Simple Gate Function Node
The function node will pass all msgs by default but if it receives a msg with topic gate with payload false, then it will block any other msgs received until it receives another msg with topic gate with a payload of true
It doesn't pass the gate topic messages at all
[{"id":"50e9060d.36c2b8","type":"function","z":"ed0f5786.2ba6d8","name":"Gate","func":"if (context.get('gate') !== false ) {\n context.set('gate', true);\n}\n\nif (msg.topic == \"gate\") {\n context.set('gate',msg.payload);\n return;\n}\n\nif (context.get('gate') === true ) {\n return msg;\n}\nreturn;","outputs":1,"noerr":0,"x":430,"y":180,"wires":[["e0ef21b1.28f81"]]}]
