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timer

Sends a count that goes up by one at a fixed interval.

Properties

  • interval (ms) — the time between messages, in milliseconds. Default 1000. A whole number, 1 or more.

Wiring

Input — none. timer is a source.

Output — a message with payload set to the count, an int: 1, 2, 3 and so on. topic is an empty string.

Behavior

The first message goes out as soon as the flow starts, then one each interval. The interval starts once the previous message has finished going through the chain, so a slow node after the timer, such as a delay, adds its time to every interval.

Each timer node keeps its own count, starting at 1 when the flow starts, even when two share an interval.

Errors

  • The interval is less than 1. Deploy stops with property "intervalMs" 0 is below its minimum, 1, naming the node.
  • The interval isn't a whole number. Deploy stops with "intervalMs" must be a whole number of milliseconds, naming the node.
  • A node error in this node's chain stops the chain. See Reading a node error.