Raspberry Pi PicoでUSBシリアル通信をするサンプルコード。

RaspberryPi_Pico_USB_Serial.py

from machine import Pin, PWM
from time import sleep

pwm = PWM(Pin(15))
# 80kHz
pwm.freq(80000)
pwm.duty_u16(0)

line = ""
while True:
    char = input()
    line += char
    
    if line.startswith("SOL") and line.endswith("EOL"):
        print(line)
        line = line.replace("SOL", "")
        duty = line.replace("EOL", "")
        pwm.duty_u16(int(duty))
        line = ""
        continue

    if line.endswith("EOL"):
        line = ""
    if len(line) > 20:
        line = ""