P1 smartmeter throws errors

[BartSr]

Hi,

Domoticz 2021.1

My smartmeter reports errors as shown below. Baudrate is OK.
Any suggestion how to fix this?

TIA
-Bart

[waltervl]

New cable?
Enexis supplied meter? As there seems to be an issue with it (but should be solved).
Else try to read the P1 telegram and post it here.

[BartSr]

Meter from Stedin.
How can I catch the telegram? Currently the P1 is plugged into the raspberry pi.

[FireWizard]

Hi @ BartSr,

Do you use a L&G E360 smartmeter?

See: viewtopic.php?f=6&t=31593

Regards

[BartSr]

@ FireWizard
Yes indeed L&G E360 smartmeter. I read viewtopic.php?f=6&t=31593.
From that I am not that hopefull the CRC's will get away by any 'user action'

Do you know how I cab catch the telegrams for further analyzing?

-Bart

[FireWizard]

Hi, @BartStr

If you want to see the RAW protocol, do the following:

1. Stop Domoticz, as it will bind the USB port.(sudo service domoticz.sh stop or sudo /etc/init.d/domoticz.sh stop )
2. Issue the following command: "sudo cu -l /<Your serial port device> -s 115200 --parity=none -E q"
Replace "Your serial port device" with your serial (USB) port.

If it returns, that it cannot find the cu command, install it with sudo apt-get install cu minicom.

Regards

[BartSr]

@Firewizzard:
Re "Your serial port device"
What are common names for such (I am not very familar using Linux)
Will that be USB0 or USB1 or USB2 etc? or /dev/ttyUSB0 etc. And what is most easy way to figure out wich USB is in use for it?
KR
-Bart

[FireWizard]

Hello @BartStr
In my opinion the easiest way to find the USB, which is connected to your Smarmeter (using a serial to USB converter) is to follow the next steps.

1. Disconnect the USB cable from the P1 Smart meter on the Raspberry Pi.
2. Issue the command

Code: Select all

lsusb

3. Observe the result.
4. Reconnect the USB cable to the Pi.
5. Repeat step 2
6. Observe the difference. The new line indicate the USB port of the P1 Smart meter.

See also: https://linuxhint.com/list-usb-devices-linux/

I also recommend to create persistent USB.
See:https://www.domoticz.com/wiki/PersistentUSBDevices

Your USB will probably be something like /dev/ttyUSB0 or /dev/ttyUSB1.

Regards

[BartSr]

Thanks a lot. Will be offline a few days and will return with my findings later.
Bart

[BartSr]

Gents,
Kind of black magic or update by Stedin.
All crc errors are gone without intervention by myself.
-Bart

[FireWizard]

Nice, so we can consider this topic as closed.

Regards

[BartSr]

One year later. New Stable Domoticz release 2023.1 and yes.... all CRC's are back again since 2023.1 version

[BartSr]

And then, same as last year errors are gone with the wind.....