Documents directory:
1) The client connector
CZGL.AliIoTClient, there are two things aliyun connected to the server:
public CZGL.AliIoTClient.ConnectCode ConnectIoT(string[] SubTopic, [byte[] QOS = null], [ushort keepAlivePeriod = 60]) public System.Threading.Tasks.Task<CZGL.AliIoTClient.ConnectCode> ConnectIoTAsync(string[] topics, [byte[] QOS = null], [ushort keepAlivePeriod = 60]) Parameters and return value:
| parameter name | Types of | Explanation |
|---|---|---|
| SubTopic | string[] | To subscribe to the Topic list, only to subscribe to this Topic, will receive the server push this Topic |
| QOS | byte[] | Each Topic can configure a QOS, if empty, will be set up for each Topic QOS = 0x00, note QOS 0,1,2 only three types so using the most appropriate byte |
| keepAlivePeriod | ushort | Alive monitoring period, MQTT communication requirements of each interval of time, client feedback, to prove the survival of the client, over this period, the server assumes that the client has been dropped. |
| return value | ConnectCode | It is connected to the return status code, enumerated types, because even if a key error, network disconnection caused by a connection failure will not trigger an exception, it returns a status code |
Topic Each attribute has a QOS, the QOS SubTopic length and should be consistent, but also the position corresponding to the index.
QOS meanings:
- QOS = 0, at most once
- QOS = 1, at least once
- QOS = 2, only once
ConnectCode：
When a client tries to establish a connection with the server, may succeed or fail, then returns specific information about the connection status, ConnectCode enumeration as follows:
| Enumeration name | Enumeration values | Explanation |
|---|---|---|
| conn_accepted | 0x00 | connection succeeded |
| conn_refused_prot_vers | 0x01 | Protocol Version |
| conn_refused_ident_rejected | 0x02 | Certification was denied |
| conn_refused_server_unavailable | x03 | Server 403/404, etc. |
| conn_refused_username_password | 0x04 | Account password error |
| conn_refused_not_authorized | 0x05 | Not authorized |
| unknown_error | 0x06 | Other unknown error |
Example:
var code = client.ConnectIoT(topics, null, 60);
Console.WriteLine("连接状态：" + code); 2) Disconnect
public bool ConnectIoTClose() Disconnected, completely release AliIoTClientJson objects, not just offline To reconnect, re-new object;
Example:
client.ConnectIoT(topics,null,60);
3) Check the status
See if the client remains connected to the server:
public bool isConnected { get; }
Example:
Console.WriteLine("是否与服务器连接保持连接：" + client.isConnected);