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Nxt-FC DUAL

Nxt-FC

All GPIO & function small size PX4 for UAV research for HKUST UAV-Group

ArduPilot and PX4 firmware are supported !

Dimension of Nxt-FC: 27mmx32mmx8mm

Micoair is now producing Nxt-FC: Micoair official website Taobao Ali-Express

image-20240417000420113

image-20240417000600083

UART TTY SerialName Suggest Funcion
USART1 /dev/ttyS0 SERIAL_GPS1
USART2 /dev/ttyS1 SERIAL_GPS2
USART3 /dev/ttyS2 SERIAL_TEL1
UART4 /dev/ttyS3 SERIAL_TEL2
UART5 /dev/ttyS4 SERIAL_RC Receiver
USART6 /dev/ttyS5 Debug Currently not available, can be enable
UART7 /dev/ttyS6 SERIAL_TEL3 AUX
UART8 /dev/ttyS7 SERIAL_TEL4 AUX

Getting start

Use precompiled bootloader and firmware

  1. Use the firmware files from ./firmware.

  2. QGC upgrade is also available.

Compile locally

Follow the PX4 standard approach.

Bootloader:

make hkust_nxt-dual_bootloader

Firmware:

make hkust_nxt-dual

Setting up Nx-FC

PX4 Configuration settings

Power

Set power_source Power Module, then calibrate voltage and current analog data

1683205772803

Receiver

Set RC_PORT_CONFIG with Radio controller

1683205983224

MAVLink

Set MAV_0_CONFIG with TELEM 2

1683206065854

HIGH_RES_IMU and High frequency /imu/data

create file in your tf-card /etc/extras.txt

mavlink stream -d /dev/ttyS3 -s ATTITUDE -r 200

mavlink stream -d /dev/ttyS3 -s HIGHRES_IMU -r 1000

then using the following settings

IMU_GYRO_RATEMAX: 2000Hz

IMU_INTEG_RATE: 400Hz

MAV_0_MODE: External vision

Set Uart4 to 921600

MAV_0_RATE 92160B/s

after these settings you will have 250Hz /imu/data_raw /imu/data

TODO

  • 500Hz stable firmware based on PX4 1.14