Help needed decoding nonjson topic

[RaceMouse-of-Denmark]

Hi,

I have this topic: RaceMow/wlan/rssi -63 which is not a json topic. Is it possible to decode this?
I'm subscribing to the topic RaceMow/# and would like to see a prom_name RSSI with the value -63. Is that at all possible with the latest version?
//Fink

[LeonidEfremov]

Same problem, no expected metrics output:

$ mosquitto_sub -h localhost -p 1883 -t /devices/yandex-weather/controls/temp     
10

my config:

mqtt:
  server: tcp://localhost:1883
  client_id: mqtt_exporter
  topic_path: /devices/+/controls/+
  metric_per_topic_config:
    metric_name_regex: ^\/devices\/(?P<deviceid>.*)\/controls\/(?P<metricname>.*)$
  qos: 0
cache:
  timeout: 24h
metrics:
  - prom_name: yandex_temp
    mqtt_name: temp
    type: gauge

only received_messages metric =(

$ curl http://localhost:9641/metrics -s | grep yandex
received_messages{status="success",topic="/devices/yandex-weather/controls/condition"} 1
received_messages{status="success",topic="/devices/yandex-weather/controls/feels_like"} 1
received_messages{status="success",topic="/devices/yandex-weather/controls/humidity"} 1
received_messages{status="success",topic="/devices/yandex-weather/controls/obs_time"} 1
received_messages{status="success",topic="/devices/yandex-weather/controls/pressure_mm"} 1
received_messages{status="success",topic="/devices/yandex-weather/controls/temp"} 1
received_messages{status="success",topic="/devices/yandex-weather/controls/wind_dir"} 1
received_messages{status="success",topic="/devices/yandex-weather/controls/wind_speed"} 1

it seems that non-json metrics does not work at all.

[LeonidEfremov]

@hikhvar, can you help with this issue?