Sensors not working when MAC address characters written in lower case

[theliquid]

Hi,
I just discovered that my Xiaomi BLE sensors don't work, when I write the characters in the MAC address in the configuration.yaml file in lower case.
Since writing the MAC address in lower case is a common practice, this seems to be a bug.

[Ernst79]

Can confirm the bug. It’s also happening in the UI configuration. When I change the upper case MAC to a lower case MAC, It will create additional entities with _2 at the end in the unique ID (sensor name is lower case) but it won’t update these, it will keep on updating the old ones with the upper case names.

[Ernst79]

Hmm, if I add a new sensor with lower case MAC, is does seem to works OK. Looking further....

[Ernst79]

Now, I tried with YAML.

ble_monitor:
  hci_interface: 0
  bt_auto_restart: False
  active_scan: False
  discovery: False
  period: 60
  use_median: False
  decimals: 1
  log_spikes: False
  restore_state: False
  report_unknown: False
  devices:
    # sensor
    - mac: 'a4:c3:38:5d:18:b4'
      name: 'Livingroom'
      encryption_key: 'b9ea895fac7eea6d30532432a5123456'
      temperature_unit: C
      decimals: 2
      use_median: False
      restore_state: default

It's working fine.

Could you show me your configuration?

[Ernst79]

Ok, when I remove the sensor name from my YAML config, I see the issue. It seems to initially create the correct entities:

• lower case sensor name: ble temperature a4c1388d18b2
• entity_id: sensor.ble_temperature_a4c1388d18b2

Later on in the process, it creates a second entity of each sensor

• upper case sensor name: ble temperature A4C1388D18B2
• entity_id: sensor.ble_temperature_a4c1388d18b2_2 (note the added _2)

The last one is the one that is being updated with data.

[Ernst79]

I can see the same in the logs.

First with lower case letters

2022-02-20 20:04:50 DEBUG (MainThread) [custom_components.ble_monitor.sensor] async_added_to_hass called for ble temperature a4c1388d18b2
2022-02-20 20:04:50 DEBUG (MainThread) [custom_components.ble_monitor.sensor] async_added_to_hass called for ble humidity a4c1388d18b2
2022-02-20 20:04:50 DEBUG (MainThread) [custom_components.ble_monitor.sensor] async_added_to_hass called for ble battery a4c1388d18b2
2022-02-20 20:04:50 DEBUG (MainThread) [custom_components.ble_monitor.sensor] async_added_to_hass called for ble voltage a4c1388d18b2
2022-02-20 20:04:50 DEBUG (MainThread) [custom_components.ble_monitor.sensor] async_added_to_hass called for ble rssi a4c1388d18b2

and 5 seconds later with upper case letters

2022-02-20 20:04:55 DEBUG (MainThread) [custom_components.ble_monitor.sensor] async_added_to_hass called for ble temperature A4C1388D18B2
2022-02-20 20:04:55 DEBUG (MainThread) [custom_components.ble_monitor.sensor] async_added_to_hass called for ble humidity A4C1388D18B2
2022-02-20 20:04:55 DEBUG (MainThread) [custom_components.ble_monitor.sensor] async_added_to_hass called for ble battery A4C1388D18B2
2022-02-20 20:04:55 DEBUG (MainThread) [custom_components.ble_monitor.sensor] async_added_to_hass called for ble voltage A4C1388D18B2
2022-02-20 20:04:55 DEBUG (MainThread) [custom_components.ble_monitor.sensor] async_added_to_hass called for ble rssi A4C1388D18B2

[Ernst79]

I tried it a second, third and 4th time, and now it only adds the sensor with uppercase letters, with exactly the same config. Working fine.

Edit. Ok, it only goes wrong if the sensor is already added, and you remove the name. Steps to reproduce. First add a sensor with a name (e.g. Livingroom), Next, remove the line with name: "Livingroom" from YAML, and restart HA. After that, it will create the lowercase and uppercase sensors.

I'll look further tomorrow.

[Ernst79]

Fixed in beta version 7.9.0-beta. Could you check if it works for you?

[theliquid]

Works for me with the beta version! Thanks!

[Ernst79]

Fixed as final in 7.9.2