From 3df03e4be962687ddc6feeb1c8184534a0c526eb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Metrich?=
 <45318189+FredM67@users.noreply.github.com>
Date: Sun, 11 Oct 2026 14:31:07 +0200
Subject: [PATCH] [emontx] Read UART bytes with read_byte() (#20514)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
---
 esphome/components/emontx/emontx.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/esphome/components/emontx/emontx.cpp b/esphome/components/emontx/emontx.cpp
index ae92b737316..17497984c39 100644
--- a/esphome/components/emontx/emontx.cpp
+++ b/esphome/components/emontx/emontx.cpp
@@ -18,7 +18,9 @@ void EmonTx::setup() { this->buffer_pos_ = 0; }
 void EmonTx::loop() {
   // Read all available data to prevent UART buffer overflow
   while (this->available() > 0) {
-    uint8_t received = this->read();
+    uint8_t received;
+    if (!this->read_byte(&received))
+      break;
 
     if (received == '\r') {
       continue;  // Ignore CR