Send / Receive ASCII string through serial port?

[mrk22]

Is there anyway in Mango to send an ASCII string to a serial device and capture the response? I'm trying to connect to a RS-485 thermostat. A sample request for the set temperature of the thermostat would be:

"SN1 SH=?" and the reply would be "SN1 SH=68"

Thanks!

[mlohbihler]

No, not currently. The number of possibilities that people might need from something like this are too vast to build a general data source. You would be much better off building a module in M2M2 specifically for your equipment.

[oja]

Hi,

I tried workaround for this. I create simple JAR with openPort, closePort and sendData method with RxTx library.

This JAR I sent to jre/lib/ext folder with RxTx library.

Last step was create Meta data source point with some field with Cron timing.
In Javascript (Rhino) I wrote import of my JAR and called my methods.

Now I am busy, but I want to create simple example and zip with my serial communicator classes.

It works.

Oja

[oja]

Java script code for ASCII serial

importPackage(com.alarex.serialcommunicator);

var serial = new SerialCommunicator();

var command = 'ati\r\n';

x = serial.openPort("/dev/ttyS0", 115200, 8, 1, SerialCommunicator.PARITY_NONE, SerialCommunicator.FLOWCONTROL_NONE);

//sendDataAsString(String, timeout for response, timeout for last byte from response - detect packet end)
vysledek = serial.sendDataAsString(command,1000,100);


serial.closePort();

return vysledek;

You can call sendDataAsString multiple and return part1+","+part2+"," part3
and split in other fields in datasource.

[oja]

Copy SerialCommunicator.jar to ...jre/lib/ext . RxTx library have to be installed.

After copy you have to restart apache-tomcat.

I attached datapoint settings picture

Attachment: download link

[mrk22]

OJA,

Thank you for the reply and example. I'll give it a try!

[mkhadem]

Oja,

The link to your files are removed or can not be found. Please let me know how I can get your code.

Thanks
Mo

[oja]

Ok, I am attaching it as one ZIP.

Attachment: download link