我目前正在使用树莓派，并使用DHT11每秒读取一次温度和湿度值。我必须将这些值实时保存到数据库中。这是我的代码，每秒显示一次传感器数据。
#!/usr/bin/python
import RPi.GPIO as GPIO
import dht11
import time
import datetime
import csv
import os
dht11_pin = 17
limit_sec = 15 #15 sec
# initialize GPIO
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.cleanup()
sleep_time = 1
instance = dht11.DHT11(pin=dht11_pin)
previous_temperature = 0
previous_humidity = 0
with open('test.csv', 'w', newline='') as csvfile:
field_names = ['Date', 'Time', 'Status', 'Temperature', 'Humidity']
writer = csv.DictWriter(csvfile, fieldnames=field_names)
writer.writerow({'Date': 'Date', 'Time': 'Time','Status': 'Status', 'Temperature': 'Temperature', 'Humidity': 'Humidity'})
try:
print "DHT11 Module Test (CTRL+C to exit)"
print "please wait..."
time.sleep(2)
now = datetime.datetime.now()
print("Ready! "+ now.strftime("%d/%m/%Y") + " / " + now.strftime("%H:%M:%S"))
result = instance.read()
if result.is_valid():
now = datetime.datetime.now()
print("Initial valid input: " + now.strftime("%d/%m/%Y") + " / " + now.strftime("%H:%M:%S"))
print("Temperature: %d C" % result.temperature)
print("Humidity: %d %%" % result.humidity)
print("*******************************************")
previous_temperature = result.temperature
previous_humidity = result.humidity
else:
print "Invalid result!"
pass
counter = 0
cnt = 0
while True:
cnt += 1
if cnt%limit_sec == 0 or cnt == 1:
result = instance.read()
if result.is_valid():
if previous_temperature != result.temperature or previous_humidity != result.humidity:
previous_temperature = result.temperature
previous_humidity = result.humidity
counter += 1
rightnow = datetime.datetime.now()
if result.humidity>=40:
status = 'Good condition.'
print(str(counter)+". Last valid input: " )
print("Date: " + rightnow.strftime("%d/%m/%Y"))
print("Time: " + rightnow.strftime("%H:%M:%S"))
print("Status: Your plant is on the good condition.")
print("Temperature: %d C" % result.temperature)
print("Humidity: %d %%" % result.humidity)
print("*******************************************")
else:
status = 'Bad condition'
print(str(counter)+". Last valid input: " )
print("Date: " + rightnow.strftime("%d/%m/%Y"))
print("Time: " + rightnow.strftime("%H:%M:%S"))
print("Status: Your plant is on the bad condition. Please open the water supply.")
print("Temperature: %d C" % result.temperature)
print("Humidity: %d %%" % result.humidity)
print("*******************************************")
writer.writerow({'Date': rightnow.strftime("%d/%m/%Y"), 'Time': rightnow.strftime("%H:%M:%S"), 'Status': status, 'Temperature':result.temperature, 'Humidity': result.humidity})
else:
print "Invalid result!"
pass
time.sleep(sleep_time)
except KeyboardInterrupt:
print " Quit"
GPIO.cleanup()
运行脚本时，出现以下错误：
以open（'test.csv'，'w'，newline =''）作为csvfile：
^
IndentationError：意外缩进
答案 0 :(得分：0)
您在try except中出现缩进错误，两者应使用相同的缩进
简而言之，它应该是：
imports.....
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.
.
with open('test.csv', 'w', newline='') as csvfile:
.
.
.
try:
.
.
except:
.
.
（已解决）完整代码：
import RPi.GPIO as GPIO
import dht11
import time
import datetime
import csv
import os
dht11_pin = 17
limit_sec = 15 #15 sec
# initialize GPIO
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.cleanup()
sleep_time = 1
instance = dht11.DHT11(pin=dht11_pin)
previous_temperature = 0
previous_humidity = 0
with open('test.csv', 'w', newline='') as csvfile:
field_names = ['Date', 'Time', 'Status', 'Temperature', 'Humidity']
writer = csv.DictWriter(csvfile, fieldnames=field_names)
writer.writerow({'Date': 'Date', 'Time': 'Time','Status': 'Status', 'Temperature': 'Temperature', 'Humidity': 'Humidity'})
try:
print "DHT11 Module Test (CTRL+C to exit)"
print "please wait..."
time.sleep(2)
now = datetime.datetime.now()
print("Ready! "+ now.strftime("%d/%m/%Y") + " / " + now.strftime("%H:%M:%S"))
result = instance.read()
if result.is_valid():
now = datetime.datetime.now()
print("Initial valid input: " + now.strftime("%d/%m/%Y") + " / " + now.strftime("%H:%M:%S"))
print("Temperature: %d C" % result.temperature)
print("Humidity: %d %%" % result.humidity)
print("*******************************************")
previous_temperature = result.temperature
previous_humidity = result.humidity
else:
print "Invalid result!"
pass
counter = 0
cnt = 0
while True:
cnt += 1
if cnt%limit_sec == 0 or cnt == 1:
result = instance.read()
if result.is_valid():
if previous_temperature != result.temperature or previous_humidity != result.humidity:
previous_temperature = result.temperature
previous_humidity = result.humidity
counter += 1
rightnow = datetime.datetime.now()
if result.humidity>=40:
status = 'Good condition.'
print(str(counter)+". Last valid input: " )
print("Date: " + rightnow.strftime("%d/%m/%Y"))
print("Time: " + rightnow.strftime("%H:%M:%S"))
print("Status: Your plant is on the good condition.")
print("Temperature: %d C" % result.temperature)
print("Humidity: %d %%" % result.humidity)
print("*******************************************")
else:
status = 'Bad condition'
print(str(counter)+". Last valid input: " )
print("Date: " + rightnow.strftime("%d/%m/%Y"))
print("Time: " + rightnow.strftime("%H:%M:%S"))
print("Status: Your plant is on the bad condition. Please open the water supply.")
print("Temperature: %d C" % result.temperature)
print("Humidity: %d %%" % result.humidity)
print("*******************************************")
writer.writerow({'Date': rightnow.strftime("%d/%m/%Y"), 'Time': rightnow.strftime("%H:%M:%S"), 'Status': status, 'Temperature':result.temperature, 'Humidity': result.humidity})
else:
print "Invalid result!"
pass
time.sleep(sleep_time)
except KeyboardInterrupt:
print " Quit"
GPIO.cleanup()