Ioto Events

Ioto will signal important events and conditions using the Ioto runtime signal mechanism.

You can watch for certain conditions to happen and be notified when they do. For example, it can be useful to be notified when the MQTT client connects or disconnects.

You can also use the signal mechanism to create your own conditions on which to watch and signal.

To watch for a condition:

rWatch("mqtt:connect", fn, data);

This will invoke fn() when the condition occurs and will provide the watch data and the signal argument.

void fn(void *data, void *arg) {
    //  Do something
}

Event List

The list of triggered events:

Name	Description	Arguments
app:ready	When the Ioto app is fully initialized.	None
db:change	When a database table value has changed.	A DbChange structure with model, item, params and command that caused the change.
mqtt:connect	When the MQTT connection is established	None
mqtt:disconnect	When the MQTT connection is lost	None

To manually signal a condition, call:

rSignal("mqtt:connect", arg);

To disable watching, call:

rWatchOff("mqtt:connect", fn, data);

This will disable the watch registered with exactly the same arguments.