# Knowledge Base

- [Knowledge Base](https://docs.arkelectron.com/knowledge-base/knowledge-base.md): Core concepts for working with ARK products, drone electronics, and embedded systems.
- [Common Jetson PAB Knowledge Base](https://docs.arkelectron.com/knowledge-base/knowledge-base/common-jetson-pab-knowledge-base.md)
- [ARK Services](https://docs.arkelectron.com/knowledge-base/knowledge-base/common-jetson-pab-knowledge-base/ark-services.md)
- [Services](https://docs.arkelectron.com/knowledge-base/knowledge-base/common-jetson-pab-knowledge-base/ark-services/services.md): This page explains the function of each ARK-OS service.
- [Updating the Flight Controller Firmware](https://docs.arkelectron.com/knowledge-base/knowledge-base/common-jetson-pab-knowledge-base/updating-the-flight-controller-firmware.md): The ARKV6X Flight Controller can be flashed with PX4 or Ardupilot.
- [Power Cycling USB Ports](https://docs.arkelectron.com/knowledge-base/knowledge-base/common-jetson-pab-knowledge-base/power-cycling-usb-ports.md)
- [USB Wi-Fi Adapters](https://docs.arkelectron.com/knowledge-base/knowledge-base/common-jetson-pab-knowledge-base/usb-wi-fi-adapters.md)
- [USB Bluetooth Adapters](https://docs.arkelectron.com/knowledge-base/knowledge-base/common-jetson-pab-knowledge-base/usb-bluetooth-adapters.md)
- [USB Cameras and GPS](https://docs.arkelectron.com/knowledge-base/knowledge-base/common-jetson-pab-knowledge-base/usb-cameras-and-gps.md)
- [Apt Upgrade Hold Back Risky Packages](https://docs.arkelectron.com/knowledge-base/knowledge-base/common-jetson-pab-knowledge-base/apt-upgrade-hold-back-risky-packages.md)
- [GPIO Control](https://docs.arkelectron.com/knowledge-base/knowledge-base/common-jetson-pab-knowledge-base/gpio-control.md)
- [Microcontrollers](https://docs.arkelectron.com/knowledge-base/knowledge-base/microcontrollers.md): What microcontrollers are, the STM32 family, firmware vs bootloaders, and the NuttX RTOS.
- [SWD Programming](https://docs.arkelectron.com/knowledge-base/knowledge-base/swd-programming.md): What SWD is, how it works, what hardware you need, and when to use it.
- [Serial Communication (UART)](https://docs.arkelectron.com/knowledge-base/knowledge-base/serial-communication-uart.md): UART basics, RX/TX cross-wiring, baud rates, and using the debug console.
- [CAN Bus](https://docs.arkelectron.com/knowledge-base/knowledge-base/can-bus.md): CAN bus fundamentals, differential signaling, termination, DroneCAN protocol, and 4-pin JST-GH wiring.
- [MAVLink](https://docs.arkelectron.com/knowledge-base/knowledge-base/mavlink.md): What MAVLink is, how ground stations and companion computers communicate with the flight controller, and MAVLink vs XRCE-DDS.
- [Connectors and Wiring](https://docs.arkelectron.com/knowledge-base/knowledge-base/connectors-and-wiring.md): JST-GH vs JST-SH connectors, wire color conventions, Pixhawk standard pinouts, and cable kits.
- [Power and Grounding](https://docs.arkelectron.com/knowledge-base/knowledge-base/power-and-grounding.md): Voltage levels, power distribution, ground loops, signal integrity, and noise avoidance on drones.
- [GPS Placement](https://docs.arkelectron.com/knowledge-base/knowledge-base/gps-placement.md): GPS module placement, interference sources, and mounting best practices for reliable satellite reception and compass accuracy.
- [Communication Buses (I2C, SPI)](https://docs.arkelectron.com/knowledge-base/knowledge-base/communication-buses.md): I2C and SPI basics, a comparison of UART vs I2C vs SPI vs CAN, and why CAN wins for drones.
- [Recommended Tools](https://docs.arkelectron.com/knowledge-base/knowledge-base/recommended-tools.md): Essential bench tools for building, debugging, and maintaining drone electronics.
- [ST-LINK Flashing Guide](https://docs.arkelectron.com/knowledge-base/knowledge-base/st-link-flashing-guide.md): Guide for using ST-LINK to flash firmware and access the debug console on ARK products.
- [DroneCAN GUI Tool Guide](https://docs.arkelectron.com/knowledge-base/knowledge-base/dronecan-gui-tool-guide.md): Guide for using the DroneCAN GUI Tool to configure, update firmware, and monitor ARK DroneCAN devices.
- [PX4 Log Encryption](https://docs.arkelectron.com/knowledge-base/knowledge-base/px4-log-encryption.md): This section guides you through setting up log encryption in PX4 on our flight controllers, and then explains how to access, decrypt, and view the encrypted logs.
- [PX4 Setup](https://docs.arkelectron.com/knowledge-base/knowledge-base/px4-setup.md)


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