4: new full-speed USB device number 6 using dwc_otg Oct 12, 2023 · Saved searches Use saved searches to filter your results more quickly This idea came from developer discussion between zigpy-znp developers in zigpy/zigpy-znp#10 Would it be possible to script a "backup and restore" migration feature/function built into zigpy radio l Device model. Pairing is successful, configuration is successful. hex in the coordinator. @Koenkk I flashed my cc2531 with coordinator firmware from the link. Dec 1, 2020 · Is it possible to use Zigbee 3. 32. 0 USB Dongle (model "ZB-GW04") Ember: 115200bps Hardware flow control or 115200bps Software flow control High RAM: USB dongle based on Silicon Labs EFR32MG21 MCU. I reflashed my stick recently but that didn't fix the issue. 2 (default) firmware of 27 november 2020. Sep 8, 2023 · It looks like the coordinator crashed, this is very likely due to the 20230507 firmware, try the 20230901 firmware from this thread. 2. zip from Apr 16, 2020 · To make an EmberZNet firmware for an EFR32 or an EM35x chip you have to build it in their Simplicity Studio, there add the EmberZNet PRO Zigbee Stack as an app and set its configuration if it should be a Zigbee Coordinator (Controller), Zigbee Router (like a mains connected plug or light), or a Zigbee End-Device (like a battery-operated sensor Aug 21, 2020 · Adapter firmware version: zStack12 20190608. Feb 17, 2022 · FYI, xsp1989 has uploaded a signed Zigbee Router firmware for ITead's Sonoff ZBBridge which could possibly make it a Tasmota/ESPHome connected Zigbee Router (instead of as a Zigbee Coordinator). This Zigbee NCP firmware has only been tested on the EFR32MG21 based "Zigbee 3. Firmware for devices with constant power supply (smart plug, light bulb,relay modules, etc. db, it was set to the same ieaddr of CC2530#1 May 10, 2019 · edited. Firmware is based on ZiGate-Ethernet . 0 coordinators can only support a limited amount of Zigbee 3. In december 2020, I was running Z2M through docker and didn't have this issue (can't find the version I was using). The goal of this project is to add native Position the Zigbee coordinator away from Wi-Fi access-points/routers or other sources of 2. Plugging it in resulted fast red led blinks. 0"? Silicon Labs EmberZNet NCP Zigbee Coordinator firmware with Silicon Labs standard EZSP (EmberZNet Serial Protocol) interface. Zigbee3. It also hosts unofficial Zigbee Coordinator and Thread (OpenThread) firmware builds that community members can experiment with at your own risk. Update! Zigbee EmberZNet SDK 7. For this module, we had to build a special Z-Stack ZNP firmware, since there was no firmware for such an amplifier. Try and Zigbee pair the router to the coordinator. 0 USB Dongle Plus V2 model "ZBDongle-E" hardware from ITead. So i decided to flash with the Koenkk one : https://gith . 0, so I decided to use the old stick as a router for other devices and flashed the router firmware 2020_09_29. This firmware is open source, so feel free to improve it or adjust it to your actual needs if needed. 2) have now also been released as a bug-fix release: Oct 28, 2023 · When I activate Zigbee pairing from withint the ZHA addon in Home Assistant, the CC2531 with router firmware never pairs with the CC2531 coordinator! To try and debug the setup, I loaded the CC2531 router with the 2020_09_29 version of router-cc2531-diag-usb. 2sr is suggeste Silicon Labs firmware builder repository. Dec 8, 2022 · ESPHome custom firmware for ZB-GW03 eWeLink Ethernet Zigbee Gateway Compatible hardware ZB-GW03 Zigbee to LAN bridge/gateway based on Espressif ESP32 and a Silicon Labs EFR32MG21 Zigbee radio (CoolKit-Technologies "SM-011 V1. x. Dec 4, 2023 · I would like to suggest that you look into making and selling an upgraded variant of your ITead's Sonoff ZBDongle-E (Zigbee Coordinator USB dongle adapter) that would instead be based on a new Silabs EFR32MG24 SoC chip with more RAM + more Flash: Jun 27, 2020 · Just got my zig-a-zig-ah usb stick from Electrolama. Firmware for the coordinator (sticks and modules) router. json and database. x) Zigbee Coordinator NCP firmware images for these adapters?. The application is configured to operate as a ZigBee Coordinator / Router. Ideally, you want to place the Zigbee coordinator somewhere in the middle. 0 USB Dongle Plus who unfortunately said that ITead has no plans on maintaining and distributing their own "ITead official" firmware images that supports hardware flow control on it, and continued to say that they currently But they only appear since the CC2531 firmware update from 20190425 to 20190608. The firmware builder uses the Silicon Labs [Gecko SDK (GSDK)) ( https Apr 23, 2023 · The IT coordinator firmware is having most of the advanced Zigbee 3 child handling disabled that is making many new end device cant or having problem connecting direly to it. I hope this picture explains your question: NOTE: * For this picture I've assumed that the routers support 10 direct children! Hi @Koenkk Can't get this to work with the hassio zigbee2mqtt-edge image (Zigbee2mqtt 1. 0 then with zigbee 1. The other was flashed with the latest router firmware (CC2531_router_2020_09_29. EZSP is 100% and is Zigbee certificated with then standard setting is being used. Special Note. Mar 3, 2020 · Followint this: Due to new security requirements in Zigbee 3. You signed out in another tab or window. First I tried to migrate the radio from ZHA settings and it failed on importing the b Wifi a Bluetooth(BT) vysílají na stejné frekvenci jako Zigbee, takže pokud používáte na vaší Raspberry Pie(RPi) jedno z toho a potřebujete Zigbee signálem pokrýt co nejvetší oblast tak volte variantu USB a připojte ji 0. @grobasoz Might also be nice idea to offer a Zigbee router firmware as an option, similar to request in tube0013/zb_ebyte_eth#1 It would be very nice to have a few EFR32MG21 based Zigbee routers as Zigbee network mesh extender (a. The whole zigbee network expects the coordinator to be available 100% of the time, so if the 2652 is talking over BLE right as a zigbee message is sent to it that would probably result in the end device that sent the message dropping out of the network, maybe even Feb 11, 2020 · Sonoff BASICZBR3 currently comes with Z-Stack 1. Sep 27, 2022 · Note! This request is for ZDongle-E with Zigbee Coordinator firmware (and not related to request with "Zigbee Router firmware"). Thanks for the quick answer! 20230901 installed along with docker 1. Features: ESP8266 to run Zigbee2Tasmota; CC2531 Zigbee interface; 3D-printable case; More information is available at: https://www. Therefore, I want to flash it with Z-Stack 3. tv/z2t We would like to show you a description here but the site won’t allow us. I hope this information can be of any help. coordinator. Buttons: SW1 – Changes a virtual state of the router (the router sends it in a diagnostic report) and a state of the green light. Apr 27, 2020 · The main issue regarding building a such "standard" Silicon Labs EmberZNet Zigbee coordinator firmware image for an EFR32MG12 SoC is that in order to to get access to the EmberZNet Zigbee stack from the official Simplicity Studio software you first need to buy and register an official development kit for Zigbee from Silicon Labs, to gain Nov 25, 2021 · A lot of people are still buying and using EM35x and EM358x based adapters like the Nortek GoControl QuickStick Combo Model HUSBZB-1 (Z-Wave & Zigbee Ember 3581 USB Adapter) and the Bitron Video/Smabit BV AV2010/10 USB-Stick (a. Regularly update the Zigbee Coordinator USB adapter/dongle/stick firmware as new versions contain bug-fixes from Silicon Labs SDK, and most important is to also always use the Zigbee Coordinator USB adapter/dongle/stick using a very long USB extension cable, as well as only ever connect it to a USB 2. dst16 == 0xfe58. aliexpress. io/ Z-Stack-firmware. zip). 0-1. On the router side, it appears to pair, as the LED indicates normal operation, but I see no reference to the device on the web interface or logs. 1+dev) Actually the very first bulb (1 out of 4) paired with the stable release 1. For Zigbee 1. The following dongle can be used. Update from CC2652RB_20200805. 6. Firmware description. x (Texas Instruments Zigbee Stack) based Zigbee 3. a. The device successfully joined the network, and looks like to be recognized by zigbee2mqtt, but I am not able to add it using Hue Essential app, and Zigbee2MqttAssistant tells that the device is not supported. 5 (no upgrade), zigbee coordinator properties in Paper UI are missing coordinator firmware version and other properties (see screenshot below). k. Short single press – to re-send a binding request to a coordinator (it allows you to test a connection). load 2020_09_29 version of router-cc2531-std. The following two bridges are used. Realized raw PDM backup memory of NXP JN516x zigbee chip and recovery. 0. The guys from our community tried to use TI cc2530 modules from EBYTE with a new cc2592 amplifier with a power of 100mW E18-MS1PA1-PCB. Owner. 0" module). 0 devices still work? I would like to use the new Aqara Single Switch Module T1 (No Neutral) SSM-U02 with Zigbee 3. 0 devices that can join. Reload to refresh your session. Had some problem with z2m starting but after I deleted coordinator_backup. Anywhere you recommend to start? Currently I'm running it with a DeConz coordinator, but I'm slowly getting fed up with minor stability issues. mesh to heal itself, not hang, not sure if issue is in coordinator firmware or in the mesh itself, if I have to replug the adapter it says Error: Failed to connect to the adapter (Error: SRSP - SYS - ping after 6000ms) in the logs Nov 7, 2020 · @mercenaruss I don't see why it's off-topic and I liked the fact to @sjorge provided feedback to my instructions (which turned out to only be working for me). Before the update I didn't have such errors. ele_update parameters changed. com/item/1005002791666029. Today I had no new data from all routers in my network (CC2530, Ikea Tradfri Repeater, Innr SP120) and had to restart Zigbee2MQTT and power cycle all routers with allow join enabled. 0_Dongle-NoSigned. hex. 10 Zigbee Firmware for ELU013/ELR023 (just keep up with the latest EmberZnet SDK) Their firmware update tool has also been updated with a few new features: Elelabs/elelabs-zigbee-ezsp-utility@721019c. ZigbeeBridge_SM-011-Singed. And the results exceeded expectations! The tests with the “round button” from Nov 5, 2021 · Fixed by switching firmware from Z-Stack_Home_1. html. I think that this firmware image should also be compatible with ZB-GW03 as it too uses "SM-011 V1. My problem is, whenever I update the software for the coordinator or when I restart, I have to reconnect all 20 devices so that they get a connection to the coordinator. After moving all my home automation from Home Assistant to Hassio (on a RPI 3), all my Aqara sensors (almost) stopped working. ZigBee Funkstick) because they are the first USB adapters that show up in a quick search on Amaazon and are also A collection of Zigbee OTA files, see index. FYI, submitted the question via e-mail to ITead and got a reply email from ITead's project manager for the Sonoff Zigbee 3. Easyiot Zigbee 3. I'm giving up. I'm not completely clear on what is handled by the coordinator firmware and what is handled in ZigBee2mqtt code. @SillyDay Taught I just ask if you would mind helping out Tasmota developers with building Zigbee coordinator firmware images with the EmberZNet Zigbee stack for EFR32 based Sonoff ZBBridge? Jun 21, 2020 · Just my two cents with the little knowledge I have but I feel like using DMM on a zigbee coordinator seems like a terrible idea. 0 profile router (including routing for the Oct 24, 2020 · I've done a firmware update on slaesh’s CC2652RB stick. PANID:1A62,Ch:11,Join:1 is only thing I see via usb diag - Join:1 is when I Permit to Join on cortinator, when I dont I s Saved searches Use saved searches to filter your results more quickly Sep 5, 2022 · It appears that the GP Proxy code is not enabled in coordinator ZNP code, even in the most recent versions. That goes in the direction of fixing it by updating coordinator firmware. 1 without any problems, but all 3 other bulbs don't want to pair at all, this why I found this topic. If I try to pair it via HA add device GUI, nothing happens. com/zha-ng/zigpy-znp https://github Apr 26, 2020 · One of them flashed as coordinator. cc/zigbee-3-0-usb-dongle. x coordinator Jan 11, 2022 · @xsp1989 could you compile Zigbee EmberZNet 7. m Zigbee Coordinator. I have downloaded the firmware CC2538_CC2592_MODKAMRU_V3_20200327. Uses the Zigbee2Tasmota firmware to operate as a Zigbee Coordinator. What happened I read about the SMARTLIGHT CC2652P Zigbee USB dongle : By default, Zigbee adapters come with pre-flashed firmware from Egony. Hi @asgothian, sure, here's more info and thanks for looking into the issue: OS: Raspbian, up-to-date Coordinator: CC2652RB type:zStack3x0 version:2-1. Jan 24, 2020 · What is the difference between coordinator firmware versione 3. Outline In a clean install of openHAB 2. Feb 8, 2023 · I upgraded my old CC2531 stick to a SONOFF ZIGBEE 3. I am developing my own ZLL device using a NXP JN5168 zigbee module, using the provided example codes from NXP application note. 2 (with source routing)? I am a bit confused. 3 meters and 1 wall, the linkquality is about 55. zigbee2mqtt. Added. 2, the unsigned firmware is used. I reinstalled my whole network by: have a fresh iobroker installation with zigbee adapter 0. If you’ve applied the two keys - trust key, and the transport key (Shown during pairing) into the Zigbee AES-128 encryption, 32 bit Integrity Protection. What did you expect to happen. 9. May 12, 2020 · Z-Stack 3. 7. I was expecting a signal boost comparing it to my cc2531, which never had a good signal to begin with. What happened. No ZigBee Cluster Library (ZCL) application-layer functionality is preconfigured. hex into the router. I use a coordinator, 2 routers and 18 Zigbee devices. 211935] usb 1-1. 0 coordinator firmware already available for it from the Zigbee2mqtt project makes it already compatible with the Zigbee2mqtt gateway with Home Assistant (as well as with other home automation software such as IoBroker, Domoticz, and OpenHAB). 2 coordinators there is no limit on the max number of Zigbee 3. For HomeAssistant's Built in ZHA implementation: Add the ZHA Integration via the Add Integrations option: In the next dialog select Set up another instance of Zigbee Home Automation: Select the Radio type: For CC2652p based gateways select ZNP. Elelabs/elelabs-zigbee-ezsp-utility@e9b3fe1. 0 devices. zigpy-cc is a Python 3 library implemention to add support for Texas Instruments CC series of Zigbee radio module chips hardware to the zigpy project. My Z2M HA addon is on version 1. This repository contains Dockerfiles and GitHub actions that build Silicon Labs firmware. Again it is true that @Koenkk is not recommending running CC2530 or CC2531 hardware as a Zigbee 3. 0 GA (7. I use this filter: wpan. Feb 20, 2020 · PR supported here #149 @Koenkk @reverieline Please understand that some information about CC2538 support might still be missing as I note below:. But a more general judgment method is the version of the bootloader. ka. Then you can filter on the device. Those who wish can try. The best location depends on your building's floorplan. 2 I should know in an hour or two Maybe once you and Koenkk get some CC2674P USB radio adapter prototypes and Z-Stack NCP Zigbee Coordinator firmware working with zigbee-herdsman for Zigbee2MQTT (and IoBroker) then maybe also ask if puddly as the developer of the zigpy-znp radio library want a prototype for sample too for broader testing (since zigpy is used by Home Assistant You signed in with another tab or window. However, trying to unbind the remote from the coordinator alwa Note: This firmware is for simple CC2531 boards without an additional RF front-ends. Sep 2, 2020 · Saved searches Use saved searches to filter your results more quickly Aug 23, 2020 · Bug Report What happened Paired Hue remote to network with deCONZ coordinator. You switched accounts on another tab or window. The used CC2538 module has an onboard CC2592 PA/LNA for range extension. revision:20210708 Sep 23, 2020 · When the button is pressed, you should see continuity (and likely hear a beep). To avoid interference between Zigbee and Wi-Fi try to choose channels without overlap. 0 and 1. If the bootloader version is displayed as 1. Oct 28, 2023 · Load two CC2531 USB dongles with custom Z-Stack-firmware: load 20211115 version of CC2531ZNP-Prod. x is only supported on a module with on CC2538 + CC2592 or if it is also supported on modules with only CC2538 without an amplifier chip or a module with CC2538 and the CC2591 amplifier chip? Bug Report What happened Multiple msgs received in response on state change of S31ZB - SONOFF Zigbee smart plug (US version) What did you expect to happen Single message should be generated per each topic How to reproduce it (minimal and Jan 4, 2020 · Given that: CC2530#1 is the new router, previously used as coordinator; CC2530#2 is the new coordinator; I was able to start z2m again setting ieaddr of coordinator to blank in database. . Apr 23, 2021 · Therefore, if using these ITead Zigbee 3. 0 port or via USB 2. 20. xx (xx==02/03/04), the signed firmware is used, and if the bootloader version is displayed as 1. Elelabs/elelabs-zigbee-ezsp-utility@31f8e9c. This repository contains compilation instructions and compiled Z-Stack firmwares for the Texas Instruments CC2530, CC2531, CC2538, CC1352P, CC2652P, CC2652R and CC2652RB. EmberZNet Zigbee NCP (coordinator) firmware image builds are available here. 2 firmware with a "Zigbee Home Automation" profile so it does not support the Zigbee 3. Please note that I am not sure if Z-Stack 3. superhouse. Unfortunately, the linkquality of for example my Xiaomi Temp Sensor, or my Opple Switch, decreases quite a lot. 3V on point A when the stick is plugged in. The only problem that strongly interferes is the absence of PDM backup and periodically the chip reports that after rebooting it is Factory reseted. Oct 19, 2020 · Hello, I'm trying to flash the router firmware in my CC2538 stick (Modkam. 820326] usb 1-1. Now User xyzroe come up with idea to build a customisable firmware for our LAN Coordinator. 1. Contribute to codm/czc-firmware development by creating an account on GitHub. Normally, ZB-Bridge and ZB-GW03 use signed firmware, and dongle use unsigned firmware. Now after 4 days it suddenly comes to problems. x firmware as a switch and router firmware on CC2530 and CC2531 hardware might not have the same performance issues are running Z-Stack 3. You can use the usb connector shield as GND. 0 together with the old Zigbee devices. You signed in with another tab or window. db files from zigbee2mqtt folder everything worked correctly. Where 0xfe58 is the zigbee Destination device , a radiator valve in this example. 4GHz signals to avoid signal interference. Firmware for sleeping devices/end devices (typically battery powered devices) Jun 8, 2020 · Best would probably be if users could have this ability if only they first manually download and rename firmware binary image file in a specific format to a predetermined file-name and then place that correctly formatted/named file in a specific directory before being able to issue an "upgrade coordinator firmware" command. I tried several options : enable GP_DATA_IND callback (no effect), enable GP proxy and sink (no effect). This is just a guess, but I think it could be solved by flashing again 1. Dec 18, 2020 · zigbee2mqtt + cc2531 + router firmware issue with connecting to cc2531 coordinator I tried and flash CC2531_router_2020_09_29 std version as the diag-usb one. This repository contains the firmware for the ESP32 peripheral module of SLZB-06 Zigbee Ethernet PoE USB Adapter. itead. Jan 31, 2022 · The EmberZNet ZigbeeMinimalHost sample application provides a minimal functional subset to serve as a starting point for users wishing to build their own ZigBee Host applications. @Daniel-zhan-itead Can you enable "touchlink" (touchlinking) support in Zigbee Coordinator NCP firmware imag Feb 14, 2020 · Maybe time for me to dive into the code to understand what is behind the efficiency remark. bin. Dec 3, 2023 · The problem I wanted to upgrade the zigbee hardware ( coordinator ) by replacing the Sonoff ZBBridge with ZBBridge PRO ( both using Tasmota firmware ). com Apr 6, 2020 · I am trying to assemble a USB stick using CC2538+2592 (MODKAMRU Zigbee V3) for coordinator. 2, but, as you can see, most of the time in the issues on github, switching to 1. Jan 9, 2019 · The normal firmware (which I highly recommend) has support for 15 direct nodes. This one works as expected, I can connect/pair devices through this device. ) ed. Unfortunately I need to re-pair all my devices. 0 hub (and never a USB 3 Configure your software to access the device. x firmware because I want it to be a Zigbee 3. @basilfx FYI @mtx512 now also build custom Silabs EmberZNet Zigbee coordinator ZNet EZSP NCP firmware for ICC-A-1 https://github. 4: USB disconnect, device number 5 [68. Contribute to eimann/czc-firmware development by creating an account on GitHub. Buttons description ZigBee CC2538 Raspberry Pi Coordinator - a ZigBee Coordinator designed for the GPIO of the Raspberry Pi running Z-Stack Firmware 3. 0 coordinator and if that will improve Firmware for cod. 2 DEFAULT but with the last version 2020-11-27. This could al Nov 11, 2023 · Z-Stack_3. 0 USB dongles as routers in USB-chargers was possible in that scenario, the least expensive option today to get started would be to buy four of these ITead Zigbee 3. 2 (default) to Z-Stack_Home_1. Adding new and updating existing OTA files Go to this directory Nov 11, 2019 · Thanks @manup for the reply, well as you mentioned for a security point of view and the mesh/range should be better with zigbee 3. zigpy-cc. 0 coordinator in a production environment because of performance issues, but using Z-Stack 3. Zigbee signal repeater) Dec 3, 2020 · Saved searches Use saved searches to filter your results more quickly Nov 3, 2021 · A busy Wi-Fi access-points/routers that are operating in the same frequency range (overlapping channels) as your Zigbee coordinator will drown out the Zigbee traffic, especially if they are located close to each other. Pressing a button produces Zigbee messages. x (7. 2 (source_routing). As mentioned in other issues some of us suffer from lost devices (like this issue -> #1261) so i'm looking for a way to improve that, that's why i would like to know if the conbee 1/2 will be a zigbee 3. But Zigate V1 firmware has seemed to be corrected and work as it should. Good information. When the button is pressed, point A should read 0V. Description. And was completely rewriten to match our PCB and required functions. Thank you Mike. 0 coordinator 20231111/20231112 feedback Update: a new test firmware has been released: #496 Since some users are having issues with the 20230507 firmware which they didn't have with 20221226, I've compiled 2 new test firmwares. com/mtx512/efr32 https://github. If you want to take this one step further, in "normal" (not BSL) mode, you should see 3. 0 devices with this kind of firmware? Or do I need to upgrade to the Z-Stack 3 coordinator firmware? If I will upgrade to this version, will the old Zigbee 1. 0 profile (which among other profiles includes "Zigbee Light Link" profile). 0, 2. I've published a new firmware for this which sets the default transmit power from 0 to 20 dbm (big thanks to @egony). When stick restarted - both double blinking (depends on zigbee-heardsman status and disable_led configuration) Leds can be turned OFF/ON by zigbee2mqtt config. For EFR32 based gateways select EZSP Please consider NVRAM backup and restore feature Texas Instrument Zigbee coordinator similar to what zigpy-znp has: https://github. 0, Zigbee 3. Zigbee coordinator firmware updater image for upgrading firmware on Nortek GoControl QuickStick Combo Model HUSBZB-1 (Zigbee & Z-Wave USB Adapter) and Telegesis ETRX357USB adapters, as well as possibly other Zigbee adapters based on similar EM358x/EM3581, ETRX35x/ETRX357, and EFR32MGxx MCU chips from Silicon Labs. Apr 16, 2020 · The idea here with Tasmota on Sonoff ZBBridge would be to replace the complete firmware on the ESP8266 MCU SoC with the Tasmota and hopefully leave the EFR32 Zigbee MCU SoC Zigbee coordinator firmware as it is (as hopefully that already have the correct standard firmware that you need). 5m USB prodlužovacím kabelem k RPi. https://www. ru) But with version 19052020 the blue led still fixed blu and do nothig, WIthe the 20 and 22 version the stick remain off Nov 16, 2020 · By clicking “Sign up for GitHub”, info 2020-11-16 12:20:25: zigbee-herdsman started info 2020-11-16 12:20:25: Coordinator firmware version: EmberZNet Zigbee NCP (coordinator) firmware image builds from tube0013 are available here). see abstract log file: [67. I am running the Z-Stack_Home_1. 2 and dev coordinator firmware from 23 february for 4 days without errors. In my simple mind 3 > 1. Mar 27, 2020 · mesh appears to hang, have to restart \ replug coordinator to solve it. 0 USB dongles for a total of $21 and then use one of the dongles as the Zigbee coordinator in a Raspberry Pi and the other three dongles as Apr 5, 2024 · Firmware for cod. In light of the current war against Ukraine, we kindly ask you to support Ukrainian people by any means - support Ukrainian May 23, 2020 · Bug Report What happened. Including but possibly not limited to Texas Instruments CC253x, CC26x2R, and CC13x2 chips flashed with a custom Z-Stack coordinator firmware. Changed. All my previously added devices started to work with new coordinator. hex to np_CC2652RB_20200715. json for an overview of all available firmware files. It is only in the sink examples, but it won't help us here. kj bo tk qr ng qt em nt cb nb