From c536812dc20f6b3f38d213f3d838aed156dfa28d Mon Sep 17 00:00:00 2001
From: Oliver Kleinecke <okleinecke@web.de>
Date: Wed, 5 Feb 2025 18:26:07 +0100
Subject: [PATCH] Update mcp4461.cpp

---
 esphome/components/mcp4461/mcp4461.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/esphome/components/mcp4461/mcp4461.cpp b/esphome/components/mcp4461/mcp4461.cpp
index 7e33beb32e..98b5c64314 100644
--- a/esphome/components/mcp4461/mcp4461.cpp
+++ b/esphome/components/mcp4461/mcp4461.cpp
@@ -127,12 +127,14 @@ uint8_t Mcp4461Component::get_status_register() {
     return 0;
   }
   uint8_t msb = buf >> 8;
-  if (msb != 1) {
-    // D8 bit is hardlocked to 1 -> a status msb of 0 indicates device/communication issues, therefore mark component failed
+  uint8_t lsb;
+  lsb = static_cast<uint8_t>(buf & 0x00ff);
+  if (msb != 1 || ((lsb >> 7) & 0x01)) != 1 || ((lsb >> 1) & 0x01) != 1) {
+    // D8, D7 and R1 bits are hardlocked to 1 -> a status msb bit 0 (bit 9 of status register) of 0 or lsb bit 1/7 = 0 indicate device/communication issues, therefore mark component failed
     this->mark_failed();
     return 0;
   }
-  return static_cast<uint8_t>(buf & 0x00ff);
+  return ;
 }
 
 bool Mcp4461Component::is_writing_() { return static_cast<bool>((this->get_status_register() >> 4) & 0x01); }