Implement Improv via Serial component (#2423)

Co-authored-by: Paulus Schoutsen <balloob@gmail.com>

esphome/components/esp32/__init__.py

@@ -28,6 +28,7 @@ from .const import (  # noqa
     KEY_SDKCONFIG_OPTIONS,
     KEY_VARIANT,
     VARIANT_ESP32C3,
+    VARIANT_FRIENDLY,
     VARIANTS,
 )
 from .boards import BOARD_TO_VARIANT
@@ -287,6 +288,7 @@ async def to_code(config):
     cg.add_build_flag("-DUSE_ESP32")
     cg.add_define("ESPHOME_BOARD", config[CONF_BOARD])
     cg.add_build_flag(f"-DUSE_ESP32_VARIANT_{config[CONF_VARIANT]}")
+    cg.add_define("ESPHOME_VARIANT", VARIANT_FRIENDLY[config[CONF_VARIANT]])
 
     cg.add_platformio_option("lib_ldf_mode", "off")
 

esphome/components/esp32/const.py

@@ -18,4 +18,12 @@ VARIANTS = [
     VARIANT_ESP32H2,
 ]
 
+VARIANT_FRIENDLY = {
+    VARIANT_ESP32: "ESP32",
+    VARIANT_ESP32S2: "ESP32-S2",
+    VARIANT_ESP32S3: "ESP32-S3",
+    VARIANT_ESP32C3: "ESP32-C3",
+    VARIANT_ESP32H2: "ESP32-H2",
+}
+
 esp32_ns = cg.esphome_ns.namespace("esp32")