from fastapi import FastAPI
import serial
import uvicorn
import threading

app = FastAPI()

ser = serial.Serial('COM6', 9600)
line = '0'

def read_value():
    global line
    while True:
        if ser.in_waiting > 0:
            line = ser.read().decode()

threading.Thread(target=read_value, daemon=True).start()

@app.get("/stat")
async def get_stat():
    return {'state': line}

@app.get("/")
async def root():
    return {'message': 'hello world'}

uvicorn.run(app, host="0.0.0.0", port=12346)