From e1758d2ece3030c3df7aacab59844baaf1d0bb53 Mon Sep 17 00:00:00 2001
From: Kevin Le <vinhdat82@gmail.com>
Date: Sat, 15 Aug 2026 18:26:32 +0700
Subject: [PATCH] Fixed for T096 OLED to save 3.5mA and use dark theme

---
 src/helpers/ui/ST7735Display.cpp | 33 ++++++++++++++++++++------------
 1 file changed, 21 insertions(+), 12 deletions(-)

diff --git a/src/helpers/ui/ST7735Display.cpp b/src/helpers/ui/ST7735Display.cpp
index 95588d17..ac0a3f08 100644
--- a/src/helpers/ui/ST7735Display.cpp
+++ b/src/helpers/ui/ST7735Display.cpp
@@ -417,16 +417,16 @@ bool ST7735Display::i2c_probe(TwoWire& wire, uint8_t addr) {
   #define PIN_TFT_LEDA_CTL_ACTIVE  HIGH
 #endif
 
-// Color scheme
-ColorVal UIColor::window_bkg = ST77XX_WHITE;
-ColorVal UIColor::title_bkg = ST77XX_BLUE;
-ColorVal UIColor::title_txt = ST77XX_WHITE;
-ColorVal UIColor::primary_txt = ST77XX_BLACK;
-ColorVal UIColor::secondary_txt = (18 << 11) | (36 << 5) | 18;  // mid-gray
-ColorVal UIColor::warning_txt = ST77XX_ORANGE;
-ColorVal UIColor::popup_bkg = ST77XX_CYAN;
-ColorVal UIColor::popup_txt = ST77XX_BLACK;
-ColorVal UIColor::corp_blue = 0x001A;
+// Color scheme - Dark theme before v1.17
+ColorVal UIColor::window_bkg = ST77XX_BLACK;
+ColorVal UIColor::title_bkg = ST77XX_BLACK;
+ColorVal UIColor::title_txt = ST77XX_GREEN;
+ColorVal UIColor::primary_txt = ST77XX_GREEN;
+ColorVal UIColor::secondary_txt = ST77XX_YELLOW;
+ColorVal UIColor::warning_txt = ST77XX_RED;
+ColorVal UIColor::popup_bkg = ST77XX_BLACK;
+ColorVal UIColor::popup_txt = ST77XX_WHITE;
+ColorVal UIColor::corp_blue = ST77XX_BLUE;
 
 bool ST7735Display::begin() {
   if (!sprite) {
@@ -512,6 +512,15 @@ void ST7735Display::_resetAndInit() {
 void ST7735Display::turnOn() {
   if (!_isOn) {
     if (_peripher_power) _peripher_power->claim();
+
+    // Restore GPIOs
+    pinMode(PIN_TFT_CS, OUTPUT);
+    pinMode(PIN_TFT_DC, OUTPUT);
+    pinMode(PIN_TFT_SDA, OUTPUT);
+    pinMode(PIN_TFT_SCL, OUTPUT);
+    pinMode(PIN_TFT_RST, OUTPUT);
+    pinMode(PIN_TFT_LEDA_CTL, OUTPUT);
+
     _resetAndInit();
     sendCommand(ST77XX_DISPON);
 
@@ -525,11 +534,11 @@ void ST7735Display::turnOff() {
   if (_isOn) {
     sendCommand(ST77XX_DISPOFF);
 
-    //digitalWrite(PIN_TFT_RST, LOW);
+    // digitalWrite(PIN_TFT_RST, LOW);
     // Now turn off the backlight
     digitalWrite(PIN_TFT_LEDA_CTL, !PIN_TFT_LEDA_CTL_ACTIVE);
 
-    // Prevent back-powering to save 2.8 mA
+    // Prevent back-powering to save 3.5mA (from 12.6 down to 9.1mA)
     pinMode(PIN_TFT_CS, INPUT);
     pinMode(PIN_TFT_DC, INPUT);
     pinMode(PIN_TFT_SDA, INPUT);