Connection problem (Method "WriteValue" with signature .., doesn't exist)

[dotevo]

Hello,

I'm using DalyBMS and it works with this addon, but after some time (sometimes a few hours, sometimes few days) it has an error. Only workaround is to restart addon from HA. After that it is connecting to bms again and it works for a some time.

Is it possible to reconnect to bms if this error is detected? I have 2 BMSes connected and I can see that sometimes only one works, usually if this error happens, I cannot see a new data on entity:

ERROR    [sampling.py:125] daly1 error: [org.freedesktop.DBus.Error.UnknownObject] Method "WriteValue" with signature "aya{sv}" on interface "org.bluez.GattCharacteristic1" doesn't exist
INFO     [sampling.py:51] bms debug data: %s
ERROR    [main.py:85] Error (num 9) reading BMS: [org.freedesktop.DBus.Error.UnknownObject] Method "WriteValue" with signature "aya{sv}" on interface "org.bluez.GattCharacteristic1" doesn't exist
ERROR    [main.py:86] Stack: Traceback (most recent call last):
  File "/app/main.py", line 81, in fetch_loop
    await fn()
  File "/app/bmslib/sampling.py", line 47, in __call__
    return await self.sample()
  File "/app/bmslib/sampling.py", line 69, in sample
    sample = await bms.fetch()
  File "/app/bmslib/daly.py", line 124, in fetch
    status = await self._fetch_status()
  File "/app/bmslib/daly.py", line 150, in _fetch_status
    response_data = await self._q(0x93)
  File "/app/bmslib/daly.py", line 107, in _q
    await self.client.write_gatt_char(self.UUID_TX, msg)
  File "/usr/lib/python3.10/site-packages/bleak/backends/bluezdbus/client.py", line 945, in write_gatt_char
    assert_reply(reply)
  File "/usr/lib/python3.10/site-packages/bleak/backends/bluezdbus/utils.py", line 23, in assert_reply
    raise BleakDBusError(reply.error_name, reply.body)
bleak.exc.BleakDBusError: [org.freedesktop.DBus.Error.UnknownObject] Method "WriteValue" with signature "aya{sv}" on interface "org.bluez.GattCharacteristic1" doesn't exist
ERROR    [sampling.py:125] DalyBMS24 error: [org.freedesktop.DBus.Error.UnknownObject] Method "WriteValue" with signature "aya{sv}" on interface "org.bluez.GattCharacteristic1" doesn't exist
INFO     [sampling.py:51] bms debug data: %s
ERROR    [main.py:85] Error (num 10) reading BMS: [org.freedesktop.DBus.Error.UnknownObject] Method "WriteValue" with signature "aya{sv}" on interface "org.bluez.GattCharacteristic1" doesn't exist
ERROR    [main.py:86] Stack: Traceback (most recent call last):
  File "/app/main.py", line 81, in fetch_loop
    await fn()
  File "/app/bmslib/sampling.py", line 47, in __call__
    return await self.sample()
  File "/app/bmslib/sampling.py", line 69, in sample
    sample = await bms.fetch()
  File "/app/bmslib/daly.py", line 124, in fetch
    status = await self._fetch_status()
  File "/app/bmslib/daly.py", line 150, in _fetch_status
    response_data = await self._q(0x93)
  File "/app/bmslib/daly.py", line 107, in _q
    await self.client.write_gatt_char(self.UUID_TX, msg)
  File "/usr/lib/python3.10/site-packages/bleak/backends/bluezdbus/client.py", line 945, in write_gatt_char
    assert_reply(reply)
  File "/usr/lib/python3.10/site-packages/bleak/backends/bluezdbus/utils.py", line 23, in assert_reply
    raise BleakDBusError(reply.error_name, reply.body)
bleak.exc.BleakDBusError: [org.freedesktop.DBus.Error.UnknownObject] Method "WriteValue" with signature "aya{sv}" on interface "org.bluez.GattCharacteristic1" doesn't exist
ERROR    [sampling.py:125] daly1 error: [org.freedesktop.DBus.Error.UnknownObject] Method "WriteValue" with signature "aya{sv}" on interface "org.bluez.GattCharacteristic1" doesn't exist
INFO     [sampling.py:51] bms debug data: %s
ERROR    [main.py:85] Error (num 10) reading BMS: [org.freedesktop.DBus.Error.UnknownObject] Method "WriteValue" with signature "aya{sv}" on interface "org.bluez.GattCharacteristic1" doesn't exist
ERROR    [main.py:86] Stack: Traceback (most recent call last):
  File "/app/main.py", line 81, in fetch_loop
    await fn()
  File "/app/bmslib/sampling.py", line 47, in __call__
    return await self.sample()
  File "/app/bmslib/sampling.py", line 69, in sample
    sample = await bms.fetch()
  File "/app/bmslib/daly.py", line 124, in fetch
    status = await self._fetch_status()
  File "/app/bmslib/daly.py", line 150, in _fetch_status
    response_data = await self._q(0x93)
  File "/app/bmslib/daly.py", line 107, in _q
    await self.client.write_gatt_char(self.UUID_TX, msg)
  File "/usr/lib/python3.10/site-packages/bleak/backends/bluezdbus/client.py", line 945, in write_gatt_char
    assert_reply(reply)
  File "/usr/lib/python3.10/site-packages/bleak/backends/bluezdbus/utils.py", line 23, in assert_reply
    raise BleakDBusError(reply.error_name, reply.body)
bleak.exc.BleakDBusError: [org.freedesktop.DBus.Error.UnknownObject] Method "WriteValue" with signature "aya{sv}" on interface "org.bluez.GattCharacteristic1" doesn't exist
ERROR    [sampling.py:125] DalyBMS24 error: [org.freedesktop.DBus.Error.UnknownObject] Method "WriteValue" with signature "aya{sv}" on interface "org.bluez.GattCharacteristic1" doesn't exist
INFO     [sampling.py:51] bms debug data: %s
ERROR    [main.py:85] Error (num 11) reading BMS: [org.freedesktop.DBus.Error.UnknownObject] Method "WriteValue" with signature "aya{sv}" on interface "org.bluez.GattCharacteristic1" doesn't exist
ERROR    [main.py:86] Stack: Traceback (most recent call last):
  File "/app/main.py", line 81, in fetch_loop
    await fn()
  File "/app/bmslib/sampling.py", line 47, in __call__
    return await self.sample()
  File "/app/bmslib/sampling.py", line 69, in sample
    sample = await bms.fetch()
  File "/app/bmslib/daly.py", line 124, in fetch
    status = await self._fetch_status()
  File "/app/bmslib/daly.py", line 150, in _fetch_status
    response_data = await self._q(0x93)
  File "/app/bmslib/daly.py", line 107, in _q
    await self.client.write_gatt_char(self.UUID_TX, msg)
  File "/usr/lib/python3.10/site-packages/bleak/backends/bluezdbus/client.py", line 945, in write_gatt_char
    assert_reply(reply)
  File "/usr/lib/python3.10/site-packages/bleak/backends/bluezdbus/utils.py", line 23, in assert_reply
    raise BleakDBusError(reply.error_name, reply.body)
bleak.exc.BleakDBusError: [org.freedesktop.DBus.Error.UnknownObject] Method "WriteValue" with signature "aya{sv}" on interface "org.bluez.GattCharacteristic1" doesn't exist

[bruceborrett]

I am having the exact same issue, works for a couple hours then the above error starts to appear. After googling around a bit it seems it may have something to do with the bluez version (and ultimately, the version of homeassistant). I am going to try and debug further and will post my results.

[fl4p]

I have similar issue running on native arch linux (armv7a, RPI3). Can't power cycle BT hardware, even with rfkill. After power down and up bluetoothctl fails with NotReady error. The only solution I found was to reboot.

[fl4p]

Enabling option install_newer_bleak probably fixes this.