Gateway MQTT Transport Callbacks#
These callbacks are contributed by the Gateway MQTT Transport plugin.
Functions#
MQTT client state is changed.
MQTT message arrived.
Function Documentation#
emberAfPluginTransportMqttStateChangedCallback#
void emberAfPluginTransportMqttStateChangedCallback (EmberAfPluginTransportMqttState state)
MQTT client state is changed.
N/A | state | Contains the new and current EmberAfPluginTransportMqttState state. |
This function is called when the state of the MQTT client changes.
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emberAfPluginTransportMqttMessageArrivedCallback#
bool emberAfPluginTransportMqttMessageArrivedCallback (const char * topic, const char * payload)
MQTT message arrived.
N/A | topic | A string containing the topic for the message that arrived. While the underlying MQTT libraries allow NULL characters in a topic, NULL characters are not supported in this implementation so the |
N/A | payload | A string containing the payload for the message that arrived. |
This function is called when the MQTT client for the gateway receives an incoming message on a topic. If the message is processed by the application, return true. If the message is not processed, return false. This function is called on a separate thread, so no stack calls should be made within the implementation of this function. Instead, use a global variable in that function to communicate the message arrival to a stack event or timer running from the main loop.
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