Nanmu car remote control

This remote control is for learning Jixiaoxin handle. Compared with Jixiaoxin handle, the following changes have been made
: 1. The size has become smaller. The size of the PCB board is 10*5.75cm. Currently, free prototyping is available at Jialichuang
2. It uses STM32F103C8T6 core The board is pluggable and easy to use in other projects in the future
. 3. The battery uses 18650 lithium battery and has a battery holder to fix it.
A buzzer is added. Low battery detection will alarm
5. The expansion interface is abandoned because the core board does not have PA13, PA14, but the expansion port is generally not used
 
Function description
OLED display: The upper right corner is the battery voltage, the middle is the wireless module status, the lower left and lower right are the rocker gears
: the left rocker is the throttle, which can make the car Forward or backward, the right joystick is for steering, which can make the car turn left or right. Buttons: KEY_1 button can control the car lights to turn on and off. The right joystick button can make the car whistle. Currently, only the power of
these two buttons is set.
Detection: The battery voltage is less than 3.3V and the buzzer will alarm.
 
Notes
: 1. The left and right joysticks cannot be shaken at the same time. For example, if the accelerator is forward and the wheel moves forward, while the wheel on one side of the steering wheel moves backward, then There will be conflicts
. 2. Buy the lithium battery 18650 with a flat head, otherwise it will not fit in.
3. The safe voltage of the lithium battery 18650 is generally 2.8-4.2V. It cannot be overcharged or overdischarged, which may cause safety accidents.
4. Voltage display, if the middle If one bit is 0, it will not be displayed. For example, 4.07V will display 4.7V with a space in the middle.
5. The STM32 core board pin screen printing must be consistent with the screen printing on the PCB board.
 
Video introduction of Station B: https://www.bilibili.com /video/BV1Ms4y1n73p/?pop_share=1&vd_source=e2420515f6672ecf4add3abf14358862