一天后，通过pyserial的Raspberry Arduino通信停止

我通过USB连接了Raspberry Pi和Arduino . Arduino通过传感器（EC和温度传感器）从世界获取数据并将此数据写入串行数据 . Raspberry正在将这些数据写入数据库 .

Arduino草图：

#include <OneWire.h>
#include <DallasTemperature.h>

int R1= 500;
int Ra=25; //Resistance of powering Pins
int ECPin= A0;
int ECGround=A1;
int ECPower =A4;

float PPMconversion=0.7; 
float TemperatureCoef = 0.019; 
float K=2.88;

#define ONE_WIRE_BUS 10          // Data wire For Temp Probe is plugged into pin 10 on the Arduino
const int TempProbePossitive =8;  //Temp Probe power connected to pin 9
const int TempProbeNegative=9;    //Temp Probe Negative connected to pin 8

OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);// Pass our oneWire reference to Dallas Temperature.


float Temperature=10;
float EC=0;
float EC25 =0;
int ppm =0;


float raw= 0;
float Vin= 5;
float Vdrop= 0;
float Rc= 0;
float buffer=0;

void setup()
{
  Serial.begin(9600);
  pinMode(TempProbeNegative , OUTPUT ); //seting ground pin as output for tmp probe
  digitalWrite(TempProbeNegative , LOW );//Seting it to ground so it can sink current
  pinMode(TempProbePossitive , OUTPUT );//ditto but for positive
  digitalWrite(TempProbePossitive , HIGH );
  pinMode(ECPin,INPUT);
  pinMode(ECPower,OUTPUT);//Setting pin for sourcing current
  pinMode(ECGround,OUTPUT);//setting pin for sinking current
  digitalWrite(ECGround,LOW);//We can leave the ground connected permanantly

  delay(100);// gives sensor time to settle
  sensors.begin();
  delay(100);
  R1=(R1+Ra);// Taking into acount Powering Pin Resitance

};

void loop()
{
  GetEC();
  PrintReadings();  // Cals Print routine [below main loop]
  delay(20000);
}

void GetEC(){
  sensors.requestTemperatures();// Send the command to get temperatures
  Temperature=sensors.getTempCByIndex(0); //Stores Value in Variable
  digitalWrite(ECPower,HIGH);
  raw= analogRead(ECPin);
  raw= analogRead(ECPin);// This is not a mistake, First reading will be low beause if charged a capacitor
  digitalWrite(ECPower,LOW);

  Vdrop= (Vin*raw)/1024.0;
  Rc=(Vdrop*R1)/(Vin-Vdrop);
  Rc=Rc-Ra; //acounting for Digital Pin Resitance
  EC = 1000/(Rc*K);

  EC25  =  EC/ (1+ TemperatureCoef*(Temperature-25.0));
  ppm=(EC25)*(PPMconversion*1000);


}

void PrintReadings(){
  Serial.print("Rc: ");
  Serial.print(Rc);
  Serial.print(" EC: ");
  Serial.print(EC25);
  Serial.print(" Simens  ");
  Serial.print(ppm);
  Serial.print(" ppm  ");
  Serial.print(Temperature);
  Serial.println(" *C ");
  Serial.print("Vdrop: ");
  Serial.println(Vdrop);
  Serial.print("Rc: ");
  Serial.println(Rc);
  Serial.print(EC);
  Serial.println("Siemens");
};

Raspberry Pi上的代码：

import serial
import time
import re
import sqlite3

for com in range(0,4):
  try:
    PORT = '/dev/ttyACM'+str(com)
    BAUD = 9600
    board = serial.Serial(PORT,BAUD)
    board.close()
    break
  except:
    pass

DEVICE = '/dev/ttyACM'+str(com)
BAUD = 9600
s = serial.Serial(DEVICE, BAUD)

conn=sqlite3.connect('mydatabase.db')
cursor=conn.cursor()

#s.open()
time.sleep(5) # der Arduino resettet nach einer Seriellen Verbindung, daher muss kurz gewartet werden

#s.write("test");

while True:
    response = s.readline()
    numbers = re.findall(r"[-+]?\d*\.\d+|\d+", response)
    if len(numbers) == 4:
            temp = numbers[3]
            ec = numbers[1]
            result = cursor.execute("INSERT INTO sensordata (temp, ec) VALUES ({temp}, {ec})".form$
            conn.commit()
    print response

在Raspberry端写入数据大约24小时，然后我不再从Arduino获得串行输出 . 当我再次重启python脚本时出现同样的问题 . 当我重新启动python脚本并再次启动串行通信时，Arduino将重置 . 我没有更改此默认行为 . 我仍然没有通过串口获取数据这一事实告诉我，Arduino方面没有内存问题 . 还有一个提示，它一定是Raspberry的一个问题，我是否可以从重新启动Raspberry解决问题并且数据再记录24小时这一事实 .

有人好奇地给我一个暗示，如何 Build 稳固的沟通？