JSON output represents NaN as literal NaN which is a non-standard extension and causes compatibility issues with PlotJuggler et al

[pavel-kirienko]

Related facontidavide/PlotJuggler#640

Here we should set ignore_nan=True I suppose to ensure that NaN is represented as null:

yakut/yakut/param/formatter.py

Line 112 in 996e646

return lambda data: cast(str, json.dumps(data, ensure_ascii=False, separators=(",", ":"))) + _NEWLINE

[pavel-kirienko]

As a temporary workaround, pipe Yakut output through jq --compact-output --unbuffered, which correctly converts NaN to null. Example:

y sub 100:reg.udral.service.actuator.common.feedback 110:reg.udral.physics.dynamics.rotation.PlanarTs 120:reg.udral.physics.electricity.PowerTs 150:zubax.telega.DQ --sync \
| jq --compact-output --unbuffered \
| nc -u localhost 9870