# SiK Telemetry Radio V3
### **Overview**
This Holybro SiK Telemetry Radio is a small, light, and inexpensive open-source radio platform that typically allows ranges of better than 300m “out of the box” (the range can be extended to several kilometres with the use of a patch antenna on the ground).
This radio is plug-n-play, all Pixhawk Standard and other Flight Controller, providing the easiest way to set up a telemetry connection between your controller and a ground station. It uses open-source firmware that has been specially designed to work well with MAVLink packets and to be integrated with the Mission Planner, Ardupilot, QGroundControl, and PX4.
The radios can be either 915Mhz or 433 MHz, and you should purchase the model that is appropriate for your country/region.
### **Features**
* Open-source SIK firmware
* Plug-n-play for Pixhawk Standard Flight Controller
* The easiest way to connect your controller and Ground Station
* Interchangeable air and ground radio
* 6-position JST-GH connector
### **Specification**
* 2-way full-duplex communication through adaptive TDM UART interface
* Transparent serial link
|
| SiK Telemetry Radio 100mW | SiK Telemetry Radio 500mW | SiK Telemetry Radio 1W |
| --------------------------------- | ---------------------------------------------------------------- | ---------------------------------------------------------------- | ---------------------------------------------------------------- |
| Max RF Power | 20 dBm | 27 dBm | 30 dBm |
| Receive sensitivity | -121 dbm @2kbps RF Data Rate, -105 dbm @64kbps RF Data Rate | -121 dbm @2kbps RF Data Rate, -105 dbm @64kbps RF Data Rate | -121 dbm @2kbps RF Data Rate, -105 dbm @64kbps RF Data Rate |
| Line-of-sight range | 300\~500m (2dBi Antenna) | \~ 1km (2dBi Antenna) | \~ 50km (5dBi Antenna) |
| Antenna Gain | 2dBi | 2dBi | 5dBi |
| RF Data Rates | 2, 4, 8, 16, 32, 64(default), 96, 128, 192, 250 kbps | 2, 4, 8, 16, 32, 64(default), 96, 128, 192, 250 kbps | 2, 4, 8, 16, 32, 64(default), 96, 128, 192, 250 kbps |
| Serial Interface Data Rate | 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6(default), 115.2 kbps | 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6(default), 115.2 kbps | 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6(default), 115.2 kbps |
| Frequency Band | 902MHz - 928MHz or 414MHz - 460MHz | 902MHz - 928MHz or 414MHz - 460MHz | 902MHz - 928MHz or 414MHz - 460MHz |
| Interference Immunity | Frequency Hopping Spread Spectrum (FHSS) Configurable duty cycle | Frequency Hopping Spread Spectrum (FHSS) Configurable duty cycle | Frequency Hopping Spread Spectrum (FHSS) Configurable duty cycle |
| Address Options | Network ID: 0 –255 | Network ID: 0 –255 | Network ID: 0 –255 |
| Channels | Up to 50 Frequency Hopping Channels | Up to 50 Frequency Hopping Channels | Up to 50 Frequency Hopping Channels |
| Supported Network Topologies | Point-to-point | Point-to-point | Point-to-point |
| Configuration Method | MissionPlanner or AT Commands | MissionPlanner or AT Commands | MissionPlanner or AT Commands |
| Data Framing | Standard or MAVLink protocol framing | Standard or MAVLink protocol framing | Standard or MAVLink protocol framing |
| Error correction | Corrects up to 25% of bit errors open-source SIK firmware | Corrects up to 25% of bit errors open-source SIK firmware | Corrects up to 25% of bit errors open-source SIK firmware |
| Serial Data Connector & Interface | 6-pin JST-GH connector, 3.3V-TTL | 6-pin JST-GH connector, 3.3V-TTL | 6-pin JST-GH connector, 3.3V-TTL |
| USB | Micro-USB | Micro-USB | Type-C |
| SMA Connector | RP-SMA female | RP-SMA female | RP-SMA female |
| Power Connector | NA | NA | XT30 |
| Operating Temperature | 40\~85°C | 40\~85°C | 40\~85°C |
| Dimension | 28 x 53 x 10.7mm (without antenna) | 28 x 53 x 10.7mm (without antenna) | 66.5 x 32 x 16.5mm (without antenna) |
| Weight | 23.5g w/ antenna | 23.5g w/ antenna | 67g w/ antenna |
| Input Voltage (DC) | 5V | 5V | 7\~28V |
### **Electrical Data**
* Transmit current: 100 mA at 20 dBm
* Receive current: 25 mA (@5V),
* Serial interface: 3.3 V UART
#### **FCC IDENTIFIER:** 2AP22-HT03-V3
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