From f065d74293a5717a3638bbbf830daa0af35c17f5 Mon Sep 17 00:00:00 2001
From: Theo Arends <11044339+arendst@users.noreply.github.com>
Date: Fri, 12 Jan 2024 13:57:31 +0100
Subject: [PATCH] Add support for HardwareSerial invert (#15461)

---
 CHANGELOG.md                                          | 1 +
 RELEASENOTES.md                                       | 1 +
 lib/default/TasmotaSerial-3.6.0/src/TasmotaSerial.cpp | 7 ++++---
 lib/default/TasmotaSerial-3.6.0/src/TasmotaSerial.h   | 3 ++-
 4 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f455a6d5a..90c881e1d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ All notable changes to this project will be documented in this file.
 ### Added
 - Berry `debug.caller` (#20470)
 - GPIO Viewer user selection of assets website now defaults to `https://ota.tasmota.com/tasmota|tasmota32/gpio_viewer/assets`
+- Support for HardwareSerial invert (#15461)
 
 ### Breaking Changed
 
diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 4ad43ade1..965134b73 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -126,6 +126,7 @@ The latter links can be used for OTA upgrades too like ``OtaUrl https://ota.tasm
 - NeoPool hydrolysis FL1 and Redox flag [#20258](https://github.com/arendst/Tasmota/issues/20258)
 - Support negative power on BL0942 using index 5..8 [#20322](https://github.com/arendst/Tasmota/issues/20322)
 - Support for pipsolar inverter [#20408](https://github.com/arendst/Tasmota/issues/20408)
+- Support for HardwareSerial invert [#15461](https://github.com/arendst/Tasmota/issues/15461)
 - ESP32 used UART information
 - ESP32 experimental support GPIOViewer when ``define USE_ESP32_GPIO_VIEWER`` is enabled
 - Berry GPIO viewer initial version using async webserver [#20416](https://github.com/arendst/Tasmota/issues/20416)
diff --git a/lib/default/TasmotaSerial-3.6.0/src/TasmotaSerial.cpp b/lib/default/TasmotaSerial-3.6.0/src/TasmotaSerial.cpp
index 9bdfb9733..3dd33b95e 100644
--- a/lib/default/TasmotaSerial-3.6.0/src/TasmotaSerial.cpp
+++ b/lib/default/TasmotaSerial-3.6.0/src/TasmotaSerial.cpp
@@ -46,11 +46,12 @@ static uint32_t tasmota_serial_uart_bitmap = 0;      // Assigned UARTs
 
 #endif  // ESP32
 
-TasmotaSerial::TasmotaSerial(int receive_pin, int transmit_pin, int hardware_fallback, int nwmode, int buffer_size) {
+TasmotaSerial::TasmotaSerial(int receive_pin, int transmit_pin, int hardware_fallback, int nwmode, int buffer_size, bool invert) {
   m_valid = false;
   m_hardserial = false;
   m_hardswap = false;
   m_overflow = false;
+  m_invert = invert;
   m_data_bits = 8;
   m_stop_bits = 1;
   m_nwmode = nwmode;
@@ -155,7 +156,7 @@ bool TasmotaSerial::freeUart(void) {
 }
 
 void TasmotaSerial::Esp32Begin(void) {
-  TSerial->begin(m_speed, m_config, m_rx_pin, m_tx_pin);
+  TSerial->begin(m_speed, m_config, m_rx_pin, m_tx_pin, m_invert);
   // For low bit rate, below 9600, set the Full RX threshold at 10 bytes instead of the default 120
   if (m_speed <= 9600) {
     // At 9600, 10 chars are ~10ms
@@ -219,7 +220,7 @@ bool TasmotaSerial::begin(uint32_t speed, uint32_t config) {
     }
 #ifdef ESP8266
     Serial.flush();
-    Serial.begin(speed, (SerialConfig)config);
+    Serial.begin(speed, (SerialConfig)config, SERIAL_FULL, m_tx_pin, m_invert);
     if (m_hardswap) {
       Serial.swap();
     }
diff --git a/lib/default/TasmotaSerial-3.6.0/src/TasmotaSerial.h b/lib/default/TasmotaSerial-3.6.0/src/TasmotaSerial.h
index 2f9be0963..66caa4102 100644
--- a/lib/default/TasmotaSerial-3.6.0/src/TasmotaSerial.h
+++ b/lib/default/TasmotaSerial-3.6.0/src/TasmotaSerial.h
@@ -37,7 +37,7 @@
 
 class TasmotaSerial : public Stream {
   public:
-    TasmotaSerial(int receive_pin, int transmit_pin, int hardware_fallback = 0, int nwmode = 0, int buffer_size = TM_SERIAL_BUFFER_SIZE);
+    TasmotaSerial(int receive_pin, int transmit_pin, int hardware_fallback = 0, int nwmode = 0, int buffer_size = TM_SERIAL_BUFFER_SIZE, bool invert = false);
     virtual ~TasmotaSerial();
     void setTransmitEnablePin(int tx_enable_pin);
 
@@ -102,6 +102,7 @@ class TasmotaSerial : public Stream {
     bool m_overflow;
     bool m_high_speed = false;
     bool m_very_high_speed = false;   // above 100000 bauds
+    bool m_invert;
     uint8_t *m_buffer = nullptr;
 #ifdef ESP32
     uint32_t m_speed;