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FAQ

KNX board

Where can I buy a KNX Bridge board?

You can buy it on taobao.

Or if you are not in mainland China, you can email your needs information to q648993779@gmail.com.

What's the difference between KNX Bridge Board type A and type B?

They communicate with knxd running on a raspberry pi (or computer) via different hardware interface.

Both HaChina's KNX board(shield) type A and type B can connected to raspberry pi via USB.

Type A can also be a shield plugged into Nodemcu-32s's 38-pin connector, and communicates with knxd using TCP on the Wifi.

Type B is a shield which can be directly plugged into the 40-pin connector on raspberry pi(ZeroW/3B/3B+/4B) board.

Can I make a KNX Bridge Board myself?

Yes, of course. You can base it on ncn5120, or any other IC supporting KNX Bus.

How can I enable the primary UART on PI OS?

  1. Start raspi-config: sudo raspi-config.
  2. Select option 3 - Interface Options.
  3. Select option P6 - Serial Port.
  4. At the prompt Would you like a login shell to be accessible over serial? answer 'No'
  5. At the prompt Would you like the serial port hardware to be enabled? answer 'Yes'
  6. Exit raspi-config and reboot the Pi for changes to take effect.

When you have these done, /dev/ttyS0 and /dev/serial0 will be the primary UART.

How can I enable the primary UART on HassOS?

  1. Edit file config.txt.

    It's on hassos-boot partition of the tf card. You can find it by pluging the tf card into a Windows computer, or find it under /mnt/boot/ when you login to HassOS.

  2. Uncomment enable_uart=1 in config.txt, and save it.

  3. Reboot the Pi for changes to take effect.

When you have these done, /dev/ttyS0 and /dev/serial0 will be the primary UART.

knxd docker

Must knxd runs on raspberry pi?

No.

You can run it on different architecture computers including amd64/i386/armv7/aarch64.

If my computer is not armv7, where can I get the docker image?

The docker images are:

  • zhujisheng/armv7-addon-knxd(It's for 32bit OS on RaspberryPi)
  • zhujisheng/armhf-addon-knxd(It's for RaspberryPi Zero W)
  • zhujisheng/aarch64-addon-knxd(It's for 64bit OS on RaspberryPi)
  • zhujisheng/i386-addon-knxd
  • zhujisheng/amd64-addon-knxd It is easy to distinguish them from the name. Replace with appropriate images in docker run command.

Must knxd runs as a docker container or HomeAssistant add-on?

No.

Knxd is an open source software. You can compile it from source, and run it on any Linux host.

HomeAssistant Add-on Knxd

What's the difference between knxd add-ons in da-anda and zhujisheng's add-on repository?

zhujisheng's repository is forked from da-anda's, and add an image config.

If you install knx add-on from zhujisheng's repository, you will download the add-on(docker) image. However, you will build the image locally from Dockerfile if you install knx add-on from da-anda's repository.

Control KNX devices via knxd

How can I control KNX devices in HomeAssistant?

Once you have set up the IP Router properly, you can add KNX devices to HomeAssistant, by using knx integration.

How can I control KNX devices in Node-RED?

Once you have set up the IP Router properly, you can control KNX devices by using node-red-contrib-knx-ultimate.