This returns the status of a MQTT connection.
Input:
handle : INT
The handle to the MQTT connection.
Returns: SINT
0
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- Connected to the MQTT server.
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1
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- Invalid MQTT connection.
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2
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- Not connected to MQTT server.
|
3
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- MQTT server not found.
|
4
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- No reply from MQTT server
|
5
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- Connection rejected, unacceptable protocol version.
|
6
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- Connection rejected, client ID rejected.
|
7
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- Connection rejected, server unavailable.
|
8
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- Connection rejected, bad user-name or password.
|
9
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- Connection rejected, not authorized.
|
20
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- Secure connection failed.
|
21
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- Secure connection require client certificate.
|
22
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- Certificate verification failed.
|
23
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- Client certificate is incomplete. (Encryption key or client certificate is missing)
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Declaration:
FUNCTION mqttStatus : SINT;
VAR_INPUT
handle : INT;
END_VAR;
Example:
INCLUDE rtcu.inc
VAR
mqtt : INT;
text : STRING;
rc : SINT;
END_VAR;
PROGRAM example;
gsmPower(power := ON);
gprsOpen();
BEGIN
...
IF mqtt < 1 AND gprsConnected() THEN
text := strFormat(format := "RTCU_\4", v4 := boardSerialNumber());
mqtt := mqttOpen(ip := "test.mosquitto.org", port := 8883, clientid := text, useTLS := TRUE);
IF NOT mqttConnected(handle := mqtt) THEN
rc := mqttStatus(handle := mqtt);
DebugFmt(message := "Status=\1", v1 := rc);
END_IF;
END_IF;
...
END;
END_PROGRAM;
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