...
µC/MQTT-client provides the function MQTTc_MsgSetParam to configure parameters related to the MQTT message. The function takes as argument the type of parameter and the pointer to the parameter. The following parameter types are available :
| Panel |
|---|
| title | Table - MQTTc Message Parameters |
|---|
|
| Parameter Type | Description |
|---|
MQTTc_PARAM_TYPE_MSG_BUF_PTR | Sets the Message's buffer start. | MQTTc_PARAM_TYPE_MSG_BUF_LEN | Sets the Message's maximum buffer length. |
|
Example
| Code Block |
|---|
| language | cpp |
|---|
| title | Listing - MQTTc Message Configuration Example |
|---|
| linenumbers | true |
|---|
|
static MQTTc_MSG AppMQTTc_Msg;
static CPU_INT08U AppMQTTc_MsgBuf[APP_MQTTc_MSG_LEN_MAX];
CPU_BOOLEAN App_MQTTc_MsgPrepare (void)
{
MQTTc_ERR err;
/* ----------------- INIT NEW MESSAGE ----------------- */
MQTTc_MsgClr(&AppMQTTc_Msg, &err);
if (err != MQTTc_ERR_NONE) {
return (DEF_FAIL);
}
MQTTc_MsgSetParam(&AppMQTTc_Msg, MQTTc_PARAM_TYPE_MSG_BUF_PTR, (void *)&AppMQTTc_MsgBuf[0u], &err);
if (err != MQTTc_ERR_NONE) {
return (DEF_FAIL);
}
MQTTc_MsgSetParam(&AppMQTTc_Msg, MQTTc_PARAM_TYPE_MSG_BUF_LEN, (void *)APP_MQTTc_MSG_LEN_MAX, &err);
if (err != MQTTc_ERR_NONE) {
return (DEF_FAIL);
}
return (DEF_OK);
} |