樹莓派3b Node-red dashboard 第一個測試程序

代碼: [{"id":"15d4e229.de9d2e","type":"function","z":"e3aca2b9.00ea7","name":"temperature","func":"str=msg.payload;\nmsg.payload=str.substring(5,9);\nreturn msg;","outputs":1,"noerr":0,"x":470,"y":296.5

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