STM32 Quadcopter UAV
STM32 four-axis drone includes: flight control board and remote control.
Flight control ：
1. Product Introduction
This work is an STM32 four-axis drone flight controller, which can be paired with the remote control, and the flight can be controlled by the remote control (it cannot be used alone, it needs to be used with the remote control). You can improve and develop better drone works based on this design.
2. Application scenarios
It can be used by drone enthusiasts to assemble and test themselves, and own a simple drone assembled by themselves at low cost.
It can replace the damaged hollow cup drone flight controller and repair the drone.
For electronics enthusiasts to learn, for DIY production.
3. Product overview
STM32F103C8T6 with a main frequency of 72M is used as the main control.
Acceleration is measured with the MPU6050 gyroscope.
Ebyte E01-ML01S module is used for communication.
Four 8523 coreless motors are used to provide power.
After welding, the program needs to be programmed, and a certain amount of debugging experience is required.
The structure is simple and compact, and the circuit board is small.
Isolate the motor circuit from the working circuit of the chip to reduce interference.
The utility model has the advantages of less components, low price and low production cost.
Equipped with indicator lights in three primary colors, it is convenient for debugging and judging the status of the drone.
4. Product parameters
Power input: DC3.7V
Communication frequency: 2.4GHz
Burning interface: SWD
Communication interface: IIC, SPI, UART
PCB parameters: six-layer design, side length 3.3cm
5. Instructions for use
STM32 four-axis drone (1) - flight control board hardware project Figure 1
This work needs to be used with a remote control. For details, see my homepage, STM32 four-axis drone (2) - remote control.
After the circuit board is soldered, burn the program, and judge whether it is normal according to the indicator light. The following is the information represented by the color of the indicator light:
The cyan is always on, the blue is always on, and the power is on normally.
Blinking red slowly, MPU6050 is not detected.
Flashing red quickly, NRF24l01 is not detected.
Steady cyan, fast flashing red, signal loss
Cyan is always on, red is always on, the signal is normal, and it is locked.
The cyan is always on, the red is off, and it is unlocked.
remote control：
1. Product Introduction
This work is a STM32 four-axis drone remote control, which can be paired with the drone, and the drone can be controlled to fly off the ground through the remote control (it cannot be used alone, it needs to be used with the drone). You can improve and develop better works based on this design.
2. Application scenarios
It can be assembled and tested by drone enthusiasts, and has a simple drone remote control assembled by themselves at low cost.
For electronics enthusiasts to learn, for DIY production.
3. Product overview
STM32F103C8T6 with a main frequency of 72M is used as the main control.
Ebyte E01-ML01DP5 module is used for communication, and a 3dBi antenna is installed.
It is equipped with a 0.96-inch OLED for displaying information.
After welding, the program needs to be programmed, and a certain amount of debugging experience is required.
Equipped with indicator lights of three primary colors, which is convenient for debugging and judging the connection status.
By modifying the program, it can be compatible with other drones using the NRF24L01 module.
4. Product parameters
Power input: DC3.7V
Communication frequency: 2.4GHz
Burning interface: SWD
Communication interface: IIC, SPI, UART
PCB parameters: two-layer design, size 10*8.17cm
5. Instructions for use
STM32 four-axis drone (2) - remote control hardware project Figure 1
This work needs to be used with UAV flight control, see my homepage for details, STM32 four-axis UAV (1) - flight control board.
After the circuit board is soldered, burn the program, and judge whether it is normal according to the indicator light. The following is the information represented by the color of the indicator light:
Blinking blue, signal lost.
Green is always on, the signal is normal.
6. Remarks
It is recommended to use model aircraft batteries for the battery, which can be replaced when the power of the drone is low.
Some devices are not suitable for SMT, so some devices are set for self-soldering.
The remote sensing on the left is the throttle, the right is the direction, the left is the 10k resistance that is not centered up and down, the left and right will be centered, and the right is the 10k resistance that is both up and down, left and right.
Designed with 3MM copper pillar through holes, you can design the backplane connection for placing the battery.
After both the remote control and the drone are turned on, pull the remote sensor on the left side slowly from bottom to top to perform pairing. If the OLED shows that the pairing failed, please reset the flight control and remote control; then pull slowly from bottom to top to complete the frequency pairing; After the frequency is successful, the remote sensing on both sides shows an inward shape for about 3 seconds to unlock.
The remote control reserves 6 key channels, and the key functions can be edited according to personal preferences.
The production cost is about 50 yuan.
This work is developed using Keil5 MDK5.24, using ST-link V2 for program burning, no need to download additional firmware, just open the program connection line to download, or use the HEX file in the attachment to download with the assistant.
This work is used with drones, see my homepage for details, STM32 four-axis drone (1) - flight control board.
There are still a few points that need attention in use, which can be viewed in the attachment.