<![CDATA[REGEX with Serial Input Data Point]]>In my lab I periodically run a moisture test on the germination and kilning of the malt. I use a moisture balance that outputs the test results as ASCII text on a RS232 serial port. I need some help extracting the moisture value from the output strings to enter as a data point.

The output looks like this:

***** AUTO STOP *****
LAST TEMP: 131 C
FINAL MASS: 12.215 g
TEST TIME: 56:15
MASS LOST: 8.531 g
RESULT: 41.12 %M
----------------------------- (the dashes are mine)
I need to extract just the value (in this case 41.12) from the "RESULT:" line using REGEX. I am NOT very good with regular expressions and have been pulling my hair out all morning. The best I have come up with is: "/RESULT:\s*([\d][\d].[\d][\d])\s%M*/g" but that selects the entire line, not just the value. Any help would be very appreciated.

]]>https://forum.mango-os.com/topic/3183/regex-with-serial-input-data-pointRSS for NodeFri, 12 Jun 2026 14:41:21 GMTWed, 03 Jan 2018 18:01:32 GMT60<![CDATA[Reply to REGEX with Serial Input Data Point on Thu, 04 Jan 2018 16:18:09 GMT]]>Hi Tom,

At the bottom of the edit point page is a section for event detectors. You're either looking for a Change or Update detector. After the event detector is created, you will need to create an Email event handler on the /event_handlers.shtm page for the event, and you will need to configure your SMTP server in the system settings.

]]>https://forum.mango-os.com/post/16716https://forum.mango-os.com/post/16716Thu, 04 Jan 2018 16:18:09 GMT<![CDATA[Reply to REGEX with Serial Input Data Point on Thu, 04 Jan 2018 16:34:21 GMT]]>I connected the moisture balance as a serial data source and it works. I get the percent moisture value as an alpha-numeric which is fine for logging. I don't need any charting. I changed the Regex to include "%M" so a unit is displayed when looking at point details.

The data source (moisture balance RS232) sends a 0x04 (EOT End Of Transmission) at the end of each message. If I try to use a terminator string of 0x04 it won't work. If I ignore the terminator it does work, so no big deal. Just curious why I cant use the hex value 0x04 as a terminator. Is there another encoding that would work?

Now I need to figure out how to have the result emailed to me when the data point is logged.
Tom

]]>https://forum.mango-os.com/post/16715https://forum.mango-os.com/post/16715Thu, 04 Jan 2018 16:34:21 GMT<![CDATA[Reply to REGEX with Serial Input Data Point on Thu, 04 Jan 2018 16:00:39 GMT]]>I was able to get the REGEX tester to duplicate your results and got the value as group 1.

Thanks for your help today, I learned a lot. I plan to connect the serial data source to the Mango server tomorrow. I'll see what happens then.

Tom

]]>https://forum.mango-os.com/post/16711https://forum.mango-os.com/post/16711Thu, 04 Jan 2018 16:00:39 GMT<![CDATA[Reply to REGEX with Serial Input Data Point on Wed, 03 Jan 2018 22:22:33 GMT]]>It shows that value was extracted as group #1, which would be the value group index in Mango.

It looks like I was supposed to have written (\d+\.?\d*) but the \ before the dot was removed the forum's formatting, and so I didn't copy it into the image. But, it would work either way.

]]>https://forum.mango-os.com/post/16710https://forum.mango-os.com/post/16710Wed, 03 Jan 2018 22:22:33 GMT<![CDATA[Reply to REGEX with Serial Input Data Point on Wed, 03 Jan 2018 21:58:41 GMT]]>@phildunlap said in REGEX with Serial Input Data Point:

[^;]+

Strange, I didn't use the spaces after/before the double quotes, they was only to indicate the quotes were not included in the expression I was trying to convey to the reader. But I still don't get a match. Your screen shot shows the entire message was matched, not just the value between "RESULT:" and "%M".

]]>https://forum.mango-os.com/post/16709https://forum.mango-os.com/post/16709Wed, 03 Jan 2018 21:58:41 GMT<![CDATA[Reply to REGEX with Serial Input Data Point on Wed, 03 Jan 2018 21:25:33 GMT]]>Hmm, that is not my experience with that website:
0_1515014650954_myRegexWorks.png

Perhaps it is from the extra spaces inside your quote marks?

]]>https://forum.mango-os.com/post/16708https://forum.mango-os.com/post/16708Wed, 03 Jan 2018 21:25:33 GMT<![CDATA[Reply to REGEX with Serial Input Data Point on Wed, 03 Jan 2018 21:12:58 GMT]]>Thanks Phil,
Yes, I plan to use a Serial Data Source.

I am using a Regex tester at: https://regexr.com/ to work out the correct syntax for getting my desired value into a data point. If I put your suggestion, " [^;]+RESULT: (\d+.?\d*) %M.* " in the tester it shows "no match". I would assume the Mango REGEX parser would perform the same.

]]>https://forum.mango-os.com/post/16707https://forum.mango-os.com/post/16707Wed, 03 Jan 2018 21:12:58 GMT<![CDATA[Reply to REGEX with Serial Input Data Point on Wed, 03 Jan 2018 22:20:51 GMT]]>Hi thutchis,

You are using a serial data source?

It sounds like if you used a value index of 1 instead of 0 you should be extracting your value, currently. You don't need to use the /.../g type format to input the regex, you can enter what would come between the slashes for the serial data source fields.

I always encourage people to do their troubleshooting using a setup that will catch all the values, for your data, that might mean something like...

DATA SOURCE:
Use terminator: No
Message Regex: ()[^;]+
Point Identifier Group: 1
Configuration in Hex: No

DATA POINT:
Data Type: Alphanumeric
Point Identifier:
Value Group: 0
Value Regex [^;]+

I am using [^;]+ because you do not have any semicolons in your example data, so it will match everything. You could probably get the specific value you're looking for with a serial data point setup on that data source like,

DATA POINT:
Data Type: Alphanumeric
Point Identifier:
Value Group: 1
Value Regex [^;]+RESULT: (\d+\.?\d*) %M.*
]]>https://forum.mango-os.com/post/16706https://forum.mango-os.com/post/16706Wed, 03 Jan 2018 22:20:51 GMT