Best Drone Radio Transmitter and Receiver Module for video data telemetry

The Vcan2122 is a compact, medium-power bidirectional wireless data transmission module designed for reliable long-range communication in complex and interference-prone environments. Based on OFDM TDD wireless communication technology, it delivers strong anti-interference capability, excellent penetration performance, and highly stable data transmission.

The module supports multiple transmission modes, including point-to-point, point-to-multipoint, and trunk communication, and enables star network topologies with up to 16 nodes in a single network. Thanks to its miniaturized design, low power consumption, and multiple data interfaces, Vcan2122 is well suited for mobile, airborne, and embedded applications where reliability and flexibility are critical.

The Vcan2122 is by default available in a wideband configuration, operating over a frequency range of 1420–1530 MHz. Within this single continuous band, the module provides up to 110 MHz of selectable frequency range, enabling automatic frequency hopping with significantly greater flexibility to avoid interference and maintain stable links in complex RF environments.

In addition to the wideband version, optional single-band variants are also available in the following frequency ranges: 806–825.9 MHz, 1427.9–1467.9 MHz, 2401.5–2481.4 MHz. Each optional variant supports single-band operation only.

Under good line-of-sight (LOS) air-to-ground conditions, the transmission distance can reach 10-20 km or more, depending on high gain antenna configuration and external power amplifier support.

Features

• Star Networking Capability
  Supports point-to-multipoint communication with up to 16 nodes.

• High Bandwidth Transmission
  Maximum data rate up to 30 Mbps @ 20 MHz.

• Flexible Channel Bandwidth
  Supports 3 / 5 / 10 / 20 MHz bandwidth modes.

• Automatic Frequency Selection
  Automatically detects interference and selects the optimal frequency point in real time.

• Multi-System Coexistence
  Multiple Vcan2122 systems can operate simultaneously on fixed frequencies.

• Multiple Data Interfaces
  Integrated dual 100 Mbps Ethernet ports and TTL / RS232 / SBUS serial interfaces.

• Low Latency
  End-to-end transmission delay ≤ 20 ms.

• Secure Communication
  Supports AES-128 encryption.

• Compact & Lightweight Design
  Only 35 g, suitable for UAVs and other weight-sensitive platforms.

• Web UI page to configuration the parameter.
  Provide a user-friendly web UI for configuring module parameters. Users can easily manage settings and modify parameters visually through the web page, without the need for complex AT commands or command-line instructions.

Specifications

System Parameters

Channel Bandwidth & Sensitivity

Interfaces

• Power Interface: XT30, DC 9–15 V

• Antenna Interface: IPEX ×2

  • MAIN: Must be connected

  • AUX: Receive diversity only

• Data Interfaces:

  • Ethernet: 100 Mbps ×2

  • Serial: TTL ×2, RS232 ×1, SBUS ×1

Interface definition

We can also convert one TTL port to RS422, and additionally, we can add an RS232-to-RS485 converter board to support RS485, which is commonly used for camera PTZ control.

Status Indicators

• PWR (Green)
  ON indicates the device is powered.

• MODE (Red / Green)

  • Red ON: Master mode (Grount Unit, Receiver)

  • Green ON: Slave mode (Air Unit, Transmitter)

• LAN1 / LAN2 (Green)
  Blinks when Ethernet data is transmitted or received.

• RSSI 1–3 (Green)
  Indicates received signal quality:

  • 3 LEDs ON: SNR > 14

  • 2 LEDs ON: 10 < SNR < 14

  • 1 LED ON: 2 < SNR < 10

When the primary (Master, Ground Unit, Receiver) and secondary devices (Salve, Air Unit, Transmitter) are not synchronized, the PWR (power) indicators on both devices remain steadily lit. The MODE indicator is red on the primary device and green on the secondary device. At this time, the RSSI lights on both devices are in a searching state.

Once the master and slave devices are synchronized, the RSSI lights display the received signal strength for each device. When data is being sent or received over the network, the LAN1 indicators on both devices light up, while the LAN2 indicators blink to indicate network activity.

Applications

The Vcan2122 is suitable for a wide range of professional wireless data transmission applications, including:

• UAV / Drone Data Links

• Firefighting & Emergency Communication

• Public Security & Law Enforcement

• Inspection & Monitoring Systems

• Robotics & UGVs

• Temporary Wireless Networks

• Industrial and Environmental Monitoring

FAQ

Q: Does Vcan2122 support video transmission?
Vcan2122 is a wireless data transmission module. Video transmission depends on external IP cameras or video encoders connected via Ethernet.

Q: Can this module support IP MESH MANET functionality?
No, default module is star networking type. If you need, we also can do IP MESH MANET (Mobile Ad Hoc Network) fucntion (use CX6702, CX6702 module). Currently, we provide it as a finished product rather than as a standalone development module. Please refer to the product image below for your reference. (CX6779-L4H2)

Q: Can multiple Vcan2122 systems operate in the same area?
Yes. Fixed-frequency operation allows multiple systems to coexist with minimal interference.

Q: Does one unit support multiple frequency bands?
No. Each Vcan2122 unit supports one single frequency band only.

Q: Is diversity reception supported?
Yes. The AUX antenna provides receive diversity to improve link reliability.

Q: What is the typical latency?
The typical end-to-end transmission delay is ≤20 ms.