how to use ssl in umqtt.simple v1.4.0

[edgexie]

Is there a demo to show how to use ssl in umqtt.simple v1.4.0

[Str34kk]

the procedure is intuitively simple. To initialize an SSL context, employ the following code:

import ssl
ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
ssl_context.verify_mode = ssl.CERT_NONE

If your requirement involves utilizing SSL certificates that are not self-signed, you can direct the context to verify the certificate's location with:
ssl_context.load_verify_locations("path_to_cert")

Following this configuration, incorporate the SSL context as a parameter when establishing your client connection. This can be achieved as shown below:

client = MQTTClient(client_id=clientid, server=hostname, port=port_no, user=user_name, password=passw, keepalive=3600, ssl=ssl_context)
client.connect()

[uiolee]

modified from https://docs.emqx.com/en/cloud/latest/connect_to_deployments/esp32_with_micropython.html#connect-with-ssl-tls

    with open("ca.crt", "rb") as f:
        cadata = f.read()
    ssl_params = dict()
    ssl_params["cert_reqs"] = ssl.CERT_REQUIRED
    ssl_params["cadata"] = cadata
    ssl_params["server_hostname"] = SERVER
    sslctx = ssl.SSLContext(ssl_params)
    client = MQTTClient(CLIENT_ID, SERVER, PORT, USERNAME, PASSWORD, ssl=sslctx)
    client.connect()

[edgexie]

the procedure is intuitively simple. To initialize an SSL context, employ the following code:

import ssl
ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
ssl_context.verify_mode = ssl.CERT_NONE

If your requirement involves utilizing SSL certificates that are not self-signed, you can direct the context to verify the certificate's location with: ssl_context.load_verify_locations("path_to_cert")

Following this configuration, incorporate the SSL context as a parameter when establishing your client connection. This can be achieved as shown below:

client = MQTTClient(client_id=clientid, server=hostname, port=port_no, user=user_name, password=passw, keepalive=3600, ssl=ssl_context)
client.connect()

HI, I test your code, but the REPL tell me the ssl 'module' object has no attribute 'CERT_NONE'.

[edgexie]

modified from https://docs.emqx.com/en/cloud/latest/connect_to_deployments/esp32_with_micropython.html#connect-with-ssl-tls

    with open("ca.crt", "rb") as f:
        cadata = f.read()
    ssl_params = dict()
    ssl_params["cert_reqs"] = ssl.CERT_REQUIRED
    ssl_params["cadata"] = cadata
    ssl_params["server_hostname"] = SERVER
    sslctx = ssl.SSLContext(ssl_params)
    client = MQTTClient(CLIENT_ID, SERVER, PORT, USERNAME, PASSWORD, ssl=sslctx)
    client.connect()

HI, when I run code ssl.CERT_REQUIRED, I get the ERROR

'module' object has no attribute 'CERT_REQUIRED'