Test serial communication in HA OS?

Installation Home Assistant OS
1

HA OS 5.14
Core 2021.3.4


Example shows: sudo minicom -D /dev/ttyACM0
When I run it in terminal then nothing works. sudo, apt-get, minicom, picocom
When I enabled in configuration.yaml:
  • platform: serial
    name: APC UPS CS 500
    serial_port: /dev/ttyUSB0
    The HA crashed. Had to disconnect serial cable and reboot couple of times.
    How to test serial communication?
2

hello
is your os under debian (ubuntu) or alpine?
supervised installation are under alpine.
debian-ubuntu: sudo apt-get …
alpine: apk …
that’s not the same linux.

try

apk update
apk add minicom
4

You need to show your logs.

5

Thanks. That worked.

6

After running:
apk update
apk add minicom
minicom -D /dev/ttyUSB0

The HA terminal stops. HA goes in to reboot and next time the command is not available.

7

Are you sure /dev/ttyUSB0 is the correct device?

8
  • name: ttyUSB0
    sysfs: >-
    /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0/tty/ttyUSB0
    dev_path: /dev/ttyUSB0
    subsystem: tty
    by_id: /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A9034F0V-if00-port0
    attributes:
    DEVLINKS: >-
    /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A9034F0V-if00-port0
    /dev/serial/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.2:1.0-port0
    DEVNAME: /dev/ttyUSB0
    DEVPATH: >-
    /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.2/1-1.2:1.0/ttyUSB0/tty/ttyUSB0
    ID_BUS: usb
    ID_MODEL: FT232R_USB_UART
9

If you unplug the physical device does /dev/ttyUSB0 disappear? You can get info from gmesg and lsusb

10

INFO (MainThread) [supervisor.hardware.monitor] Detecting HardwareAction.REMOVE serial hardware /dev/ttyUSB0 - /dev/serial/by-id/usb-FTDI_FT232R_USB_UART_A9034F0V-if00-port0
INFO (MainThread) [supervisor.hardware.monitor] Detecting HardwareAction.REMOVE usb hardware /dev/bus/usb/001/003

11

Bus 001 Device 006: ID 0403:6001
Disapeared.
And re appeared. When added.