Fix PN532 on ESP32 Serial flush both Tx and Rx buffers (#10910)

Fix PN532 on ESP32 Serial flush both Tx and Rx buffers (#10910)

CHANGELOG.md

@@ -4,6 +4,19 @@ All notable changes to this project will be documented in this file.
 ## [Unreleased] - Development
 
 ## [9.3.1.1]
+### Added
+- Allow MCP230xx pinmode from output to input (#11104)
+- SML VBUS support (#11125)
+
+### Changed
+- TuyaMcu dimmer timeout (#11121)
+
+### Fixed
+- Refactor acceleration function for shutter stepper and servo (#11088)
+- LM75AD detection on different addresses (#11096)
+- Timer loop when console is scrolled up regression from v9.3.0 (#11108)
+- Display exception when no file system is present (#11125)
+- PN532 on ESP32 Serial flush both Tx and Rx buffers (#10910)
 
 ## [Released]
 

RELEASENOTES.md

@@ -79,3 +79,16 @@ The attached binaries can also be downloaded from http://ota.tasmota.com/tasmota
 [Complete list](BUILDS.md) of available feature and sensors.
 
 ## Changelog v9.3.1.1
+### Added
+- Allow MCP230xx pinmode from output to input [#11104](https://github.com/arendst/Tasmota/issues/11104)
+- SML VBUS support [#11125](https://github.com/arendst/Tasmota/issues/11125)
+
+### Changed
+- TuyaMcu dimmer timeout [#11121](https://github.com/arendst/Tasmota/issues/11121)
+
+### Fixed
+- Refactor acceleration function for shutter stepper and servo [#11088](https://github.com/arendst/Tasmota/issues/11088)
+- LM75AD detection on different addresses [#11096](https://github.com/arendst/Tasmota/issues/11096)
+- Timer loop when console is scrolled up regression from v9.3.0 [#11108](https://github.com/arendst/Tasmota/issues/11108)
+- Display exception when no file system is present [#11125](https://github.com/arendst/Tasmota/issues/11125)
+- PN532 on ESP32 Serial flush both Tx and Rx buffers [#10910](https://github.com/arendst/Tasmota/issues/10910)

lib/default/TasmotaSerial-3.2.0/src/TasmotaSerial.cpp

@@ -173,7 +173,8 @@ void TasmotaSerial::flush(void) {
     Serial.flush();
 #endif  // ESP8266
 #ifdef ESP32
-    TSerial->flush();
+    TSerial->flush();  // Flushes Tx only https://github.com/espressif/arduino-esp32/pull/4263
+    while (TSerial->available()) { TSerial->read(); }
 #endif  // ESP32
   } else {
     m_in_pos = m_out_pos = 0;