Add integration hydreon_rgxx for rain sensors by Hydreon (#2711)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

esphome/components/hydreon_rgxx/binary_sensor.py

@@ -0,0 +1,36 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import binary_sensor
+from esphome.const import (
+    CONF_ID,
+    DEVICE_CLASS_COLD,
+)
+
+from . import hydreon_rgxx_ns, HydreonRGxxComponent
+
+CONF_HYDREON_RGXX_ID = "hydreon_rgxx_id"
+CONF_TOO_COLD = "too_cold"
+
+HydreonRGxxBinarySensor = hydreon_rgxx_ns.class_(
+    "HydreonRGxxBinaryComponent", cg.Component
+)
+
+
+CONFIG_SCHEMA = cv.Schema(
+    {
+        cv.GenerateID(): cv.declare_id(HydreonRGxxBinarySensor),
+        cv.GenerateID(CONF_HYDREON_RGXX_ID): cv.use_id(HydreonRGxxComponent),
+        cv.Optional(CONF_TOO_COLD): binary_sensor.binary_sensor_schema(
+            device_class=DEVICE_CLASS_COLD
+        ),
+    }
+)
+
+
+async def to_code(config):
+    main_sensor = await cg.get_variable(config[CONF_HYDREON_RGXX_ID])
+    bin_component = cg.new_Pvariable(config[CONF_ID], main_sensor)
+    await cg.register_component(bin_component, config)
+    if CONF_TOO_COLD in config:
+        tc = await binary_sensor.new_binary_sensor(config[CONF_TOO_COLD])
+        cg.add(main_sensor.set_too_cold_sensor(tc))