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Brain2 + Spektrum (SRLX2) Telemetry values


tomas
(@tomas)
Active Member Customer
Joined: 1 year ago
Posts: 5
Topic starter  

Hi,

I am running Bain2 with SPM4651T paired with OpenTX.
The ESC is HW 150A V5.

Everything works correctly, and I am getting telemetry properly in OpenTX.

My question is - is there any documentation on what the various sensors are?
There are obvious things (like TRSS, Erpm, EVIN and many others), but there are many sensors which I have no idea what they do.

In particular, I don't see anything that would resemble RSSI (TRSS is however present with sensor ID 1).

Any chance you could point me to some document that further specifies what each sensor is?
I want this to be able to setup alarms based on telemetry.

Thanks!


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BrainDev
(@customercare)
Member Admin
Joined: 4 years ago
Posts: 792
 

Hello, you wrote that you use a 4651T receiver which is a Spektrum receiver with SRXL2 protocol but then you say that you are using an OpenTX transmitter which normally uses receivers with S.Bus + Smart.Port radio and telemetry protocols. We can therefore assume that you are using a transmitter with an external or internal multi-protocol radio module. We would therefore need to know: what brand and model of transmitter are you using? What brand and model of multiprotocol module are you using? What version of OpenTX are you using? How did you set the radio protocol in the transmitter with which you binded the transmitter to the 4651T receiver? What firmware version of the 4651T are you using?

Thanks


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tomas
(@tomas)
Active Member Customer
Joined: 1 year ago
Posts: 5
Topic starter  

Yes, using the RadioMaster TX16S with an internal multi-protocol module. Using OpenTX 2.3.15.

It's setup in DSM X2F mode at 11ms.

Like I mentioned in the original post, everything works properly - telemetry works too.
I just want to know what all the telemetry values actually mean.


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BrainDev
(@customercare)
Member Admin
Joined: 4 years ago
Posts: 792
 

When a receiver using a telemetry protocol other than Smart.Port, F.Port, F.Port2, F.BUS is used on a transmitter with an OpenTX (or EdgeTX) operating system that uses an RF Multiprotocol module, the transmitter's operating system cannot recognize which telemetry values are being transmitted. Therefore, by automatic search the transmitter activates all those that the selected receiver's telemetry protocol could send to the transmitter regardless of whether the values are transmitted or not.

The telemetry sensors that depending on the type of receiver used are activated by OpenTX or EdgeTX operating systems with Multiprotocol radio module should be listed in the documentation of the version of OpenTX or EdgeTX used or in the documentation of the type of Multiprotocol radio module used.

The flight controllers have little to do with it because they use the telemetry protocol of the connected receivers without being able to know in any way whether the type and brand of transmitter used corresponds to that normally expected for the receiver used or whether it is an OpenTX / EdgeTX transmitter with Multiprotocol module.

However, from tests with RadioMaster TX16S transmitter with SO EdgeTX 2.7.1, internal multiprotocol module with FW 1.3.3.7 and 4651T SRXL2 receiver with firmware 2.44.0 and HobbyWing Platinum 150A V5 ESC, we have seen:

immagine

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tomas
(@tomas)
Active Member Customer
Joined: 1 year ago
Posts: 5
Topic starter  
Posted by: @customercare

by automatic search the transmitter activates all those that the selected receiver's telemetry protocol could send to the transmitter regardless of whether the values are transmitted or not

This is useful and explains why I see multiple empty values in telemetry, thank you.

Posted by: @customercare

The flight controllers have little to do with it because they use the telemetry protocol of the connected receivers without being able to know in any way whether the type and brand of transmitter used corresponds to that normally expected for the receiver used or whether it is an OpenTX / EdgeTX transmitter with Multiprotocol module.

Got it - so Brain just injects some values to the RX using SRLX2, the RX adds other telemetry values I assume, and then sends everything to the TX by DSM X.

TRSS is calculated by the TX itself I assume.

Posted by: @customercare

However, from tests with RadioMaster TX16S transmitter with SO EdgeTX 2.7.1, internal multiprotocol module with FW 1.3.3.7 and 4651T SRXL2 receiver with firmware 2.44.0 and HobbyWing Platinum 150A V5 ESC, we have seen:

Yes, all of these I have configured alarms and monitoring on, as well as some others too. I am still missing a few I would like (like RSSI).

 

So I guess my final question is - do you know where I could find some documentation on what all the possible telemetry values in DSM X are?


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BrainDev
(@customercare)
Member Admin
Joined: 4 years ago
Posts: 792
 

In the documentation regarding the telemetry of our flight control units that you can find in the MANUALS section of all our applications (Windows, Android, iOS) or that you can download from the Downloads section of our website and that we attach below for your convenience, on page 6 regarding the telemetry values transmitted by Spektrum telemetry receivers to Spektrum transmitters you will find a table listing all the telemetry parameters that our flight control units send to Spektrum telemetry receivers and visible on the screen of telemetric Spektrum transmitters.


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