我正在测试物联网传感器,每个传感器都将温度读数发送到 QuestDB 实例,我使用 Python 中的基本 TCP 套接字连接来发送它,如下所示:
import datetime as dt
import socket
import Adafruit_DHT
HOST = '127.0.0.1'
PORT = 9009
sensor = Adafruit_DHT.DHT22
pin = 23
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
def now():
return int((dt.datetime.utcnow() - dt.datetime(1970, 1, 1)).total_seconds() * 1000) * 1000000
while True:
humidity, temp = Adafruit_DHT.read_retry(sensor, pin)
if temp is not None:
try:
sock.sendto(('readings,sensor=%s temp=%s %s' % (sensor_name,temp,now())).encode(), (HOST, PORT))
except socket.error as e:
print("Got error: %s" % (e))
sock.close()
这可以将数据插入到readings
表中,但看起来有些读数丢失了,我看到了
cannot insert records out of order