Long shot with TFA Dostmann 30.3238.06

[DJathome]

Hi there all,

Since I could lay my hands on this TFA Dostmann 30.3238.06 pool temp sensor I was wondering if I could get its measurements in Domoticz.
I know I am cutting lots of corners here, but since the sensor seems to communicate with an indoor unit using 868 Mhz, so the idea to use a USB 868MHz transceiver on my 'Domoticz-running' Raspberry Pi seems not so far fetched.
Even more wishful thinking on my part was looking at the USB transceiver TFA Dostmann sells themselves.
This is the one: TFA Dostmann 30.3175 USB-transceiver Draadloos 868 MHz, I did not find a lot of info on this transceiver let alone a manual worthy of that name.

Any idea's in the community?

Thanks a lot in advance!

[DJathome]

Version: 2022.1
Build Hash: c9526851b
Compile Date: 2022-01-31 09:34:32
dzVents Version: 3.1.8
Python Version: 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]


Hi

Still a newbie here but it seems not a lot of people are in the same boat as me.
Nevertheless I was tinkering a bit in my config.

Since I have a P1 meter also in the setup (on another USB port on the Pi4) I ended up here;
$

topic.https://www.domoticz.com/wiki/PersistentUSBDevices

I do understand the point here but amongst other things I fail to see how to make the suggested settings stick in de /dev directory.

Using sudo mknod /dev/ttyUSB-TFA868USB c 188 1, I do get the new TTY in the /dev list.
In Domoticz I then can also find it listed in the dropdown for serial port in Hardware.
True, maybe I have to select a modus in my new hardware device but even then
this does not get me further, because a cat on tty-USB-TFA868USB results in;

cat: ttyUSB-TFA868USB: No such device or address

Moreover, when I reboot the Pi all newly added references to new tty* disappear in /dev

As suggested in the quoted topic above I added a rule file under /etc/udev/rules.d named 99-usb-serial.rules with the following content;
Maybe some things still are missing in this file.

SUBSYSTEM=="tty", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", ATTRS{serial}=="AQ5MU6U0", SYMLINK+="ttyUSB-SMARTM-P1”
SUBSYSTEM=="tty", ATTRS{idVendor}==“6666”, ATTRS{idProduct}==“5555”, ATTRS{serial}==“0123456”, SYMLINK+="ttyUSB-TFA868USB”

In my limited knowledge I might be cutting a lot of corners here but thanks for your attention by the way.

[DJathome]

Version: 2022.1
Build Hash: c9526851b
Compile Date: 2022-01-31 09:34:32
dzVents Version: 3.1.8
Python Version: 3.7.3 (default, Jan 22 2021, 20:04:44) [GCC 8.3.0]

Hi,

Snooping around in my Pi I did find that when I plug the USB stick there comes a new item in /dev
It is simply called usb, if I then go to /dev/usb I see there hiddev0, if enter sudo cat hiddev0 I can see a repeating pattern;

*?Q???????(????????*?Q???????(????????*?Q???????(????????*

Unplugging the USB receiver stick results in an error;
cat: hiddev0: Input/output error ending the output.

So I guess the Pi is 'reading' some data from the USB port but lacking a protocol setting it is unable to interprete the read info.
I tried to set a modus for the hardware but Domoticz answers this "can only be set using RFXmngr for now".
I do not have a window machine to run RFXmngr and until now I fail to see how one can get around this.

Any idea's would be welcome

[DJathome]

I know I am asking quite specific questions, but is there really no one that has something to share even if it were that I am in a dead end here?
Even that would be greatly appreciated.

[FireWizard]

Hi @DJathome.,

Perhaps this: https://github.com/merbanan/rtl_433/issues/1603 might help you.

Regards

[DJathome]

Hi FireWizard,

Once again thanks for your support!!!!!!

I will look in to this further later on (at this moment the water in the pool is to warm to resist)