我尝试将日期和时间输入Azure IoT hub，以便使用Azure DX作为时间序列进行分析。我可以获得温度和湿度（此时的湿度只是一个随机数）。如果我使用此代码，则一切正常，JSON格式良好，并流入IoT hub和Azure DX：
代码的基础取自此处的Microsoft示例-https://github.com/Azure-Samples/azure-iot-samples-python/blob/master/iot-hub/Quickstarts/simulated-device/SimulatedDeviceSync.py

import asyncio
import random
from azure.iot.device import Message
from azure.iot.device.aio import IoTHubDeviceClient
import time
from datetime import datetime
from w1thermsensor import W1ThermSensor
sensor = W1ThermSensor()
import json

CONNECTION_STRING = "xxxxx"
HUMIDITY = 60

MSG_TXT = '{{"temperature": {temperature},"humidity": {humidity}}}'

async def main():

    try:
        # Create instance of the device client
        client = IoTHubDeviceClient.create_from_connection_string(CONNECTION_STRING)

        print("Simulated device started. Press Ctrl-C to exit")
        while True:

            humidity = round(HUMIDITY + (random.random() * 20), 2)
            temperature = sensor.get_temperature()

            msg_txt_formatted = MSG_TXT.format(temperature=temperature, humidity=humidity)
            message = Message(msg_txt_formatted)

            # Send a message to the IoT hub
            print(f"Sending message: {message}")
            await client.send_message(message)
            await asyncio.sleep(1)

    except KeyboardInterrupt:
        print("Simulated device stopped")

if __name__ == '__main__':
    asyncio.run(main())

JSON格式是有效的，并且运行良好-
{ "temperature": 7, "humidity": 66.09 }
如果我尝试添加这样的日期/时间字段：

import asyncio
import random
from azure.iot.device import Message
from azure.iot.device.aio import IoTHubDeviceClient
import time
from datetime import datetime
from w1thermsensor import W1ThermSensor
sensor = W1ThermSensor()
import json

CONNECTION_STRING = "xxxxx"
HUMIDITY = 60

x = datetime.now()
timesent = str(x)

MSG_TXT = '{{"temperature": {temperature},"humidity": {humidity},"timesent": {timesent}}}'

async def main():

    try:
        # Create instance of the device client
        client = IoTHubDeviceClient.create_from_connection_string(CONNECTION_STRING)

        print("Simulated device started. Press Ctrl-C to exit")
        while True:

            humidity = round(HUMIDITY + (random.random() * 20), 2)
            temperature = sensor.get_temperature()

            msg_txt_formatted = MSG_TXT.format(temperature=temperature, humidity=humidity, timesent=timesent)
            message = Message(msg_txt_formatted)

            # Send a message to the IoT hub
            print(f"Sending message: {message}")
            await client.send_message(message)
            await asyncio.sleep(1)

    except KeyboardInterrupt:
        print("Simulated device stopped")

if __name__ == '__main__':
    asyncio.run(main())

JSON的输出不再有效，Azure DX将不会Map。我获得的无效JSON为：
"{\"temperature\": 7,\"humidity\": 72.88, \"timesent\": 2022-11-08 14:21:04.021812}"
我怀疑这与日期/时间被格式化为字符串有关，但我完全迷路了。
有人知道我怎么发送这些数据吗？