SIYI MK15 Air Unit | MK32 HM30 Air Unit Video Receiver
Brand: SIYI. These high-performance digital video receivers (Air Units) are designed for professional pilots and FPV enthusiasts who value stable telemetry, extensive connectivity, and compact size. The kit includes MK32 / HM30 Air Unit and MK15 Air Unit models with a full set of interfaces for integration with a flight controller and peripherals. Category: Drones & Quadcopters > Drone Components > Drone Parts > Transmitters
Key Differences and Shared Features
Both models provide output signals: 16 S.BUS channels and 5 PWM channels, allowing connection of multi-channel control systems. The devices have an Ethernet input for digital video, a Type-C port for firmware updates, and a set of connectors for working with various controllers.
| Specifications | MK32 / HM30 Air Unit | MK15 Air Unit |
|---|---|---|
| Output Signal | 16 S.BUS channels, 5 PWM channels | 16 S.BUS channels, 5 PWM channels |
| Interface & Ports | ||
| – SBUS | 3-pin | 3-pin |
| – Datalink (to FC) | UART 4-pin | UART 4-pin |
| – PWM Channel 1 to 5 | 6-pin | 6-pin |
| – Video Input | Ethernet 8-pin | Ethernet 8-pin |
| – Firmware Update | Type-C | Type-C |
| Dimensions (without antenna, with fan) | 70 x 55 x 16 mm | 70 x 55 x 16 mm |
| Weight (without antenna) | 74 g | 100 g |
| Antenna Gain (standard omni) | 5 dBi | 5 dBi |
| Power Input | 11 to 16.8 V (expandable to 4S to 18S with BEC) | 14.8 to 58.8 V (4S to 14S) |
| Operating Temperature | -10 to 50°C | -10 to 55°C |
Connection Details
The interfaces of these Air Units are organized to ensure simple and quick integration into an existing system. You will receive all necessary connectors for connecting the main components:
- SBUS: 3-pin connector for channel output.
- Datalink (to FC): UART 4-pin for telemetry and control transmission.
- PWM Channels 1–5: 6-pin connector for servos or additional channels.
- Video Input: Ethernet 8-pin for stable digital video signal.
- Firmware Update: via Type-C port — fast and convenient.
The module dimensions are 70 x 55 x 16 mm (without antenna, with fan), making them suitable for most FPV frames. Weight varies by model: MK32 / HM30 — approximately 74 g, and MK15 — approximately 100 g (without antenna). The standard omni-antenna has a gain of 5 dBi, ensuring reliable signal reception within the typical operating range.
Input voltage ranges: for MK32 / HM30 — 11 to 16.8 V with the possibility of expansion to 4S–18S using BEC; for MK15 — 14.8 to 58.8 V (4S–14S), which makes the MK15 suitable for heavier platforms with a wide power range. Operating temperature ranges allow the modules to be used in various climatic conditions: MK32 / HM30 from -10 to 50°C, MK15 from -10 to 55°C.
Who It's For
The SIYI MK32 / HM30 and MK15 Air Units are suitable for both amateur builds and professional applications: racing drones, heavy multicopters, and projects where digital video transmission, multi-channel interaction with the flight controller, and stable power are important. The choice between models depends on weight and power range requirements: for lightweight racing frames, MK32 / HM30 is preferable (lower weight), while MK15 is more versatile for platforms with higher voltage needs.
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