diff --git a/esphome/components/ltr390/ltr390.cpp b/esphome/components/ltr390/ltr390.cpp
index 65c08ab614..4eb1ff2c46 100644
--- a/esphome/components/ltr390/ltr390.cpp
+++ b/esphome/components/ltr390/ltr390.cpp
@@ -8,6 +8,9 @@ namespace ltr390 {
 
 static const char *const TAG = "ltr390";
 
+static const uint8_t LTR390_WAKEUP_TIME = 10;
+static const uint8_t LTR390_SETTLE_TIME = 5;
+
 static const uint8_t LTR390_MAIN_CTRL = 0x00;
 static const uint8_t LTR390_MEAS_RATE = 0x04;
 static const uint8_t LTR390_GAIN = 0x05;
@@ -101,21 +104,27 @@ void LTR390Component::read_mode_(int mode_index) {
 
   std::bitset<8> ctrl = this->reg(LTR390_MAIN_CTRL).get();
   ctrl[LTR390_CTRL_MODE] = mode;
+  ctrl[LTR390_CTRL_EN] = true;
   this->reg(LTR390_MAIN_CTRL) = ctrl.to_ulong();
 
   // After the sensor integration time do the following
-  this->set_timeout(((uint32_t) RESOLUTIONVALUE[this->res_]) * 100, [this, mode_index]() {
-    // Read from the sensor
-    std::get<1>(this->mode_funcs_[mode_index])();
+  this->set_timeout(((uint32_t) RESOLUTIONVALUE[this->res_]) * 100 + LTR390_WAKEUP_TIME + LTR390_SETTLE_TIME,
+                    [this, mode_index]() {
+                      // Read from the sensor
+                      std::get<1>(this->mode_funcs_[mode_index])();
 
-    // If there are more modes to read then begin the next
-    // otherwise stop
-    if (mode_index + 1 < (int) this->mode_funcs_.size()) {
-      this->read_mode_(mode_index + 1);
-    } else {
-      this->reading_ = false;
-    }
-  });
+                      // If there are more modes to read then begin the next
+                      // otherwise stop
+                      if (mode_index + 1 < (int) this->mode_funcs_.size()) {
+                        this->read_mode_(mode_index + 1);
+                      } else {
+                        // put sensor in standby
+                        std::bitset<8> ctrl = this->reg(LTR390_MAIN_CTRL).get();
+                        ctrl[LTR390_CTRL_EN] = false;
+                        this->reg(LTR390_MAIN_CTRL) = ctrl.to_ulong();
+                        this->reading_ = false;
+                      }
+                    });
 }
 
 void LTR390Component::setup() {
diff --git a/esphome/components/voice_assistant/voice_assistant.h b/esphome/components/voice_assistant/voice_assistant.h
index d6b1502381..1c0ea12f4f 100644
--- a/esphome/components/voice_assistant/voice_assistant.h
+++ b/esphome/components/voice_assistant/voice_assistant.h
@@ -94,10 +94,10 @@ class VoiceAssistant : public Component {
   uint32_t get_feature_flags() const {
     uint32_t flags = 0;
     flags |= VoiceAssistantFeature::FEATURE_VOICE_ASSISTANT;
+    flags |= VoiceAssistantFeature::FEATURE_API_AUDIO;
 #ifdef USE_SPEAKER
     if (this->speaker_ != nullptr) {
       flags |= VoiceAssistantFeature::FEATURE_SPEAKER;
-      flags |= VoiceAssistantFeature::FEATURE_API_AUDIO;
     }
 #endif
     return flags;
diff --git a/esphome/const.py b/esphome/const.py
index 6e00c1bbe1..e3d9bfeb64 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -1,6 +1,6 @@
 """Constants used by esphome."""
 
-__version__ = "2024.5.0b3"
+__version__ = "2024.5.0b4"
 
 ALLOWED_NAME_CHARS = "abcdefghijklmnopqrstuvwxyz0123456789-_"
 VALID_SUBSTITUTIONS_CHARACTERS = (
diff --git a/esphome/core/config.py b/esphome/core/config.py
index 2d87796987..80b731b905 100644
--- a/esphome/core/config.py
+++ b/esphome/core/config.py
@@ -394,7 +394,7 @@ async def to_code(config):
     if project_conf := config.get(CONF_PROJECT):
         cg.add_define("ESPHOME_PROJECT_NAME", project_conf[CONF_NAME])
         cg.add_define("ESPHOME_PROJECT_VERSION", project_conf[CONF_VERSION])
-        cg.add_define("ESPHOME_PROJECT_VERSION_30", project_conf[CONF_VERSION][:30])
+        cg.add_define("ESPHOME_PROJECT_VERSION_30", project_conf[CONF_VERSION][:29])
         for conf in project_conf.get(CONF_ON_UPDATE, []):
             trigger = cg.new_Pvariable(conf[CONF_TRIGGER_ID])
             await cg.register_component(trigger, conf)
diff --git a/requirements.txt b/requirements.txt
index df94b8b77c..698ae56447 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ tornado==6.4
 tzlocal==5.2    # from time
 tzdata>=2021.1  # from time
 pyserial==3.5
-platformio==6.1.13  # When updating platformio, also update Dockerfile
+platformio==6.1.15  # When updating platformio, also update Dockerfile
 esptool==4.7.0
 click==8.1.7
 esphome-dashboard==20240412.0