = _endpoint, .app_profile_id = ESP_ZB_AF_HA_PROFILE_ID, .app_device_id = ESP_ZB_HA_DIMMABLE_LIGHT_DEVICE_ID, .app_device_version = 1};

The light can now be added to the Philips Hue Bridge 👍

Now we need to correct the off behavior of the Hue Bridge.

Add the following code after _cluster_list = zigbee_dimmable_light_clusters_create(&light_cfg); in
ZigbeeDimmableLight::ZigbeeDimmableLight(uint8_t endpoint) : ZigbeeEP(endpoint)

  // correct the off behavior  
  // https://github.com/espressif/esp-zigbee-sdk/issues/457#issuecomment-2426128314
  uint16_t on_off_on_time = 0;
  bool on_off_global_scene_control = 0;
  esp_zb_attribute_list_t *onoff_attr_list = esp_zb_cluster_list_get_cluster(_cluster_list, ESP_ZB_ZCL_CLUSTER_ID_ON_OFF, ESP_ZB_ZCL_CLUSTER_SERVER_ROLE);
  esp_zb_on_off_cluster_add_attr(onoff_attr_list, ESP_ZB_ZCL_ATTR_ON_OFF_ON_TIME, &on_off_on_time);
  esp_zb_on_off_cluster_add_attr(onoff_attr_list, ESP_ZB_ZCL_ATTR_ON_OFF_GLOBAL_SCENE_CONTROL,&on_off_global_scene_control);

Of course these changes should also be made to the on/off light and the dimmable color light.

[P-R-O-C-H-Y]

Thank @jaccobezemer for nice investigation and description :)
Would you like to add those changes yourself in a PR or should I handle it? :)

[jaccobezemer]

Hi P-R-O-C-H-Y,
I'm willing to make the changes myself but I'm a hobbyist and never did a PR. So I don't know what the do's and don'ts are.

That said, I think that with these change the API is not yet compatible enough with Philips HUE. I've noticed that overnight my light is off while the Hue bridge still thinks it on (and it should be on).
Also when the light level is changed at the end device the bridge is not updated.
With ZHA this works oké.
So, compatibility with the Hue bridge still needs more work.

[P-R-O-C-H-Y]

Hi P-R-O-C-H-Y, I'm willing to make the changes myself but I'm a hobbyist and never did a PR. So I don't know what the do's and don'ts are.

That said, I think that with these change the API is not yet compatible enough with Philips HUE. I've noticed that overnight my light is off while the Hue bridge still thinks it on (and it should be on). Also when the light level is changed at the end device the bridge is not updated. With ZHA this works oké. So, compatibility with the Hue bridge still needs more work.

Hi @jaccobezemer, thank you for your additional feedback.
I can add the API for adding the keys etc. but I don't have the Philips HUE Bridge, so I cannot test anything. And as you said its still not working 100 %, I am not sure if we should add the support before figuring all things to make it work reliably.