From 9e2ae391fc33bca88acdeb3a468912840936bb59 Mon Sep 17 00:00:00 2001
From: Theo Arends <11044339+arendst@users.noreply.github.com>
Date: Tue, 19 Dec 2023 15:38:12 +0100
Subject: [PATCH] Fix ESP32 piezo ceramic buzzer

Fix ESP32 piezo ceramic buzzer doesn't buzz (#20118)
---
 CHANGELOG.md                                   | 1 +
 RELEASENOTES.md                                | 1 +
 tasmota/tasmota_xdrv_driver/xdrv_24_buzzer.ino | 7 +++++++
 3 files changed, 9 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2609fcd7f484..4f1887cb2d1c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ All notable changes to this project will be documented in this file.
 ### Fixed
 - Matter Contact sensor was not triggering any update (#20232)
 - CVE-2021-36603 Cross Site Scripting (XSS) vulnerability (#12221)
+- ESP32 piezo ceramic buzzer doesn't buzz (#20118)
 
 ### Removed
 
diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 2d809a33aa54..8953e82645e5 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -130,6 +130,7 @@ The latter links can be used for OTA upgrades too like ``OtaUrl https://ota.tasm
 
 ### Fixed
 - CVE-2021-36603 Cross Site Scripting (XSS) vulnerability [#12221](https://github.com/arendst/Tasmota/issues/12221)
+- ESP32 piezo ceramic buzzer doesn't buzz [#20118](https://github.com/arendst/Tasmota/issues/20118)
 - Matter Contact sensor was not triggering any update [#20232](https://github.com/arendst/Tasmota/issues/20232)
 
 ### Removed
\ No newline at end of file
diff --git a/tasmota/tasmota_xdrv_driver/xdrv_24_buzzer.ino b/tasmota/tasmota_xdrv_driver/xdrv_24_buzzer.ino
index 81dcc1dc70ef..9a54076d5d28 100644
--- a/tasmota/tasmota_xdrv_driver/xdrv_24_buzzer.ino
+++ b/tasmota/tasmota_xdrv_driver/xdrv_24_buzzer.ino
@@ -52,7 +52,14 @@ void BuzzerSet(uint32_t state) {
     if (last_state != state) {
       // Set 50% duty cycle for frequency output
       // Set 0% (or 100% for inverted PWM) duty cycle which turns off frequency output either way
+#ifdef ESP8266
       analogWrite(Pin(GPIO_BUZZER), (state) ? Settings->pwm_range / 2 : 0);  // set duty cycle for frequency output
+#else
+      int32_t pin = Pin(GPIO_BUZZER);
+      if (analogAttach(pin, Buzzer.inverted) >= 0) {
+        analogWritePhase(pin, (state) ? Settings->pwm_range / 2 : 0, 0);
+      }
+#endif
       last_state = state;
     }
   } else {