How to connect to Broker with TCP/TLS with port 8883?

[lygialiem]

Hi team.

Currently, I setup MQTT connection like this:

let mqtt5 = CocoaMQTT5(clientID: "some_clientID", host: "54.179.31.220", port: 8883)
mqtt5.username = userName
mqtt5.password = password
mqtt5.allowUntrustCACertificate = true
mqtt5.enableSSL = true
mqtt5.connect()

but i always get this error: "Socket closed by remote peer". Did i miss something?

Thank you and Best Regard

[leeway1208]

Hi. Make sure your broker config is consistent with your writing code. Thanks.

[JaylinYu]

please find the corresponding TLS/SSL log from broker side, this usually caused by malformed certificate or the version of SSL lib mismatch

[StarkGOD024]

I took several days to solve the set allowUntrustCACertificate = true, unable to connect the SSL problems, finally through the source code, found that need to implement the following method

// Optional ssl CocoaMQTTDelegate
func mqtt(_ mqtt: CocoaMQTT, didReceive trust: SecTrust, completionHandler: @escaping (Bool) -> Void) {
TRACE("trust: (trust)")
/// Validate the server certificate
///
/// Some custom validation...
///
/// if validatePassed {
/// completionHandler(true)
/// } else {
/// completionHandler(false)
/// }
completionHandler(true)
}