Not able to connect to AWSIotMqttManager

When trying to connect the AWSIotMqttManager using accessToken, accessKey and sessionToken for authentication. Getting this issue

"IOT Reconnecting + MqttException (0) - java.io.IOException: WebSocket Response header: Incorrect upgrade" 

Can you please provide us a documentation for Android, iOS and Web for IoT authentication using awsAccessKey and awsSecreteKey. Android SDK: https://github.com/aws-amplify/aws-sdk-android