From f897295db50093d868adee84e057edc548d77d84 Mon Sep 17 00:00:00 2001
From: Oliver Kleinecke <okleinecke@web.de>
Date: Sun, 9 Feb 2025 18:58:26 +0100
Subject: [PATCH] Update mcp4461.cpp

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

diff --git a/esphome/components/mcp4461/mcp4461.cpp b/esphome/components/mcp4461/mcp4461.cpp
index ee39a2db6f..23809f85c5 100644
--- a/esphome/components/mcp4461/mcp4461.cpp
+++ b/esphome/components/mcp4461/mcp4461.cpp
@@ -366,6 +366,10 @@ bool Mcp4461Component::increase_wiper_(Mcp4461WiperIdx wiper) {
     ESP_LOGW(TAG, "%s", LOG_STR_ARG(mcp4461_get_message_string(MCP4461_WIPER_LOCKED)));
     return false;
   }
+  if (this->reg_[wiper_idx].state == 256) {
+    ESP_LOGV(TAG, "%s", "Maximum wiper level reached, further increase of wiper %" PRIu8 " prohibited", wiper_idx);
+    return false;
+  }
   ESP_LOGV(TAG, "Increasing wiper %" PRIu8 "", wiper_idx);
   uint8_t reg = 0;
   uint8_t addr;
@@ -396,6 +400,10 @@ bool Mcp4461Component::decrease_wiper_(Mcp4461WiperIdx wiper) {
     ESP_LOGW(TAG, "%s", LOG_STR_ARG(mcp4461_get_message_string(MCP4461_WIPER_LOCKED)));
     return false;
   }
+  if (this->reg_[wiper_idx].state == 0) {
+    ESP_LOGV(TAG, "%s", "Minimum wiper level reached, further decrease of wiper %" PRIu8 " prohibited", wiper_idx);
+    return false;
+  }
   ESP_LOGV(TAG, "Decreasing wiper %" PRIu8 "", wiper_idx);
   uint8_t reg = 0;
   uint8_t addr;