esphome/tests/integration/fixtures/host_preferences_suspend_resume.yaml

esphome:
  name: test_suspend_resume_device

host:

logger:
  level: DEBUG

api:

preferences:
  id: prefs_syncer
  flash_write_interval: 1s

button:
  - platform: template
    name: "Save Preference"
    on_press:
      - lambda: |-
          // save() only updates the in-memory map; only sync() persists it to disk.
          ESPPreferenceObject pref = global_preferences->make_preference<uint32_t>(0xBEEF);
          uint32_t value = 123;
          if (pref.save(&value)) {
            ESP_LOGI("test", "Preference saved in memory");
          } else {
            ESP_LOGE("test", "Preference save failed");
          }

  - platform: template
    name: "Suspend Syncer"
    on_press:
      - component.suspend: prefs_syncer
      - lambda: |-
          ESP_LOGI("test", "Syncer suspended");

  - platform: template
    name: "Resume Syncer"
    on_press:
      - component.resume: prefs_syncer
      - lambda: |-
          ESP_LOGI("test", "Syncer resumed");