Wifi strength not reporting

[chris-y]

The wifi signal strength sensor hasn't been working for a while. Today I noticed this in the log:

2025-09-21 01:10:35.870 ERROR (MainThread) [homeassistant.components.mqtt.entity] Error 'The unit of measurement `%` is not valid together with device class `signal_strength`' when processing MQTT discovery message topic: 'homeassistant/sensor/rpi-mqtt-rpi/rpi_wifi_signal/config', message: '{'state_topic': 'rpi-mqtt-sdrscanner/sdrscanner/wifi_signal', 'unique_id': 'rpi_wifi_signal', 'device': {'identifiers': ['rpi'], 'manufacturer': 'github.com/hjelev', 'model': 'RPi MQTT Monitor 1.2.3', 'sw_version': 'Debian GNU/Linux 13 (trixie)', 'hw_version': 'Raspberry Pi Zero 2 W Rev 1.0\x00 by Raspberry Pi IP:xxx.xxx.xxx.xxx', 'configuration_url': 'https://github.com/hjelev/rpi-mqtt-monitor', 'connections': [['mac', 'XX-XX-XX-XX-XX-XX']], 'name': 'rpi'}, 'icon': 'mdi:wifi', 'unit_of_measurement': '%', 'device_class': 'signal_strength', 'state_class': 'measurement', 'name': 'WiFi Signal'}'

[chris-y]

Should have checked the PRs first! Looks like #233 fixes this.