node-red-contrib-batcher 0.3.1

Collects sequences of payloads and send them in a single message.

npm install node-red-contrib-batcher

Node-RED node that collects sequences of payloads and send them in a single message.

Collects message payloads by topic and sends them in a batch (array) when:

  • The number of messages in the given topic reaches the configured maximal value.
  • The number of unique topics in cache crosses the configured limit (flushes the topic of the oldest message in the cache).
  • A message with a non-true payload (false, null, undefined, empty-string...) arrives. If the topic is non-true, all the cache will be flushed, otherwise only the given topic will be flushed.
  • The oldest message in cache of a given topic waits for more than the maximal delay time (use a negative value to disable feature).

New in version 0.1:

  • Debouncer Node. Very similar to the batcher node, but saves and sends only the latest message.

New in version 0.2:

  • Using Maps instead of objects.
  • Rate-Limit Node. Limit the rate of messages per topic.

N32 in version 0.3:

  • Drop Overflow Messages for rate-limit.

Node Info

Version: 0.3.1
Updated 1 year, 4 months ago
License: Apache-v2.0


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  • batcher
  • debouncer
  • rate-limit


  • state
  • node-red


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