AWS IoT核心向主题发布MQTT消息

【以下的问题经过翻译处理】 大家好，我刚开始使用 AWS IoT Core。我正在使用 raspberry pi 向控制台发送和接收带有传感器数据的消息。我可以成功发送消息，但我无法接收我发布到同一主题的消息（当我发布到该主题时，我在树莓派上看不到它们）我正在使用我在此处找到的用于空间占用的模板：< https://aws.amazon.com/blogs/iot/monitor-and-visualise-building-occupancy-with-aws-iot-core-amazon-quicksight-and-raspberry-pi/>

我还想知道如何将我发送的消息保存到一个变量中，以便在我的程序中使用。

from datetime import datetime

global message
import requests
import time
从 AWSIoTPythonSDK.MQTTLib 导入 AWSIoTMQTTClient

myMQTTClient = AWSIoTMQTTClient("outsidecam")
myMQTTClient.configureEndpoint("myendpoint", 8883)

myMQTTClient.configureCredentials("/home/pi/certs/Amazon-root-CA-1.pem", "/home/pi/certs/private.pem.key", "/home/pi/certs//home/pi /certs/certificate.pem.crt")

print ('Initiating Realtime Data Transfer From Raspberry Pi...')

myvar=myMQTTClient.connect()

date = datetime.now().strftime("%Y_%m_%d-%I:%M:%S_%p")
print (f"Timestamp:{date}")

while True:
    print("Sending message")
    message= "This is a Test"
    myMQTTClient.publish("topic/pi", "{\"MotionMessage\":\""+ message + "\", \"Timestamp\" :\""+ str(date)+ "\"}", 0)
    time.sleep(60)