MCP3204 4-channel 12-bit ADC component (#2895)

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

esphome/components/mcp3204/sensor/__init__.py

@@ -0,0 +1,32 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import sensor, voltage_sampler
+from esphome.const import CONF_ID, CONF_NUMBER
+from .. import mcp3204_ns, MCP3204
+
+AUTO_LOAD = ["voltage_sampler"]
+
+DEPENDENCIES = ["mcp3204"]
+
+MCP3204Sensor = mcp3204_ns.class_(
+    "MCP3204Sensor", sensor.Sensor, cg.PollingComponent, voltage_sampler.VoltageSampler
+)
+CONF_MCP3204_ID = "mcp3204_id"
+
+CONFIG_SCHEMA = sensor.SENSOR_SCHEMA.extend(
+    {
+        cv.GenerateID(): cv.declare_id(MCP3204Sensor),
+        cv.GenerateID(CONF_MCP3204_ID): cv.use_id(MCP3204),
+        cv.Required(CONF_NUMBER): cv.int_range(min=0, max=3),
+    }
+).extend(cv.polling_component_schema("60s"))
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(
+        config[CONF_ID],
+        config[CONF_NUMBER],
+    )
+    await cg.register_parented(var, config[CONF_MCP3204_ID])
+    await cg.register_component(var, config)
+    await sensor.register_sensor(var, config)