Question

我是Python的新手，我正在尝试将串口从Arduino获取的数据保存到MySQL数据库，但我只能保存一次，因为我必须再次运行程序再次保存，我试过了使用while循环，但我只坚持数据库一次，并继续得到“无法从Arduino获取数据！”。

这是我的代码：

import serial
import MySQLdb


dbConn = MySQLdb.connect("localhost","root","sasa","sms") or die ("could not connect to database")
cursor = dbConn.cursor()

device = 'COM3'

try:
  print "Trying...",device
  arduino = serial.Serial(device, 9600)
except:
  print "Failed to connect on",device


try:
  data = arduino.readline()
  pieces = data.split("\t")

  try:
    cursor.execute("INSERT INTO industrial (db) VALUES (%s)", (pieces[0]))
    dbConn.commit()
    cursor.close()
  except MySQLdb.IntegrityError:
    print "failed to insert data"
  finally:
    cursor.close()
except:
  print "Failed to get data from Arduino!"

Answer 1

我已经知道了，实际上它非常简单，我只是在开头放了一个while True:，并且它正确更新，如果有人有兴趣，这里是代码：

import serial
import MySQLdb

while True:
    dbConn = MySQLdb.connect("localhost","root","sasa","sms") or die ("could not connect to database")
    cursor = dbConn.cursor()

    device = 'COM3'


    try:
      print "Trying...",device
      arduino = serial.Serial(device, 9600)
    except:
      print "Failed to connect on",device


    try:
      data = arduino.readline()
      pieces = data.split("\t")


      try:
        cursor.execute("INSERT INTO industrial (db) VALUES (%s)", pieces)
        dbConn.commit()
        cursor.close()
      except MySQLdb.IntegrityError:
        print "failed to insert data"
      finally:
        cursor.close()
    except:
      print "Failed to get data from Arduino!"

在MySQL数据库上保存数据有问题

1 个答案: