I have a sensor gateway which is connected to the serial port. My java program basically a desktop application which is collecting sensor data and storing in a public mysql database. Now I am wanting to access the serial port through internet with a web application which is using the same public mysql database. I have think a bit but I think it is not a proper way. If I would keep a table in the database, if any command is generated through internet via the web application this table store the command for a period of time and my desktop application continuous monitoring the table if data available get the data and pass it through serial port. I am seeking for a proper way to access serial port through internet/cloud which is connected to remote machine or something like an expert opinion.
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That’s certainly the simplest method. Much simpler than say a web service that stores it in memory, or again in the database and you get safety which you wouldn’t get if you just relied on the file system to lock a file. You might need some method of clearing out the output from the DB.