FYI: Computing Scene Codes #11
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Very Useful Thank You, for taking the time to document this and explain this. |
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FWIW, it doesn't seem to work reliably for scene codes larger than 0xff, so this isn't 100%, but it does give a way to map from the list of known codes to data you can send to the device. |
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This is awesome, thanks for this documentation! Unsure if you think we should leave this as a open issue (Maybe we pin it) or is it worth adding a file / folder for documentation like this to the repo? I am open to any and all ideas |
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Hi @wez! Yesterday I've got some Govee Floor Lamps Basic on my birthday and wanted to integrate them into my Home Assistant. Unfortunately it didn't work as easy as I expected. These are my first Govee devices. I encountered your name and your posts at different places and obviousley you're the man that knows the most about the propriatary Govee solutions. I integrated the lamps into HA with different addons and I also tried your Govee2MQTT addon which runs quite well, but faces some problems when it comes to setting colors onto single segments. Mainly it works, but since it's using the cloud, the reaction time is very bad, when setting segments 0..7 one by one. I'm a programmer and I quickly setup my own UDP server to check the local LAN API. It was no problem to discover the lamps and setting color and brightness, but no word about setting single segments in the manual. I nearly gave up and then discovered this post and the "ptReal" command. But I didn't get how to discover the payload for this command. You write My intention actually is to use my Govee Floor Lamps not with the predefined scenes, but just some static gradients. I don't like the animations. Maybe for a party, but in my everyday life I just want the lamps to shine in different static gradients. Do you think this will be possible localy without using the Govee app? Will these be anyhow possible with the LAN API? Besides, thank you very much for all your efforts that you are putting in for the community! Best regards |
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Hello @wez ! I have the same question as @loebi-ch about how to calculate the scene code. Are you able to give us a step by step of what you mean when you say: Convert to hex to produce: 0x27cf which you can break into two bytes and swap around, adding on to a scene mode packet then zero-pad out to 19 bytes + checksum. I understand how to convert decimal to hex but get lost when you say to break into two bytes and swap around. I also do not understand the zero-pad out to 19bytes + checksum. I would love to use this for my Govee permanent lights via the LAN API which has very little control to it. Please let me know if you can give further instructions on how to calculate the scene codes. Thanks! Braden |
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@Hauty9 Here are notes I took when I figured this out. Hope it helps. Using the example of the scene "Forest" Scene = Forest At the step "Hex command", you take the offset (0002), break it into 2 parts (00) and (02), then switch them around (0200). I think that is the part you are stuck at. Calculate the XORChecksum of "Hex Command" here: Calculate the base64 of the hex "Combined_No_Space" here: https://base64.guru/converter/encode/hex |
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@AlgoClaw Thanks for the explanation, however I think I'm still a bit lost on some parts. Where do you get the Hex Scene Prefix from? Does this number change per scene or is it always the same. For the Cloud API, is the number the scene ID or ParamID? I'm pulling the scene information my Govee permanent outdoor lights. My "forest" scene has an id of 10745 and ParamID of 17950 Thank you for your help! |
I have several H61A8, so I can pull the data using: `curl "https://app2.govee.com/appsku/v1/light-effect-libraries?sku=H61A8" -H 'AppVersion: 5.9.20' -s > govee_H61A8.json' or, if you want to filter for just the "sceneName" and "sceneId", use: 'curl "https://app2.govee.com/appsku/v1/light-effect-libraries?sku=H61A8" -H 'AppVersion: 5.9.20' -s | jq '[.data.categories[].scenes[] | {name: .sceneName, sceneId: .sceneId}]' > govee_H61A8_scenes.json' For the H61A8, the "Forest" scene has "sceneId" 130, and dozens of different "scenceParamId". I think sceneId is the critical one. If I remember correctly, the scene codes only translated properly a few times. If you figure that part out, please post here to let me (and everyone else) know. I was keeping track of my H61A8 stuff here (https://docs.google.com/spreadsheets/d/1FokCgrgi34qqEEiy1-_AeeroNMDFz-83XSapXxNVXFI/edit?usp=sharing), but I got bored and moved on after a while. Post the model number of your lights and I can pull the data for it and see if I can help. |
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Thank you for all the explanations! I used postman to pull the information about the scenes from Govee. I did: That returned all the scene information for my lights. For mine, the "forest" scene returns like this: However, Any of my DIY Scenes come back with a a 8 number value and not an ID or paramId. I have the Permanent Outdoor Elite series. H805A Do all your scenes only have a 3 number value? Thanks! |
Most have 3 digits, but not all. A dozen-or-so have 4 and 5 digits. For example, the newly added "Thanksgiving" has sceneId 15332. Other examples "Dreamlike":7610 "Undersea King":8400 "ARRAKIS":10067.
How are you getting info for DIY scenes? The public API should not have anything specific to your setup. Also note, "DIY" scenes may have a different prefix. We are nearing the end of my knowledge about this stuff. Most of what I know is from reading @wez 's comments and posts on the subject and then a little trial-and-error from trying to do it myself. At this point, you are probably just going to have to go through each number individually to see what the output is. For H61A8, only "Sunrise", "Sunset", and "Forest" worked as expected. The 100+ I tried after did not line up. Govee is not making it easy. The "WLAN Guide" they released provides only top-level generic information (https://app-h5.govee.com/user-manual/wlan-guide). However, I was playing in the app last night and found some additional stuff that might bring insight. It seems "Razer Chroma" is now able to control Govee lights through LAN communication. If you go to -- Govee app > "Home" tab > human silhouette in bottom-right > "Local Services" -- it will open a "User Guide" for how to interact with Razer Chroma. It also certainly uses LAN connections, as the guide specifies that the "LAN Control" option must be enabled for each device and Razer Chroma must be running on the same network. I have no idea what Razer Chroma is, but this may provide a much easier way to interact. |
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This is all very interesting. I use Postman to pull all the scenes from the API. The POST command looks like this: https://openapi.api.govee.com/router/api/v1/device/scenes In the body of my POST command is: That POST request will return all the scene information. My Thanksgiving scene outputs like this: "name": "Thanksgiving", For my DIY scenes I use the same POST as above but I replace "scenes" with diy-scenes" and I get a list of all my DIY scenes that are associated with that device. I got all my information on how to get the scene information from this link: https://developer.govee.com/reference/get-light-scene How are you pulling information for each scene? I don't much about Razor Chroma but sounds very interesting if it uses local control! |
APIAh, I see you are using Govee's official API with your own API key. Hence, you are able to pull info about your account and your configuration (and your custom made DIY scenes). The info I get is simply by using the no-key-required public API that @wez posts at the very top of this thread. You can pull the info at https://reqbin.com/post-online if you do not have a CLI to work with. For example, you can enter the command:
This specifies the model number "H805A" (as a parameter) and the "AppVersion" "999999" (as a header). If you do not specify an "AppVersion", the return message is simply "service is busy please try again later". So, I tried with an arbitrarily high number "999999". I also tried with "0" to see if the results were different, and they were. So you don't have to do this yourself, I posted the results for 3 models (H61A8, H7039, H805A), with AppVersion 0 and 999999 here https://github.com/AlgoClaw/Govee/tree/main. In the 999999 AppVersion for the H805A (https://github.com/AlgoClaw/Govee/blob/main/H805A_2024-12-04_AppVer999999), the code for "Thanksgiving" is the following (lines 1728-1767): LAN Commands (H61A8)I went back through my attempt to organize the working LAN commands for the H61A8 (https://docs.google.com/spreadsheets/d/1FokCgrgi34qqEEiy1-_AeeroNMDFz-83XSapXxNVXFI). It seems through firmware updates Govee removed nearly all commands that I identified for a scene. Previously, I identified about 45 commands that would start a scene. Now, I can only identify 13. So, even if this was a good to send LAN commands, Govee forces updates that remove them (or change them). Separately, I previously linked the incorrect website to calculate the checksum. The site you want to use is https://www.scadacore.com/tools/programming-calculators/online-checksum-calculator/. This is the only site I can find that gives the correct result. Looking back at the UI I made in NodeRed, I can control power, brightness, and color using LAN commands with the (very) basic info Govee provides in their guide (https://app-h5.govee.com/user-manual/wlan-guide). LAN Commands (Generally)Based on Craig K's (@Mavrrick) comment here https://developer.govee.com/discuss/660c7e59aa38b40025f0cf53, it seems multiple of these commands are required to be sent in a single message in order to initiate a scene. He seems to be much more active in the development and understanding of the LAN commands.
I think the H805A is here (he does not use model numbers): |
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Thank you for all the detailed examples and descriptions! I find it kind of strange that you can pull scene ids with two different APIs. Maybe this is par for the course for other APIs but kind of wish Govee would spell it out more and make a more robust local API. Or if there was a way to pass the scenes to a Matter controller, that would solve alot of issues. I have mine integrated into SmartThings but it only has basic control and I have not found a way to trigger any scenes within SmartThings. I will have to check out some of the links you provided and see how much time I want to put into this if Govee updates kill off some scene IDs. I have it working pretty good right now with the cloud API but I'm a fan of local control and would love to have it all locally done. I do wish the cloud API had the ability to trigger "tap to run" scenes or groups as well. I have two sets of permanent outdoor lights to cover my house that I would love to trigger at the same time via the API but have not found a way to do that. I'm not a fan of sending the same scene to one controller then another controller with a second or two delay. The lights look mildly out of sync depending on the scene. |
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SOLVED? Okay, I think I figured it all out and completely reverse engineered the scene codes. Given just the publicly available API (no key required), you can calculate the required commands to send for any given scene. Here is an explanation of how to do it: https://github.com/AlgoClaw/Govee/blob/main/decoded/explanation Here is a bash script to generate a JSON for any given model: https://github.com/AlgoClaw/Govee/blob/main/decoded/govee_decoded.sh I pre-made jsons for three models. Now, I just need @wez to integrate this into https://github.com/wez/govee2mqtt Let me know if anyone else has success with these. |
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Wow @AlgoClaw, it seems as you've found the holy grail :-) Congratulations for solving the Govee puzzle. |
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@loebi-ch You're preaching to the choir. I spent most of my winter break on this. They could have saved hundreds of hours (between all of us) if they just released the documentation on how to use their devices. I recently bought another TP-Link smart dimmer switch (I have ~40 TP-Link smart devices already). Apparently TP-Link devices now require cloud authentication credentials to control the devices locally. Needless to say, I will be returning the new switch and I blocked Internet access to my existing switches. I spent a few hours looking for good alternatives, but came up short. It seems we are moving backwards when it comes to user ownership and local control. This battle may be won, but the war is not looking good. C'est la vie, we fight on nonetheless. |
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This is amazing. Thank you all for all the work on this! Happy to add/merge any of this documentation into this repo if you think it benefits the community. |
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@egold555 I hereby waive all rights in the linked documents and code. Please copy/modify/reuse whatever you'd like. |
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Nice work!! I appreciate you spending the time to figure this out! I do have a question about how you are sending the commands. I was looking a the Christmas scene for the H805A: "name": "Christmas", What are you sending to the controller from this and how are you sending it? I have yet to get any kind of scene commands to trigger locally. I can get standard on/off from the documented local API to work but keep failing with the local scene control. I can send the lights this command to turn on and it works great: {"msg":{"cmd":"turn","data":{"value":1}}} But when I try a scene commands like this: {"msg":{"cmd":"ptReal","data":{"command":["AixQAAAFAgL/fgPMKBTMTAHMFBQCABQFL6r/ntr+/6U0/38A/wAAAAAAAAAAACxVAAAFAgL/fgPMKBTMTAHMFBQCABQF/wAA/38A/6U0ntr+L6r/AAAAAAAAAA=="]}}} I get nothing. Any suggestions? |
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You want to use the "b64_cmd" data (from the JSON I generated) for the command field. For Christmas, try the "b64_cmd" data you posted, like this: I personally use a docker instance of Node-Red for the bulk of my home automation. There are a bunch of UI nodes that pull data and format it and send it to a "UDP out" node -- it is messy. But, I send the scene commands the same way as I send power, brightness, and color commands. So, if you have those functions working, you are doing it right. It just seems the command you are sending is not correct. |
This commit adopts the excellent reverse engineering work carried out by @AlgoClaw in egold555/Govee-Reverse-Engineering#11 (comment) as the way that we apply scenes. This should result in fewer weird glitches and more accurate application of the defined scenes. My testing of this has been light; there is a unit test that verifies the example from the walkthrough of the process, and I used the CLI interface to apply a couple of scenes: ```console ./target/debug/govee lan-control --ip 192.168.1.201 scene Breathe Loading environment overrides from "/home/wez/wez-personal/govee-rs/.env" Computed ["o/8BAQIAAAAAAAAAAAAAAAAAAF4=", "MwUECgAAAAAAAAAAAAAAAAAAADg="] ```
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@AlgoClaw this is great, thank you! I've pushed a version of this in govee2mqtt: wez/govee2mqtt@5de5b50 It seems to work when used via the CLI interface. I haven't tested it beyond that at this time, so I haven't made a release with these bits yet. |
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The most recent govee2mqtt release now prefers to use the LAN API with this technique |
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Thank you @AlgoClaw for solving the puzzle and thank you @wez for integrating it so fast. It works like a charm. The scenes now change without any delay thanx to using the local API. I'm wondering if we could find the corresponding local API commands for changing the single segments and setting DIY scenes and snapshots. |
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Thank you for the explanation! It works great now! I'm really excited to bring local control to the lights as the cloud seems unreliable. This is a game changer for my setup! To push this a bit further....have you found a way to trigger any "tap to run" scenes or turn a group on and off? I have two sets of H805a lights on my house that I want them paired together but have not found a way to do so outside of the Govee app. When I send a command to one string then the other string they are out of sync. If I use the app with the "tap to run" scenes or turn the group on and off they are closer in sync but have yet to figure out a way to do it via the API. |
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Glad to hear it. It is nice to know this works on different models too. For groups, I have not found a way to access a "group" defined in the app. Instead, I define my own groups locally on my sever (in Node-Red). As far as syncing goes, I send the command to all my devices (or a subset of devices) simultaneously. I am not sure if it is precisely simultaneous, but 80% of the time, the lights are synced together. In Node-Red, this is accomplished by linking one input node to multiple outputs ("Govee1", Govee2", etc., see below) How are you sending the commands? what language/script type? Can you make a function/script for setting a scene to device? Example: Then make a script to call a series of that function for each light ("light1", "light2", "light3")? Example: |
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I use a home control/automation system called RTI. There is a driver designed to send UDP commands to a specified IP. So for my case I would need two instances of the driver in my system as the driver only has capabilities to send to a single IP for each instance. What I'm actually just thinking about, that I will need to test, is that since its local control I can use two instances of the driver and send commands to each Govee controller in less than a second. In RTI you build macros with the driver commands you want to use. I'm thinking since its local and two different Govee controllers, the commands might not get lost like they do when I send commands to the cloud API. I found I needed to add a couple second delay when sending commands to cloud API or else the second command was lost. I gotta do some re-programming and testing but I'm thinking the speed of local control along with two driver instances might be the key to get the devices as close to sync'd up as possible. |
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I did not give proper appreciation and credit before. The techniques I used were based overwhelmingly on the work already performed by @wez and @Mavrrick. Specifically, @wez 's:
And, @Mavrrick 's
Initially, I was manually sniffing Bluetooth packets, extracting the payload, converting the hex to base64, then searching github to see if anyone else already posted that exact base64 string. Each time, there would be one-or-two results @Mavrrick included in his libraries. This let me know the conversion was correct -- but also that the number of commands needed for a scene matched the number of Bluetooth packets sent. After combining what @wez and @Mavrrick provided, I actually considered the problem "solved". However, we would have to manually sniff packets for every scene on every device--and manually re-sniff whenever Govee updated or added new scenes. The only contribution I really made was to try deciphering the "scenceParam" to see if it matched the Bluetooth hex commands--which it did, with some additional work. Also, thank you to @Hauty9 . I gave up on this several times but kept coming back because @Hauty9 kept the issue active (bumping it to the top of my inbox). |
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@AlgoClaw what Bluetooth sniffer and how have you used it to sniff the packages sent to the Govee device? |
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@AlgoClaw This is amazing work, but i have a few questions as i am having some unexpected results using the script output from this process. First are you familiar with the new ptURL command and does this take any account for that. I have yet to find any way to work with scenes that use the ptURL command at all. This ptURL command is found on a few new devices like the Net Lights, the Curatin Lights 2, and the Christmas Lights Gen 2 Second how many devices were checked. I am running into inconsistencies with what I had already extracted. Simply put when using your script to extract for the H6066 device i get one command string that is fairly different from what i had already extracted. I thought the difference would be related to maybe a speed value, but it doesn't appear to be working. My process pulls in a command string of "cmd": "["owABAgQnFR0BAAEFAAIAD57//x0=", "o/9lAAAAAAAAAAAAAAAAAAAAADk=", "MwUEDQoAHQAAAAAAAAAAAAAAACg="]" Your script pulls in a command string of The extra \ and " for data handling aside the strings have some significant differences. I am really curious to hear from others on how this works for them. The way my extract works is by using a call to the AWS service Govee uses with their Phone app. That app set of data when going to the home page and lists various things including Tap-To-Runs. Those tap to runs include in their data a section for iotmsg that includes the entire command. For the most part that has worked well to retrieve working commands, but is a pain. I was really excited to use this method to generate the list in full. The commands though are not matching up. I have tried several different commands now and none of them have matched and they don't appear to work. Ofcourse my testing so far has been with commands generated by your script. Do you believe the script may have some issues? |
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My Bluetooth sniffing method is very low-tech. I use a setting available in the "Developer options" on Android. Steps:
After step 6, the log file should be located at: I then copy this to my computer and open it in WireShark. NOTE 1: When you enable and disable the HCI snoop log, Bluetooth has to be disabled. If Bluetooth is enabled on either side, the log file (likely) will not save. NOTE 2: A lot of people on various forums on the internet say your phone needs to be rooted to capture Bluetooth data. I don't know if this is true. My phone is rooted, but I don't see why that is required for the above method. NOTE 3: Make sure you are sending commands to the Govee device via Bluetooth. I wasted so much time accidentally sending commands via the cloud. When you are in the Govee app, controlling a device, there is a Bluetooth or WiFi symbol at the top, make sure you are using Bluetooth. If you want to force Bluetooth, you can disable WiFi and cell data.
This is interesting. For the last command, there is the same prefix (330504) and converted sceneCode (0d0a). However, there is a "1d" in the following section... This would imply that the fixed padding (28x zeros, 14x hex zeros) is not correct and that some data may be present there (at least sometimes). I add padding per wez's comment above "zero-pad out to 19 bytes" -- but this may not be true in all cases. "1d" (hex) = "29" (dec) = "HQ==" (base64) None of those seem to match anything from the raw data. I'll think on it.
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I hope it's okay to post that inside this Github issue... I invested a few hours to try to set the segments of a Govee light by local API. My use case: Most of the time I want to set my Govee lights to a static gradient and not to a fancy animated scene. My knowledge is based on the very useful and detailed post of @Mavrrick found here: https://www.loxforum.com/forum/faqs-tutorials-howto-s/446672-govee-ble-local-api-segmentsteuerung-szenen that explains in detail how the "Grafiti mode" works. Thank you Mavrrick! Here is my code in my favourite coding language (C#). It's quite straightforward and easy to translate to other programming languages. I use the calculated Govee command(s) inside Home Assistant by defining a shell_command in And I call it in an automation like this: This is a very static approach, because I couldn't use any parameters in the shell_command (for IP address and the gradient colors). Now I'm thinking about exposing an individual service in Home Assistant that's taking the IP address and the segment colors so that I can call: Maybe that's also interesting for others and I think it would be quite easy for @wez to expose such a service, if this is a need also for others... What do you think? |
I'm not sure if it is possible to expose a home assistant service via mqtt, but it would be doable to expose a REST API endpoint in govee2mqtt that could do the heavy lifting. |
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FWIW, over in wez/govee2mqtt#353 some users are noting that this enhanced scene setting technique doesn't work for every device. One frustration I have with Govee's control scheme is that there is no direct response on whether any given command did a thing. It would be great if there was a way to determine that a scene had been applied--I think this must be possible (perhaps via BLE or IoT?) because I noticed in the Govee app the other day that it reports the scene name that was applied via ptReal when you first drill down into a device. |
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@wez It would be interesting to see what devices do and what devices don't work. I have a theory on that after taking a look at the devices @AlgoClaw tested with. My theory is that this is about device type as much as it anything else. All of the devices @AlgoClaw appears to have validate with are String/strip type devices. What i mean by that is they all run in a series of pixels with no fancy geometric lighting effects with them. The H6066 device i initially started testing with is a Govee Glide Hexa Pro kit. The H6066 didn't work at all with any of the commands passed. I just ran the script for one of my H6172 strips and compared it to my existing command list I had extracted a while ago. The spot checking I did indicated everything was matching up exactly. So at the least that LED Strip matches up perfectly. I feel like i need to go through and test the other types of devices to see how close the commands match up. The ptURL command was something that I found recently with the help of a user as they were having a problem performing the scene extraction in my integration my process on Hubitat. Simply put when my process calls the AWS endpiont we get back a long string that includes all of the Home page data for the Govee Home app. The integration parses down and find a specific group for Tap-To-Runs. Then each tap to run has each action reviewed for certain criteria that make it a Govee Scene, Snapshot, or DIY. Part of that criteria was looking for the ptReal command. Once that was found it would extract out the iotmsg and parse out the cmd value for further processing and saving in the integration. After a far amount of back and forth and confirming the user had everything right we dug into the raw data to find the ptURL command was in place of ptReal. The command structure was also very different. Below you can see some examples of what was stored from the extraction process for a H70B5. Even worse is that unlike ptReal, the ptUrl command doesn't seem to work when submitted via the LAN Api This ptURL command is very new and so far I have only seen it on a few devices that were released in the last few months. Interestingly your process does create a command for the ptURL scenes, but when i reviewed them they were very , very long. like 80+ commands vs 7-8 of most scenes on other devices. @loebi-ch I think you maybe giving me credit for something I wasn't associated with, or at least nothing in that link. In anyway i don't think that was me, maybe another Mavvrick :) |
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In the link provided by @loebi-ch, there is a link to another post worth looking at https://blog.coding.kiwi/reverse-engineering-govee-smart-lights/ Also, @Mavrrick on the loxforum thread, at the bottom (most recent post) there is mention that the prefix is "a4" for the "Govee Christmas tree chain H70C4". I wonder if this change would work for those devices currently not working? Simply changing the prefix to "a4" (instead of "a3"). "a3" works on my devices -- so one of y'all could give it a try. It's unfortunate it does not work for all models. :/ Regarding device feedback, I have found several quarks/bugs. For any scene requiring multiple commands, if you send only the last command (e.g., "MwUE1AAAAAAAAAAAAAAAAAAAAOY=" for "Forest"), the lights will restart their already-selected scene (but they do not change to "Forest"). Further, if you send only the last command, the app will show the scene changed to "Forest" -- even though it did not actually change (if you have scene selection in the app already open, you have to exit out of the device and re-enter the device's scene selection). Conversely, if you send all commands except the last command, the scene does successfully change -- but the change is not reflected in the app. Effectively, that last command is optional for control. If you wanted to be devious, you could mix-and-match. For example, using the H61A8, the first 7 commands below set "Forest" without the last command to change the setting in the app. Then, I add the last command for "Meteor shower". Thus, the scene "Forest" is set on the device, but the app will show the scene "Meteor shower" is selected. So, if you really want to gaslight somebody into thinking a scene goes by a different name, this is how to do it :) Also, I noticed when using the scenes set via cloud integration in govee2mqtt, the app does not show any selected scene. That is, the cloud integration via govee2mqtt is the equivalent of sending all commands except the last command. So, there is no way to tell in the Govee app what has been set. What does the "devStatus" command return? Node-RED is problematic if I remove the container and need to takeover ports 4002 and 4003 from govee2mqtt. @wez is there some way for me to enable verbose reporting for ports 4002 and 4003 in the container logs? |
You can set the log filter to (set that in the env for the docker container, or if you're using the hass addon, there is an option for this in the UI) and look for and |
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May have found a pattern or at least something for the H6066 I took the command created by the script, and the command i already had for a scene and converted them both back to Hex Here is the hex code for the script and what i had for scene Mirage My command: Script I see three differences on line 1. The first is related to a change from 02 to 04 in positions 9 and 10. I think The procedure indicates that should always be 02 so i suspect this is one error of concern. How do we determine that. Then I noticed in the script output it looks like there is a value from positions 11-10 that is missing from the command I received from the method I use. If those characters are removed then the rest of the command looks like it matches up. Lastly there seems to be a new value in the padded 0's in the final line I am suspicious about it relating to the speed for the scene, but need to further test that. I validated again with scene Dreamland and saw the same thing happen. The Characters in position 11-20 where slightly different but regardless from the script, but they were missing from my working command. Further testing is needed, but this looks promising |
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Yeah, I wrote about the "1d" in the padding in my reply to you (#11 (comment)) These 2 sites provide good insight into what may be happening in that last command:
(they have good info on how to change sections too @loebi-ch). The first link is effectively the same process I went through. However, I am 99% sure that the last command is not actually required to set the scene -- it only changes the status in the app (see #11 (comment)) The "Mirage" info for the H6066 has the following "scenceParam": EgAAAAAnFR0BAAEFAAIAD57//2U= Converted to Hex, this is: 120000000027151d010001050002000f9effff65 The correct commands (you posted) are: Thus, most of the first line can be taken from the converted scenceParam: first line : a300010204 27151d010001050002000f9effff 1d scenceParam: 1200000000 27151d010001050002000f9effff 65 |
I've been poking at things and found something that I think you may find useful, and may be worth documenting here.
You can download a catalog of pre-defined scenes for a given sku; you need to pass the AppVersion header for it to return anything:
$ curl "https://app2.govee.com/appsku/v1/light-effect-libraries?sku=H6072" -H 'AppVersion: 5.6.01' -sWhich produces data like the following abbreviated excerpt:
{ "message": "success", "status": 200, "data": { "categories": [ { "sceneId": 7691, "iconUrls": [ "https://d1f2504ijhdyjw.cloudfront.net/deals-img/c1068ace12a82ee32333f5c35bbc154e-new_light_btn_scenes_four_color%403x.png", "https://d1f2504ijhdyjw.cloudfront.net/deals-img/9215bf8e3df86bd03eb32b93fd3f5b3b-new_light_btn_scenes_four_color_press%403x.png", "https://d1f2504ijhdyjw.cloudfront.net/deals-img/6b7e891d014ba5742fbbc02368e077e9-new_light_btn_scenes_four_color_dark%403x.png" ], "sceneName": "rainbow B", "analyticName": "rainbow B", "sceneType": 2, "sceneCode": 0, "scenceCategoryId": 0, "popUpPrompt": 0, "scenesHint": "", "rule": { "maxSoftVersion": "", "minSoftVersion": "", "maxHardVersion": "", "minHardVersion": "", "maxWifiSoftVersion": "", "minWifiSoftVersion": "", "maxWifiHardVersion": "", "minWifiHardVersion": "" }, "lightEffects": [ { "scenceParamId": 11837, "scenceName": "", "scenceParam": "ASkAAAAHAgH/gQD5FBQD+RQG/wAA/38A//8AAP8AAP//AAD/EADyAACAAA==", "sceneCode": 10191, "specialEffect": [], "cmdVersion": 1, "sceneType": 2, "diyEffectCode": [], "diyEffectStr": "", "rules": [], "speedInfo": { "config": "", "speedIndex": 0, "supSpeed": false } } ], "voiceUrl": "", "createTime": 0 }, ], "supportSpeed": 1 } }The part of interest is the
sceneCodein thelightEffectslist; for theRainbowabove, ignore its directsceneCode: 0and look inside itslightEffectslist for itssceneCode: 10191Using some
jq, we can produce a simpler list:outputs something like this excerpt:
[ { "name": "Sunrise", "code": 2099 }, { "name": "rainbow B", "code": 10191 }, ]Armed with that you can now construct a BLE packet that will activate a scene if you know its name. Taking that
rainbow Bexample, its scene code is10191in decimal. Convert to hex to produce:0x27cfwhich you can break into two bytes and swap around, adding on to a scene mode packet, similar to the others discussed in this repo:then zero-pad out to 19 bytes + checksum and voila, you have a packet that you can send either via BLE or via the LAN
ptRealcommand that will activate that scene.I figured this out by following https://github.com/bwp91/homebridge-govee/wiki/Scene%2C-Music%2C-DIY-Modes which suggests saving a short-cut for a scene in the govee app, and then plucks the corresponding base64 encoded version of the packet out of some data returned from another govee URL.
Staring at some other data from the new HTTP platform API that returns scene codes (https://developer.govee.com/reference/get-light-scene), I realized that the code was embedded in that packet.
LAN Protocol and ptReal
The Govee LAN Protocol doesn't document this, but you can send BLE packets to the device via the LAN protocol by encoding them as base64 packets and sending data like this to UDP port 4003 on the target device:
{ "msg":{ "cmd":"ptReal", "data":{ "command": ["MwUEzycAAAAAAAAAAAAAAAAAANo="] } } }The text was updated successfully, but these errors were encountered: