> For the complete documentation index, see [llms.txt](https://docs.arkelectron.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.arkelectron.com/products/electronic-speed-controller/ark-4in1-esc.md).

# ARK 4IN1 ESC

NDAA compliant, made in the USA, 4 in 1 electronic speed controller running open source ARK32 firmware.

The ARK 4IN1 ESC drives four brushless motors from a 3S–8S pack, with four STM32F051 MCUs, one per motor channel, and [TI DRV8328](https://www.ti.com/product/DRV8328) gate drivers. It runs [ARK32](https://github.com/ARK-Electronics/ARK32), ARK's open source fork of AM32, configured with the [ARK32 Configurator](https://ark32.arkelectron.com/), and takes DShot or PWM from PX4, ArduPilot and Betaflight flight controllers. USA built, NDAA compliant and [Blue Framework listed](https://tyrionprod.servicenowservices.com/gsp?id=framework_list).

Buy: [ARK 4IN1 ESC](https://arkelectron.com/product/ark-4in1-esc/) · [ARK 4IN1 ESC CONS](https://arkelectron.com/product/ark-4in1-esc-cons/)

| Variant           | Motor and battery connections                          | Current per motor                                  | Weight |
| ----------------- | ------------------------------------------------------ | -------------------------------------------------- | ------ |
| ARK 4IN1 ESC      | Solder                                                 | 50 A continuous, 75 A burst                        | 14.5 g |
| ARK 4IN1 ESC CONS | MR30 motor connectors, M2.5 threaded battery standoffs | 30 A continuous, 40 A burst (MR30 connector limit) | 24.0 g |

| Page                                                                                                                  | Contents                                                                |
| --------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------- |
| [Firmware](/products/electronic-speed-controller/ark-4in1-esc/firmware.md)                                            | ARK32, updating, downloads, default settings, ramp rate for large props |
| [ARK32 Configuration](/products/electronic-speed-controller/ark-4in1-esc/firmware/ark32-configuration.md)             | Setting KV, pole count and ramp rate before first use                   |
| [Ardupilot ESC Passthrough](/products/electronic-speed-controller/ark-4in1-esc/firmware/ardupilot-esc-passthrough.md) | ArduPilot parameters for DShot and ESC passthrough                      |
| [Flash ARK32](/products/electronic-speed-controller/ark-4in1-esc/firmware/flash-ark32.md)                             | Flashing ARK32 with the ARK32 Configurator                              |
| [Flash Bootloader](/products/electronic-speed-controller/ark-4in1-esc/firmware/flash-bootloader.md)                   | Bootloader update, factory image and SWD recovery                       |
| [Hardware Reference](/products/electronic-speed-controller/ark-4in1-esc/hardware.md)                                  | Specifications, pinout, capacitance, datasheets, 3D model               |
| [Motor Spin Direction](/products/electronic-speed-controller/ark-4in1-esc/motor-spin-direction.md)                    | Reversing motors with DShot in PX4 and Betaflight                       |
| [PWM Calibration](/products/electronic-speed-controller/ark-4in1-esc/pwm-calibration.md)                              | Calibrating the PWM input range                                         |


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