CATV Sensor problem

Help
1

Hi,
I’m working on new sensor for several devices like CMTS, RF Input tuners, cable modems etc. I have problem with sensor listed at documentation. There is dBm (dBm), signal (dBm) and SNR (dB). I’ve working with dBmV (cable modems) and dBµV (measure devices, DVB tuners)
https://www.maximintegrated.com/en/app-notes/index.mvp/id/808
that values are available directly on devices via SNMP. I do not want to convert them because they will be unintuitive in the CATV area. How can I add these sensors?
Best regards
Maciej

2

you will need to submit a git hub issue with all the required info -

or you can code them yourself…

3

So you can add additional sensor types. Here’s a PR I’ve done recently which does this.

SNR: https://github.com/librenms/librenms/pull/6690/files

It has more in it than you need but you should be able to get the idea.

4

Thank you @laf. I saw that at example you send, value of EPC modem is set to dBm instead of dBmV
http://oidref.com/1.3.6.1.2.1.10.127.1.1.1.1.6

5

If what you have matches the type we already record (I.e SNR) but it’s in the wrong value then you’ll need to use the multiplier and divisor to get them to the correct value we expect.