Arduino Nano(UNO) Multiwii

Motivation

• I'd like to make quadrotor from scratch.
• Reference : https://www.electronoobs.com/eng_arduino_tut23.php
• I'd like to use my taranis transmitter.
• I'd like to have another serial for MultiwiiConf or Bluetooth.

Hardware Design

1. Uno or Nano has one Hardware Serial.

• This is for receiver (Frsky XM series)
• Frsky receiver(XM) uses 100,000 baud rate, and it should be connected to real Hardware UART.
• SBUS protocol need signal inverter.

2. Alt Software serial

• This library uses PIN 8, 9.
• Assign PWM for motor control 3, 5, 6, 11.
• Stable baud rate is 19200 for protocol communication.
• For Bluetooth(HC-05) and FT232 which makes MultiWiiConf connection wireless and wired.

Basic configuration : config.h

• #define QUADX

• #define GY_521

  6-axis Gyro

• #define SBUS PITCH,YAW,THROTTLE,ROLL,AUX1,AUX2,AUX3,AUX4,8,9,10,11,12,13,14,15,16,17

  Enable SBUS serial receiver (Futaba, Frsky)

• #define USE_ALT_SOFT_SERIAL

  set PWM motors and enable Alt Software serial

• #define MOTOR_STOP

  stop motor when Armed

Material

• Motor, Prop : Syma X5 motor (0720)
• Frame : image/frame.stl
• Prototype board : 17x17 (52mm)

Demo Video

• https://www.youtube.com/watch?v=ynND-c3DFZ0