GPS

Pinout of the GPS connector on FMU side and on the side of the GPS module.

RDDRONE-FMUK66 Rev. B had a conventional 6 pin GPS connector. On RDDRONE-FMUK66 Rev. C this has been replaced by the 10 pin connector used by the Pixhawk 4 and its GPS. The HoverGames drone kit will also include this GPS. The 10 pin connector also includes the pinout for an arming switch and a buzzer.

RDDRONE-FMUK66 Rev. C connector pinout

Pin

Signal

Voltage

1

VCC

+5.0V

2

UART TX

+3.3V

3

UART RX

+3.3V

4

I2C SCL

+3.3V

5

I2C SDA

+3.3V

6

SWITCH INPUT

+3.3V

7

SWITCH LED OUTPUT

+3.3V

8

3V3

+3.3V

9

BUZZER

+3.3V

10

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

VCC

+5.0V

2

UART TX

+3.3V

3

UART RX

+3.3V

4

I2C SCL

+3.3V

5

I2C SDA

+3.3V

6

GND

GND

RDDRONE-FMUK66 Rev. B schematic

ReadytoSky u-blox NEO-M8N GPS module pinout

This GPS module was included in some older HoverGames drone kits. For some very old kits even the pinout had to be corrected, according to the table below. Note this is different from the RDDRONE-FMUK66 Rev. B (Dronecode) pinout.

The pinout below has been tested and validated with a ReadyToSky M8N generic GPS module.

Pin on NEO-M8N

Color

Signal

Voltage

Pin on FMU

1

Red

VCC

+5.0V

1

2

Black

GND

GND

6

3

Yellow

UART RX

+3.3V

2

4

Green

UART TX

+3.3V

3

5

White

I2C SDA

+3.3V

5

6

Orange

I2C SCL

+3.3V

4

Close up of the NEO M8N Connector pinout and cable colors.

ReadytoSky u-blox NEO-M8N GPS module schematic

GPS module render.