Update minimum ESPHome version requirements.

README.md

@@ -49,7 +49,7 @@ aspect of the lamp and to integrate the lamp in your Home Assistant setup.
 
 For those who have experience with flashing ESPHome onto devices:
 
-* Make sure you are using ESPHome 2021.8.0 or newer.
+* Make sure you are using ESPHome 2021.10.0 or newer.
 * Copy [`example.yaml`](example.yaml) to `<CONFIG_DIR>/<NODE_NAME>.yaml`.
 * Modify the configuration to your needs (see the [configuration guide](doc/configuration.md)).
 * Compile the `firmware.bin` file and download it to the device to which you have connected your

doc/installation.md

@@ -2,7 +2,7 @@
 
 # Installation guide
 
-The code must be compiled into a firmware using ESPHome 2021.8.0 or later. Therefore, a prerequisite
+The code must be compiled into a firmware using ESPHome 2021.10.0 or later. Therefore, a prerequisite
 is that you have ESPHome up and running in some form (command line, docker container, web dashboard,
 possibly from within Home Assistant as an add-on). For information on this, please refer to the
 documentation on the [ESPHome website](https://esphome.io).