diff --git a/esphome/components/api/api_frame_helper.cpp b/esphome/components/api/api_frame_helper.cpp
index 26fbf1269f..520a5c2caf 100644
--- a/esphome/components/api/api_frame_helper.cpp
+++ b/esphome/components/api/api_frame_helper.cpp
@@ -707,7 +707,7 @@ APIError APIPlaintextFrameHelper::try_read_frame_(ParsedFrame *frame) {
     }
 
     size_t i = 1;
-    size_t consumed = 0;
+    uint32_t consumed = 0;
     auto msg_size_varint = ProtoVarInt::parse(&rx_header_buf_[i], rx_header_buf_.size() - i, &consumed);
     if (!msg_size_varint.has_value()) {
       // not enough data there yet
diff --git a/esphome/components/pn532/pn532.cpp b/esphome/components/pn532/pn532.cpp
index fc84f30078..fcab9872c4 100644
--- a/esphome/components/pn532/pn532.cpp
+++ b/esphome/components/pn532/pn532.cpp
@@ -49,7 +49,7 @@ void PN532::setup() {
   }
 
   // Set up SAM (secure access module)
-  uint8_t sam_timeout = std::min(255u, this->update_interval_ / 50);
+  uint8_t sam_timeout = std::min<uint8_t>(255u, this->update_interval_ / 50);
   if (!this->write_command_({
           PN532_COMMAND_SAMCONFIGURATION,
           0x01,         // normal mode
diff --git a/esphome/components/uart/uart_esp32.cpp b/esphome/components/uart/uart_esp32.cpp
index 16d683e4a6..c672a34c36 100644
--- a/esphome/components/uart/uart_esp32.cpp
+++ b/esphome/components/uart/uart_esp32.cpp
@@ -73,7 +73,11 @@ void UARTComponent::setup() {
   // Use Arduino HardwareSerial UARTs if all used pins match the ones
   // preconfigured by the platform. For example if RX disabled but TX pin
   // is 1 we still want to use Serial.
+#ifdef CONFIG_IDF_TARGET_ESP32C3
+  if (this->tx_pin_.value_or(21) == 21 && this->rx_pin_.value_or(20) == 20) {
+#else
   if (this->tx_pin_.value_or(1) == 1 && this->rx_pin_.value_or(3) == 3) {
+#endif
     this->hw_serial_ = &Serial;
   } else {
     this->hw_serial_ = new HardwareSerial(next_uart_num++);