HD-C16L asynchronous LED multimedia controller
The Huidu C16L integrates a playback terminal, sending card and receiving card for commercial LED displays, including light-pole, storefront and vehicle screens. Its onboard receiving function connects to LED modules, while the Gigabit output supports cascading to HD-R series receiving cards.
For loading calculations, distinguish 200,000 pixels on a single card from 650,000 pixels in a cascade. These values are stated in the HD-C16L V1.0 specification.
HD-C16L specifications
| Parameter | Specification |
|---|---|
| Single-card loading | 200,000 pixels |
| Cascaded loading | Up to 650,000 pixels |
| Maximum width | 8192 pixels; the manual specifies a capacity reduction when width exceeds 1920 pixels |
| Module connections | 12 onboard HUB75E interfaces |
| Receiving-card output | 1 × Gigabit Ethernet; supports HD-R series receiving cards |
| Program communication | 1 × 100M Ethernet port; 1 × USB interface for updates and expansion |
| Wi-Fi | Standard 2.4 GHz; Wi-Fi AP and STA modes |
| Video windows | 2 windows; up to 2 channels of 1080p |
| Frame-rate output | 60 Hz |
| Audio | 1 × TRS 3.5 mm two-channel output |
| Sensors | Dedicated temperature interface, dedicated GPS interface and one universal sensor input |
| Relay | 1 onboard channel for remote power control |
| Serial communication | UART; one RS-232 or RS-485 channel optional |
| Mobile and cloud management | LedArt; XiaoHui Cloud, with optional 4G connectivity |
The V1.0 English manual gives an additional 1920-pixel dimension limit without clearly naming the dimension. Confirm the required height and reduced loading for wide layouts before configuring a screen; the maximum width is not an unrestricted 8192-pixel-wide loading guarantee.
Content updates and remote management
Use the 100M communication port for parameter setup, program transfers and Internet access, or update programs through USB. Standard Wi-Fi supports wireless management with the LedArt app. Optional 4G provides an Internet connection for XiaoHui Cloud remote management.
Playback content includes video, pictures, GIF animation, text, WPS documents, tables, clocks and timed programs. The card also supports external environmental sensors and remote power control through its onboard relay.
Download specification
HD-C16L specification V1.0 PDF
Frequently Asked Questions
How many pixels can the Huidu C16L control?
The V1.0 specification states 200,000 pixels on one card and up to 650,000 pixels when cascaded. Widths above 1920 pixels are subject to a loading reduction.
Does C16L need a separate receiving card?
It has an onboard receiving function and 12 HUB75E interfaces for direct module connections. Its Gigabit output can also cascade to HD-R series receiving cards.
Does HD-C16L include Wi-Fi and 4G?
2.4 GHz Wi-Fi is standard, with AP and STA modes. 4G connectivity is optional.
Can C16L play two videos at once?
The specification supports two video windows, up to two channels of 1080p. This playback capability does not increase the LED screen loading limit.
Which app controls C16L?
The manual names LedArt for wireless mobile control and XiaoHui Cloud for remote Internet management.




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