Clear display values if nothing recieved

[BurlyOaf]

This is awesome, love your work!
I was wondering though, it may be simple and something I just haven't discovered / learnt.

If say we went out of bluetooth range, could the values displayed go blank until new values are received?

[Fabian-Schmidt]

There is no out of the box way in ESPHome. But it could be added either via a script or into this component.

The idea is you have a script which sets a flag:

script:
  - id: victron_present_reset
    then:
      - delay: 60s
      - globals.set:
          id: victron_present
          value: 'false'

globals:
  - id: victron_present
    type: bool
    restore_value: false
    initial_value: 'false'

And in the on_message event you reset it.

victron_ble:
  - id: MySmartShunt
    mac_address: ${smart_shunt_mac_address}
    bindkey: ${smart_shunt_encryption_key}
    on_message:
      then:
        - lambda: |-
            id(victron_present) = true;
            id(victron_present_reset).stop();
            id(victron_present_reset).execute();

And in the display you check the global variable:

if (!id(victron_present)) {
  // Victron device stale
} else {
  // Victron device fresh
}

[BurlyOaf]

Awesome thanks, I'll give it a whirl, I think I understand the first 3 bits,

but I am not sure on how to use the display bit, does it go straight after (below)
u_int16_t y = first_pad;
?

[Fabian-Schmidt]

The third bit is in the individual display elements. E.g.

Instead of:

      // shunt_AUX_VOLTAGE
      it.printf(x1i, y, id(font_icons_small), TextAlign::BASELINE_CENTER, "\U000F010C");  // mdi-car-battery
      if (!std::isnan(id(shunt_AUX_VOLTAGE).state)) {
        it.printf(x1i + icon_pad, y, id(font_value), TextAlign::BASELINE_LEFT, "%.2f V", id(shunt_AUX_VOLTAGE).state);
      }

You add the victron_present validation:

      // shunt_AUX_VOLTAGE
      it.printf(x1i, y, id(font_icons_small), TextAlign::BASELINE_CENTER, "\U000F010C");  // mdi-car-battery
      if (!std::isnan(id(shunt_AUX_VOLTAGE).state) && id(victron_present)) {
        it.printf(x1i + icon_pad, y, id(font_value), TextAlign::BASELINE_LEFT, "%.2f V", id(shunt_AUX_VOLTAGE).state);
      }

So then the number is only displayed if some value is there and it is not stale.

[BurlyOaf]

Thank you so much for that!
So far it looks to be working, i think :) I added the script: global: and victron_ble: sections you posted, and added " && id(victron_present)" into the display elements, as above.

But, I haven't added this anywhere..?

if (!id(victron_present)) {
// Victron device stale
} else {
// Victron device fresh
}

[Fabian-Schmidt]

This part is a simpler version of the other.
You could instead write: They are functionally identical.

      if (id(victron_present)) {
        if (!std::isnan(id(shunt_AUX_VOLTAGE).state)) {
          it.printf(x1i + icon_pad, y, id(font_value), TextAlign::BASELINE_LEFT, "%.2f V", id(shunt_AUX_VOLTAGE).state);
        }
      }