From a198df34eec6f6988faa259533c5e3734979ec55 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Mon, 9 Feb 2026 09:39:49 -0600
Subject: [PATCH] Remove unnecessary early guard

---
 esphome/components/rd03d/rd03d.cpp | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/esphome/components/rd03d/rd03d.cpp b/esphome/components/rd03d/rd03d.cpp
index 90ac87f93f..e4dbdf41cb 100644
--- a/esphome/components/rd03d/rd03d.cpp
+++ b/esphome/components/rd03d/rd03d.cpp
@@ -81,12 +81,8 @@ void RD03DComponent::dump_config() {
 }
 
 void RD03DComponent::loop() {
-  // Early return avoids stack adjustment for the batch buffer below.
-  // loop() runs ~7000/min so most calls have nothing to read.
+  // Read all available bytes in batches to reduce UART call overhead.
   int avail = this->available();
-  if (avail <= 0)
-    return;
-
   uint8_t buf[64];
   while (avail > 0) {
     size_t to_read = std::min(static_cast<size_t>(avail), sizeof(buf));