Instance number changes at reboot

[drtinaz]

My apologies if this has been covered elsewhere. I searched but didn't find anything. Describe the bug If the cerbo is reboot for any reason, often times the bms gets assigned a different instance number which then requires changing settings and reconnecting nodes in node red.

To Reproduce Steps to reproduce the behavior: Reboot cerbo, then battery alarm 'low voltage' because bms has been assigned a different number. Seems to bounce back and forth between 1 and 2.

Expected behavior I would expect the bms to always be assigned the same number.

Screenshots If applicable, add screenshots to help explain your problem.

VenusOS (please complete the following information):

• Device type: cerbo gx
• Firmware Version: same behavior on 2.93 and beta 3.00~32

Battery/BMS (please complete the following information):

• BMS/Battery type: Daly
• Cells: 8
• Interface: Daly uart to usb

Additional context I have a rs485 to USB adapter plugged into the first USB port which runs a external relay board. Plugged into the second USB port is a powered USB hub with a mppt on ve.direct to USB, a USb bt dongle, tank140, and the uart Daly adapter. All other devices survive reboots with no issues.

I have posted this issue on the victron board and victrons response is that it is a bms driver issue.

[ramack]

I face similar problems and think that we should allow a dedicated mapping from serialnumbers as read by the low level drivers to instance numbers. That would also help in setups with multiple batteries.

[mr-manuel]

Hello,

please see https://github.com/Louisvdw/dbus-serialbattery/discussions/481 and https://github.com/Louisvdw/dbus-serialbattery/issues/100.