From 61032f181c8f873e441d70e807ada5b4f7df45e9 Mon Sep 17 00:00:00 2001
From: vickash <vickashmahabir@gmail.com>
Date: Sun, 25 Aug 2024 01:26:52 -0400
Subject: [PATCH] Call #stop on ultrasonic echo pin before use to avoid lgpio
 alerts

---
 lib/denko/sensor/hcsr04.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/denko/sensor/hcsr04.rb b/lib/denko/sensor/hcsr04.rb
index 56a5cd4..82c7558 100644
--- a/lib/denko/sensor/hcsr04.rb
+++ b/lib/denko/sensor/hcsr04.rb
@@ -15,6 +15,9 @@ def initialize_pins(options={})
       def after_initialize(options={})
         super(options)
 
+        # Avoid generating extraneous alerts when used with Denko::PiBoard.
+        echo.stop
+
         # Receive values from echo pin.
         echo.add_callback { |data| self.update(data) }
       end