P1 Smart Meter USB - Gas won't parse

[sunflare]

Hi guys

I have this issue with the 'gas' metric of the P1 Smart Meter.

The Domoticz logs say that the clock is ahead (notice that it's a negative value)


When I check minicom, it does actually provide the gas data:


In the highlighted line, the format appears to be: YYMMDDHHmmss[literal "S"]
My theory is that, the timestamp adds an 'S' for 'Savings' or 'Summer' and this messes up the interpreter within the P1 Smart Meter USB module.

Also, I know that the gas meter DID work during the winter. (So when there was no DST-- Daylights Savings, a.k.a. Winter Time)

I tested this on my own Smart Meter and my friend's, both on Domoticz Stable and on Domoticz Beta. Same results.

Is there anything I can do, or is this a bug?

[FireWizard]

Hi

@sunflare

Your P1 telegram is correct.
Your timestamp is also correct and a S has been added as an indicator for Summer time, so will be during wintertime a W be added.

What you didn't tell, is this time correct?

Did you check your time on the Raspberry?

See: https://www.raspberrypi.org/forums/view ... p?t=178834

Regards

[sunflare]

Yes, time is synced on daily reboot (NTP) and timezone is set to UTC:

Code: Select all

$ date
Sun Jul 19 11:24:22 UTC 2020

So the Smart Meter time is behind by 4 minutes compared to the Pi time, and the Smart Meter provides a CEST timezone rather than UTC.

[FireWizard]

HI,

@sunflare

You wrote:

Yes, time is synced on daily reboot (NTP) and timezone is set to UTC:

This is not correct, your clock on the Raspberry PI should run UTC time, but your TimeZone should be CEST, as you live in The Netherlands.

pi@RPi1:~ $ date
Sun 19 Jul 2020 04:35:56 PM CEST

If you issue the command:

Code: Select all

sudo timedatectl

you should see something like:

Local time: Sun 2020-07-19 16:39:07 CEST
Universal time: Sun 2020-07-19 14:39:07 UTC
RTC time: n/a
Time zone: Europe/Amsterdam (CEST, +0200)
System clock synchronized: yes
NTP service: inactive
RTC in local TZ: no

So, what to do?

1. Set you time to the UTC time, which is currently 2 hours behind CEST (local) time.
2. Set Time Zone to CEST (Amsterdam)
You can do that easily with:

Code: Select all

sudo raspi-config

Goto 4 (Localisation Options) , followed by I2 Change Time Zone, followed by Europe and Amsterdam.

Regards

[sunflare]

Thank you, FireWizard. This works!