BLE CH582M development board

There are no pitfalls in the board, so feel free to make it. If you have any questions, comment and communicate.
Preface
: I was looking for a low-power Bluetooth MCU (not counting Espressif) and found this chip. The configuration is as follows: For the following content, you can ignore
the board type
and refer to the official Qinheng verification board, and then optimize the layout yourself. Improve the space utilization, and then try to make the components as symmetrical as possible
LED pin description
In the lighting demonstration video below, one step is to use Dupont wire to connect the IO and LED pins, because the LED has a separate pin and is not directly connected to the IO , in order to achieve extremely low power consumption and avoid the impact of IO leakage current on the test results during low-power testing. This is the second version of the board that has been
pulled
up like this. The first version is based on the official schematic diagram. The BOOT pin is not pulled up, causing it to enter download mode as soon as it is powered on. Adding a pull-up resistor to the button at the back eliminates this problem.
The antenna
adopts a ceramic antenna. Because it is difficult for me to do impedance matching when making boards, I gave up the PCB antenna
demonstration video
. The video demonstrates the connection between the pins of IO and LED and the buttons. Press the BOOT button to connect to the computer via USB to download the firmware and the effect of the running water lamp