how to extract data from mongodb using node red with condition that no duplicate data and it should pass every 30sec

Question

MTLinki doesn’t support MQTT protocol for extraction of the data, although there are 2 ways to extract data from MTLinki database so i m using mongodb

1. i m using nodered in manufacturing connect edge

2. to extract Fanuc Server DB at every 30 using mongo db connection

3. then convert this data into the output JSON format

4. i need entire architecture with all sort of coding

5. i have host name , port , username, psrwd, database name and collection name