SKU: DRFC-2179
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Generic 3DR Radio Telemetry 500mW Kit - 915MHz

₹7,059.00 (Inclusive of all taxes)
Out of Stock

This 915MHz 500mW telemetry kit provides a full-duplex MAVLink serial link for connecting flight controllers to ground station software like Mission Planner, enabling real-time telemetry, mission planning, and live flight data monitoring for UAVs.

Features

  • 500mW adjustable output power on the 915MHz ISM band for extended telemetry range.
  • Full-duplex communication using adaptive Time-Division Multiplexing (TDM) for reliable bidirectional data flow.
  • Based on the HM-TRP module with Si1000 microcontroller and Si4432 RF IC, running open-source SIK firmware.
  • Features both Micro-USB and UART interfaces, allowing connection to computers via OTG or direct serial links to flight controllers.
  • Configurable via AT commands and fully compatible with MAVLink-based ground control stations like Mission Planner and APM Planner.

Out of stock

Description

This telemetry kit utilizes two interchangeable transceiver modules, eliminating the traditional air/ground designation. Each module can function as either end of the link, providing flexibility in system setup. The core HM-TRP modules employ a Si1000 8051 microcontroller paired with a Si4432 wireless transceiver, delivering robust 500mW output power on the 915MHz frequency band with Frequency-Hopping Spread Spectrum (FHSS) and Listen-Before-Talk (LBT) protocols for interference resilience.

The system establishes a transparent serial tunnel, framing MAVLink protocol data for transmission. It supports advanced features like configurable duty cycles and built-in forward error correction, capable of correcting up to 25% data bit errors. This makes it suitable for demanding FPV and autonomous drone applications where reliable telemetry for GPS position, battery voltage, artificial horizon, and waypoint navigation is critical.

Key Features

  • High-Power RF Link: 500mW maximum output power (adjustable) on the 915MHz band provides a robust and extended-range telemetry connection.
  • Full-Duplex Adaptive TDM: Enables simultaneous two-way data transmission through self-adapting time-division multiplexing for efficient bandwidth use.
  • Open-Source Firmware: Runs custom, open-source SIK firmware on the HM-TRP module, allowing for community-driven updates and customization.
  • Dual Interface Connectivity: Equipped with both a Micro-USB port (for direct computer connection) and a 6-pin Molex UART connector for seamless integration with flight controller telemetry ports.
  • Interference Mitigation: Utilizes Frequency-Hopping Spread Spectrum (FHSS) and supports Listen-Before-Talk (LBT) & Adaptive Frequency Agility (AFA) to maintain link integrity in noisy RF environments.
  • Error Correction: Features built-in forward error-correcting code capable of correcting data streams with up to 25% bit error rate, enhancing data reliability.
  • MAVLink Protocol Native: Designed specifically for framing and transmitting the MAVLink protocol, the standard for UAV communication with ground control software.
  • Configurable Operation: Fully configurable via AT commands over serial, allowing adjustment of power, frequency, and data rate settings to suit specific application needs.

Applications

  • Long-range telemetry for fixed-wing UAVs and autonomous multirotors running ArduPilot or PX4 flight stacks.
  • Real-time mission planning and live data monitoring (GPS, voltage, attitude) in ground control stations like Mission Planner.
  • Providing a wireless serial bridge for DIY robotics and RC projects requiring robust bidirectional data links.
  • Enabling joystick-controlled computer-assisted flight (CAF) for testing and development of autonomous vehicle algorithms.

Technical Specifications

Item TypeKit
Frequency Band915 MHz
RF Output Power500 mW (adjustable)
Communication ProtocolMAVLink
Wireless TechnologyFrequency-Hopping Spread Spectrum (FHSS)
MicrocontrollerSi1000 8051
Wireless ModuleSi4432
Supported FeaturesLBT (Listen-Before-Talk) and AFA (Adaptive Frequency Agility)
InterfaceMicro-USB, UART (6-pin Molex)
Antenna ConnectorSMA
FirmwareOpen-Source SIK
Configuration SoftwareMission Planner, APM Planner
Communication ModeFull-Duplex, Adaptive TDM
Error CorrectionUp to 25% data bit error correction

Frequently Asked Questions

What flight controller software is this 915MHz telemetry kit compatible with?

This kit is natively compatible with all MAVLink-based flight controller firmware, primarily ArduPilot (APM) and PX4. It is designed to work seamlessly with associated ground control stations (GCS) like Mission Planner, QGroundControl, and APM Planner for real-time telemetry, parameter adjustment, and mission planning.

Can both modules in the kit be used interchangeably as air or ground units?

Yes, a key feature of this V2 kit is that both transceiver modules are identical and fully interchangeable. There is no dedicated 'air' or 'ground' unit; either module can be connected to the flight controller (via UART) or to a computer (via Micro-USB), providing maximum setup flexibility.

What is the maximum range I can expect from this 500mW telemetry system?

Range is highly dependent on antenna selection, placement, and local RF environment. With the included 2.5dBi antennas and in an open area with clear line-of-sight, a reliable telemetry link of several kilometers is achievable. For extended range, higher-gain antennas can be used on the SMA connectors.

How do I configure the radio settings, such as output power or frequency?

Configuration is performed via AT commands sent over the serial (UART) or USB connection. You can use a terminal program or the built-in configuration tools in ground control software like Mission Planner to adjust parameters like RF power, frequency hopping channels, and data rates.

Package Includes

  • 2 x Telemetry Module (Interchangeable)
  • 2 x 2.5dBi Antenna (SMA)
  • 1 x Micro USB OTG Cable
  • 1 x Set of Connection Cables (for UART)

Additional Information

Weight 0.064 kg
Dimensions 25 × 7 × 2 cm