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Update trigger help

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Nick O'Leary 2017-06-05 14:01:24 +01:00
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nodes/core/core/89-trigger.html
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@ -63,23 +63,31 @@
</script>
<script type="text/x-red" data-help-name="trigger">
<p>Creates two messages on the output separated by a timeout whenever <i>any</i> <code>msg</code> arrives on the input.</p>
<p>For example, this can be used to toggle a Raspberry PI GPIO pin on and off.</p>
<p>The two output states can be specified as can the duration of the timer.
Either output can be set to a value, or templated from the inbound
<code>msg</code> using mustache syntax. <pre>The payload is {{payload}}</pre></p>
<p>Or you can pass through either the <i>original msg</i> or the <i>latest msg</i> to arrive.</p>
<p>Optionally the timer can be extended by being retriggered... or not.</p>
<p>By setting the first output to <i>nothing</i>, and selecting extend timer - a watchdog timer can be created.
No output will happen as long as repeated inputs occur within the timeout period.</p>
<p>Setting the timer to 0 creates an "infinite" timeout - the first output will happen but the second
never will, and neither can the first be retriggered - so a true one shot.</p>
<p>If a <code>msg.reset</code> property is present, or the <code>msg.payload</code>
matches the optional reset value, any timeout or repeat currently in progress
will be cleared and the second output will not happen.</p>
<p>The node can be set to repeat the input <code>msg</code> at regular intervals until the input changes,
or the node is reset.</p>
<p>The blue status icon will be visible while the node is active.</p>
<p>Sends a message if nothing is received within a set time interval or until reset.</p>
<h3>Inputs</h3>
<dl class="message-properties">
<dt class="optional">reset</dt>
<dd>If a message is received with this property, any timeout or repeat
currently in progress will be cleared and no message triggered.</dd>
</dl>
<h3>Details</h3>
<p>This node can be used to create a timeout within a flow. By default, when
it receives a message, it sends on a message with a <code>payload</code> of <code>1</code>.
It then waits 250ms before sending a second message with a <code>payload</code> of <code>0</code>.
This could be used, for example, to blink an LED attached to a Raspberry PI GPIO pin.</p>
<p>The payloads of each message sent can be configured to a variety of values, including
the option to not send anything. For example, setting the initial message to <i>nothing</i> and
selecting the option to extend the timer with each received message, the node will
act as a watchdog timer; only sending a message if nothing is received within the
set interval.</p>
<p>If set to a <i>string</i> type, the node supports the mustache template syntax.</p>
<p>If the node receives a message with a <code>reset</code> property, or a <code>payload</code>
that matches that configured in the node, any timeout or repeat currently in
progress will be cleared and no message triggered.</o>
<p>The node can be configured to resend a message at a regular interval until it
is reset by a received message.</p>
</script>
<script type="text/javascript">