问题
I'm currently working with raspberry pi and using DHT11 to read temperature and humidity values every second. I have to save these values into a database in real time. here's my code that showing sensor data every second, I don't know how to save the data/result in excel.
import RPi.GPIO as GPIO
import dht11
import time
import datetime
import os
# initialize GPIO
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.cleanup()
instance = dht11.DHT11(pin=dht11_pin)
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:
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:
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("*******************************************")
else:
print "Invalid result!"
pass
time.sleep(sleep_time)
回答1:
first thing is to import csv
module then use
with open('file_name.csv', 'w', newline='') as csvfile:
writer = csv.DictWriter(csvfile, fieldnames=field_names)
field_names
are just key value for your column
writer.writerow(
{'Date': 'Date', 'Time': 'Time',
'Status': 'Status', 'Temperature': 'Temperature', 'Humidity': 'Humidity'})
write header for your excel file
writer.writerow(
{'Date': rightnow.strftime("%d/%m/%Y"), 'Time': rightnow.strftime("%H:%M:%S"),
'Status': status, 'Temperature':result.temperature, 'Humidity': result.humidity})
write data in your csv file as per the key values in field_names
full code:
import RPi.GPIO as GPIO
import dht11
import time
import datetime
import csv
import os
# initialize GPIO
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.cleanup()
instance = dht11.DHT11(pin=dht11_pin)
with open('file_name.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'})
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 = 'Your plant is on the 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 = 'Your plant is on the bad condition. Please open the water supply.'
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)
where first writer.writerow
will be you header and field_names
are just used as key to fill you data to perticular column
store your status = ''
and put it in writer.writerow()
etc.
来源:https://stackoverflow.com/questions/51568203/how-to-save-sensor-data-output-into-excel-using-python