Ports & Buttons

Power Port (4-position JST-GH, XT30 for V2 design)

The input Voltage range is 7-35 VDC. The Radio must be powered by this Power Port. Please connect to a power supply when in use and during configuration.

Config Button

Holding this button while powering up the radio will boot the unit into COMMAND mode: the default serial interface will be active and temporarily set to operate at its default serial settings of 9600/8/N/1.

USB

USB Type-C Port with internal USB to Serial Converter. Holybro Microhard Radio’s USB port provides access to the Serial data Port. That means you can connect the Holybro Microhard Radio to your ground station via the USB port directly. USB VBus only powers the USB to Serial chip, and does not power the Radio.

The USB port of the Holybro Microhard V1 Radio is different from the MicroHard Enclosed Option, where the USB port provides access to the Diagnostic Port. V2 design now operates similarly to the MicroHard Enclosed module.

USB SWITCH Button(Only for V2 design)

When the Radio is powered on, if the USB Type-C connection is detected, the USB port provides access to the serial data Port of the Radio by default. Holding down the SWITCH button (approximately 3 seconds) until the DIAG(diagnostics) LED comes on, the USB port switches access to the diagnostic Port of the Radio. Holding down the SWITCH button (approximately 3 seconds) again until the DIAG LED goes out, the USB port now switches back to the Serial data Port of the Radio.

Data Port (6-position JST-GH)

This data Port is used to connect to the telemetry port of your flight controller. When the USB Type-C port isn't connected, this port will transfer serial data automatically. When USB Type-C is plugged in, this connector is floating. Data Port does not power the Radio.

Diagnostic Port (4-position JST SH only available for V1 design)

This connector connects to the Diagnostic Port. If you use the PicoConfig application or special diagnostic commands to configure the Radio, you should connect to this port. Diagnostic Port is 3.3V logic level compatible. A USB to Serial board is needed for connecting the radio to your computer. UART to USB Converter