diff --git a/examples/GxEPD2_WiFi_CertStore_Example/GxEPD2_WiFi_CertStore_Example.ino b/examples/GxEPD2_WiFi_CertStore_Example/GxEPD2_WiFi_CertStore_Example.ino
index 4c1d887..3fc6b5a 100644
--- a/examples/GxEPD2_WiFi_CertStore_Example/GxEPD2_WiFi_CertStore_Example.ino
+++ b/examples/GxEPD2_WiFi_CertStore_Example/GxEPD2_WiFi_CertStore_Example.ino
@@ -45,6 +45,7 @@
 // select the display class (only one), matching the kind of display panel
 #define GxEPD2_DISPLAY_CLASS GxEPD2_BW
 //#define GxEPD2_DISPLAY_CLASS GxEPD2_3C
+//#define GxEPD2_DISPLAY_CLASS GxEPD2_4C
 //#define GxEPD2_DISPLAY_CLASS GxEPD2_7C
 
 // select the display driver class (only one) for your  panel
@@ -56,15 +57,15 @@
 //#define GxEPD2_DRIVER_CLASS GxEPD2_154_M09 // GDEW0154M09 200x200, JD79653A, (WFT0154CZB3)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_154_M10 // GDEW0154M10 152x152, UC8151D, (WFT0154CZ17)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_154_GDEY0154D67 // GDEY0154D67 200x200, SSD1681, (FPC-B001 20.05.21)
-//#define GxEPD2_DRIVER_CLASS GxEPD2_213     // GDE0213B1   128x250, IL3895, (HINK-E0213-G01), phased out
-//#define GxEPD2_DRIVER_CLASS GxEPD2_213_B72 // GDEH0213B72 128x250, SSD1675A (IL3897), (HINK-E0213A22-A0 SLH1852)
-//#define GxEPD2_DRIVER_CLASS GxEPD2_213_B73 // GDEH0213B73 128x250, SSD1675B, (HINK-E0213A22-A0 SLH1914)
-//#define GxEPD2_DRIVER_CLASS GxEPD2_213_B74 // GDEM0213B74 128x250, SSD1680, FPC-7528B)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_213     // GDE0213B1   122x250, IL3895, (HINK-E0213-G01), phased out
+//#define GxEPD2_DRIVER_CLASS GxEPD2_213_B72 // GDEH0213B72 122x250, SSD1675A (IL3897), (HINK-E0213A22-A0 SLH1852)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_213_B73 // GDEH0213B73 122x250, SSD1675B, (HINK-E0213A22-A0 SLH1914)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_213_B74 // GDEM0213B74 122x250, SSD1680, FPC-7528B)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_213_flex // GDEW0213I5F 104x212, UC8151 (IL0373), (WFT0213CZ16)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_213_M21 // GDEW0213M21 104x212, UC8151 (IL0373), (WFT0213CZ16)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_213_T5D // GDEW0213T5D 104x212, UC8151D, (WFT0213CZ16)
-//#define GxEPD2_DRIVER_CLASS GxEPD2_213_BN // DEPG0213BN  128x250, SSD1680, (FPC-7528B), TTGO T5 V2.4.1, V2.3.1
-//#define GxEPD2_DRIVER_CLASS GxEPD2_213_GDEY0213B74 // GDEY0213B74 128x250, SSD1680, (FPC-A002 20.04.08)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_213_BN // DEPG0213BN  122x250, SSD1680, (FPC-7528B), TTGO T5 V2.4.1, V2.3.1
+//#define GxEPD2_DRIVER_CLASS GxEPD2_213_GDEY0213B74 // GDEY0213B74 122x250, SSD1680, (FPC-A002 20.04.08)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_260     // GDEW026T0   152x296, UC8151 (IL0373), (WFT0154CZ17)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_260_M01 // GDEW026M01  152x296, UC8151 (IL0373), (WFT0260CZB2)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_266_BN // DEPG0266BN   152x296, SSD1680, (FPC7510), TTGO T5 V2.66, TTGO T5 V2.4.1
@@ -86,6 +87,8 @@
 //#define GxEPD2_DRIVER_CLASS GxEPD2_420     // GDEW042T2   400x300, UC8176 (IL0398), (WFT042CZ15)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_420_M01 // GDEW042M01  400x300, UC8176 (IL0398), (WFT042CZ15)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_420_GDEY042T81 // GDEY042T81 400x300, SSD1683 (no inking)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_420_GYE042A87  // GYE042A87, 400x300, SSD1683 (HINK-E042-A07-FPC-A1)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_420_SE0420NQ04 // SE0420NQ04, 400x300, UC8276C (OPM042A2_V1.0)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_426_GDEQ0426T82 // GDEQ0426T82 480x800, SSD1677 (P426010-MF1-A)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_583     // GDEW0583T7  600x448, UC8159c (IL0371), (missing)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_583_T8  // GDEW0583T8  648x480, EK79655 (GD7965), (WFT0583CZ61)
@@ -93,8 +96,10 @@
 //#define GxEPD2_DRIVER_CLASS GxEPD2_750     // GDEW075T8   640x384, UC8159c (IL0371), (WF0583CZ09)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_750_T7  // GDEW075T7   800x480, EK79655 (GD7965), (WFT0583CZ61)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_750_GDEY075T7  // GDEY075T7  800x480, UC8179 (GD7965), (FPC-C001 20.08.20)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_1020_GDEM102T91 // GDEM102T91 960x640, SSD1677, (FPC7705 REV.b)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_1160_T91 // GDEH116T91 960x640, SSD1677, (none or hidden)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_1248     // GDEW1248T3 1304x984, UC8179, (WFT1248BZ23,WFT1248BZ24)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_1330_GDEM133T91 // GDEM133T91 960x680, SSD1677, (FPC-7701 REV.B)
 // 3-color e-papers
 //#define GxEPD2_DRIVER_CLASS GxEPD2_154c     // GDEW0154Z04 200x200, IL0376F, (WFT0000CZ04), no longer available
 //#define GxEPD2_DRIVER_CLASS GxEPD2_154_Z90c // GDEH0154Z90 200x200, SSD1681, (HINK-E154A07-A1)
@@ -110,10 +115,13 @@
 //#define GxEPD2_DRIVER_CLASS GxEPD2_420c_Z21 // GDEQ042Z21  400x300, UC8276, (hidden)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_583c     // GDEW0583Z21 600x448, UC8159c (IL0371), (missing)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_583c_Z83 // GDEW0583Z83 648x480, EK79655 (GD7965), (WFT0583CZ61)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_583c_GDEQ0583Z31 // GDEQ0583Z31 648x480, UC8179C, 
 //#define GxEPD2_DRIVER_CLASS GxEPD2_750c     // GDEW075Z09  640x384, UC8159c (IL0371), (WF0583CZ09)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_750c_Z08 // GDEW075Z08  800x480, EK79655 (GD7965), (WFT0583CZ61)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_750c_Z90 // GDEH075Z90  880x528, SSD1677, (HINK-E075A07-A0)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_1160c_GDEY116Z91 // GDEY116Z91 960x640, SSD1677, (FPV-K002 22.04.15)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_1248c    // GDEY1248Z51 1304x984, UC8179, (WFT1248BZ23,WFT1248BZ24)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_1330c_GDEM133Z91 // GDEM133Z91 960x680, SSD1677 (FPC-7701 REV.B)
 // 4-color e-paper
 //#define GxEPD2_DRIVER_CLASS GxEPD2_266c_GDEY0266F51H // GDEY0266F51H 184x360, JD79667 (FPC-H006 22.04.02)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_290c_GDEY029F51H // GDEY029F51H 168x384, JD79667 (FPC-H004 22.03.24)
@@ -138,23 +146,25 @@
 // somehow there should be an easier way to do this
 #define GxEPD2_BW_IS_GxEPD2_BW true
 #define GxEPD2_3C_IS_GxEPD2_3C true
+#define GxEPD2_4C_IS_GxEPD2_4C true
 #define GxEPD2_7C_IS_GxEPD2_7C true
 #define GxEPD2_1248_IS_GxEPD2_1248 true
 #define GxEPD2_1248c_IS_GxEPD2_1248c true
 #define IS_GxEPD(c, x) (c##x)
 #define IS_GxEPD2_BW(x) IS_GxEPD(GxEPD2_BW_IS_, x)
 #define IS_GxEPD2_3C(x) IS_GxEPD(GxEPD2_3C_IS_, x)
+#define IS_GxEPD2_4C(x) IS_GxEPD(GxEPD2_4C_IS_, x)
 #define IS_GxEPD2_7C(x) IS_GxEPD(GxEPD2_7C_IS_, x)
 #define IS_GxEPD2_1248(x) IS_GxEPD(GxEPD2_1248_IS_, x)
 #define IS_GxEPD2_1248c(x) IS_GxEPD(GxEPD2_1248c_IS_, x)
 
 #if defined (ESP8266)
-#define MAX_DISPLAY_BUFFER_SIZE (81920ul-34000ul-35000ul) // ~34000 base use, WiFiClientSecure seems to need about 35k more to work (with CertStore)
+#define MAX_DISPLAY_BUFFER_SIZE (81920ul-34000ul-38000ul) // ~34000 base use, WiFiClientSecure seems to need about 38k more to work (with CertStore)
 // for site people.math.sc.edu an increased RX buffer is required for timely decodes, client.setBufferSizes(8192, 4096); // may help. needs more space:
-//#define MAX_DISPLAY_BUFFER_SIZE (81920ul-34000ul-37000ul) // ~34000 base use, WiFiClientSecure seems to need about 37k more to work (with CertStore)
+//#define MAX_DISPLAY_BUFFER_SIZE (81920ul-34000ul-38000ul) // ~34000 base use, WiFiClientSecure seems to need about 38k more to work (with CertStore)
 #if IS_GxEPD2_BW(GxEPD2_DISPLAY_CLASS)
 #define MAX_HEIGHT(EPD) (EPD::HEIGHT <= MAX_DISPLAY_BUFFER_SIZE / (EPD::WIDTH / 8) ? EPD::HEIGHT : MAX_DISPLAY_BUFFER_SIZE / (EPD::WIDTH / 8))
-#elif IS_GxEPD2_3C(GxEPD2_DISPLAY_CLASS)
+#elif IS_GxEPD2_3C(GxEPD2_DISPLAY_CLASS) || IS_GxEPD2_4C(GxEPD2_DISPLAY_CLASS)
 #define MAX_HEIGHT(EPD) (EPD::HEIGHT <= (MAX_DISPLAY_BUFFER_SIZE / 2) / (EPD::WIDTH / 8) ? EPD::HEIGHT : (MAX_DISPLAY_BUFFER_SIZE / 2) / (EPD::WIDTH / 8))
 #elif IS_GxEPD2_7C(GxEPD2_DISPLAY_CLASS)
 #define MAX_HEIGHT(EPD) (EPD::HEIGHT <= (MAX_DISPLAY_BUFFER_SIZE) / (EPD::WIDTH / 2) ? EPD::HEIGHT : (MAX_DISPLAY_BUFFER_SIZE) / (EPD::WIDTH / 2))
@@ -165,13 +175,15 @@ GxEPD2_DISPLAY_CLASS<GxEPD2_DRIVER_CLASS, MAX_HEIGHT(GxEPD2_DRIVER_CLASS)> displ
 //GxEPD2_DISPLAY_CLASS<GxEPD2_DRIVER_CLASS, MAX_HEIGHT(GxEPD2_DRIVER_CLASS)> display(GxEPD2_DRIVER_CLASS(/*CS=15*/ EPD_CS, /*DC=4*/ 4, /*RST=2*/ 2, /*BUSY=5*/ 5));
 // mapping of Waveshare e-Paper ESP8266 Driver Board, old version
 //GxEPD2_DISPLAY_CLASS<GxEPD2_DRIVER_CLASS, MAX_HEIGHT(GxEPD2_DRIVER_CLASS)> display(GxEPD2_DRIVER_CLASS(/*CS=15*/ EPD_CS, /*DC=4*/ 4, /*RST=5*/ 5, /*BUSY=16*/ 16));
+#undef MAX_DISPLAY_BUFFER_SIZE
+#undef MAX_HEIGHT
 #endif
 
 #if defined(ESP32)
 #define MAX_DISPLAY_BUFFER_SIZE 65536ul // e.g.
 #if IS_GxEPD2_BW(GxEPD2_DISPLAY_CLASS)
 #define MAX_HEIGHT(EPD) (EPD::HEIGHT <= MAX_DISPLAY_BUFFER_SIZE / (EPD::WIDTH / 8) ? EPD::HEIGHT : MAX_DISPLAY_BUFFER_SIZE / (EPD::WIDTH / 8))
-#elif IS_GxEPD2_3C(GxEPD2_DISPLAY_CLASS)
+#elif IS_GxEPD2_3C(GxEPD2_DISPLAY_CLASS) || IS_GxEPD2_4C(GxEPD2_DISPLAY_CLASS)
 #define MAX_HEIGHT(EPD) (EPD::HEIGHT <= (MAX_DISPLAY_BUFFER_SIZE / 2) / (EPD::WIDTH / 8) ? EPD::HEIGHT : (MAX_DISPLAY_BUFFER_SIZE / 2) / (EPD::WIDTH / 8))
 #elif IS_GxEPD2_7C(GxEPD2_DISPLAY_CLASS)
 #define MAX_HEIGHT(EPD) (EPD::HEIGHT <= (MAX_DISPLAY_BUFFER_SIZE) / (EPD::WIDTH / 2) ? EPD::HEIGHT : (MAX_DISPLAY_BUFFER_SIZE) / (EPD::WIDTH / 2))
@@ -185,6 +197,7 @@ GxEPD2_DISPLAY_CLASS<GxEPD2_DRIVER_CLASS, MAX_HEIGHT(GxEPD2_DRIVER_CLASS)> displ
 //GxEPD2_DISPLAY_CLASS<GxEPD2_DRIVER_CLASS, MAX_HEIGHT(GxEPD2_DRIVER_CLASS)> display(GxEPD2_DRIVER_CLASS(/*CS=5*/ 5, /*DC=*/ 17, /*RST=*/ 16, /*BUSY=*/ 4)); // LILYGO_T5_V2.4.1
 //GxEPD2_DISPLAY_CLASS<GxEPD2_DRIVER_CLASS, MAX_HEIGHT(GxEPD2_DRIVER_CLASS)> display(GxEPD2_DRIVER_CLASS(/*CS=5*/ EPD_CS, /*DC=*/ 19, /*RST=*/ 4, /*BUSY=*/ 34)); // LILYGO® TTGO T5 2.66
 //GxEPD2_DISPLAY_CLASS<GxEPD2_DRIVER_CLASS, MAX_HEIGHT(GxEPD2_DRIVER_CLASS)> display(GxEPD2_DRIVER_CLASS(/*CS=5*/ EPD_CS, /*DC=*/ 2, /*RST=*/ 0, /*BUSY=*/ 4)); // e.g. TTGO T8 ESP32-WROVER
+//GxEPD2_DISPLAY_CLASS<GxEPD2_DRIVER_CLASS, MAX_HEIGHT(GxEPD2_DRIVER_CLASS)> display(GxEPD2_DRIVER_CLASS(/*CS=*/ 15, /*DC=*/ 27, /*RST=*/ 26, /*BUSY=*/ 25)); // Waveshare ESP32 Driver Board
 #endif
 #else // GxEPD2_1248 or GxEPD2_1248c
 // Waveshare 12.48 b/w or b/w/r SPI display board and frame or Good Display 12.48 b/w panel GDEW1248T3 or b/w/r panel GDEY1248Z51
@@ -194,6 +207,8 @@ GxEPD2_DISPLAY_CLASS < GxEPD2_DRIVER_CLASS, MAX_HEIGHT(GxEPD2_DRIVER_CLASS) > di
     /*dc1=*/ 25, /*dc2=*/ 17, /*rst1=*/ 33, /*rst2=*/ 5,
     /*busy_m1=*/ 32, /*busy_s1=*/ 26, /*busy_m2=*/ 18, /*busy_s2=*/ 4));
 #endif
+#undef MAX_DISPLAY_BUFFER_SIZE
+#undef MAX_HEIGHT
 #endif
 
 #if defined (ESP8266)
@@ -225,7 +240,7 @@ const char* password = "........";
 const int httpPort  = 80;
 const int httpsPort = 443;
 
-const char* fp_rawcontent     = "8F 0E 79 24 71 C5 A7 D2 A7 46 76 30 C1 3C B7 2A 13 B0 01 B2"; // as of 29.7.2022
+const char* fp_rawcontent     = "97:D8:C5:70:0F:12:24:6C:88:BC:FA:06:7E:8C:A7:4D:A8:62:67:28"; // SHA-1 as of 12.04.2024
 
 const char* host_rawcontent   = "raw.githubusercontent.com";
 const char* path_rawcontent   = "/ZinggJM/GxEPD2/master/extras/bitmaps/";
@@ -260,6 +275,14 @@ void setup()
   SPI.begin(13, 12, 14, 15); // map and init SPI pins SCK(13), MISO(12), MOSI(14), SS(15)
 #endif
 
+  if (display.pages() > 1)
+  {
+    delay(100);
+    Serial.println();
+    Serial.print("pages = "); Serial.print(display.pages()); Serial.print(" page height = "); Serial.println(display.pageHeight());
+    delay(1000);
+  }
+
 #ifdef RE_INIT_NEEDED
   WiFi.persistent(true);
   WiFi.mode(WIFI_STA); // switch off AP
@@ -280,7 +303,7 @@ void setup()
     Serial.println(ssid);
     WiFi.begin(ssid, password);
   }
-  int ConnectTimeout = 30; // 15 seconds
+  int ConnectTimeout = 60; // 30 seconds
   while (WiFi.status() != WL_CONNECTED)
   {
     delay(500);
@@ -1022,7 +1045,8 @@ void showBitmapFrom_HTTPS(const char* host, const char* path, const char* filena
   Serial.println(); Serial.print("downloading file \""); Serial.print(filename);  Serial.println("\"");
   Serial.print("connecting to "); Serial.println(host);
 #if defined (ESP8266)
-  client.setBufferSizes(4096, 4096); // required
+  //client.setBufferSizes(4096, 4096); // required
+  client.setBufferSizes(8192, 4096); // may help for some sites
   client.setCertStore(&certStore);
 #elif defined (ESP32)
   if (certificate) client.setCACert(certificate);
diff --git a/examples/GxEPD2_WiFi_CertStore_Example/GxEPD2_github_raw_certs.h b/examples/GxEPD2_WiFi_CertStore_Example/GxEPD2_github_raw_certs.h
index 12d202e..75ad698 100644
--- a/examples/GxEPD2_WiFi_CertStore_Example/GxEPD2_github_raw_certs.h
+++ b/examples/GxEPD2_WiFi_CertStore_Example/GxEPD2_github_raw_certs.h
@@ -1,3 +1,44 @@
+// how to find the certificate was not easy. finally I found it using Mozilla Firefox.
+// opened one of the bitmaps, e.g. https://raw.githubusercontent.com/ZinggJM/GxEPD2/master/extras/bitmaps/logo200x200.bmp
+// clicked the lock symbol, Connection secure clicked >, show connection details, clicked More Information, clicked View Certificate, clicked Download PEM (cert),
+// Opened the .pem file and copied the pem into R"CERT(...)CERT"; strings.
+// for https://raw.githubusercontent.com the pem works on ESP8266 and ESP32, if time is set from ntp.
+// but using a root certificate would preferred, as its validity may be longer. But this failed now.
+
+const char github_io_pem [] PROGMEM = R"CERT(
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+)CERT";
+
+// 12:04.2024: the following no longer works, needs further investigation
+// **********************************************************************
+
 // http://cacerts.digicert.com/DigiCertTLSRSASHA2562020CA1-1.crt
 // CN: DigiCert TLS RSA SHA256 2020 CA1 => name: DigiCert_TLS_RSA_SHA256_2020_CA1
 // not valid before: 2021-04-14 00:00:00
@@ -36,106 +77,108 @@ A7sKPPcw7+uvTPyLNhBzPvOk
 // how to find the certificate was not easy. finally I found it using Mozilla Firefox.
 // opened one of the bitmaps, e.g. https://raw.githubusercontent.com/ZinggJM/GxEPD2/master/extras/bitmaps/logo200x200.bmp
 // clicked the lock symbol, Connection secure clicked >, show connection details, clicked More Information, clicked View Certificate, clicked Download PEM (chain),
-// selected Open with Notepad. Copied the middle certificate and edited to the following format:
-// the number of characters per line is of no importance, but the 3 \n are needed
+// Opened the .pem file and copied the pems into R"CERT(...)CERT"; strings.
+// for https://raw.githubusercontent.com all three pems work on ESP8266 and ESP32, if time is set from ntp.
+// but using a root certificate is preferred, as its validity may be longer.
 
 // https://raw.githubusercontent.com
 // issued by DigiCert Inc : DigiCert TLS RSA SHA256 2020 CA1
-// not valid before: Fri, 18 Mar 2022 00:00:00 GMT
-// not valid after:  Tue, 21 Mar 2023 23:59:59 GMT
+// not valid before: Fri, 15 Mar 2024 00:00:00 GMT
+// not valid after:  Fri, 14 Mar 2025 23:59:59 GMT
 const char github_io_chain_pem_first [] PROGMEM = R"CERT(
 -----BEGIN CERTIFICATE-----
-MIIHEzCCBfugAwIBAgIQC44ztdGGen6l0VAu1+MWiTANBgkqhkiG9w0BAQsFADBP
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 -----END CERTIFICATE-----
 )CERT";
 const char github_io_chain_pem_second [] PROGMEM = R"CERT(
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
 )CERT";
 const char github_io_chain_pem_third [] PROGMEM = R"CERT(
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
 )CERT";
diff --git a/examples/GxEPD2_WiFi_CertStore_Loader/GxEPD2_WiFi_CertStore_Loader.ino b/examples/GxEPD2_WiFi_CertStore_Loader/GxEPD2_WiFi_CertStore_Loader.ino
index 968b274..80bc332 100644
--- a/examples/GxEPD2_WiFi_CertStore_Loader/GxEPD2_WiFi_CertStore_Loader.ino
+++ b/examples/GxEPD2_WiFi_CertStore_Loader/GxEPD2_WiFi_CertStore_Loader.ino
@@ -45,145 +45,40 @@ const char* password = "........";
 const int httpPort  = 80;
 const int httpsPort = 443;
 
-// http://cacerts.digicert.com/DigiCertTLSRSASHA2562020CA1-1.crt
-// CN: DigiCert TLS RSA SHA256 2020 CA1 => name: DigiCert_TLS_RSA_SHA256_2020_CA1
-// not valid before: 2021-04-14 00:00:00
-// not valid after:  2031-04-13 23:59:59
-const char cert_DigiCert_TLS_RSA_SHA256_2020_CA1 [] PROGMEM = R"CERT(
+const char github_io_pem [] PROGMEM = R"CERT(
 -----BEGIN CERTIFICATE-----
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-EXffPgK2fPOre3qGNm+499iTcc+G33Mw+nur7SpZyEKEOxEXGlLzyQ4UfaJbcme6
-ce1XR2bFuAJKZTRei9AqPCCcUZlM51Ke92sRKw2Sfh3oius2FkOH6ipjv3U/697E
-A7sKPPcw7+uvTPyLNhBzPvOk
------END CERTIFICATE-----
-)CERT";
-
-// https://raw.githubusercontent.com
-// issued by DigiCert Inc : DigiCert TLS RSA SHA256 2020 CA1
-// not valid before: Fri, 18 Mar 2022 00:00:00 GMT
-// not valid after:  Tue, 21 Mar 2023 23:59:59 GMT
-const char github_io_chain_pem_first [] PROGMEM = R"CERT(
------BEGIN CERTIFICATE-----
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-MIIBfwYKKwYBBAHWeQIEAgSCAW8EggFrAWkAdgDoPtDaPvUGNTLnVyi8iWvJA9PL
-0RFr7Otp4Xd9bQa9bgAAAX+dgO+dAAAEAwBHMEUCIQDOV8Qe7mebG+hhf+MfzEEF
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-f88AdgA1zxkbv7FsV78PrUxtQsu7ticgJlHqP+Eq76gDwzvWTAAAAX+dgO/rAAAE
-AwBHMEUCIDAKos+w1Y1esfHWzcjREKA0m/fEoyMxA8Cj5EZETZziAiEAkxIcc6ZB
-3d7pHTI2w1yuRp1s6uciDTU/ICZ5yEvuFtwAdwC3Pvsk35xNunXyOcW6WPRsXfxC
-z3qfNcSeHQmBJe20mQAAAX+dgO/PAAAEAwBIMEYCIQDDYK04bMarexB4cqaAhnUF
-FItaejcjp7CeW+YtF70CzAIhAK5Fy7ARpPdjNoaSWuG1NzNZbj6DPfwdsFOZnoBq
-4GLhMA0GCSqGSIb3DQEBCwUAA4IBAQBokieSf5eLa7o62sPf9ihHuvIPoligvH1r
-gxFf6+kgsz+EwtF80Tb0ZR2DC7O2HSi0JGiihPgKO/3bXHZUc9cc4NkL7J842yFI
-rRwPHABMq2nLq7LCuGdJn+2tG76DAOXCtHMQ6XfuAq1FoPbtxXdWzynOJdDelPC6
-Qv3v3sMH6gJML1vW3OmeSUIncu686uDTs6E95BIuZ8eOjBjxZ7GfQv54RQU6oiMf
-bYVRSYaNfnS0VkPlwcR9Ubhx9wEuG4GuDus7OWItwFqm2c3peKQQK8+2CDMUHDUC
-QafDHvXcWeRdqQouCQC1tDlRAzPLKTcLD6EVltnPR5HQITRvHVgm
------END CERTIFICATE-----
-)CERT";
-const char github_io_chain_pem_second [] PROGMEM = R"CERT(
------BEGIN CERTIFICATE-----
-MIIEvjCCA6agAwIBAgIQBtjZBNVYQ0b2ii+nVCJ+xDANBgkqhkiG9w0BAQsFADBh
-MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3
-d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBD
-QTAeFw0yMTA0MTQwMDAwMDBaFw0zMTA0MTMyMzU5NTlaME8xCzAJBgNVBAYTAlVT
-MRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxKTAnBgNVBAMTIERpZ2lDZXJ0IFRMUyBS
-U0EgU0hBMjU2IDIwMjAgQ0ExMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKC
-AQEAwUuzZUdwvN1PWNvsnO3DZuUfMRNUrUpmRh8sCuxkB+Uu3Ny5CiDt3+PE0J6a
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-g9/n00tnTCJRpt8OmRDtV1F0JuJ9x8piLhMbfyOIJVNvwTRYAIuE//i+p1hJInuW
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-/wIBADAdBgNVHQ4EFgQUt2ui6qiqhIx56rTaD5iyxZV2ufQwHwYDVR0jBBgwFoAU
-A95QNVbRTLtm8KPiGxvDl7I90VUwDgYDVR0PAQH/BAQDAgGGMB0GA1UdJQQWMBQG
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-MAgGBmeBDAECATAIBgZngQwBAgIwCAYGZ4EMAQIDMA0GCSqGSIb3DQEBCwUAA4IB
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-ce1XR2bFuAJKZTRei9AqPCCcUZlM51Ke92sRKw2Sfh3oius2FkOH6ipjv3U/697E
-A7sKPPcw7+uvTPyLNhBzPvOk
------END CERTIFICATE-----
-)CERT";
-const char github_io_chain_pem_third [] PROGMEM = R"CERT(
------BEGIN CERTIFICATE-----
-MIIDrzCCApegAwIBAgIQCDvgVpBCRrGhdWrJWZHHSjANBgkqhkiG9w0BAQUFADBh
-MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3
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+JCqVJUzKoZHm1Lesh3Sz8W2jmdv51b2EQJ8HmA==
 -----END CERTIFICATE-----
 )CERT";
 
 const char* host_rawcontent  = "raw.githubusercontent.com";
 const char* path_certstore_raw   = "/ZinggJM/GxEPD2/master/examples/GxEPD2_WiFi_CertStore_Loader/";
-const char* fp_github_io     = "8F 0E 79 24 71 C5 A7 D2 A7 46 76 30 C1 3C B7 2A 13 B0 01 B2"; // as of 29.7.2022
+const char* fp_github_io     = "97:D8:C5:70:0F:12:24:6C:88:BC:FA:06:7E:8C:A7:4D:A8:62:67:28"; // SHA-1 as of 12.04.2024
 
 void setup()
 {
@@ -260,10 +155,11 @@ void downloadFile_HTTPS(const char* host, const char* path, const char* filename
   // Use WiFiClientSecure class to create TLS connection
 #if defined (ESP8266)
   BearSSL::WiFiClientSecure client;
-  BearSSL::X509List cert(cert_DigiCert_TLS_RSA_SHA256_2020_CA1);
-  BearSSL::X509List cert_pem_first(github_io_chain_pem_first);
-  BearSSL::X509List cert_pem_second(github_io_chain_pem_second);
-  BearSSL::X509List cert_pem_third(github_io_chain_pem_third);
+//  BearSSL::X509List cert(cert_DigiCert_TLS_RSA_SHA256_2020_CA1);
+//  BearSSL::X509List cert_pem_first(github_io_chain_pem_first);
+//  BearSSL::X509List cert_pem_second(github_io_chain_pem_second);
+//  BearSSL::X509List cert_pem_third(github_io_chain_pem_third);
+  BearSSL::X509List cert_pem(github_io_pem);
 #else
   WiFiClientSecure client;
 #endif
@@ -275,7 +171,8 @@ void downloadFile_HTTPS(const char* host, const char* path, const char* filename
   //client.setTrustAnchors(&cert_pem_first); // should work until Tue, 21 Mar 2023 23:59:59 GMT
   //client.setTrustAnchors(&cert_pem_second); // should work until Tue, 21 Mar 2023 23:59:59 GMT
   //client.setTrustAnchors(&cert_pem_third); // should work until Tue, 21 Mar 2023 23:59:59 GMT
-  client.setTrustAnchors(&cert); // should work until 2031-04-13 23:59:59
+  //client.setTrustAnchors(&cert); // should work until 2031-04-13 23:59:59
+  client.setTrustAnchors(&cert_pem); // should work until Fri, 14 Mar 2025 23:59:59 GMT
 #elif defined (ESP32)
   client.setCACert(cert_DigiCert_TLS_RSA_SHA256_2020_CA1);
 #endif
diff --git a/examples/GxEPD2_WiFi_Example/GxEPD2_WiFi_Example.ino b/examples/GxEPD2_WiFi_Example/GxEPD2_WiFi_Example.ino
index dcad95b..cbb6390 100644
--- a/examples/GxEPD2_WiFi_Example/GxEPD2_WiFi_Example.ino
+++ b/examples/GxEPD2_WiFi_Example/GxEPD2_WiFi_Example.ino
@@ -32,6 +32,7 @@
 
 #include <GxEPD2_BW.h>
 #include <GxEPD2_3C.h>
+#include <GxEPD2_4C.h>
 #include <GxEPD2_7C.h>
 
 // NOTE: you may need to adapt or select for your wiring in the processor specific conditional compile sections below
@@ -75,21 +76,25 @@
 //#define GxEPD2_DRIVER_CLASS GxEPD2_290_BS // DEPG0290BS  128x296, SSD1680, (FPC-7519 rev.b)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_290_M06 // GDEW029M06  128x296, UC8151D, (WFT0290CZ10)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_290_GDEY029T94 // GDEY029T94 128x296, SSD1680, (FPC-A005 20.06.15)
-#define GxEPD2_DRIVER_CLASS GxEPD2_310_GDEQ031T10 // GDEQ031T10 240x320, UC8253, (no inking, backside mark KEGMO 3100)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_310_GDEQ031T10 // GDEQ031T10 240x320, UC8253, (no inking, backside mark KEGMO 3100)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_371     // GDEW0371W7  240x416, UC8171 (IL0324), (missing)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_370_TC1 // ED037TC1  280x480, SSD1677, (ICA-FU-20 ichia 2029), Waveshare 3.7"
 //#define GxEPD2_DRIVER_CLASS GxEPD2_420     // GDEW042T2   400x300, UC8176 (IL0398), (WFT042CZ15)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_420_M01 // GDEW042M01  400x300, UC8176 (IL0398), (WFT042CZ15)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_420_GDEY042T81 // GDEY042T81 400x300, SSD1683 (no inking)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_420_GYE042A87  // GYE042A87, 400x300, SSD1683 (HINK-E042-A07-FPC-A1)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_420_SE0420NQ04 // SE0420NQ04, 400x300, UC8276C (OPM042A2_V1.0)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_426_GDEQ0426T82 // GDEQ0426T82 480x800, SSD1677 (P426010-MF1-A)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_583     // GDEW0583T7  600x448, UC8159c (IL0371), (missing)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_583_T8  // GDEW0583T8  648x480, EK79655 (GD7965), (WFT0583CZ61)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_583_GDEQ0583T31 // GDEQ0583T31  648x480, UC8179, (P583010-MF1-B)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_750     // GDEW075T8   640x384, UC8159c (IL0371), (WF0583CZ09)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_750_T7  // GDEW075T7   800x480, EK79655 (GD7965), (WFT0583CZ61)
-//#define GxEPD2_DRIVER_CLASS GxEPD2_750_YT7  // GDEY075T7  800x480, UC8179 (GD7965), (FPC-C001 20.8.20)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_750_GDEY075T7  // GDEY075T7  800x480, UC8179 (GD7965), (FPC-C001 20.08.20)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_1020_GDEM102T91 // GDEM102T91 960x640, SSD1677, (FPC7705 REV.b)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_1160_T91 // GDEH116T91 960x640, SSD1677, (none or hidden)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_1248     // GDEW1248T3 1304x984, UC8179, (WFT1248BZ23,WFT1248BZ24)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_1330_GDEM133T91 // GDEM133T91 960x680, SSD1677, (FPC-7701 REV.B)
 // 3-color e-papers
 //#define GxEPD2_DRIVER_CLASS GxEPD2_154c     // GDEW0154Z04 200x200, IL0376F, (WFT0000CZ04), no longer available
 //#define GxEPD2_DRIVER_CLASS GxEPD2_154_Z90c // GDEH0154Z90 200x200, SSD1681, (HINK-E154A07-A1)
@@ -105,10 +110,13 @@
 //#define GxEPD2_DRIVER_CLASS GxEPD2_420c_Z21 // GDEQ042Z21  400x300, UC8276, (hidden)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_583c     // GDEW0583Z21 600x448, UC8159c (IL0371), (missing)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_583c_Z83 // GDEW0583Z83 648x480, EK79655 (GD7965), (WFT0583CZ61)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_583c_GDEQ0583Z31 // GDEQ0583Z31 648x480, UC8179C, 
 //#define GxEPD2_DRIVER_CLASS GxEPD2_750c     // GDEW075Z09  640x384, UC8159c (IL0371), (WF0583CZ09)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_750c_Z08 // GDEW075Z08  800x480, EK79655 (GD7965), (WFT0583CZ61)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_750c_Z90 // GDEH075Z90  880x528, SSD1677, (HINK-E075A07-A0)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_1160c_GDEY116Z91 // GDEY116Z91 960x640, SSD1677, (FPV-K002 22.04.15)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_1248c    // GDEY1248Z51 1304x984, UC8179, (WFT1248BZ23,WFT1248BZ24)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_1330c_GDEM133Z91 // GDEM133Z91 960x680, SSD1677 (FPC-7701 REV.B)
 // 4-color e-paper
 //#define GxEPD2_DRIVER_CLASS GxEPD2_266c_GDEY0266F51H // GDEY0266F51H 184x360, JD79667 (FPC-H006 22.04.02)
 //#define GxEPD2_DRIVER_CLASS GxEPD2_290c_GDEY029F51H // GDEY029F51H 168x384, JD79667 (FPC-H004 22.03.24)
@@ -118,6 +126,7 @@
 // 7-color e-paper
 //#define GxEPD2_DRIVER_CLASS GxEPD2_565c // Waveshare 5.65" 7-color
 //#define GxEPD2_DRIVER_CLASS GxEPD2_730c_GDEY073D46 // GDEY073D46 800x480 7-color, (N-FPC-001 2021.11.26)
+//#define GxEPD2_DRIVER_CLASS GxEPD2_730c_ACeP_730 // Waveshare 7.3" 7-color
 // grey levels parallel IF e-papers on Waveshare e-Paper IT8951 Driver HAT
 //#define GxEPD2_DRIVER_CLASS GxEPD2_it60           // ED060SCT 800x600
 //#define GxEPD2_DRIVER_CLASS GxEPD2_it60_1448x1072 // ED060KC1 1448x1072
@@ -244,17 +253,19 @@ const int httpsPort = 443;
 
 #include "GxEPD2_github_raw_certs.h"
 
-const char* certificate_rawcontent = cert_DigiCert_TLS_RSA_SHA256_2020_CA1; // ok, should work until 2031-04-13 23:59:59
-//const char* certificate_rawcontent = github_io_chain_pem_first;  // ok, should work until Tue, 21 Mar 2023 23:59:59 GMT
-//const char* certificate_rawcontent = github_io_chain_pem_second;  // ok, should work until Tue, 21 Mar 2023 23:59:59 GMT
-//const char* certificate_rawcontent = github_io_chain_pem_third;  // ok, should work until Tue, 21 Mar 2023 23:59:59 GMT
+const char* certificate_rawcontent = github_io_pem;  // ok, should work until Fri, 14 Mar 2025 23:59:59 GMT
+
+//const char* certificate_rawcontent = cert_DigiCert_TLS_RSA_SHA256_2020_CA1; // not ok, should work until 2031-04-13 23:59:59
+//const char* certificate_rawcontent = github_io_chain_pem_first;  // not ok, should work until Fri, 14 Mar 2025 23:59:59 GMT
+//const char* certificate_rawcontent = github_io_chain_pem_second;  // ok, should work until Fri, 14 Mar 2025 23:59:59 GMT
+//const char* certificate_rawcontent = github_io_chain_pem_third;  // not ok, should work until Fri, 14 Mar 2025 23:59:59 GMT
 
 const char* host_rawcontent   = "raw.githubusercontent.com";
 const char* path_rawcontent   = "/ZinggJM/GxEPD2/master/extras/bitmaps/";
 const char* path_prenticedavid   = "/prenticedavid/MCUFRIEND_kbv/master/extras/bitmaps/";
 const char* path_waveshare_c  = "/waveshare/e-Paper/master/RaspberryPi_JetsonNano/c/pic/";
 const char* path_waveshare_py = "/waveshare/e-Paper/master/RaspberryPi_JetsonNano/python/pic/";
-const char* fp_rawcontent     = "8F 0E 79 24 71 C5 A7 D2 A7 46 76 30 C1 3C B7 2A 13 B0 01 B2"; // as of 29.7.2022
+const char* fp_rawcontent     = "97:D8:C5:70:0F:12:24:6C:88:BC:FA:06:7E:8C:A7:4D:A8:62:67:28"; // SHA-1 as of 12.04.2024
 
 // note that BMP bitmaps are drawn at physical position in physical orientation of the screen
 void showBitmapFrom_HTTP(const char* host, const char* path, const char* filename, int16_t x, int16_t y, bool with_color = true);
diff --git a/examples/GxEPD2_WiFi_Example/GxEPD2_github_raw_certs.h b/examples/GxEPD2_WiFi_Example/GxEPD2_github_raw_certs.h
index 2657719..75ad698 100644
--- a/examples/GxEPD2_WiFi_Example/GxEPD2_github_raw_certs.h
+++ b/examples/GxEPD2_WiFi_Example/GxEPD2_github_raw_certs.h
@@ -1,3 +1,44 @@
+// how to find the certificate was not easy. finally I found it using Mozilla Firefox.
+// opened one of the bitmaps, e.g. https://raw.githubusercontent.com/ZinggJM/GxEPD2/master/extras/bitmaps/logo200x200.bmp
+// clicked the lock symbol, Connection secure clicked >, show connection details, clicked More Information, clicked View Certificate, clicked Download PEM (cert),
+// Opened the .pem file and copied the pem into R"CERT(...)CERT"; strings.
+// for https://raw.githubusercontent.com the pem works on ESP8266 and ESP32, if time is set from ntp.
+// but using a root certificate would preferred, as its validity may be longer. But this failed now.
+
+const char github_io_pem [] PROGMEM = R"CERT(
+-----BEGIN CERTIFICATE-----
+MIIEyDCCA7CgAwIBAgIQDPW9BitWAvR6uFAsI8zwZjANBgkqhkiG9w0BAQsFADBh
+MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3
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+wcW1BSAuWdH/SvWgKtiwla3JLko716f2b4gp/DA/JIS7w7d7kwcsr4drdjPtAFVS
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+JCqVJUzKoZHm1Lesh3Sz8W2jmdv51b2EQJ8HmA==
+-----END CERTIFICATE-----
+)CERT";
+
+// 12:04.2024: the following no longer works, needs further investigation
+// **********************************************************************
+
 // http://cacerts.digicert.com/DigiCertTLSRSASHA2562020CA1-1.crt
 // CN: DigiCert TLS RSA SHA256 2020 CA1 => name: DigiCert_TLS_RSA_SHA256_2020_CA1
 // not valid before: 2021-04-14 00:00:00
@@ -42,101 +83,102 @@ A7sKPPcw7+uvTPyLNhBzPvOk
 
 // https://raw.githubusercontent.com
 // issued by DigiCert Inc : DigiCert TLS RSA SHA256 2020 CA1
-// not valid before: Fri, 18 Mar 2022 00:00:00 GMT
-// not valid after:  Tue, 21 Mar 2023 23:59:59 GMT
+// not valid before: Fri, 15 Mar 2024 00:00:00 GMT
+// not valid after:  Fri, 14 Mar 2025 23:59:59 GMT
 const char github_io_chain_pem_first [] PROGMEM = R"CERT(
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
 )CERT";
 const char github_io_chain_pem_second [] PROGMEM = R"CERT(
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
 )CERT";
 const char github_io_chain_pem_third [] PROGMEM = R"CERT(
 -----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
 )CERT";