ValueError：“port”必须是None或字符串，不是

Question

我不明白这个错误，经过5小时寻找解决方案后我终于放弃了。

我正在尝试打开一个串行连接，但显然我的端口不是一个刺痛？

同一个端口可以在不同的代码中正常工作......

NOT WORKING

import serial
import pynextion


class NextionApp:

    def __init__(self):
        ser = serial.Serial("/dev/ttyAMA0", 9600, timeout=0)
        pages = [
            {"id": "0", "name": "page0()page",
                "components": [
                    {"id": "1", "type": "text", "name": "txt_tmp"},
                    {"id": "3", "type": "text", "name": "txt_hum"},
                    {"id": "0", "type": "text", "name": "txt_co2"},
                    {"id": "4", "type": "button", "name": "btn_test"},
                ]
            }
        ]
        self.nextion = pynextion.Nextion(ser, pages)
        print("Serial connected")

nextionApp = NextionApp()

WORKING

#!/usr/bin/env python


import time
import serial


ser = serial.Serial("/dev/ttyAMA0", 9600, timeout=1)
counter=0


while 1:
   x=ser.readline()
   print (x)

Answer 1

Python Nexation库期望接收设备路径作为输入而不是serial对象的实例（它自己创建）。你应该致电：

self.nextion = pynextion.Nextion("/dev/ttyAMA0", pages)