From 556def78aaaec597f7bd737de77c7c89e46e08a3 Mon Sep 17 00:00:00 2001
From: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>
Date: Sun, 28 Jun 2026 14:18:30 -0400
Subject: [PATCH] [multiple] Single-precision float math, avoid double
 promotion (batch 3/4) (#17255)

---
 esphome/components/anova/anova_base.cpp              |  4 ++--
 esphome/components/bl0906/bl0906.cpp                 |  2 +-
 esphome/components/combination/combination.cpp       |  2 +-
 esphome/components/demo/demo_sensor.h                |  2 +-
 esphome/components/demo/demo_text_sensor.h           |  4 ++--
 esphome/components/es7243e/es7243e.cpp               |  8 ++++----
 esphome/components/haier/hon_climate.cpp             |  2 +-
 esphome/components/ina219/ina219.cpp                 |  2 +-
 esphome/components/light/light_color_values.h        |  4 ++--
 esphome/components/ltr501/ltr501.cpp                 | 12 ++++++------
 esphome/components/max17043/max17043.cpp             |  2 +-
 esphome/components/msa3xx/msa3xx.cpp                 |  2 +-
 esphome/components/openthread/openthread.h           |  2 +-
 esphome/components/spa06_base/spa06_base.cpp         |  2 +-
 esphome/components/tcs34725/tcs34725.cpp             |  4 ++--
 esphome/components/toshiba/toshiba.cpp               |  2 +-
 esphome/components/ufire_ise/ufire_ise.cpp           |  8 ++++----
 .../xiaomi_lywsd03mmc/xiaomi_lywsd03mmc.cpp          |  2 +-
 18 files changed, 33 insertions(+), 33 deletions(-)

diff --git a/esphome/components/anova/anova_base.cpp b/esphome/components/anova/anova_base.cpp
index 84dd4393eb..806a441dcd 100644
--- a/esphome/components/anova/anova_base.cpp
+++ b/esphome/components/anova/anova_base.cpp
@@ -6,9 +6,9 @@
 
 namespace esphome::anova {
 
-float ftoc(float f) { return (f - 32.0) * (5.0f / 9.0f); }
+float ftoc(float f) { return (f - 32.0f) * (5.0f / 9.0f); }
 
-float ctof(float c) { return (c * 9.0f / 5.0f) + 32.0; }
+float ctof(float c) { return (c * 9.0f / 5.0f) + 32.0f; }
 
 AnovaPacket *AnovaCodec::clean_packet_() {
   this->packet_.length = strlen((char *) this->packet_.data);
diff --git a/esphome/components/bl0906/bl0906.cpp b/esphome/components/bl0906/bl0906.cpp
index d387757051..9a27cffd04 100644
--- a/esphome/components/bl0906/bl0906.cpp
+++ b/esphome/components/bl0906/bl0906.cpp
@@ -205,7 +205,7 @@ void BL0906::read_data_(const uint8_t address, const float reference, sensor::Se
   // Chip temperature
   if (reference == BL0906_TREF) {
     value = (float) to_int32_t(data_s24);
-    value = (value - 64) * 12.5 / 59 - 40;
+    value = (value - 64) * 12.5f / 59 - 40;
   }
   sensor->publish_state(value);
 }
diff --git a/esphome/components/combination/combination.cpp b/esphome/components/combination/combination.cpp
index ddf1a105e0..8ef0976e3b 100644
--- a/esphome/components/combination/combination.cpp
+++ b/esphome/components/combination/combination.cpp
@@ -204,7 +204,7 @@ void MedianCombinationComponent::handle_new_value(float value) {
       median = sensor_states[sensor_states_size / 2];
     } else {
       // Even number of measurements, use the average of the two middle measurements
-      median = (sensor_states[sensor_states_size / 2] + sensor_states[sensor_states_size / 2 - 1]) / 2.0;
+      median = (sensor_states[sensor_states_size / 2] + sensor_states[sensor_states_size / 2 - 1]) / 2.0f;
     }
   }
 
diff --git a/esphome/components/demo/demo_sensor.h b/esphome/components/demo/demo_sensor.h
index 6153c810e1..ff2163776c 100644
--- a/esphome/components/demo/demo_sensor.h
+++ b/esphome/components/demo/demo_sensor.h
@@ -15,7 +15,7 @@ class DemoSensor final : public sensor::Sensor, public PollingComponent {
       float base = std::isnan(this->state) ? 0.0f : this->state;
       this->publish_state(base + val * 10);
     } else {
-      if (val < 0.1) {
+      if (val < 0.1f) {
         this->publish_state(NAN);
       } else {
         this->publish_state(val * 100);
diff --git a/esphome/components/demo/demo_text_sensor.h b/esphome/components/demo/demo_text_sensor.h
index fa728903d9..8eaa6c6b46 100644
--- a/esphome/components/demo/demo_text_sensor.h
+++ b/esphome/components/demo/demo_text_sensor.h
@@ -10,9 +10,9 @@ class DemoTextSensor final : public text_sensor::TextSensor, public PollingCompo
  public:
   void update() override {
     float val = random_float();
-    if (val < 0.33) {
+    if (val < 0.33f) {
       this->publish_state("foo");
-    } else if (val < 0.66) {
+    } else if (val < 0.66f) {
       this->publish_state("bar");
     } else {
       this->publish_state("foobar");
diff --git a/esphome/components/es7243e/es7243e.cpp b/esphome/components/es7243e/es7243e.cpp
index b4d9fba4c5..fc3cba7ae4 100644
--- a/esphome/components/es7243e/es7243e.cpp
+++ b/esphome/components/es7243e/es7243e.cpp
@@ -105,14 +105,14 @@ bool ES7243E::configure_mic_gain_() {
 
 uint8_t ES7243E::es7243e_gain_reg_value_(float mic_gain) {
   // reg: 12 - 34.5dB, 13 - 36dB, 14 - 37.5dB
-  mic_gain += 0.5;
-  if (mic_gain <= 33.0) {
+  mic_gain += 0.5f;
+  if (mic_gain <= 33.0f) {
     return (uint8_t) mic_gain / 3;
   }
-  if (mic_gain < 36.0) {
+  if (mic_gain < 36.0f) {
     return 12;
   }
-  if (mic_gain < 37.0) {
+  if (mic_gain < 37.0f) {
     return 13;
   }
   return 14;
diff --git a/esphome/components/haier/hon_climate.cpp b/esphome/components/haier/hon_climate.cpp
index 0ad9b00ce4..f68404afd9 100644
--- a/esphome/components/haier/hon_climate.cpp
+++ b/esphome/components/haier/hon_climate.cpp
@@ -607,7 +607,7 @@ haier_protocol::HaierMessage HonClimate::get_control_message() {
     if (climate_control.target_temperature.has_value()) {
       float target_temp = climate_control.target_temperature.value();
       out_data->set_point = ((int) target_temp) - 16;  // set the temperature with offset 16
-      out_data->half_degree = (target_temp - ((int) target_temp) >= 0.49) ? 1 : 0;
+      out_data->half_degree = (target_temp - ((int) target_temp) >= 0.49f) ? 1 : 0;
     }
     if (out_data->ac_power == 0) {
       // If AC is off - no presets allowed
diff --git a/esphome/components/ina219/ina219.cpp b/esphome/components/ina219/ina219.cpp
index 85da196584..833d1989c8 100644
--- a/esphome/components/ina219/ina219.cpp
+++ b/esphome/components/ina219/ina219.cpp
@@ -119,7 +119,7 @@ void INA219Component::setup() {
   }
 
   this->calibration_lsb_ = lsb;
-  auto calibration = uint32_t(0.04096f / (0.000001 * lsb * this->shunt_resistance_ohm_));
+  auto calibration = uint32_t(0.04096f / (0.000001f * lsb * this->shunt_resistance_ohm_));
   ESP_LOGV(TAG, "    Using LSB=%" PRIu32 " calibration=%" PRIu32, lsb, calibration);
   if (!this->write_byte_16(INA219_REGISTER_CALIBRATION, calibration)) {
     this->mark_failed();
diff --git a/esphome/components/light/light_color_values.h b/esphome/components/light/light_color_values.h
index 5cafa9fe82..e431a06df6 100644
--- a/esphome/components/light/light_color_values.h
+++ b/esphome/components/light/light_color_values.h
@@ -315,14 +315,14 @@ class LightColorValues {
     if (this->color_temperature_ <= 0) {
       return this->color_temperature_;
     }
-    return 1000000.0 / this->color_temperature_;
+    return 1000000.0f / this->color_temperature_;
   }
   /// Set the color temperature property of these light color values in kelvin.
   void set_color_temperature_kelvin(float color_temperature) {
     if (color_temperature <= 0) {
       return;
     }
-    this->color_temperature_ = 1000000.0 / color_temperature;
+    this->color_temperature_ = 1000000.0f / color_temperature;
   }
 
   /// Get the cold white property of these light color values. In range 0.0 to 1.0.
diff --git a/esphome/components/ltr501/ltr501.cpp b/esphome/components/ltr501/ltr501.cpp
index 9cba06e483..afdc271167 100644
--- a/esphome/components/ltr501/ltr501.cpp
+++ b/esphome/components/ltr501/ltr501.cpp
@@ -500,12 +500,12 @@ void LTRAlsPs501Component::apply_lux_calculation_(AlsReadings &data) {
   // method from
   // https://github.com/fards/Ainol_fire_kernel/blob/83832cf8a3082fd8e963230f4b1984479d1f1a84/customer/drivers/lightsensor/ltr501als.c#L295
 
-  if (ratio < 0.45) {
-    lux = 1.7743 * ch0 + 1.1059 * ch1;
-  } else if (ratio < 0.64) {
-    lux = 3.7725 * ch0 - 1.3363 * ch1;
-  } else if (ratio < 0.85) {
-    lux = 1.6903 * ch0 - 0.1693 * ch1;
+  if (ratio < 0.45f) {
+    lux = 1.7743f * ch0 + 1.1059f * ch1;
+  } else if (ratio < 0.64f) {
+    lux = 3.7725f * ch0 - 1.3363f * ch1;
+  } else if (ratio < 0.85f) {
+    lux = 1.6903f * ch0 - 0.1693f * ch1;
   } else {
     ESP_LOGW(TAG, "Impossible ch1/(ch0 + ch1) ratio");
     lux = 0.0f;
diff --git a/esphome/components/max17043/max17043.cpp b/esphome/components/max17043/max17043.cpp
index b59bac7ebf..8776bb5558 100644
--- a/esphome/components/max17043/max17043.cpp
+++ b/esphome/components/max17043/max17043.cpp
@@ -23,7 +23,7 @@ void MAX17043Component::update() {
     if (!this->read_byte_16(MAX17043_VCELL, &raw_voltage)) {
       this->status_set_warning(LOG_STR("Unable to read MAX17043_VCELL"));
     } else {
-      float voltage = (1.25 * (float) (raw_voltage >> 4)) / 1000.0;
+      float voltage = (1.25f * (float) (raw_voltage >> 4)) / 1000.0f;
       this->voltage_sensor_->publish_state(voltage);
       this->status_clear_warning();
     }
diff --git a/esphome/components/msa3xx/msa3xx.cpp b/esphome/components/msa3xx/msa3xx.cpp
index f23fcfc8ea..ecde0cb117 100644
--- a/esphome/components/msa3xx/msa3xx.cpp
+++ b/esphome/components/msa3xx/msa3xx.cpp
@@ -10,7 +10,7 @@ static const char *const TAG = "msa3xx";
 const uint8_t MSA_3XX_PART_ID = 0x13;
 
 const float GRAVITY_EARTH = 9.80665f;
-const float LSB_COEFF = 1000.0f / (GRAVITY_EARTH * 3.9);  // LSB to 1 LSB = 3.9mg = 0.0039g
+const float LSB_COEFF = 1000.0f / (GRAVITY_EARTH * 3.9f);  // LSB to 1 LSB = 3.9mg = 0.0039g
 const float G_OFFSET_MIN = -4.5f;  // -127...127 LSB = +- 0.4953g = +- 4.857 m/s^2 => +- 4.5 for the safe
 const float G_OFFSET_MAX = 4.5f;   // -127...127 LSB = +- 0.4953g = +- 4.857 m/s^2 => +- 4.5 for the safe
 
diff --git a/esphome/components/openthread/openthread.h b/esphome/components/openthread/openthread.h
index a96941325c..eb48d8a74a 100644
--- a/esphome/components/openthread/openthread.h
+++ b/esphome/components/openthread/openthread.h
@@ -85,7 +85,7 @@ class OpenThreadSrpComponent final : public Component {
  public:
   void set_mdns(esphome::mdns::MDNSComponent *mdns);
   // This has to run after the mdns component or else no services are available to advertise
-  float get_setup_priority() const override { return this->mdns_->get_setup_priority() - 1.0; }
+  float get_setup_priority() const override { return this->mdns_->get_setup_priority() - 1.0f; }
   void setup() override;
   static void srp_callback(otError err, const otSrpClientHostInfo *host_info, const otSrpClientService *services,
                            const otSrpClientService *removed_services, void *context);
diff --git a/esphome/components/spa06_base/spa06_base.cpp b/esphome/components/spa06_base/spa06_base.cpp
index b0490628cb..d3de5168e4 100644
--- a/esphome/components/spa06_base/spa06_base.cpp
+++ b/esphome/components/spa06_base/spa06_base.cpp
@@ -224,7 +224,7 @@ bool SPA06Component::soft_reset_() {
 }
 
 // Temperature conversion formula. See datasheet pg. 14
-float SPA06Component::convert_temperature_(const float &t_raw_sc) { return this->c0_ * 0.5 + this->c1_ * t_raw_sc; }
+float SPA06Component::convert_temperature_(const float &t_raw_sc) { return this->c0_ * 0.5f + this->c1_ * t_raw_sc; }
 // Pressure conversion formula. See datasheet pg. 14
 float SPA06Component::convert_pressure_(const float &p_raw_sc, const float &t_raw_sc) {
   float p2_raw_sc = p_raw_sc * p_raw_sc;
diff --git a/esphome/components/tcs34725/tcs34725.cpp b/esphome/components/tcs34725/tcs34725.cpp
index 40c65e9f84..b585392790 100644
--- a/esphome/components/tcs34725/tcs34725.cpp
+++ b/esphome/components/tcs34725/tcs34725.cpp
@@ -256,7 +256,7 @@ void TCS34725Component::update() {
     // increase only if not already maximum
     // do not use max gain, as ist will not get better
     if (this->gain_reg_ < 3) {
-      if (((float) raw_c / 655.35 < 20.f) && (this->integration_time_ > 600.f)) {
+      if (((float) raw_c / 655.35f < 20.f) && (this->integration_time_ > 600.f)) {
         gain_reg_val_new = this->gain_reg_ + 1;
         // update integration time to new situation
         integration_time_ideal = integration_time_ideal / 4;
@@ -265,7 +265,7 @@ void TCS34725Component::update() {
 
     // decrease gain, if very high clear values and integration times alreadey low
     if (this->gain_reg_ > 0) {
-      if (70 < ((float) raw_c / 655.35) && (this->integration_time_ < 200)) {
+      if (70 < ((float) raw_c / 655.35f) && (this->integration_time_ < 200)) {
         gain_reg_val_new = this->gain_reg_ - 1;
         // update integration time to new situation
         integration_time_ideal = integration_time_ideal * 4;
diff --git a/esphome/components/toshiba/toshiba.cpp b/esphome/components/toshiba/toshiba.cpp
index 1b37c6897d..19950bbd15 100644
--- a/esphome/components/toshiba/toshiba.cpp
+++ b/esphome/components/toshiba/toshiba.cpp
@@ -593,7 +593,7 @@ void ToshibaClimate::transmit_rac_pt1411hwru_() {
   message[3] = ~message[2];
   // Byte 4u: Temp
   if (this->model_ == MODEL_RAC_PT1411HWRU_F) {
-    temperature = (temperature * 1.8) + 32;
+    temperature = (temperature * 1.8f) + 32;
     temp_adjd = temperature - TOSHIBA_RAC_PT1411HWRU_TEMP_F_MIN;
   }
 
diff --git a/esphome/components/ufire_ise/ufire_ise.cpp b/esphome/components/ufire_ise/ufire_ise.cpp
index bd2dc2836e..d595b37a83 100644
--- a/esphome/components/ufire_ise/ufire_ise.cpp
+++ b/esphome/components/ufire_ise/ufire_ise.cpp
@@ -70,19 +70,19 @@ float UFireISEComponent::measure_ph_(float temperature) {
   if (mv == -1)
     return -1;
 
-  ph = fabs(7.0 - (mv / PROBE_MV_TO_PH));
+  ph = fabsf(7.0f - (mv / PROBE_MV_TO_PH));
 
   // Determine the temperature correction
   float distance_from_7 = std::abs(7 - roundf(ph));
   float distance_from_25 = std::floor(std::abs(25 - roundf(temperature)) / 10);
   float temp_multiplier = (distance_from_25 * distance_from_7) * PROBE_TMP_CORRECTION;
-  if ((ph >= 8.0) && (temperature >= 35))
+  if ((ph >= 8.0f) && (temperature >= 35))
     temp_multiplier *= -1;
-  if ((ph <= 6.0) && (temperature <= 15))
+  if ((ph <= 6.0f) && (temperature <= 15))
     temp_multiplier *= -1;
 
   ph += temp_multiplier;
-  if ((ph <= 0.0) || (ph > 14.0))
+  if ((ph <= 0.0f) || (ph > 14.0f))
     ph = -1;
   if (std::isinf(ph))
     ph = -1;
diff --git a/esphome/components/xiaomi_lywsd03mmc/xiaomi_lywsd03mmc.cpp b/esphome/components/xiaomi_lywsd03mmc/xiaomi_lywsd03mmc.cpp
index a0a9260156..7aa4809e24 100644
--- a/esphome/components/xiaomi_lywsd03mmc/xiaomi_lywsd03mmc.cpp
+++ b/esphome/components/xiaomi_lywsd03mmc/xiaomi_lywsd03mmc.cpp
@@ -49,7 +49,7 @@ bool XiaomiLYWSD03MMC::parse_device(const esp32_ble_tracker::ESPBTDevice &device
     }
     if (res->humidity.has_value() && this->humidity_ != nullptr) {
       // see https://github.com/custom-components/sensor.mitemp_bt/issues/7#issuecomment-595948254
-      *res->humidity = trunc(*res->humidity);
+      *res->humidity = truncf(*res->humidity);
     }
     if (!(xiaomi_ble::report_xiaomi_results(res, addr_str))) {
       continue;