I am interested in finding out the RPM of the motors on my drone with certain amounts of load and without load. Is there some way to measure the RPM of a drone motor using BetaFlight? If not, is there another way?

Not sure if it matters, but I am using the SucceX-E 45A 2-6S BLHeli_S Dshot600 4-in-1 ESC and some Xing-E 2207 2750kv motors.


1 Answer 1


Bi-directional DShot can help you here. After updating the BLHeli firmware on your BLHeli_32 ESCs to the latest version (support was added only recently) and the firmware on your flight controller to Betaflight >4.0 (PR on Github), you can go into the Betaflight Configurator app and enable Bi-directional DShot under the Configuration tab.

It must be said that the easy BLHeli ESC firmware upgrade is only available for BLHeli_32 ESCs. There are ways to get support for bi-directional DShot on BLHeli_S ESCs, but they're more complicated. Instructions are linked to on the Betaflight Wiki page.

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Motors tab in Betaflight Configurator

The ESC-reported motor RPM values will then be displayed under the R label next to each motor in the Motors tab.

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OSD Widget

There is also an OSD widget for viewing motor RPMs, called OSD_ESC_RPM in the code, which can be enabled under the OSD tab.


As @BenWilson points out in his comment on this answer, you can also set the BlackBox debug mode to DSHOT_RPM_TELEMETRY and get motor RPM values recorded in your BlackBox log The implementation is described on the Betaflight Wiki here.

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    $\begingroup$ In addition to this, you can set blackbox debug mode to DSHOT_RPM_TELEMETRY and get motor RPM values recorded in your blackbox log (I've never tried this, but it's mentioned here: github.com/betaflight/betaflight/wiki/Debug-Modes) $\endgroup$
    – Ben Wilson
    Commented May 14, 2020 at 12:50
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    $\begingroup$ @BenWilson That's a great point. $\endgroup$
    – ifconfig
    Commented May 14, 2020 at 16:09

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