# Extending and API's

- [Gauges and Extensions](/extending-and-apis/gauges-and-extensions.md): SPAD.neXt generally supports ESP compatible gauges
- [SPAD Gauges: GaugeSettings](/extending-and-apis/gauges-and-extensions/spad-gauges-gaugesettings.md)
- [C# Scripting Interface](/extending-and-apis/scripting-interface.md)
- [C# Scripting: ScriptStub](/extending-and-apis/scripting-interface/c-scripting-scriptstub.md)
- [C# Scripting: Provide Values](/extending-and-apis/scripting-interface/c-scripting-provide-values.md): Scripting reference implementation for providing Values to SPAD.neXt
- [C# Scripting: PreCompile](/extending-and-apis/scripting-interface/c-scripting-precompile.md): Using precompiled Scripting Assemblies
- [Device Interface](/extending-and-apis/serial-connection.md): SPAD.neXt device interface V2
- [Device Communication Flow](/extending-and-apis/serial-connection/device-communication-flow.md)
- [Device INIT-Phase](/extending-and-apis/serial-connection/device-communication-flow/device-init-phase.md)
- [Device CONFIG-Phase](/extending-and-apis/serial-connection/device-communication-flow/device-config-phase.md)
- [Device options](/extending-and-apis/serial-connection/device-communication-flow/device-config-phase/device-options.md): Set device specific options
- [Device COLORSET configuration](/extending-and-apis/serial-connection/device-communication-flow/device-config-phase/device-colorset-configuration.md): Defining a custom colorset for LED
- [Device PROFILE configuration](/extending-and-apis/serial-connection/device-communication-flow/device-config-phase/device-profile-configuration.md): Device default profile configuration
- [Device OUTPUT Configuration](/extending-and-apis/serial-connection/device-communication-flow/device-config-phase/device-output-configuration.md): Define a device output descriptor (SPAD -> Device)
- [Device INPUT configuration](/extending-and-apis/serial-connection/device-communication-flow/device-config-phase/device-input-configuration.md): Define a device input (Device -> SPAD)
- [Device input AXIS](/extending-and-apis/serial-connection/device-communication-flow/device-config-phase/device-input-configuration/device-input-axis.md): Define a device axis
- [Device input ENCODER](/extending-and-apis/serial-connection/device-communication-flow/device-config-phase/device-input-configuration/device-input-encoder.md): Define a stateless encoder
- [Device input PUSHBUTTON](/extending-and-apis/serial-connection/device-communication-flow/device-config-phase/device-input-configuration/device-input-pushbutton.md): Stateless push button
- [Device input ROTARY](/extending-and-apis/serial-connection/device-communication-flow/device-config-phase/device-input-configuration/device-input-rotary.md): Define a stateful rotary switch
- [Device input SWITCH](/extending-and-apis/serial-connection/device-communication-flow/device-config-phase/device-input-configuration/device-input-switch.md): Define a stateful device switch
- [Device input SWITCH3](/extending-and-apis/serial-connection/device-communication-flow/device-config-phase/device-input-configuration/device-input-switch3.md): Define a stateful 3-Position (On1-Mid2-On0) switch
- [Device LABEL](/extending-and-apis/serial-connection/device-communication-flow/device-config-phase/device-input-configuration/device-label.md)
- [Device config: Advanced topics](/extending-and-apis/serial-connection/device-communication-flow/device-config-phase/device-config-advanced-topics.md): Add functionality to inputs and outputs
- [Device STATESCAN-Phase](/extending-and-apis/serial-connection/device-communication-flow/device-statescan-phase.md)
- [Device General Commands](/extending-and-apis/serial-connection/command-0.md): General Command ( SPAD.neXt <--> Device) on Channel 0
- [Device commands](/extending-and-apis/serial-connection/command-1.md): The 1-Command is used by the device to send commands to SPAD.neXt.
- [Page-Control](/extending-and-apis/serial-connection/command-1/page-control.md): Serial: Configuration (1) Page-Control
- [Device SPAD.neXt Events (2)](/extending-and-apis/serial-connection/command-2.md): SPAD.neXt raises internal events on Channel 2
- [Device Simulation Events (Channel 4)](/extending-and-apis/serial-connection/command-4.md)
- [Device Data (Channel 5)](/extending-and-apis/serial-connection/device-data-channel-5.md)
- [Device LED Update (Channel 6)](/extending-and-apis/serial-connection/device-led-update-channel-6.md): SPAD tells the device to change the status of a LED
- [Device Display Update (Channel 7)](/extending-and-apis/serial-connection/device-display-update-channel-7.md): Update device display
- [Device Input Updates (Channel 8)](/extending-and-apis/serial-connection/device-input-updates-channel-8.md)
- [Device Virtual Power](/extending-and-apis/serial-connection/virtual-power.md): Virtual Power Support for serial devices
- [Device Custom UI](/extending-and-apis/serial-connection/device-custom-ui.md): Providing a Custom UI for a device
- [Device HTML UI](/extending-and-apis/serial-connection/device-html-ui.md): Providing a custom HTML UI for the device
- [Device preconfigured definition](/extending-and-apis/serial-connection/device-preconfigured-definition.md)
- [Serial V2](/extending-and-apis/serial-connection/serial-v2.md)
- [Command 1,RAISE](/extending-and-apis/serial-connection/serial-v2/command-1-raise.md)
- [Command: 0,AUTH](/extending-and-apis/serial-connection/serial-v2/command-0-auth.md): Request 3rd Party Authentication of the Device
- [X-Plane Datarefs & Commands](/extending-and-apis/xplane-datarefs.md)
- [FSUIPC: Custom Offsets](/extending-and-apis/fsuipc-custom-offsets.md): Adding custom offset to FSUIPC Data
- [RestAPI](/extending-and-apis/restapi.md)
- [HTML Rendering API](/extending-and-apis/html-rendering-api.md)
- [Other API's](/extending-and-apis/other-apis.md)