rename folder

components/empty_spi_sensor/README.md

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+```yaml
+# example configuration:
+
+sensor:
+  - platform: empty_spi_sensor
+    name: Empty SPI sensor
+    cs_pin: D8
+    
+spi:
+  clk_pin: D5
+  miso_pin: D6
+```

components/empty_spi_sensor/empty_spi_sensor.cpp

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+#include "esphome/core/log.h"
+#include "empty_spi_sensor.h"
+
+namespace esphome {
+namespace empty_spi_sensor {
+
+static const char *TAG = "empty_spi_sensor.sensor";
+
+void EmptySPISensor::setup() {
+
+}
+
+void EmptySPISensor::update() {
+
+}
+
+void EmptySPISensor::loop() {
+
+}
+
+void EmptySPISensor::dump_config(){
+    ESP_LOGCONFIG(TAG, "Empty SPI sensor");
+}
+
+}  // namespace empty_spi_sensor
+}  // namespace esphome

components/empty_spi_sensor/empty_spi_sensor.h

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+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/sensor/sensor.h"
+#include "esphome/components/spi/spi.h"
+
+namespace esphome {
+namespace empty_spi_sensor {
+
+class EmptySPISensor : public sensor::Sensor,
+                       public PollingComponent,
+                       public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_LOW, spi::CLOCK_PHASE_LEADING,
+                                            spi::DATA_RATE_1KHZ> {
+ public:
+  void setup() override;
+  void update() override;
+  void loop() override;
+  void dump_config() override;
+};
+
+}  // namespace empty_spi_sensor
+}  // namespace esphome

components/empty_spi_sensor/sensor.py

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+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import spi, sensor
+from esphome.const import CONF_ID, ICON_EMPTY, UNIT_EMPTY
+
+DEPENDENCIES = ['spi']
+
+empty_spi_sensor_ns = cg.esphome_ns.namespace('empty_spi_sensor')
+EmptySPISensor = empty_spi_sensor_ns.class_('EmptySPISensor', cg.PollingComponent,
+                                  spi.SPIDevice)
+
+CONFIG_SCHEMA = sensor.sensor_schema(UNIT_EMPTY, ICON_EMPTY, 1).extend({
+    cv.GenerateID(): cv.declare_id(EmptySPISensor),
+}).extend(cv.polling_component_schema('60s')).extend(spi.spi_device_schema())
+
+
+def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    yield cg.register_component(var, config)
+    yield sensor.register_sensor(var, config)
+    yield spi.register_spi_device(var, config)
+