How to add a filter to text_sensor?

ESPHome
1

This is my (non-working) yaml:

text_sensor:

- platform: custom 
#/homeassistant/esphome/uart_read_line_sensor.h
  lambda: |-
    auto my_custom_sensor = new UartReadLineSensor(id(myUART23));
    App.register_component(my_custom_sensor);
    return {my_custom_sensor};
  text_sensors:
    -  id: "odb_tx"
       name: "OBD TX"
  filters:###############Red squiggly line here?
    - prepend: "TX="

- platform: custom
#/homeassistant/esphome/uart_read_line_sensor.h
  lambda: |-
    auto my_custom_sensor = new UartReadLineSensor(id(myUART18));
    App.register_component(my_custom_sensor);
    return {my_custom_sensor};
  text_sensors:  
    -  id: "obd_rx"
       name: "OBD RX"

This: Text Sensor Component doesn’t do it for me!
Regards, M.

2

What about indented like this:

  text_sensors:
    -  id: "odb_tx"
       name: "OBD TX"
       filters:
         - prepend: "TX="
3

Arrggh… I hate this yaml indenting - with a passion!
I had spent ages trying various combinations (honest).
Is there a (linux) IDE that can check this for me? A sort-of LINT for yaml?

Many thanks Tom.
PS - the Documentation I linked in post one has the “filters” at the platform level.

4

There’s the ESPHome add-on editor. It’s pretty good at pointing out errors.

on_press
on_press918Ă—382 9.87 KB

5

Do you mean this one?

image
image576Ă—501 35 KB

6

I don’t think so. Pretty sure they are always at the sensor level (same level as id:). Those examples are for template text sensors.

7

Just my point. Tabs to one level in one context, and at another in another context.
But thanks for pointing out that distinction for me.

Regards, M.

8

Yeah I recall being caught out a few times early on until I realised sensors can be nested in a bit sometimes (when the component supports multiple), and then you need to start from that level.

9

For some reason this note is above the filter section:

https://esphome.io/components/sensor/#sensor-filters
Screenshot 2024-02-04 at 18-07-44 Sensor Component

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