Question

我正在尝试将M2MQTT Paho Python客户端连接到ASW IoT，这是我在C＃中成功完成的。但是，由于某些原因，此代码无法正常工作。我花了很多时间尝试各种参数。现在，我的代码没有任何错误，只是等待服务器响应，但是没有...

顺便说一句，这些证书是从Amazon下载的，而且AmazonRootCA1.crt是Amazon Toot CA证书，其他证书（及其私钥）特定于该证书，附加策略以及我在Amazon上创建的附加内容。

我还尝试了TLSv1，并且没有成功的客户端证书...

#! /usr/bin/python3.5
import serial
import time
import datetime
import os
import socket
import ssl
import logging
import paho.mqtt.client as mqtt
import sys
print(sys.executable)

def on_disconnect(client, userdata, rc):
    if rc==0:
        print("client disconnected OK")
        client.connected_flag=False

def on_connect(client, userdata, flags, rc):
    if rc==0:
        print("Connected OK")
        mqtt.Client.connected_flag=True
        mqtt.Client.bad_connection_params=False
    else:
        mqtt.Client.bad_connection_params=True

        if rc==1:
            print("Failed to connect. Connection refused, unacceptable protocol version. Error Code=", rc)
        elif rc==2:
            print("Failed to connect.Connection refused, identifier rejected. Error Code=", rc)
        elif rc==3:
            print("Failed to connect.Connection refused, server unavailable. Error Code=", rc)
        elif rc==4:
            print("Failed to connect.Connection refused, bad user name or password. Error Code=", rc)
        elif rc==5:
            print("Failed to connect.Connection refused, not authorized. Error Code=", rc)


def on_publish(client, userdata, mid):
    if rc==0:
        print("Data published OK: ", userdata)
    else:
        print("Failed to publish data. MessageID=", mid)
    pass


broker="myendpoint-ats.iot.us-west-2.amazonaws.com"
port=8883

# 4 stands for MQTTv311
rpiclient = mqtt.Client("PahoClient-on-RPi-Gateway2", clean_session=True, userdata=None, protocol=4, transport="tcp") 

caCertPath = "./AmazonRootCA1.pem"
clientCertFilePath = "./xxxxxxxxxx-certificate.pem.crt"
keyFilePath = "./xxxxxxxxxx-private.pem.key"
rpiclient.tls_set(ca_certs=caCertPath,
                  certfile=clientCertFilePath,
                  keyfile=keyFilePath,
                  cert_reqs=ssl.CERT_REQUIRED,
                  tls_version=ssl.PROTOCOL_TLSv1_2,
                  ciphers=None)

# User name and password not used with ASW IoT when certificate is used for authentication
#rpiclient.username_pw_set(username, password)
rpiclient.tls_insecure_set(True)

# connection flag indicates that connection was made or not
mqtt.Client.connected_flag = False

# connection parameters are incorrect: ip address, port, authentication, etc
mqtt.Client.bad_connection_params=False

#assign function to callback
rpiclient.on_connect = on_connect

#assign function to callback
rpiclient.on_publish = on_publish

# bind the disconnect callback   
rpiclient.on_disconnect = on_disconnect

rpiclient.loop_start()

rpiclient.will_set("dwm/position", "Client PahoClient-on-RPi had unexpectedly disconnected", 1, True)

try:
    print("Connecting to MQTT broker ",broker)
    # Connect to the MQTT Broker
    rpiclient.connect(broker, port)
    time.sleep(1)

    # Wait in a loop until we are connected
    print("mqtt.Client.connected_flag={}, mqtt.Client.bad_connection_params={}", mqtt.Client.connected_flag, mqtt.Client.bad_connection_params)
    while mqtt.Client.connected_flag == False and mqtt.Client.bad_connection_params == False:
        print("Waiting for connection...");
        time.sleep(1)
    if mqtt.Client.bad_connection_params == True:
        rpiclient.loop_stop()
        sys.exit()

except Exception as ex:
    print("Connection to MQTT Broker failed: ", ex)

rpiclient.loop_stop()

# Disconnect MQTT Client
rpiclient.disconnect()

有任何线索吗？

将M2MQTT Paho Python客户端连接到AWS IoT

0 个答案: