From 980720b5a0f19d71102f6f8cd0888e734245e86c Mon Sep 17 00:00:00 2001
From: Stephan Hadinger <stephan.hadinger@gmail.com>
Date: Mon, 14 Jun 2021 19:36:21 +0200
Subject: [PATCH] Esp32c3 fix wrong baudrate

---
 tasmota/support.ino | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/tasmota/support.ino b/tasmota/support.ino
index 21037bea6..dd85c9f07 100644
--- a/tasmota/support.ino
+++ b/tasmota/support.ino
@@ -984,10 +984,19 @@ String GetSerialConfig(void) {
   return String(config);
 }
 
+#if defined(ESP32) && CONFIG_IDF_TARGET_ESP32C3
+// temporary workaround, see https://github.com/espressif/arduino-esp32/issues/5287
+#include <driver/uart.h>
+uint32_t GetSerialBaudrate(void) {
+  uint32_t br;
+  uart_get_baudrate(0, &br);
+  return (br / 300) * 300;  // Fix ESP32 strange results like 115201
+}
+#else
 uint32_t GetSerialBaudrate(void) {
-  // Serial.printf(">> GetSerialBaudrate baudrate = %d\n", Serial.baudRate());
   return (Serial.baudRate() / 300) * 300;  // Fix ESP32 strange results like 115201
 }
+#endif
 
 void SetSerialBegin(void) {
   TasmotaGlobal.baudrate = Settings->baudrate * 300;
@@ -1019,9 +1028,7 @@ void SetSerialBaudrate(uint32_t baudrate) {
   TasmotaGlobal.baudrate = baudrate;
   Settings->baudrate = TasmotaGlobal.baudrate / 300;
   if (GetSerialBaudrate() != TasmotaGlobal.baudrate) {
-#if defined(CONFIG_IDF_TARGET_ESP32C3) && !CONFIG_IDF_TARGET_ESP32C3    // crashes on ESP32C3 - TODO
     SetSerialBegin();
-#endif
   }
 }