From 6e4e6f16a6426067cbf05a147ecfba7cded0201a Mon Sep 17 00:00:00 2001
From: Kevin Le <vinhdat82@gmail.com>
Date: Fri, 14 Aug 2026 22:43:46 +0700
Subject: [PATCH] Prevented back-powering to save 2.8 mA for ST7735Display

---
 src/helpers/ui/ST7735Display.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/helpers/ui/ST7735Display.cpp b/src/helpers/ui/ST7735Display.cpp
index 344f5b1d..95588d17 100644
--- a/src/helpers/ui/ST7735Display.cpp
+++ b/src/helpers/ui/ST7735Display.cpp
@@ -528,6 +528,15 @@ void ST7735Display::turnOff() {
     //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
+    pinMode(PIN_TFT_CS, INPUT);
+    pinMode(PIN_TFT_DC, INPUT);
+    pinMode(PIN_TFT_SDA, INPUT);
+    pinMode(PIN_TFT_SCL, INPUT);
+    pinMode(PIN_TFT_RST, INPUT);
+    pinMode(PIN_TFT_LEDA_CTL, INPUT);
+
     _isOn = false;
 
     if (_peripher_power) _peripher_power->release();