Serial 2 / Telemetry 2 / IRDA

Pinout and schematic for the Telemetry 2 port, which can also be configured as IRDA or extra I2C bus.

On older versions of the RDDRONE-FMUK66, this port could only be used as IRDA. Since RDDRONE-FMUK66 Rev. C, it is by default configured as a free UART, which can be used as Telemetry 2 in PX4. It can still be reconfigured to use it as IRDA or as an extra I2C bus, though pull-up resistors will have to be placed by hand.

RDDRONE-FMUK66 Rev. C connector pinout

Pin

Signal

Voltage

1

VCC

+5.0V

2

UART TX

+3.3V

3

UART RX

+3.3V

4

GND

GND

RDDRONE-FMUK66 Rev. C schematic

RDDRONE-FMUK66 Rev. B connector pinout

Rev. B (and older boards) are not supported anymore. This information is left for reference.

Pin

Signal

Voltage

1

GND

GND

2

UART RX

+3.3V

3

VCC

+3.3V

4

IR-

+5.0V

5

IR+

+5.0V

RDDRONE-FMUK66 Rev. B schematic