mpr121: Add GPIO support (#6776)

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

esphome/components/mpr121/__init__.py

@@ -1,19 +1,32 @@
 import esphome.codegen as cg
 import esphome.config_validation as cv
+import esphome.final_validate as fv
+from esphome import pins
 from esphome.components import i2c
-from esphome.const import CONF_ID
+from esphome.const import (
+    CONF_BINARY_SENSOR,
+    CONF_CHANNEL,
+    CONF_ID,
+    CONF_INPUT,
+    CONF_INVERTED,
+    CONF_MODE,
+    CONF_NUMBER,
+    CONF_OUTPUT,
+)
 
 CONF_TOUCH_THRESHOLD = "touch_threshold"
 CONF_RELEASE_THRESHOLD = "release_threshold"
 CONF_TOUCH_DEBOUNCE = "touch_debounce"
 CONF_RELEASE_DEBOUNCE = "release_debounce"
+CONF_MAX_TOUCH_CHANNEL = "max_touch_channel"
+CONF_MPR121 = "mpr121"
+CONF_MPR121_ID = "mpr121_id"
 
 DEPENDENCIES = ["i2c"]
-AUTO_LOAD = ["binary_sensor"]
 
 mpr121_ns = cg.esphome_ns.namespace("mpr121")
-CONF_MPR121_ID = "mpr121_id"
 MPR121Component = mpr121_ns.class_("MPR121Component", cg.Component, i2c.I2CDevice)
+MPR121GPIOPin = mpr121_ns.class_("MPR121GPIOPin", cg.GPIOPin)
 
 MULTI_CONF = True
 CONFIG_SCHEMA = (
@@ -28,6 +41,7 @@ CONFIG_SCHEMA = (
             cv.Optional(CONF_RELEASE_THRESHOLD, default=0x06): cv.int_range(
                 min=0x05, max=0x30
             ),
+            cv.Optional(CONF_MAX_TOUCH_CHANNEL): cv.int_range(min=3, max=11),
         }
     )
     .extend(cv.COMPONENT_SCHEMA)
@@ -35,11 +49,79 @@ CONFIG_SCHEMA = (
 )
 
 
+def _final_validate(config):
+    fconf = fv.full_config.get()
+    max_touch_channel = 3
+    if (binary_sensors := fconf.get(CONF_BINARY_SENSOR)) is not None:
+        for binary_sensor in binary_sensors:
+            if binary_sensor.get(CONF_MPR121_ID) == config[CONF_ID]:
+                max_touch_channel = max(max_touch_channel, binary_sensor[CONF_CHANNEL])
+    if max_touch_channel_in_config := config.get(CONF_MAX_TOUCH_CHANNEL):
+        if max_touch_channel != max_touch_channel_in_config:
+            raise cv.Invalid(
+                "Max touch channel must equal the highest binary sensor channel or be removed for auto calculation",
+                path=[CONF_MAX_TOUCH_CHANNEL],
+            )
+    path = fconf.get_path_for_id(config[CONF_ID])[:-1]
+    this_config = fconf.get_config_for_path(path)
+    this_config[CONF_MAX_TOUCH_CHANNEL] = max_touch_channel
+
+
+FINAL_VALIDATE_SCHEMA = _final_validate
+
+
 async def to_code(config):
     var = cg.new_Pvariable(config[CONF_ID])
     cg.add(var.set_touch_debounce(config[CONF_TOUCH_DEBOUNCE]))
     cg.add(var.set_release_debounce(config[CONF_RELEASE_DEBOUNCE]))
     cg.add(var.set_touch_threshold(config[CONF_TOUCH_THRESHOLD]))
     cg.add(var.set_release_threshold(config[CONF_RELEASE_THRESHOLD]))
+    cg.add(var.set_max_touch_channel(config[CONF_MAX_TOUCH_CHANNEL]))
     await cg.register_component(var, config)
     await i2c.register_i2c_device(var, config)
+
+
+def validate_mode(value):
+    if bool(value[CONF_INPUT]) == bool(value[CONF_OUTPUT]):
+        raise cv.Invalid("Mode must be either input or output")
+    return value
+
+
+# https://www.nxp.com/docs/en/data-sheet/MPR121.pdf, page 4
+#
+# Among the 12 electrode inputs, 8 inputs are designed as multifunctional pins. When these pins are
+# not configured as electrodes, they may be used to drive LEDs or used for general purpose input or
+# output.
+MPR121_GPIO_PIN_SCHEMA = pins.gpio_base_schema(
+    MPR121GPIOPin,
+    cv.int_range(min=4, max=11),
+    modes=[CONF_INPUT, CONF_OUTPUT],
+    mode_validator=validate_mode,
+).extend(
+    {
+        cv.Required(CONF_MPR121): cv.use_id(MPR121Component),
+    }
+)
+
+
+def mpr121_pin_final_validate(pin_config, parent_config):
+    if pin_config[CONF_NUMBER] <= parent_config[CONF_MAX_TOUCH_CHANNEL]:
+        raise cv.Invalid(
+            "Pin number must be higher than the max touch channel of the MPR121 component",
+        )
+
+
+@pins.PIN_SCHEMA_REGISTRY.register(
+    CONF_MPR121, MPR121_GPIO_PIN_SCHEMA, mpr121_pin_final_validate
+)
+async def mpr121_gpio_pin_to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    parent = await cg.get_variable(config[CONF_MPR121])
+
+    cg.add(var.set_parent(parent))
+
+    num = config[CONF_NUMBER]
+    cg.add(var.set_pin(num))
+    cg.add(var.set_inverted(config[CONF_INVERTED]))
+    cg.add(var.set_flags(pins.gpio_flags_expr(config[CONF_MODE])))
+    return var

esphome/components/mpr121/binary_sensor/__init__.py

@@ -2,7 +2,7 @@ import esphome.codegen as cg
 import esphome.config_validation as cv
 from esphome.components import binary_sensor
 from esphome.const import CONF_CHANNEL
-from . import (
+from .. import (
     mpr121_ns,
     MPR121Component,
     CONF_MPR121_ID,
@@ -11,9 +11,9 @@ from . import (
 )
 
 DEPENDENCIES = ["mpr121"]
-MPR121Channel = mpr121_ns.class_("MPR121Channel", binary_sensor.BinarySensor)
+MPR121BinarySensor = mpr121_ns.class_("MPR121BinarySensor", binary_sensor.BinarySensor)
 
-CONFIG_SCHEMA = binary_sensor.binary_sensor_schema(MPR121Channel).extend(
+CONFIG_SCHEMA = binary_sensor.binary_sensor_schema(MPR121BinarySensor).extend(
     {
         cv.GenerateID(CONF_MPR121_ID): cv.use_id(MPR121Component),
         cv.Required(CONF_CHANNEL): cv.int_range(min=0, max=11),
@@ -27,6 +27,7 @@ async def to_code(config):
     var = await binary_sensor.new_binary_sensor(config)
     hub = await cg.get_variable(config[CONF_MPR121_ID])
     cg.add(var.set_channel(config[CONF_CHANNEL]))
+    cg.register_parented(var, hub)
 
     if CONF_TOUCH_THRESHOLD in config:
         cg.add(var.set_touch_threshold(config[CONF_TOUCH_THRESHOLD]))

esphome/components/mpr121/binary_sensor/mpr121_binary_sensor.cpp

@@ -0,0 +1,20 @@
+#include "mpr121_binary_sensor.h"
+
+namespace esphome {
+namespace mpr121 {
+
+void MPR121BinarySensor::setup() {
+  uint8_t touch_threshold = this->touch_threshold_.value_or(this->parent_->get_touch_threshold());
+  this->parent_->write_byte(MPR121_TOUCHTH_0 + 2 * this->channel_, touch_threshold);
+
+  uint8_t release_threshold = this->release_threshold_.value_or(this->parent_->get_release_threshold());
+  this->parent_->write_byte(MPR121_RELEASETH_0 + 2 * this->channel_, release_threshold);
+}
+
+void MPR121BinarySensor::process(uint16_t data) {
+  bool new_state = data & (1 << this->channel_);
+  this->publish_state(new_state);
+}
+
+}  // namespace mpr121
+}  // namespace esphome

esphome/components/mpr121/binary_sensor/mpr121_binary_sensor.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#include "esphome/components/binary_sensor/binary_sensor.h"
+
+#include "../mpr121.h"
+
+namespace esphome {
+namespace mpr121 {
+
+class MPR121BinarySensor : public binary_sensor::BinarySensor, public MPR121Channel, public Parented<MPR121Component> {
+ public:
+  void set_channel(uint8_t channel) { this->channel_ = channel; }
+  void set_touch_threshold(uint8_t touch_threshold) { this->touch_threshold_ = touch_threshold; };
+  void set_release_threshold(uint8_t release_threshold) { this->release_threshold_ = release_threshold; };
+
+  void setup() override;
+  void process(uint16_t data) override;
+
+ protected:
+  uint8_t channel_{0};
+  optional<uint8_t> touch_threshold_{};
+  optional<uint8_t> release_threshold_{};
+};
+
+}  // namespace mpr121
+}  // namespace esphome

esphome/components/mpr121/mpr121.cpp

@@ -1,6 +1,9 @@
 #include "mpr121.h"
-#include "esphome/core/log.h"
+
+#include <cstdint>
+
 #include "esphome/core/hal.h"
+#include "esphome/core/log.h"
 
 namespace esphome {
 namespace mpr121 {
@@ -20,10 +23,7 @@ void MPR121Component::setup() {
 
   // set touch sensitivity for all 12 channels
   for (auto *channel : this->channels_) {
-    this->write_byte(MPR121_TOUCHTH_0 + 2 * channel->channel_,
+    channel->setup();
-                     channel->touch_threshold_.value_or(this->touch_threshold_));
-    this->write_byte(MPR121_RELEASETH_0 + 2 * channel->channel_,
-                     channel->release_threshold_.value_or(this->release_threshold_));
   }
   this->write_byte(MPR121_MHDR, 0x01);
   this->write_byte(MPR121_NHDR, 0x01);
@@ -44,8 +44,15 @@ void MPR121Component::setup() {
   this->write_byte(MPR121_CONFIG1, 0x10);
   // 0.5uS encoding, 1ms period
   this->write_byte(MPR121_CONFIG2, 0x20);
-  // start with first 5 bits of baseline tracking
+
-  this->write_byte(MPR121_ECR, 0x8F);
+  // Write the Electrode Configuration Register
+  // * Highest 2 bits is "Calibration Lock", which we set to a value corresponding to 5 bits.
+  // * The 2 bits below is "Proximity Enable" and are left at 0.
+  // * The 4 least significant bits control how many electrodes are enabled. Electrodes are enabled
+  //   as a range, starting at 0 up to the highest channel index used.
+  this->write_byte(MPR121_ECR, 0x80 | (this->max_touch_channel_ + 1));
+
+  this->flush_gpio_();
 }
 
 void MPR121Component::set_touch_debounce(uint8_t debounce) {
@@ -86,6 +93,72 @@ void MPR121Component::loop() {
 
   for (auto *channel : this->channels_)
     channel->process(val);
+
+  this->read_byte(MPR121_GPIODATA, &this->gpio_input_);
+}
+
+bool MPR121Component::digital_read(uint8_t ionum) { return (this->gpio_input_ & (1 << ionum)) != 0; }
+
+void MPR121Component::digital_write(uint8_t ionum, bool value) {
+  if (value) {
+    this->gpio_output_ |= (1 << ionum);
+  } else {
+    this->gpio_output_ &= ~(1 << ionum);
+  }
+  this->flush_gpio_();
+}
+
+void MPR121Component::pin_mode(uint8_t ionum, gpio::Flags flags) {
+  this->gpio_enable_ |= (1 << ionum);
+  if (flags & gpio::FLAG_INPUT) {
+    this->gpio_direction_ &= ~(1 << ionum);
+  } else if (flags & gpio::FLAG_OUTPUT) {
+    this->gpio_direction_ |= 1 << ionum;
+  }
+  this->flush_gpio_();
+}
+
+bool MPR121Component::flush_gpio_() {
+  if (this->is_failed()) {
+    return false;
+  }
+
+  // TODO: The CTL registers can configure internal pullup/pulldown resistors.
+  this->write_byte(MPR121_GPIOCTL0, 0x00);
+  this->write_byte(MPR121_GPIOCTL1, 0x00);
+  this->write_byte(MPR121_GPIOEN, this->gpio_enable_);
+  this->write_byte(MPR121_GPIODIR, this->gpio_direction_);
+
+  if (!this->write_byte(MPR121_GPIODATA, this->gpio_output_)) {
+    this->status_set_warning();
+    return false;
+  }
+
+  this->status_clear_warning();
+  return true;
+}
+
+void MPR121GPIOPin::setup() { this->pin_mode(this->flags_); }
+
+void MPR121GPIOPin::pin_mode(gpio::Flags flags) {
+  assert(this->pin_ >= 4);
+  this->parent_->pin_mode(this->pin_ - 4, flags);
+}
+
+bool MPR121GPIOPin::digital_read() {
+  assert(this->pin_ >= 4);
+  return this->parent_->digital_read(this->pin_ - 4) != this->inverted_;
+}
+
+void MPR121GPIOPin::digital_write(bool value) {
+  assert(this->pin_ >= 4);
+  this->parent_->digital_write(this->pin_ - 4, value != this->inverted_);
+}
+
+std::string MPR121GPIOPin::dump_summary() const {
+  char buffer[32];
+  snprintf(buffer, sizeof(buffer), "ELE%u on MPR121", this->pin_);
+  return buffer;
 }
 
 }  // namespace mpr121

esphome/components/mpr121/mpr121.h

@@ -1,8 +1,10 @@
 #pragma once
 
 #include "esphome/core/component.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/hal.h"
+
 #include "esphome/components/i2c/i2c.h"
-#include "esphome/components/binary_sensor/binary_sensor.h"
 
 #include <vector>
 
@@ -39,6 +41,9 @@ enum {
   MPR121_UPLIMIT = 0x7D,
   MPR121_LOWLIMIT = 0x7E,
   MPR121_TARGETLIMIT = 0x7F,
+  MPR121_GPIOCTL0 = 0x73,
+  MPR121_GPIOCTL1 = 0x74,
+  MPR121_GPIODATA = 0x75,
   MPR121_GPIODIR = 0x76,
   MPR121_GPIOEN = 0x77,
   MPR121_GPIOSET = 0x78,
@@ -47,19 +52,10 @@ enum {
   MPR121_SOFTRESET = 0x80,
 };
 
-class MPR121Channel : public binary_sensor::BinarySensor {
+class MPR121Channel {
-  friend class MPR121Component;
-
  public:
-  void set_channel(uint8_t channel) { channel_ = channel; }
+  virtual void setup() = 0;
-  void process(uint16_t data) { this->publish_state(static_cast<bool>(data & (1 << this->channel_))); }
+  virtual void process(uint16_t data) = 0;
-  void set_touch_threshold(uint8_t touch_threshold) { this->touch_threshold_ = touch_threshold; };
-  void set_release_threshold(uint8_t release_threshold) { this->release_threshold_ = release_threshold; };
-
- protected:
-  uint8_t channel_{0};
-  optional<uint8_t> touch_threshold_{};
-  optional<uint8_t> release_threshold_{};
 };
 
 class MPR121Component : public Component, public i2c::I2CDevice {
@@ -69,23 +65,63 @@ class MPR121Component : public Component, public i2c::I2CDevice {
   void set_release_debounce(uint8_t debounce);
   void set_touch_threshold(uint8_t touch_threshold) { this->touch_threshold_ = touch_threshold; };
   void set_release_threshold(uint8_t release_threshold) { this->release_threshold_ = release_threshold; };
-  uint8_t get_touch_threshold() { return this->touch_threshold_; };
+  uint8_t get_touch_threshold() const { return this->touch_threshold_; };
-  uint8_t get_release_threshold() { return this->release_threshold_; };
+  uint8_t get_release_threshold() const { return this->release_threshold_; };
   void setup() override;
   void dump_config() override;
-  float get_setup_priority() const override { return setup_priority::DATA; }
+  float get_setup_priority() const override { return setup_priority::IO; }
   void loop() override;
 
+  void set_max_touch_channel(uint8_t max_touch_channel) { this->max_touch_channel_ = max_touch_channel; }
+
+  // GPIO helper functions.
+  bool digital_read(uint8_t ionum);
+  void digital_write(uint8_t ionum, bool value);
+  void pin_mode(uint8_t ionum, gpio::Flags flags);
+
  protected:
   std::vector<MPR121Channel *> channels_{};
   uint8_t debounce_{0};
   uint8_t touch_threshold_{};
   uint8_t release_threshold_{};
+  uint8_t max_touch_channel_{3};
   enum ErrorCode {
     NONE = 0,
     COMMUNICATION_FAILED,
     WRONG_CHIP_STATE,
   } error_code_{NONE};
+
+  bool flush_gpio_();
+
+  /// The enable mask - zero means high Z, 1 means GPIO usage
+  uint8_t gpio_enable_{0x00};
+  /// Mask for the pin mode - 1 means output, 0 means input
+  uint8_t gpio_direction_{0x00};
+  /// The mask to write as output state - 1 means HIGH, 0 means LOW
+  uint8_t gpio_output_{0x00};
+  /// The mask to read as input state - 1 means HIGH, 0 means LOW
+  uint8_t gpio_input_{0x00};
+};
+
+/// Helper class to expose a MPR121 pin as an internal input GPIO pin.
+class MPR121GPIOPin : public GPIOPin {
+ public:
+  void setup() override;
+  void pin_mode(gpio::Flags flags) override;
+  bool digital_read() override;
+  void digital_write(bool value) override;
+  std::string dump_summary() const override;
+
+  void set_parent(MPR121Component *parent) { this->parent_ = parent; }
+  void set_pin(uint8_t pin) { this->pin_ = pin; }
+  void set_inverted(bool inverted) { this->inverted_ = inverted; }
+  void set_flags(gpio::Flags flags) { this->flags_ = flags; }
+
+ protected:
+  MPR121Component *parent_;
+  uint8_t pin_;
+  bool inverted_;
+  gpio::Flags flags_;
 };
 
 }  // namespace mpr121

tests/components/mpr121/common.yaml

@@ -0,0 +1,41 @@
+i2c:
+  - id: i2c_mpr121
+    scl: ${i2c_scl}
+    sda: ${i2c_sda}
+
+mpr121:
+  id: mpr121_first
+  address: 0x5A
+
+binary_sensor:
+  - platform: mpr121
+    id: touchkey0
+    name: touchkey0
+    channel: 0
+  - platform: mpr121
+    id: bin1
+    name: touchkey1
+    channel: 1
+  - platform: mpr121
+    id: bin2
+    name: touchkey2
+    channel: 2
+  - platform: mpr121
+    id: bin3
+    name: touchkey3
+    channel: 6
+
+output:
+  - platform: gpio
+    id: gpio1
+    pin:
+      mpr121: mpr121_first
+      number: 7
+      mode: OUTPUT
+  - platform: gpio
+    id: gpio2
+    pin:
+      mpr121: mpr121_first
+      number: 11
+      mode: OUTPUT
+      inverted: true

tests/components/mpr121/test.esp32-c3-idf.yaml

@@ -1,26 +1,5 @@
-i2c:
+substitutions:
-  - id: i2c_mpr121
+  i2c_scl: GPIO5
-    scl: 5
+  i2c_sda: GPIO4
-    sda: 4
 
-mpr121:
+<<: !include common.yaml
-  id: mpr121_first
-  address: 0x5A
-
-binary_sensor:
-  - platform: mpr121
-    id: touchkey0
-    name: touchkey0
-    channel: 0
-  - platform: mpr121
-    id: bin1
-    name: touchkey1
-    channel: 1
-  - platform: mpr121
-    id: bin2
-    name: touchkey2
-    channel: 2
-  - platform: mpr121
-    id: bin3
-    name: touchkey3
-    channel: 3

tests/components/mpr121/test.esp32-c3.yaml

@@ -1,26 +1,5 @@
-i2c:
+substitutions:
-  - id: i2c_mpr121
+  i2c_scl: GPIO5
-    scl: 5
+  i2c_sda: GPIO4
-    sda: 4
 
-mpr121:
+<<: !include common.yaml
-  id: mpr121_first
-  address: 0x5A
-
-binary_sensor:
-  - platform: mpr121
-    id: touchkey0
-    name: touchkey0
-    channel: 0
-  - platform: mpr121
-    id: bin1
-    name: touchkey1
-    channel: 1
-  - platform: mpr121
-    id: bin2
-    name: touchkey2
-    channel: 2
-  - platform: mpr121
-    id: bin3
-    name: touchkey3
-    channel: 3

tests/components/mpr121/test.esp32-idf.yaml

@@ -1,26 +1,5 @@
-i2c:
+substitutions:
-  - id: i2c_mpr121
+  i2c_scl: GPIO16
-    scl: 16
+  i2c_sda: GPIO17
-    sda: 17
 
-mpr121:
+<<: !include common.yaml
-  id: mpr121_first
-  address: 0x5A
-
-binary_sensor:
-  - platform: mpr121
-    id: touchkey0
-    name: touchkey0
-    channel: 0
-  - platform: mpr121
-    id: bin1
-    name: touchkey1
-    channel: 1
-  - platform: mpr121
-    id: bin2
-    name: touchkey2
-    channel: 2
-  - platform: mpr121
-    id: bin3
-    name: touchkey3
-    channel: 3

tests/components/mpr121/test.esp32.yaml

@@ -1,26 +1,5 @@
-i2c:
+substitutions:
-  - id: i2c_mpr121
+  i2c_scl: GPIO16
-    scl: 16
+  i2c_sda: GPIO17
-    sda: 17
 
-mpr121:
+<<: !include common.yaml
-  id: mpr121_first
-  address: 0x5A
-
-binary_sensor:
-  - platform: mpr121
-    id: touchkey0
-    name: touchkey0
-    channel: 0
-  - platform: mpr121
-    id: bin1
-    name: touchkey1
-    channel: 1
-  - platform: mpr121
-    id: bin2
-    name: touchkey2
-    channel: 2
-  - platform: mpr121
-    id: bin3
-    name: touchkey3
-    channel: 3

tests/components/mpr121/test.esp8266.yaml

@@ -1,26 +1,5 @@
-i2c:
+substitutions:
-  - id: i2c_mpr121
+  i2c_scl: GPIO5
-    scl: 5
+  i2c_sda: GPIO4
-    sda: 4
 
-mpr121:
+<<: !include common.yaml
-  id: mpr121_first
-  address: 0x5A
-
-binary_sensor:
-  - platform: mpr121
-    id: touchkey0
-    name: touchkey0
-    channel: 0
-  - platform: mpr121
-    id: bin1
-    name: touchkey1
-    channel: 1
-  - platform: mpr121
-    id: bin2
-    name: touchkey2
-    channel: 2
-  - platform: mpr121
-    id: bin3
-    name: touchkey3
-    channel: 3

tests/components/mpr121/test.rp2040.yaml

@@ -1,26 +1,5 @@
-i2c:
+substitutions:
-  - id: i2c_mpr121
+  i2c_scl: GPIO5
-    scl: 5
+  i2c_sda: GPIO4
-    sda: 4
 
-mpr121:
+<<: !include common.yaml
-  id: mpr121_first
-  address: 0x5A
-
-binary_sensor:
-  - platform: mpr121
-    id: touchkey0
-    name: touchkey0
-    channel: 0
-  - platform: mpr121
-    id: bin1
-    name: touchkey1
-    channel: 1
-  - platform: mpr121
-    id: bin2
-    name: touchkey2
-    channel: 2
-  - platform: mpr121
-    id: bin3
-    name: touchkey3
-    channel: 3

tests/test3.1.yaml

@@ -344,10 +344,6 @@ apds9960:
   address: 0x20
   update_interval: 60s
 
-mpr121:
-  id: mpr121_first
-  address: 0x5A
-
 binary_sensor:
   - platform: apds9960
     direction: up
@@ -371,25 +367,6 @@ binary_sensor:
     direction: right
     name: APDS9960 Right
 
-  - platform: mpr121
-    id: touchkey0
-    channel: 0
-    name: touchkey0
-  - platform: mpr121
-    channel: 1
-    name: touchkey1
-    id: bin1
-  - platform: mpr121
-    channel: 2
-    name: touchkey2
-    id: bin2
-  - platform: mpr121
-    channel: 3
-    name: touchkey3
-    id: bin3
-    on_press:
-      then:
-        - switch.toggle: mpr121_toggle
   - platform: ttp229_lsf
     channel: 1
     name: TTP229 LSF Test
@@ -443,10 +420,6 @@ grove_tb6612fng:
   address: 0x14
 
 switch:
-  - platform: template
-    name: mpr121_toggle
-    id: mpr121_toggle
-    optimistic: true
   - platform: gpio
     id: gpio_switch1
     pin: