add LED support for pimoroni

esphome/components/bh1745/bh1745.cpp

@@ -57,6 +57,13 @@ void BH1745Component::setup() {
   sys_ctrl.int_reset = false;
   this->reg((uint8_t) Bh1745Registers::SYSTEM_CONTROL) = sys_ctrl.raw;
 
+  // only for pimoroni boards for now - there are LEDs connected to interrupt pin
+  uint16_t TH_HIGH[1] = {0xFFFF};
+  uint16_t TH_LOW[1] = {0x0000};
+  this->write_bytes_16((uint8_t) Bh1745Registers::TH_LSB, TH_LOW, 1);
+  this->write_bytes_16((uint8_t) Bh1745Registers::TL_LSB, TH_HIGH, 1);
+  this->reg((uint8_t) Bh1745Registers::INTERRUPT_) = 0x00;
+
   this->set_timeout(BH1745_RESET_TIMEOUT_MS, [this]() {
     this->configure_measurement_time_();
     this->state_ = State::DELAYED_SETUP;
@@ -146,6 +153,18 @@ void BH1745Component::loop() {
 
 float BH1745Component::get_setup_priority() const { return setup_priority::DATA; }
 
+void BH1745Component::switch_led(bool on_off) {
+  // shall we require somehow that its a pimoroni board?
+  uint8_t raw = this->reg((uint8_t) Bh1745Registers::INTERRUPT_).get();
+
+  if (on_off) {
+    raw |= (1);
+  } else {
+    raw &= ~(1);
+  }
+  this->reg((uint8_t) Bh1745Registers::INTERRUPT_) = raw;
+}
+
 void BH1745Component::configure_measurement_time_() {
   ModeControl1Register mode_ctrl1;
   mode_ctrl1.reserved_3_7 = 0;

esphome/components/bh1745/bh1745.h

@@ -102,6 +102,9 @@ class BH1745Component : public PollingComponent, public i2c::I2CDevice {
     color_temperature_sensor_ = color_temperature_sensor;
   }
 
+  // only for Pimoroni board
+  void switch_led(bool on_off);
+
  protected:
   MeasurementTime measurement_time_{MeasurementTime::TIME_160MS};
   AdcGain adc_gain_{AdcGain::GAIN_1X};

esphome/components/bh1745/sensor.py

@@ -19,6 +19,8 @@ from esphome.const import (
 CODEOWNERS = ["@latonita"]
 DEPENDENCIES = ["i2c"]
 
+CONF_BH1745_ID = "bh1745_id"
+
 UNIT_COUNTS = "#"
 
 CONF_RED_CHANNEL = "red_channel"

esphome/components/bh1745/switch/__init__.py

@@ -0,0 +1,20 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import switch
+from ..sensor import bh1745_ns, BH1745SComponent, CONF_BH1745_ID
+
+BH1745SwitchLed = bh1745_ns.class_("BH1745SwitchLed", switch.Switch, cg.Component)
+
+CONFIG_SCHEMA = switch.SWITCH_SCHEMA.extend(
+    {
+        cv.GenerateID(): cv.declare_id(BH1745SwitchLed),
+        cv.GenerateID(CONF_BH1745_ID): cv.use_id(BH1745SComponent),
+    }
+).extend(cv.COMPONENT_SCHEMA)
+
+
+async def to_code(config):
+    var = await switch.new_switch(config)
+    await cg.register_component(var, config)
+    hub = await cg.get_variable(config[CONF_BH1745_ID])
+    cg.add(var.set_bh1745(hub))

esphome/components/bh1745/switch/bh1745_switch_led.cpp

@@ -0,0 +1,17 @@
+#include "bh1745_switch_led.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace bh1745 {
+
+static const char *const TAG = "bh1745.led";
+
+void BH1745SwitchLed::write_state(bool state) {
+  bh1745_->switch_led(state);
+  publish_state(state);
+}
+
+void BH1745SwitchLed::dump_config() { LOG_SWITCH("", "BH1745 Pimoroni LED", this); }
+
+}  // namespace bh1745
+}  // namespace esphome

esphome/components/bh1745/switch/bh1745_switch_led.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/switch/switch.h"
+#include "../bh1745.h"
+
+namespace esphome {
+namespace bh1745 {
+
+class BH1745SwitchLed : public switch_::Switch, public Component {
+ public:
+  void dump_config() override;
+
+  void set_bh1745(BH1745Component *bh1745) { bh1745_ = bh1745; }
+
+ protected:
+  void write_state(bool state) override;
+  BH1745Component *bh1745_;
+};
+}  // namespace bh1745
+}  // namespace esphome