s5xr 发布的帖子

from pyb import Pin, Timer

# 50kHz pin6 timer2 channel1
light = Timer(2, freq=50000).channel(1, Timer.PWM, pin=Pin("P6"))
light.pulse_width_percent(100) # 控制亮度 0~100

while (True):
    time.sleep_ms(1000)
请在这里粘贴代码

通信的：
import time
from pyb import UART

uart = UART(3, 9600)

while(True):
uart.write('1234')
time.sleep(1000)//延时
if uart.any():
a=uart.readline().decode()
print(a)