[{"id":"19d8c6fadea93ef9","type":"tab","label":"tcp-in","disabled":false,"info":"","env":[]},{"id":"1787daf384b3888d","type":"tcp in","z":"19d8c6fadea93ef9","name":"","server":"server","host":"","port":"28001","datamode":"stream","datatype":"buffer","newline":"","topic":"","trim":false,"base64":false,"tls":"","x":240,"y":160,"wires":[["741ee8031febd4d5","ace10560e9081352"]]},{"id":"ace10560e9081352","type":"debug","z":"19d8c6fadea93ef9","name":"debug 67","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":480,"y":140,"wires":[]},{"id":"566014e0c80e8a46","type":"tcp out","z":"19d8c6fadea93ef9","name":"","host":"","port":"","beserver":"reply","base64":true,"end":false,"tls":"","x":510,"y":260,"wires":[]},{"id":"741ee8031febd4d5","type":"function","z":"19d8c6fadea93ef9","name":"function 21","func":"","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":330,"y":240,"wires":[["566014e0c80e8a46"]]},{"id":"ccaa2e6ab665534b","type":"debug","z":"19d8c6fadea93ef9","name":"debug 68","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":520,"y":380,"wires":[]},{"id":"592dc0b3b52e8c6d","type":"tcp in","z":"19d8c6fadea93ef9","name":"","server":"client","host":"localhost","port":"28001","datamode":"stream","datatype":"buffer","newline":"","topic":"","trim":false,"base64":false,"tls":"","x":250,"y":360,"wires":[["ccaa2e6ab665534b"]]}]
There are two nodes, First is TCP-IN server, listen 28001, and the second node connected to it.
And the function21 node send nothing.
But the second node will repeatedly received those [72,67,0,202,...] data. But as above image shows, The Tcp:28001 node and following function node send noting.
So where these [72,67,0,202....] comes from?