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  1. #1
    RC Racer
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    Link Firmware Update Provides RPM/Speed Readings???

    When I turned Traxxas Link on the other day it stated I needed to update the Firmware in the Transmitter/Receiver so I did the update. The next time I powered up the X-Maxx and Link I noticed I was getting readings on both RPM and Speed. I have not verified the accuracy of the readings. Plus, I never installed the hardware to get RPM/Speed readings. Has anyone else experienced this?

  2. #2
    RC Champion fourdub's Avatar
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    Hello,

    The vxl 8s esc, has built in telemetry.

    In the settings of ur app in the garage you can pick ur gears and tire sizes. It estimates ur rpm and speed off that.

    Hope this helps!
    Sla2hvxl,pe4evxl,erevobl
    "Richard Chilson"youtube

  3. #3
    RC Racer
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    fourdub: yes it has telemetry but according to the Traxxas website the 8s ESC can only provide Motor Temperature and BEC Voltage, not RPM/Speed. In addition you need to install a battery Voltage tap to get battery voltage.

  4. #4
    RC Champion fourdub's Avatar
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    What?

    Traxxss.com says no extras needed.

    https://traxxas.com/products/parts/escs/vxl8s

    Check it out.
    Sla2hvxl,pe4evxl,erevobl
    "Richard Chilson"youtube

  5. #5
    RC Racer
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    I see your point fourdub but why does the X-Maxx "Feature List" say "BEC Voltage and Motor Temperature Sensor installed". It makes no mention of Battery Voltage or RPM/Speed. I asked Traxxas Support for a response.

  6. #6
    RC Champion fourdub's Avatar
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    ahh i see...i think....

    Quote Originally Posted by 06redssr View Post
    I see your point fourdub but why does the X-Maxx "Feature List" say "BEC Voltage and Motor Temperature Sensor installed".
    Because it comes with those sensors installed......



    Quote Originally Posted by 06redssr View Post
    It makes no mention of Battery Voltage or RPM/Speed. I asked Traxxas Support for a response.
    that is a "new" update, and the telemetry is built into the ESC no need for additional "Sensors"

    While truck is connected check your app and it will say "WHERE or WHAT" is giving you the read out.

    It shouldl say ESC, ESC. ESC. Receiver. Receiver lol





    Again speed is just a calculation!



    Not everyone has the firmware updates, so naturally they wont update the features list, until it comes on the truck.

    Some people are stuck and cannot get the update who want it. They only get the voltage and motor temp.

    Hope this helps you!
    Sla2hvxl,pe4evxl,erevobl
    "Richard Chilson"youtube

  7. #7
    RC Champion fourdub's Avatar
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    to be clearer, this feature/upgrade is only aviliable to users who purchase the Bluetooth module. (or borrow one from a friend hehe) (and even then, it can sometimes glitch and not see the update aka stuck people i mentioned)

    edit x2... when source says receiver, its reading you the telemetry sensors.

    p.s. Not talking smack, just trying to break down the issue for ya.
    Last edited by fourdub; 04-12-2018 at 01:01 AM.
    Sla2hvxl,pe4evxl,erevobl
    "Richard Chilson"youtube

  8. #8
    RC Turnbuckle Jr. danielhr77's Avatar
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    So, it has RPM enabled? Still not clear to me. If so, how without an RPM sensor?
    He Who Dies With the Most Toys Wins.

  9. #9
    RC Champion fourdub's Avatar
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    its an estimate.... the speed control estimates how fast its spinning the motor.
    Sla2hvxl,pe4evxl,erevobl
    "Richard Chilson"youtube

  10. #10
    RC Champion fourdub's Avatar
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    this guy was tripped out as well and contact traxxas... hehe

    Sla2hvxl,pe4evxl,erevobl
    "Richard Chilson"youtube

  11. #11
    RC Racer
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    Ok, the latest from Traxxas Support is "The VXL-8s provides RPM data now" so it appears it's a new feature. That's great!! They did not explain how it's done but I agree with fourdub that it's probably an estimate of motor rpm. And once you have RPM data the Speed can be determined mathematically using gear ratios and tire size. I plan to test the accuracy of the Speed compared to my GPS device in the near future. Guys, thanks for your responses!

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