Velbus network bridge to serial

English
1

Hi,

I have a unused homecenter v2 module with a raspberry pi compute module. I replaced the pi with homecenter on it with one with openhab. I already installed the velbus binding and snap tcp and it’s online.
The only problem i have is that it don’t connect to the bus, so it don’t find any of my modules. I think that the problem is the link between the network bridge and the module hardware interface. This is serial i think. I also know on which gpio the bus is connected.
I hope that someone can help me with this :slight_smile:
I want to use this module because it only requires bus connection and network, like the signum.

Regards
David

2

Hi,

Would be usefull to share the gpio connected pins (and how ic-type), maybe serialbus like you suggested.
Quite expensive rpi solution…
Gg.

3

Hi,

yeah, but a yearly renewal of the homecenter license is also expensive :slight_smile:
I found this in the config file:

#Overlay UART0 (/dev/ttyAMA0) to pin 14, 15 for Serial FTDI
dtoverlay=uart0,txd0_pin=14,rxd0_pin=15

#Overlay UART1 (/dev/ttyS0) to pin 32, 33 for Velbus connection
dtoverlay=uart1,txd1_pin=32,rxd1_pin=33

Grts
David

4

Hi David,

You got all you need for openhab connection “/dev/ttyS0”, look here:

Don’t forget to activate serialports in rpi config, look for “Disable Linux serial console”:

https://www.raspberrypi.org/documentation/configuration/uart.md

However, you can keep the debug serial active. SSH is more common.

OR

The snap “Auto discovery” manual asign mode:

Success with this!
Gg.