HolyBro 915Mhz Telemetry Radio 100mW V3

Processing:
100 mW maximum output power (adjustable) -117 dBm receive sensitivity
Open-source SIK firmware
RP-SMA connector
2-way full-duplex communication through adaptive TDM UART interface
Transparent serial link
MAVLink protocol framing
Frequency Hopping Spread Spectrum (FHSS) Configurable duty cycle
Error correction corrects up to 25% of bit errors Open-source SIK firmware
Configurable through Mission Planner & APM Planner
FT230X is a USB to BASIC UART IC
Features
Interchangeable air and ground modules 915 or 433 mHz
Micro-USB port
4-position JST-GH connector
Status LEDs
The radios have 2 status LEDs, one red and one green. The meaning of the
different LED states is:
Green LED blinking - searching for another radio
Green LED solid - link is established with another radio
Red LED flashing - transmitting data
Red LED solid - in firmware update mode
Connecting to Pixhawk4
Use the 4 pin JST-GH connector that should have come with the radio to connect the radio to your Pixhawk4’s “Telem 1” (“Telem 2” can also be used but the default recommendation is “Telem1”).
Connecting to a PC
Connecting the radio to your Windows PC is as simple as connecting the micro USB cable (which should have been included with the radio) to your PC. The necessary drivers should be installed automatically and the radio will appear as a new “USB Serial Port” in the Windows Device Manager under Ports (COM & LPT). The Mission Planner’s COM Port selection drop-down should also contain the same new COM port.
Product Details
Dimensions: 26 x 53 x 10.7mm (without antenna)
Power Supply voltage: 5VDC (from USB or JST-GH)
Transmit current: 100 mA at 20dBm
Receive current: 25 mA
Serial interface: 3.3 V UART
Item Packing
2 x data radios
2 x antennas
2 x conversion connectors
2 x 6-pin to 4-pin cables
1 x Micro USB cable
1 x OTG cable