Question about flash write on ESP8266

ESPHome
1

Hello,

from reading the docs, I couldn’t get a definitive answer.
Are only globals stored in flash, or also any sensor data (entity states)?
Are only values stored in flash which are explicitly assigned the “restore_value: yes”, or are all values stored when “esp8266_restore_from_flash: true” is defined in the board parameters?

If I understand this correct, in the following example config, only the “global_1” is written to flash, right?

esphome:
  name: node_1
  platform: ESP8266
  board: nodemcu
  esp8266_restore_from_flash: true    #enabling storing in flash

globals:
  - id: global_1
    type: float
    restore_value: yes  #this is the only global I want to restore from flash
  - id: global_2
    type: float

sensor:
  - platform: ultrasonic
    id: sensor_1
    trigger_pin: D1
    echo_pin: D2
    update_interval: 60s

Thanks in advance to anyone who can shed some light on this.

2

I’m reading the docs and half the internet almost two years later and still can’t figure it out. Must be a taboo subject.