Quadcopter Mini Multiwii 2.3 with BMP280 Altitude Hold

Hi all, if you want to build a diy quadcopter (drone), I will show you how to build a mini quadcopter using multiwii 2.3 firmware, with diy ESC and BMP280 as a feature to make your drone on hover.

COMPONENTS:

• Mini 4Ch FS2A Flysky Receiver and Flysky transmitter2.
• Arduino pro mini 328p 5v
• Mpu6050/GY-521
• BMP280
• Mosfet si2302 (you can use: IRL520N or IRLZ44N)
• Diode in58197. Resistor 10K Ohm
• Resistor 100 Ohm (NOT MORE THAN 100 ohm !!!)
• Coreless DC Motors (you can use: 720, 820 or 8520 coreless DC Motor)
• Double Foam Tape (for BMP280 and MPU6050)
• Ice Stick for drone frame
• AWG 28 or AWG 26 (Never use jumpers!!!)
• AMS1117 3.3v or 3.3v breakout (for mpu6050 and BMP280
• Capacitor: 100uf 16v/25v/50v
• Step-up Converter, DC to DC 3.7v to 5v
• LiPO Battery: 3.7v, min.200mAh, min.45C/80C
• Propellers: 65mm/1mm or 75mm/1mm

WHAT TO DO

Connecting all wires based on the schematic diagram, or you can grab all here

How to activate barometer in your drone:

Change the value 0 to 1 in def.h file. Otherwise, it will show error in multiwiiConf-GUI.

• ACTIVATE: #define BMP280_CONNECTED 1
• DEACTIVATE: #define BMP280_CONNECTED 0

Calibrating your flight controller with BMP280 in multiwiiConf-GUI

• CLick on CALIB_ACC button
• Click on AUX1 (mid and high white boxes)
• then, click WRITE button

Flysky RECEIVER wiring to Arduino board

• Channel 1 flysky module to pin D4 of Arduino board
• Channel 2 flysky module to pin D5 of Arduino board
• Channel 3 flysky module to pin D2 of Arduino board
• Channel 4 flysky module to pin D6 of Arduino board

DIY brushed ESC using Mosfet

BMP280 and MPU6050 Wiring

Connect both bmp280 and mpu6050 SCL pins to A5 and SDA pins to A4. VCC of both of them must be connected to output pin (3.3v) of AMS1117 3.3v breakout.

Here's how to connect them both:

HOW to calibrate BMP280

• Arm your drone, go fly with it and then activate AUX1
• Keep your drone stable by checking th drone direction (tends to roll or to pitch). When it tends to roll, use your manual trim of your TX to fix it. Do it the same as pitch trim when you see your drone tends to left or right.
• When the drone stable enough, deactivate Aux1 in your flysky TX
• Land your drone then DISARM quickly
• Done

Multiwii Connecting Brushed ESC

For further and comprehensive tutorial, you can check them all here:

• Wiring
• Diy brushed ESC.

DEMO

Happy flying!

NOTE: If you have a question about it, please leave a comment. Whenever I open this page, I will answer your question.