关于python：如何使用电子邮件将传感器数据发送给用户

how to send sensor data to the user using email

我目前正在使用树莓派并使用 DHT11 每秒读取温度和湿度值。我必须通过电子邮件将通知发送给用户。这是我每秒显示传感器数据的代码，我不知道如何向用户发送电子邮件。我只需要在湿度低于 40 时发送通知。

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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)

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)

else:
print"Invalid result!"
pass

time.sleep(sleep_time)

您可以这样发送电子邮件：

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import smtplib

sender = '[email protected]'
receiver = '[email protected]'
msg['Subject'] = 'Humidity below 40'
msg['From'] = sender
msg['To'] = receiver

# e.g. gmail account
s = smtplib.SMTP("smtp.gmail.com", 587)
s.starttls()
s.login('username', 'password')
s.sendmail(sender, [receiver], msg.as_string())
s.close()