Liquid Leak Alarm with Python

import requests
import json
import smtplib                 # SMTP
from email.mime.text import MIMEText   # 
from email.header import Header
import datetime                # 
import schedule

def run():
    url = "https://sensecap.seeed.cc/openapi/view_latest_telemetry_data?device_eui=2CF7F1C043400087&measurement_id=4165&channel_index=1"
    headers = {'Authorization': 'Basic U1RLTU9SWEFHR1RKMVdGTjozQTJDRjZBQUJBNTA0RjM0QjMzQTE5NUQxOEM2N0YyNjJFMTczMzNGRkQ2NTRBMjI4MDkwMjQzQTQ4QjU0RjQ2'}
    r = requests.get(url, headers=headers)
    Value = json.loads(r.content)
    print(r.status_code)
    print(Value)
    print(r)
    Signal = Value.get('data')[0].get('points')[0].get('measurement_value') #list
    print(Signal)
    if Signal > 0:
        time = datetime.datetime.now()
        with open('alerttime.csv', 'a') as f:   # /
            f.write(str(time))                  # 
            f.write('\n')
def sendmail():
    smtpserver = 'smtp.qq.com'
    username = '826696169@qq.com'
    password = 'xawnqxttgznxbdjf'               # smtp
    sender = '826696169@qq.com'
    receiver = 'kewei.li@seeed.cc'

    msg = MIMEText("warning", 'plain', 'utf-8')  # 
    msg['From'] = sender
    msg['To'] = receiver
    msg['Subject'] = Header("Attention", 'utf-8')      # 
    smtp = smtplib.SMTP()
    try:
        smtp.connect(smtpserver)                # smtp
        smtp.login(username, password)
        smtp.sendmail(sender, receiver, msg.as_string())
        print("")
    except smtplib.SMTPException:
        print("")
if __name__ == '__main__':
    run()
schedule.every(1).minutes.do(run)
while True:
    schedule.run_pending()       #