from fastapi import FastAPI
from pymodbus.client import ModbusSerialClient
import threading
import time
import logging
import sys

serial_port = "COM6"
baud_rate = 9600
modbus_client = ModbusSerialClient(serial_port, baudrate=baud_rate)
modbus_data = "0"

# logging.basicConfig()
# log = logging.getLogger()
# log.setLevel(logging.DEBUG)


def poll_modbus():
    global modbus_data
    while True:
        try:
            modbus_client.connect()
            time.sleep(3.0)
            response = modbus_client.read_discrete_inputs(0, 1, slave=1)
            #print(response.bits[0])

            if not response.isError():
                #modbus_data = response.registers[0]
                modbus_data = response.bits[0]
            print(modbus_data)
            
        except:
            pass


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

app = FastAPI()


@app.get("/modbus_data")
async def get_modbus_data():
    return {"modbus_data": int(modbus_data)}


@app.get("/")
async def root():
    return {"message": "Welcome to FastAPI with Modbus"}


if __name__ == "__main__":
    import uvicorn

    uvicorn.run(app, host="0.0.0.0", port=12345)