diff --git a/esphome/components/bl0906/bl0906.cpp b/esphome/components/bl0906/bl0906.cpp
index e48715010c..c1cd48a1ac 100644
--- a/esphome/components/bl0906/bl0906.cpp
+++ b/esphome/components/bl0906/bl0906.cpp
@@ -97,10 +97,10 @@ void BL0906::handle_actions_() {
     return;
   }
   ActionCallbackFuncPtr ptr_func = nullptr;
-  for (int i = 0; i < this->action_queue_.size(); i++) {
+  for (size_t i = 0; i < this->action_queue_.size(); i++) {
     ptr_func = this->action_queue_[i];
     if (ptr_func) {
-      ESP_LOGI(TAG, "HandleActionCallback[%d]", i);
+      ESP_LOGI(TAG, "HandleActionCallback[%zu]", i);
       (this->*ptr_func)();
     }
   }
diff --git a/esphome/components/bl0942/bl0942.cpp b/esphome/components/bl0942/bl0942.cpp
index 894fcbfbb7..95dd689b07 100644
--- a/esphome/components/bl0942/bl0942.cpp
+++ b/esphome/components/bl0942/bl0942.cpp
@@ -51,7 +51,7 @@ void BL0942::loop() {
   if (!avail) {
     return;
   }
-  if (avail < sizeof(buffer)) {
+  if (static_cast<size_t>(avail) < sizeof(buffer)) {
     if (!this->rx_start_) {
       this->rx_start_ = millis();
     } else if (millis() > this->rx_start_ + PKT_TIMEOUT_MS) {
@@ -148,7 +148,7 @@ void BL0942::setup() {
 
   this->write_reg_(BL0942_REG_USR_WRPROT, 0);
 
-  if (this->read_reg_(BL0942_REG_MODE) != mode)
+  if (static_cast<uint32_t>(this->read_reg_(BL0942_REG_MODE)) != mode)
     this->status_set_warning(LOG_STR("BL0942 setup failed!"));
 
   this->flush();