RUTX11 MODBUS query - is the WIKI correct please?

[bigbloke]

Happy 2026 guys!

I am integrating my RUT X11 Router via Modbus over OpenVPN so I can monitor its status centrally in Home Assistant. Once I have a working config I am happy with I will share back with the community here.

the wiki at:

https://wiki.teltonika-networks.com/view/RUTX11_Modbus#Modbus_Registers

tells me the unit of measurement is 0.1 Celsius

the X11 reports its temperature as 240 which if I multiply by 0.1 is 24C

Well inside my vehicle (on the driveway where it hasn’t moved for a few days) it’s currently around 2.4C! (outside temperature 2.2C)

So can I check please:

A) is the Wiki incorrect ? and its actually measuring in 0.01 (which would make the current van temperature about right) , or

B) Is it actually measuring the Router CPU temperature? not the ambient enclosure temperature ? for which 24 C could be a reasonable figure ? but my gut feel is a little low ?

Many thanks in advance

Regards

BB

[bigbloke]

Also - a bit of a pedantic observation perhaps ? - but the modbus RSSI is stated in the wiki as being in dBm whereas its actually in -dBm (minus dBm)

an actual RSSI of +78 dBm (if my maths is correct) represents an RF signal level of 63KW which I fear, would destroy the front end of the Modem !

regards

BB

[Matas]

Hello,

@bigbloke

is the Wiki incorrect ? and its actually measuring in 0.01 (which would make the current van temperature about right) , or

The Wiki is correct, it is measured in 0.1 celsius

@bigbloke

Is it actually measuring the Router CPU temperature? not the ambient enclosure temperature ? for which 24 C could be a reasonable figure ? but my gut feel is a little low ?

It is measuring the temperature of the mobile module that is on the PCB of the device, 24C is reasonable, mine, for example, is 44 celsius on idle.

@bigbloke

Also - a bit of a pedantic observation perhaps ? - but the modbus RSSI is stated in the wiki as being in dBm whereas its actually in -dBm (minus dBm)

an actual RSSI of +78 dBm (if my maths is correct) represents an RF signal level of 63KW which I fear, would destroy the front end of the Modem !

Not sure I understood this one right, but everywhere I looked, the values themselves have a “-” in front of them, where as the measuring unit “dBm” does not, due to the fact that the number already has the negative sign.

Regards,
M.

[bigbloke]

Many thanks for the clarification Matas, I have re-labelled and re-scaled the outputs in home assistant to give good values

Reference the RSSI value - my bad - I should have made it clearer and in honesty, my observation was a little “tongue in cheek” .

the wiki states that the unit of measurement is dBm

but the value returned to Home Assistant from the X11 was a positive value of “78” not “-78”.

-78 dBm is a valid signal level (I would expect to see around -45dBm if I placed the X11 antenna against the base station transmitter housing)

but +78dBm I calculated to be an RF signal of about 63KW !

Regards

BB

[Matas]

Ah, I see, thanks for clarifying. It’s weird, since on the WebUI, under Status → Network → Mobile the signal values shown are okay (by okay, I mean that they’re shown with a “-” in front of them).

Regards,
M.