Resol vBus

Third party integrations
1

Hello Everyone,

I’m currently looking at moving from OpenHAB v1.8 over to Home Assistant.
It seems to do everything I need except one thing, OpenHAB has a binding to connect to the Resol controller on my solar hot water service. Anyone know if there is something similar in HA?

Regards,
Josh

2

Hi,

try that:

  • platform: command_line
    command: “curl -s /dlx/download/live | jq -r ‘.headersets[0].packets[3].field_values[2].raw_value’”
    name:
    scan_interval: 100
    The json is a kind of weird, therefore you have to play a bit arund to find your values.

regards,
-thomas

1 Like
3

Josh, just checking did you manage to get the resol working with home assistant? I am trying to get it working at the moment, but not having any joy.

4

No I didn’t, the code Thomas suggested only works with the dataloggers, not the vBus LAN gateway.

5

OK, thanks. I have the DL2 datalogger, but when I try Thomas’ suggestion the unit fails to reboot

6

I am also interested in getting Resol vbus data to Home Assistant. I’ve an RS232 interface that is connected to my solar controller and I can get data on /dev/ttyUSB0 but I have no idea how to proceed.

1 Like
7

Update: https://github.com/danielwippermann/resol-vbus/tree/master/examples/json-live-data-server does exactly what I was looking for. It generates a json which can be accessed via http.
Now I just need to get that json data to home assistant.

8

Hi,

I’ve just created a custom_component for ResolVbus, available on https://github.com/epenet/hassResolVbus
I use it with a USB serial adapter connected to a Vitosolic 200 (destination 0x0010, source 0x7321).

9

Hi

What kind of RS232 adapter are you using and any additional hardware? I’m trying to get raw Vbus data into Homeassistant and thought you couldn’t just use a standard RS232.
Any advice much appreciated.

10

I am using the adapter that was shipped with the SungoXXL Hardware (some fancy old stuff from last century)

11

I just picked up an RS232 to USB adapter.
What pins on the DB9 connection do I connect the Vbus pins 9.10 to?

12

I tried to connect my deltasol BS plus today.
It won’t work.
I use a wellemann vma440 https://www.velleman.eu/products/view/?id=441224 to connect Vbus to USB.
Configuration file are edited to match the addresses for my unit.

Tried to connect TX to pin 9 and RX to pin 10, no flashing LED.
Swapped the pins and RX on pin 9 and TX on pin 10, TX LED flashing.

After a time I get this error:

Log Details (WARNING)

Tue Dec 03 2019 23:10:01 GMT+0100 (CET)

Update of sensor.myresol is taking over 10 seconds.

Any ideas what to do?
Do I need to activate something in Deltasol? Coluldnt find anything in the manual.

13

Hi Fredrik,

Did you already find a solution for this. I want to read my Deltasol SLL.

Thanks

14

No I couldn’t make it work.
Tried several adapters (rs485).
I think you need the curcuit or an adapter for Resol.

15

I had to make my own circuit to convert vBus signal levels to RS-485.

16

What circuit do you use??
I have seen some types.

17

I copied most of the schematic from others and built a PCB to match.

Screen Shot 2020-08-30 at 20.03.39
Screen Shot 2020-08-30 at 20.03.391137×656 42.6 KB

18

Screen Shot 2020-08-30 at 20.03.44
Screen Shot 2020-08-30 at 20.03.441060×651 51.3 KB

1 Like
19

Hi! I have a number of these blank PCB’s at £10 each inc. postage to Europe. Contact me through www.gb3jv.co.uk Justin

20

do you have any picture?