From c58822689889675e8d17bd008bf387a56c820180 Mon Sep 17 00:00:00 2001
From: YXZhu <zhuab1997@outlook.com>
Date: Thu, 15 Jan 2026 10:57:37 +0800
Subject: [PATCH] Swap the RES and DC pins to solve the problem of no display
 on some ESP32 development boards. It's quite strange.

---
 .../EpaperModuleTest_Arduino_ESP32.ino                      | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Example/EpaperModuleTest_Arduino_ESP32/EpaperModuleTest_Arduino_ESP32.ino b/Example/EpaperModuleTest_Arduino_ESP32/EpaperModuleTest_Arduino_ESP32.ino
index 97bacbe..7188265 100644
--- a/Example/EpaperModuleTest_Arduino_ESP32/EpaperModuleTest_Arduino_ESP32.ino
+++ b/Example/EpaperModuleTest_Arduino_ESP32/EpaperModuleTest_Arduino_ESP32.ino
@@ -10,8 +10,8 @@
 // ESP32 CS(SS)=5,SCL(SCK)=18,SDA(MOSI)=23,BUSY=4,RES(RST)=17,DC=16
 #define CS_PIN (5)
 #define BUSY_PIN (4)
-#define RES_PIN (17)
-#define DC_PIN (16)
+#define RES_PIN (16)
+#define DC_PIN (17)
 
 // 1.54'' EPD Module
 //GxEPD2_BW<GxEPD2_154_D67, GxEPD2_154_D67::HEIGHT> display(GxEPD2_154_D67(/*CS=5*/ CS_PIN, /*DC=*/ DC_PIN, /*RES=*/ RES_PIN, /*BUSY=*/ BUSY_PIN)); // GDEH0154D67 200x200, SSD1681
@@ -25,7 +25,7 @@
 //GxEPD2_3C<GxEPD2_290_C90c, GxEPD2_290_C90c::HEIGHT> display(GxEPD2_290_C90c(/*CS=5*/ CS_PIN, /*DC=*/ DC_PIN, /*RES=*/ RES_PIN, /*BUSY=*/ BUSY_PIN)); // GDEM029C90 128x296, SSD1680
 
 // 3.7'' EPD Module
-GxEPD2_BW<GxEPD2_370_GDEY037T03, GxEPD2_370_GDEY037T03::HEIGHT> display(GxEPD2_370_GDEY037T03(/*CS=5*/ CS_PIN, /*DC=*/ DC_PIN, /*RES=*/ RES_PIN, /*BUSY=*/ BUSY_PIN)); // GDEY037T03 240x416, UC8253
+//GxEPD2_BW<GxEPD2_370_GDEY037T03, GxEPD2_370_GDEY037T03::HEIGHT> display(GxEPD2_370_GDEY037T03(/*CS=5*/ CS_PIN, /*DC=*/ DC_PIN, /*RES=*/ RES_PIN, /*BUSY=*/ BUSY_PIN)); // GDEY037T03 240x416, UC8253
 
 // 4.2'' EPD Module
 //GxEPD2_BW<GxEPD2_420_GDEY042T81, GxEPD2_420_GDEY042T81::HEIGHT> display(GxEPD2_420_GDEY042T81(/*CS=5*/ CS_PIN, /*DC=*/ DC_PIN, /*RES=*/ RES_PIN, /*BUSY=*/ BUSY_PIN)); // 400x300, SSD1683