diff --git a/esphome/components/mopeka_std_check/mopeka_std_check.cpp b/esphome/components/mopeka_std_check/mopeka_std_check.cpp
index 6322b550c9..88bd7b02fd 100644
--- a/esphome/components/mopeka_std_check/mopeka_std_check.cpp
+++ b/esphome/components/mopeka_std_check/mopeka_std_check.cpp
@@ -108,7 +108,7 @@ bool MopekaStdCheck::parse_device(const esp32_ble_tracker::ESPBTDevice &device)
   }
 
   // Get temperature of sensor
-  uint8_t temp_in_c = this->parse_temperature_(mopeka_data);
+  int8_t temp_in_c = this->parse_temperature_(mopeka_data);
   if (this->temperature_ != nullptr) {
     this->temperature_->publish_state(temp_in_c);
   }
@@ -223,12 +223,12 @@ uint8_t MopekaStdCheck::parse_battery_level_(const mopeka_std_package *message)
   return (uint8_t) percent;
 }
 
-uint8_t MopekaStdCheck::parse_temperature_(const mopeka_std_package *message) {
+int8_t MopekaStdCheck::parse_temperature_(const mopeka_std_package *message) {
   uint8_t tmp = message->raw_temp;
   if (tmp == 0x0) {
     return -40;
   } else {
-    return (uint8_t) ((tmp - 25.0f) * 1.776964f);
+    return static_cast<int8_t>((tmp - 25.0f) * 1.776964f);
   }
 }
 
diff --git a/esphome/components/mopeka_std_check/mopeka_std_check.h b/esphome/components/mopeka_std_check/mopeka_std_check.h
index 897b5414ed..45588988c5 100644
--- a/esphome/components/mopeka_std_check/mopeka_std_check.h
+++ b/esphome/components/mopeka_std_check/mopeka_std_check.h
@@ -71,7 +71,7 @@ class MopekaStdCheck : public Component, public esp32_ble_tracker::ESPBTDeviceLi
 
   float get_lpg_speed_of_sound_(float temperature);
   uint8_t parse_battery_level_(const mopeka_std_package *message);
-  uint8_t parse_temperature_(const mopeka_std_package *message);
+  int8_t parse_temperature_(const mopeka_std_package *message);
 };
 
 }  // namespace mopeka_std_check
diff --git a/esphome/components/pulse_counter/pulse_counter_sensor.cpp b/esphome/components/pulse_counter/pulse_counter_sensor.cpp
index 5e62c0a410..ec00bd024e 100644
--- a/esphome/components/pulse_counter/pulse_counter_sensor.cpp
+++ b/esphome/components/pulse_counter/pulse_counter_sensor.cpp
@@ -175,7 +175,8 @@ void PulseCounterSensor::setup() {
 
 void PulseCounterSensor::set_total_pulses(uint32_t pulses) {
   this->current_total_ = pulses;
-  this->total_sensor_->publish_state(pulses);
+  if (this->total_sensor_ != nullptr)
+    this->total_sensor_->publish_state(pulses);
 }
 
 void PulseCounterSensor::dump_config() {
diff --git a/esphome/components/ruuvi_ble/ruuvi_ble.cpp b/esphome/components/ruuvi_ble/ruuvi_ble.cpp
index 1b126bdef0..bf088873ce 100644
--- a/esphome/components/ruuvi_ble/ruuvi_ble.cpp
+++ b/esphome/components/ruuvi_ble/ruuvi_ble.cpp
@@ -63,10 +63,13 @@ bool parse_ruuvi_data_byte(const esp32_ble_tracker::adv_data_t &adv_data, RuuviP
       result.acceleration_x = data[6] == 0xFF && data[7] == 0xFF ? NAN : acceleration_x;
       result.acceleration_y = data[8] == 0xFF && data[9] == 0xFF ? NAN : acceleration_y;
       result.acceleration_z = data[10] == 0xFF && data[11] == 0xFF ? NAN : acceleration_z;
-      result.acceleration = result.acceleration_x == NAN || result.acceleration_y == NAN || result.acceleration_z == NAN
-                                ? NAN
-                                : sqrtf(acceleration_x * acceleration_x + acceleration_y * acceleration_y +
-                                        acceleration_z * acceleration_z);
+      if ((data[6] != 0xFF || data[7] != 0xFF) && (data[8] != 0xFF || data[9] != 0xFF) &&
+          (data[10] != 0xFF || data[11] != 0xFF)) {
+        result.acceleration =
+            sqrtf(acceleration_x * acceleration_x + acceleration_y * acceleration_y + acceleration_z * acceleration_z);
+      } else {
+        result.acceleration = NAN;
+      }
       result.battery_voltage = (power_info >> 5) == 0x7FF ? NAN : battery_voltage;
       result.tx_power = (power_info & 0x1F) == 0x1F ? NAN : tx_power;
       result.movement_counter = movement_counter;
diff --git a/esphome/components/scd4x/scd4x.cpp b/esphome/components/scd4x/scd4x.cpp
index a265386cc2..0c108fba9d 100644
--- a/esphome/components/scd4x/scd4x.cpp
+++ b/esphome/components/scd4x/scd4x.cpp
@@ -307,7 +307,7 @@ bool SCD4XComponent::start_measurement_() {
       break;
   }
 
-  static uint8_t remaining_retries = 3;
+  uint8_t remaining_retries = 3;
   while (remaining_retries) {
     if (!this->write_command(measurement_command)) {
       ESP_LOGE(TAG, "Error starting measurements");
@@ -316,6 +316,7 @@ bool SCD4XComponent::start_measurement_() {
       if (--remaining_retries == 0)
         return false;
       delay(50);  // NOLINT wait 50 ms and try again
+      continue;
     }
     this->status_clear_warning();
     return true;
diff --git a/esphome/components/usb_cdc_acm/usb_cdc_acm_esp32.cpp b/esphome/components/usb_cdc_acm/usb_cdc_acm_esp32.cpp
index d33fb80f78..44de986f9a 100644
--- a/esphome/components/usb_cdc_acm/usb_cdc_acm_esp32.cpp
+++ b/esphome/components/usb_cdc_acm/usb_cdc_acm_esp32.cpp
@@ -161,7 +161,7 @@ void USBCDCACMInstance::setup() {
 
   // Create a simple, unique task name per interface
   char task_name[] = "usb_tx_0";
-  task_name[sizeof(task_name) - 1] = format_hex_char(static_cast<char>(this->itf_));
+  task_name[sizeof(task_name) - 2] = format_hex_char(static_cast<char>(this->itf_));
   xTaskCreate(usb_tx_task_fn, task_name, stack_size, this, 4, &this->usb_tx_task_handle_);
 
   if (this->usb_tx_task_handle_ == nullptr) {