M0138 protocol

[LV.Office Holder]

Hello,

We are interested in ESC 4in1 - M0138. We have a couple of questions regarding how to control it:

VOXL ESC FPV 4-in-1 with Built-in Power Module (MDK-M0138)5V - VOXL 2 / Board Only

High Performance 4-in-1 Electronic Speed Controller This high-performance ESC supports over 300A burst current using 100A MOSFETs per channel. Communicate reliably with low-latency digital UART from your flight controller to your 4-in-1 ESC. This ESC is designed, built and tested in the USA and is NDAA '20 Section 848

ModalAI, Inc. (www.modalai.com)

Please advise if it is possible to control it via PWM or only via UART
And what UART protocol is used?

Thanks!

Victor

[Alex Kushleyev]

Hello @LV-Office-Holder,

The M0138 racing ESC only has two I/O pins and they are used for aux PWM output. PWM input is disabled for this ESC due to lack of PWM input for each ESC channel.

The ESC protocol example can be found here : https://gitlab.com/voxl-public/support/esc-driver as well as part of PX4 implementation : https://github.com/modalai/px4-firmware/tree/voxl-dev/src/drivers/actuators/voxl_esc . I would suggest referencing the PX4 implementation since it has the latest updates.

Additionally, we have voxl-esc test tools (python) : https://gitlab.com/voxl-public/voxl-sdk/utilities/voxl-esc . The test tools allow you to spin motors, plot data, perform firmware and parameter updates.

Please let me know if you have any other questions.

Alex