Openhab reset after Modbus bridge activation - Openhabian 4.3.2 (reproducible)

[wiewior (Jacek)]

For a few days I have been fighting with Modbus configuration trying to connect to my Deye Inverter. I came to the point I must ask experts

First: Configuration:

• Raspberry Pi ver.4 with Openhabian
• Openhabian ver. 4.3.2 - stable
• z-vawe - USB adapter
• zigbee - USB adapter
• RS485 USB Adapter KALEA-INFORMATIQUE USB to RS422 RS485 Konverter with FTDI FT232 Chipset and RJ45

openhabian@openhabian:/dev/serial/by-id $ ls -l /dev/serial/by-id/
total 0
lrwxrwxrwx 1 root root 13 Sep  2 16:17 usb-0658_0200-if00 -> ../../ttyACM0
lrwxrwxrwx 1 root root 13 Sep  2 16:21 usb-FTDI_FT232R_USB_UART_A9JVVF0W-if00-port0 -> ../../ttyUSB1
lrwxrwxrwx 1 root root 13 Sep  2 16:17 usb-Itead_Sonoff_Zigbee_3.0_USB_Dongle_Plus_V2_68998d5c510eef11ab39bf2a433abf1e-if00-port0 -> ../../ttyUSB0

The problem:
similar in this post: Modbus communication does not work.. I received the same permission restiction command and figured out about necessery corrections in /etc/default/openhab I made the chabge as following:

EXTRA_JAVA_OPTS="-Xms192m -Xmx768m -XX:+ExitOnOutOfMemoryError -Dgnu.io.rxtx.SerialPorts=/dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A9JVVF0W-if00-port0:/dev/seria>

After the Modbus bridge activation Openhab makes a full reset. In the log file I see the Bridge, pollers and one item came to online - shortly

My things and Items definition:

Bridge modbus:serial:deyeRS485 "Deye RS485 Bridge" [
  port="/dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A9JVVF0W-if00-port0",
  baud=9600,
  dataBits=8,
  stopBits="1.0",
  parity="none",
  encoding="rtu",
  id=0,
  timeBetweenTransactionsMillis=60
] {
  Bridge poller socPoller [ start=37004, length=1, refresh=5000, type="holding" ] {
    Thing data soc "Battery State of Charge" [ readStart="37004", readValueType="int16" ]
  }
}

Number Deye_Batt_SOC "Battery SoC [%d %%]" { channel="modbus:data:deyeRS485:soc:soc:number" }

RS485 converter is connected to Pi. There is no connection to the MODBUS (inverter yet)
Maybe someone can help me to resolve the issue. I wish to have MODBUS Comunication with my Deye inverter

Log files attached:
modbus_log.txt (11.2 KB)

[wiewior (Jacek)]

There is definitively sth wrong with the definition of the /etc/default/openhab
uncommenting my configuration file brings previous problems with permition but there is no reset. What do I do wrong?

Log file attached
modbus_log_2.txt (61.6 KB)

[clark (carlos kantt)]

I followed this guide

How to make symlinks for usb ports in linux (EXTRA_JAVA_OPTS)

Because I did not find a fully working tutorial myself. I am writing this tutorial how I succeeded. SSH in to openHABian. Unplug all usb devices. And run the command. sudo lsusb -v | grep 'idVendor\|idProduct\|iProduct\|iSerial' [17:27:23] openhabian@openhabian-server:~$ sudo lsusb -v | grep 'idVendor\|idProduct\|iProduct\|iSerial' [sudo] password for openhabian: idVendor 0x1d6b Linux Foundation idProduct 0x0003 3.0 root hub iProduct 2 xHCI Host Cont…

Using the full /dev/serial/by-id/name of adapter did not work for me.

[wiewior (Jacek)]

Thank you fro your response. Very useful post. I will definitively go this way.

Meantime I will try to hardcode /dev/ttyUSB1 for RS485 serial converter. I need to see MODBUS connection and first value read out from my inverter.

This does not make openhab resetting.

EXTRA_JAVA_OPTS="-Dgnu.io.rxtx.SerialPorts=/dev/ttyUSB1:/dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A9JVVF0W-if00-port0"

[xsherlock (Maciej Eckstein)]

Hi Jacek, @wiewior

What model of the Deye do you setup? I just start on the 50kW Hybrid and after reading all posts decided to go with the serial RTU option, as I have very bad experience with OH interfacing the TCP/RTU converter that I used in previous install (Solis 50kW hybrid ).

Do you have some up to date Deye doc in English, Can you share your .things and items?

Maciej