REGEX in serial binding

Setup, Configuration and Use Items & Sitemaps
1

Hello,
Im new to openhab, and have been struggeling a few days getting my arduino to send sensordata to my raspberry pi running openhabianpi.

Finally I can see the serialstream in the openhab terminal running:;

cat /dev/ttyACM0

Resulting output is the datafeed from the arduino.

p1 -7.10 p1s t1 19.00 t1s l1 46.00 l1s

The values update every 3 seconds.

I then try to add the following line to default.items

“Temp” (Teknisk) { serial="/dev/ttyACM0@9600,REGEX(t1.([0-9.]))" }

This gives me:

[WARN ] [binding.serial.internal.SerialDevice] - Unable to convert regex result 't1 20.00 t1s

l1 41.00 l1s

’ for item Teknisk_Temp to number

Can anyone please help me with the regex-formula?

2 
t1.(\d+.\d+)

You can test your regex online https://regex101.com/

@Tommy_Lian Be aware that the " " definition of serial is a string.
And the \ is the escape sign which lets you use something like " in a string by writing \". As the backslash has a special function you need to escape it, with an escape sign, so \\ wil give you \ in the string.

{ serial="/dev/ttyACM0@9600,REGEX(t1.(\\d+.\\d+))" }

Hopefully this helps.

1 Like
3

Thanks a lot.

The code you posted made sense and worked in regex101.com, but when i added it to the item it still gives error.

this time;

[WARN ] [el.core.internal.ModelRepositoryImpl] - Configuration model ‘default.items’ has errors, therefore ignoring it: [7,80]: mismatched character ‘d’ expecting set null

[7,111]: mismatched input ‘+’ expecting RULE_STRING

[7,114]: missing ‘}’ at ‘d’

[7,115]: mismatched input ‘+’ expecting RULE_ID

[8,39]: missing RULE_ID at ‘" (Teknisk) \t \t{channel="’

[8,91]: missing EOF at ‘"}\r\nNumber Teknisk_PH \t\t\t"’

[12,34]: mismatched character ‘’ expecting ‘"’

4

entry in defaoult .items is
{ serial="/dev/ttyACM0@9600,REGEX(t1.(\d+.\d+))" }

6

That last edit did the trick. Thanks a lot for the help. Regex seems a bit hard to get into. I can use this formula for all my sensors over the serialstream.