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Period miss detector

The purpose of this example is to showcase how one can implement a node that (i) expects data at regular intervals and (ii) sends a default value if no data was received within an interval.

How to run

Build

We first generate the different shared libraries of the different nodes.

cd ~/dev/zenoh-flow-examples/period-miss-detector/nodes/rust/ && cargo build --workspace

Update the paths

For each YAML file in the list below, check that the paths and filenames are correct:

  • data-flow.yaml
  • nodes/period-miss-detector.yaml
  • nodes/file-writer.yaml

Launch

1st terminal: Zenoh

cd ~/dev/zenoh && ./target/debug/zenohd -c ~/.config/zenoh-flow/zenoh.json

2nd terminal: Zenoh-Flow daemon

cd ~/dev/zenoh-flow/ && ./target/debug/zenoh-flow-daemon -c ~/.config/zenoh-flow/runtime.yaml

3rd terminal: launch the flow

cd ~/dev/zenoh-flow && ./target/debug/zfctl launch ~/dev/zenoh-flow-examples/period-miss-detector/data-flow.yaml

Then, if the flow was successfully launched, put values at regular intervals:

cd ~/dev/zenoh && ./target/debug/examples/z_put -k "zf/period-miss-detector" -v "3.1416"