3DRobotics 433MHz V1 500mW Flight Controller Radio Telemetry Kit – SiK Firmware, MAVLink, and FHSS Bidirectional Telemetry for APM, PX4, and Pixhawk UAV Ground Station Communication
The 3DRobotics 433MHz V1 500mW Flight Controller Radio Telemetry Kit is the first-generation 433MHz telemetry radio pair from 3DRobotics, providing a 2-way half-duplex wireless data link between APM, PX4, and Pixhawk flight controllers and a ground-side mission planning station running APM Mission Planner or compatible MAVLink-based GCS software. Operating on the 433MHz ISM band, this V1 kit is the appropriate telemetry selection for regions where 433MHz is the designated licence-free sub-GHz data link frequency, covering Europe, large parts of Asia, and other regulatory zones where 915MHz ISM band operation is restricted or unavailable. The V1 designation identifies this as the original hardware revision in the 3DR 433MHz telemetry line, sharing the core SiK open-source firmware platform, MAVLink protocol framing, frequency hopping spread spectrum, and adaptive time division multiplexing architecture that defines the 3DR telemetry radio family across all variants and frequency bands.
The kit pairs an air-side radio module for flight controller TTL UART connection with a ground-side radio for laptop or ground station integration, both pre-configured for direct connection to APM, PX4, and Pixhawk hardware without manual baud rate or protocol setup. The SiK firmware running on both units supports AT command-based local configuration and RT command-based remote configuration of the air-side unit from the ground station, allowing power output, air data rate, duty cycle, and frequency hopping parameters to be adjusted without physical access to the UAV. The built-in error correcting code recovers up to 25% data bit errors without retransmission, improving link reliability under marginal signal and interference conditions typical of 433MHz shared-band UAV operations. As a V1 hardware revision, this kit is well-suited for builders and operators establishing a proven, community-supported 433MHz MAVLink telemetry link on APM and Pixhawk platforms, where the V1 hardware generation is the preferred or required variant for compatibility with existing ground station hardware and software configurations.
Key Features

Frequency: 433MHz ISM band for UAV telemetry in European, Asian, and other regions where 433MHz is the designated licence-free sub-GHz data link band
Hardware Revision: V1 first-generation 3DR 433MHz telemetry radio hardware, compatible with SiK firmware and APM Mission Planner configuration
Transmit Power: Up to 500mW output for extended open-field UAV ground station communication range
2-Way Half-Duplex: Bidirectional wireless communication between air-side TTL UART serial radio and ground-side radio unit
Transparent Serial Link: Passes MAVLink telemetry packets without protocol conversion for direct APM Mission Planner and MAVLink GCS compatibility
Air Data Rate: Up to 250kbps for real-time telemetry, parameter transfer, and MAVLink status message exchange
MAVLink Protocol Framing: Native MAVLink framing and status reporting for direct APM, PX4, and Pixhawk telemetry stream compatibility
Frequency Hopping Spread Spectrum: FHSS improves RF interference resilience and co-channel contention resistance on shared 433MHz spectrum
Adaptive Time Division Multiplexing: TDM optimises bidirectional channel sharing between air and ground radios under varying link conditions
LBT and AFA Support: Listen Before Talk and Adaptive Frequency Agility reduce RF collision probability on shared 433MHz band
Error Correcting Code: Built-in ECC recovers up to 25% data bit errors without retransmission for reliable telemetry under marginal link conditions
Configurable Duty Cycle: Adjustable transmission duty cycle for regulatory compliance and co-existence with other 433MHz systems
AT and RT Command Support: AT commands for local radio configuration and RT commands for remote air-side radio configuration from the ground station
SiK Open-Source Firmware: Community-developed SiK firmware with a bootloader supporting over-the-serial-interface firmware upgrades and APM Mission Planner configuration
Pre-Configured: Factory pre-set baud rate and protocol for direct APM, PX4, and Pixhawk flight controller connection without manual initialization
Flight Controller Compatibility: Direct compatibility with APM, PX4, and Pixhawk flight controller telemetry port pinout and MAVLink data stream

Applications

APM, PX4, and Pixhawk flight controller real-time telemetry and parameter monitoring in 433MHz-regulated regions via APM Mission Planner or compatible GCS
European and Asian UAV operations requiring V1 3DR 433MHz telemetry radio compatibility with existing ground station hardware and software
In-flight PID tuning, waypoint management, and MAVLink status monitoring over a 433MHz wireless link without landing the UAV
Fixed-wing and multirotor UAV ground station communication requiring plug-and-play pre-configured 433MHz MAVLink telemetry
MAVLink-based autopilot builds requiring transparent serial telemetry with native MAVLink framing on the 433MHz ISM band
UAV range extension builds, replacing stock antennas with higher-gain RP-SMA directional or omnidirectional alternatives for beyond-standard-range telemetry

Package List:

1×433 RADIO telemetry base station(USB connection)
2x500mw Radio Telemetry
1xCable set
2xAntenna