// GxEPD_WiFi_Example : Display Library example for SPI e-paper panels from Dalian Good Display and boards from Waveshare. // Requires HW SPI and Adafruit_GFX. Caution: these e-papers require 3.3V supply AND data lines! // // Display Library based on Demo Example from Good Display: http://www.e-paper-display.com/download_list/downloadcategoryid=34&isMode=false.html // // BMP handling code extracts taken from: https://github.com/prenticedavid/MCUFRIEND_kbv/tree/master/examples/showBMP_kbv_Uno // // Author: Jean-Marc Zingg // // Version: see library.properties // // Library: https://github.com/ZinggJM/GxEPD // Supporting Arduino Forum Topics: // Waveshare e-paper displays with SPI: http://forum.arduino.cc/index.php?topic=487007.0 // Good Dispay ePaper for Arduino : https://forum.arduino.cc/index.php?topic=436411.0 // mapping suggestion from Waveshare SPI e-Paper to Wemos D1 mini // BUSY -> D2, RST -> D4, DC -> D3, CS -> D8, CLK -> D5, DIN -> D7, GND -> GND, 3.3V -> 3.3V // mapping suggestion from Waveshare SPI e-Paper to generic ESP8266 // BUSY -> GPIO4, RST -> GPIO2, DC -> GPIO0, CS -> GPIO15, CLK -> GPIO14, DIN -> GPIO13, GND -> GND, 3.3V -> 3.3V // mapping of Waveshare e-Paper ESP8266 Driver Board // BUSY -> GPIO16, RST -> GPIO5, DC -> GPIO4, CS -> GPIO15, CLK -> GPIO14, DIN -> GPIO13, GND -> GND, 3.3V -> 3.3V // mapping suggestion for ESP32, e.g. LOLIN32, see .../variants/.../pins_arduino.h for your board // NOTE: there are variants with different pins for SPI ! CHECK SPI PINS OF YOUR BOARD // BUSY -> 4, RST -> 16, DC -> 17, CS -> SS(5), CLK -> SCK(18), DIN -> MOSI(23), GND -> GND, 3.3V -> 3.3V // new mapping suggestion for STM32F1, e.g. STM32F103C8T6 "BluePill" // BUSY -> A1, RST -> A2, DC -> A3, CS-> A4, CLK -> A5, DIN -> A7 // mapping suggestion for AVR, UNO, NANO etc. // BUSY -> 7, RST -> 9, DC -> 8, CS-> 10, CLK -> 13, DIN -> 11 // // mapping suggestion for Arduino MEGA // BUSY -> 7, RST -> 9, DC -> 8, CS-> 53, CLK -> 52, DIN -> 51 // mapping suggestion for Arduino DUE // BUSY -> 7, RST -> 9, DC -> 8, CS-> 77, CLK -> 76, DIN -> 75 // SPI pins are also on 6 pin 2x3 SPI header // include library, include base class, make path known #include // select the display class to use, only one //#include // 1.50" b/w //#include // 1.54" b/w //#include // 1.54" b/w 200x200, SSD1681 //#include // 1.54" b/w 152x152 UC8151 (IL0373) //#include // 1.54" b/w 200x200 JD79653A //#include // 1.54" b/w 152x152 UC8151D //#include // 1.54" b/w/r 200x200 //#include // 1.54" b/w/r 152x152 //#include // 1.54" b/w/r 200x200 SSD1681 //#include // 2.13" b/w 104x212 flexible //#include // 2.13" b/w //#include // 2.13" b/w new panel //#include // 2.13" b/w newer panel //#include // 2.13" b/w 128x250 SSD1680 //#include // 2.13" b/w/r //#include // 2.13" b/w/r UC8151D //#include // 2.13" b/w 104x212 UC8151D //#include // 2.13" b/w 128x250, SSD1680, TTGO T5 V2.4.1, V2.3.1 //#include // 2.9" b/w //#include // 2.9" b/w UC8151 (IL0373) //#include // 2.9" b/w UC8151D //#include // 2.9" b/w //#include // 2.9" b/w Waveshare variant, TTGO T5 V2.4.1 2.9" //#include // 2.9" b/w/r //#include // 2.9" b/w/r UC8151D //#include // 2.6" b/w //#include // 2.66" b/w 152x296, SSD1680, TTGO T5 V2.66, TTGO T5 V2.4.1 //#include // 2.7" b/w/r //#include // 2.7" b/w //#include // 2.7" b/w //#include // 3.7" b/w //#include // 4.2" b/w //#include // 4.2" b/w/r //#include // 5.83" b/w //#include // 7.5" b/w //#include // 7.5" b/w 800x480 //#include // 7.5" b/w/r //#include // 7.5" b/w/r 800x480 #include #include #if defined(ESP8266) // for SPI pin definitions see e.g.: // C:\Users\xxx\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.4.2\variants\generic\common.h GxIO_Class io(SPI, /*CS=D8*/ SS, /*DC=D3*/ 0, /*RST=D4*/ 2); // arbitrary selection of D3(=0), D4(=2), selected for default of GxEPD_Class GxEPD_Class display(io /*RST=D4*/ /*BUSY=D2*/); // default selection of D4(=2), D2(=4) // Heltec E-Paper 1.54" b/w without RST, BUSY //GxEPD_Class display(io, /*RST=D4*/ -1, /*BUSY=D2*/ -1); // no RST, no BUSY #elif defined(ESP32) // for SPI pin definitions see e.g.: // C:\Users\xxx\Documents\Arduino\hardware\espressif\esp32\variants\lolin32\pins_arduino.h GxIO_Class io(SPI, /*CS=5*/ SS, /*DC=*/ 17, /*RST=*/ 16); // arbitrary selection of 17, 16 GxEPD_Class display(io, /*RST=*/ 16, /*BUSY=*/ 4); // arbitrary selection of (16), 4 // for LILYGO® TTGO T5 2.66 board uncomment next two lines instead of previous two lines //GxIO_Class io(SPI, /*CS=5*/ SS, /*DC=*/ 19, /*RST=*/ 4); // LILYGO® TTGO T5 2.66 //GxEPD_Class display(io, /*RST=*/ 4, /*BUSY=*/ 34); // LILYGO® TTGO T5 2.66 #endif #if defined (ESP8266) #include #define USE_BearSSL true #endif #include #include const char* ssid = "........"; const char* password = "........"; const int httpPort = 80; const int httpsPort = 443; const char* fp_api_github_com = "df b2 29 c6 a6 38 1a 59 9d c9 ad 92 2d 26 f5 3c 83 8f a5 87"; // as of 25.11.2020 const char* fp_github_com = "5f 3f 7a c2 56 9f 50 a4 66 76 47 c6 a1 8c a0 07 aa ed bb 8e"; // as of 25.11.2020 //const char* fp_rawcontent = "70 94 de dd e6 c4 69 48 3a 92 70 a1 48 56 78 2d 18 64 e0 b7"; // as of 25.11.2020 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 // 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 editted to the following format: // the number of characters per line is of no importance, but the 3 \n are needed // Validity // Not Before Fri, 18 Mar 2022 00:00:00 GMT // Not After Tue, 21 Mar 2023 23:59:59 GMT const char* certificate_rawcontent = "-----BEGIN CERTIFICATE-----\n" "MIIEvjCCA6agAwIBAgIQBtjZBNVYQ0b2ii+nVCJ+xDANBgkqhkiG9w0BAQsFADBh" "MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3" "d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBD" "QTAeFw0yMTA0MTQwMDAwMDBaFw0zMTA0MTMyMzU5NTlaME8xCzAJBgNVBAYTAlVT" "MRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxKTAnBgNVBAMTIERpZ2lDZXJ0IFRMUyBS" "U0EgU0hBMjU2IDIwMjAgQ0ExMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKC" "AQEAwUuzZUdwvN1PWNvsnO3DZuUfMRNUrUpmRh8sCuxkB+Uu3Ny5CiDt3+PE0J6a" "qXodgojlEVbbHp9YwlHnLDQNLtKS4VbL8Xlfs7uHyiUDe5pSQWYQYE9XE0nw6Ddn" "g9/n00tnTCJRpt8OmRDtV1F0JuJ9x8piLhMbfyOIJVNvwTRYAIuE//i+p1hJInuW" "raKImxW8oHzf6VGo1bDtN+I2tIJLYrVJmuzHZ9bjPvXj1hJeRPG/cUJ9WIQDgLGB" "Afr5yjK7tI4nhyfFK3TUqNaX3sNk+crOU6JWvHgXjkkDKa77SU+kFbnO8lwZV21r" "eacroicgE7XQPUDTITAHk+qZ9QIDAQABo4IBgjCCAX4wEgYDVR0TAQH/BAgwBgEB" "/wIBADAdBgNVHQ4EFgQUt2ui6qiqhIx56rTaD5iyxZV2ufQwHwYDVR0jBBgwFoAU" "A95QNVbRTLtm8KPiGxvDl7I90VUwDgYDVR0PAQH/BAQDAgGGMB0GA1UdJQQWMBQG" "CCsGAQUFBwMBBggrBgEFBQcDAjB2BggrBgEFBQcBAQRqMGgwJAYIKwYBBQUHMAGG" "GGh0dHA6Ly9vY3NwLmRpZ2ljZXJ0LmNvbTBABggrBgEFBQcwAoY0aHR0cDovL2Nh" "Y2VydHMuZGlnaWNlcnQuY29tL0RpZ2lDZXJ0R2xvYmFsUm9vdENBLmNydDBCBgNV" "HR8EOzA5MDegNaAzhjFodHRwOi8vY3JsMy5kaWdpY2VydC5jb20vRGlnaUNlcnRH" "bG9iYWxSb290Q0EuY3JsMD0GA1UdIAQ2MDQwCwYJYIZIAYb9bAIBMAcGBWeBDAEB" "MAgGBmeBDAECATAIBgZngQwBAgIwCAYGZ4EMAQIDMA0GCSqGSIb3DQEBCwUAA4IB" "AQCAMs5eC91uWg0Kr+HWhMvAjvqFcO3aXbMM9yt1QP6FCvrzMXi3cEsaiVi6gL3z" "ax3pfs8LulicWdSQ0/1s/dCYbbdxglvPbQtaCdB73sRD2Cqk3p5BJl+7j5nL3a7h" "qG+fh/50tx8bIKuxT8b1Z11dmzzp/2n3YWzW2fP9NsarA4h20ksudYbj/NhVfSbC" "EXffPgK2fPOre3qGNm+499iTcc+G33Mw+nur7SpZyEKEOxEXGlLzyQ4UfaJbcme6" "ce1XR2bFuAJKZTRei9AqPCCcUZlM51Ke92sRKw2Sfh3oius2FkOH6ipjv3U/697E" "A7sKPPcw7+uvTPyLNhBzPvOk\n" "-----END CERTIFICATE-----\n"; 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/"; void showBitmapFrom_HTTP(const char* host, const char* path, const char* filename, int16_t x, int16_t y, bool with_color = true); void showBitmapFrom_HTTPS(const char* host, const char* path, const char* filename, const char* fingerprint, int16_t x, int16_t y, bool with_color = true, const char* certificate = certificate_rawcontent); void setup() { Serial.begin(115200); Serial.println(); Serial.println("GxEPD_WiFi_Example"); display.init(115200); #ifdef RE_INIT_NEEDED WiFi.persistent(true); WiFi.mode(WIFI_STA); // switch off AP WiFi.setAutoConnect(true); WiFi.setAutoReconnect(true); WiFi.disconnect(); #endif if (!WiFi.getAutoConnect() || ( WiFi.getMode() != WIFI_STA) || ((WiFi.SSID() != ssid) && String(ssid) != "........")) { Serial.println(); Serial.print("WiFi.getAutoConnect()="); Serial.println(WiFi.getAutoConnect()); Serial.print("WiFi.SSID()="); Serial.println(WiFi.SSID()); WiFi.mode(WIFI_STA); // switch off AP Serial.print("Connecting to "); Serial.println(ssid); WiFi.begin(ssid, password); } int ConnectTimeout = 30; // 15 seconds while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); Serial.print(WiFi.status()); if (--ConnectTimeout <= 0) { Serial.println(); Serial.println("WiFi connect timeout"); return; } } Serial.println(); Serial.println("WiFi connected"); // Print the IP address Serial.println(WiFi.localIP()); drawBitmaps_200x200(); drawBitmaps_other(); //drawBitmaps_test(); //drawBitmapsBuffered_test(); Serial.println("GxEPD_WiFi_Example done"); } void loop(void) { } void drawBitmaps_200x200() { int16_t x = (display.width() - 200) / 2; int16_t y = (display.height() - 200) / 2; showBitmapFrom_HTTPS(host_rawcontent, path_rawcontent, "logo200x200.bmp", fp_rawcontent, x, y); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_rawcontent, "first200x200.bmp", fp_rawcontent, x, y); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_rawcontent, "second200x200.bmp", fp_rawcontent, x, y); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_rawcontent, "third200x200.bmp", fp_rawcontent, x, y); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_rawcontent, "fourth200x200.bmp", fp_rawcontent, x, y); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_rawcontent, "fifth200x200.bmp", fp_rawcontent, x, y); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_rawcontent, "sixth200x200.bmp", fp_rawcontent, x, y); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_rawcontent, "seventh200x200.bmp", fp_rawcontent, x, y); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_rawcontent, "eighth200x200.bmp", fp_rawcontent, x, y); delay(2000); } void drawBitmaps_other() { int16_t w2 = display.width() / 2; int16_t h2 = display.height() / 2; showBitmapFrom_HTTP("www.squix.org", "/blog/wunderground/", "chanceflurries.bmp", w2 - 50, h2 - 50, false); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_prenticedavid, "betty_1.bmp", fp_rawcontent, w2 - 100, h2 - 160); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_prenticedavid, "betty_4.bmp", fp_rawcontent, w2 - 102, h2 - 126); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_prenticedavid, "marilyn_240x240x8.bmp", fp_rawcontent, w2 - 120, h2 - 120); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_prenticedavid, "miniwoof.bmp", fp_rawcontent, w2 - 60, h2 - 80); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_prenticedavid, "test.bmp", fp_rawcontent, w2 - 100, h2 - 100); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_prenticedavid, "tiger.bmp", fp_rawcontent, w2 - 160, h2 - 120); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_prenticedavid, "tiger_178x160x4.bmp", fp_rawcontent, w2 - 89, h2 - 80); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_prenticedavid, "tiger_240x317x4.bmp", fp_rawcontent, w2 - 120, h2 - 160); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_prenticedavid, "tiger_320x200x24.bmp", fp_rawcontent, w2 - 160, h2 - 100); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_prenticedavid, "tiger16T.bmp", fp_rawcontent, w2 - 160, h2 - 100); delay(2000); showBitmapFrom_HTTPS(host_rawcontent, path_prenticedavid, "woof.bmp", fp_rawcontent, w2 - 100, h2 - 100); delay(2000); } void drawBitmaps_test() { int16_t w2 = display.width() / 2; int16_t h2 = display.height() / 2; showBitmapFrom_HTTPS(host_rawcontent, path_prenticedavid, "betty_4.bmp", fp_rawcontent, w2 - 102, h2 - 126); delay(2000); } static const uint16_t input_buffer_pixels = 800; // may affect performance static const uint16_t max_row_width = 1448; // for up to 6" display 1448x1072 static const uint16_t max_palette_pixels = 256; // for depth <= 8 uint8_t input_buffer[3 * input_buffer_pixels]; // up to depth 24 uint8_t output_row_mono_buffer[max_row_width / 8]; // buffer for at least one row of b/w bits uint8_t output_row_color_buffer[max_row_width / 8]; // buffer for at least one row of color bits uint8_t mono_palette_buffer[max_palette_pixels / 8]; // palette buffer for depth <= 8 b/w uint8_t color_palette_buffer[max_palette_pixels / 8]; // palette buffer for depth <= 8 c/w void drawBitmapFrom_HTTP_ToBuffer(const char* host, const char* path, const char* filename, int16_t x, int16_t y, bool with_color) { WiFiClient client; bool connection_ok = false; bool valid = false; // valid format to be handled bool flip = true; // bitmap is stored bottom-to-top uint32_t startTime = millis(); if ((x >= display.width()) || (y >= display.height())) return; display.fillScreen(GxEPD_WHITE); Serial.print("connecting to "); Serial.println(host); if (!client.connect(host, httpPort)) { Serial.println("connection failed"); return; } Serial.print("requesting URL: "); Serial.println(String("http://") + host + path + filename); client.print(String("GET ") + path + filename + " HTTP/1.1\r\n" + "Host: " + host + "\r\n" + "User-Agent: GxEPD_WiFi_Example\r\n" + "Connection: close\r\n\r\n"); Serial.println("request sent"); while (client.connected()) { String line = client.readStringUntil('\n'); if (!connection_ok) { connection_ok = line.startsWith("HTTP/1.1 200 OK"); if (connection_ok) Serial.println(line); //if (!connection_ok) Serial.println(line); } if (!connection_ok) Serial.println(line); //Serial.println(line); if (line == "\r") { Serial.println("headers received"); break; } } if (!connection_ok) return; // Parse BMP header if (read16(client) == 0x4D42) // BMP signature { int32_t fileSize = read32(client); int32_t creatorBytes = read32(client); int32_t imageOffset = read32(client); // Start of image data int32_t headerSize = read32(client); int32_t width = read32(client); int32_t height = read32(client); uint16_t planes = read16(client); uint16_t depth = read16(client); // bits per pixel int32_t format = read32(client); int32_t bytes_read = 7 * 4 + 3 * 2; // read so far (void) creatorBytes; if ((planes == 1) && ((format == 0) || (format == 3))) // uncompressed is handled, 565 also { Serial.print("File size: "); Serial.println(fileSize); Serial.print("Image Offset: "); Serial.println(imageOffset); Serial.print("Header size: "); Serial.println(headerSize); Serial.print("Bit Depth: "); Serial.println(depth); Serial.print("Image size: "); Serial.print(width); Serial.print('x'); Serial.println(height); // BMP rows are padded (if needed) to 4-byte boundary uint32_t rowSize = (width * depth / 8 + 3) & ~3; if (depth < 8) rowSize = ((width * depth + 8 - depth) / 8 + 3) & ~3; if (height < 0) { height = -height; flip = false; } uint16_t w = width; uint16_t h = height; if ((x + w - 1) >= display.width()) w = display.width() - x; if ((y + h - 1) >= display.height()) h = display.height() - y; valid = true; uint8_t bitmask = 0xFF; uint8_t bitshift = 8 - depth; uint16_t red, green, blue; bool whitish = false; bool colored = false; if (depth == 1) with_color = false; if (depth <= 8) { if (depth < 8) bitmask >>= depth; //bytes_read += skip(client, 54 - bytes_read); //palette is always @ 54 bytes_read += skip(client, imageOffset - (4 << depth) - bytes_read); // 54 for regular, diff for colorsimportant for (uint16_t pn = 0; pn < (1 << depth); pn++) { blue = client.read(); green = client.read(); red = client.read(); client.read(); bytes_read += 4; whitish = with_color ? ((red > 0x80) && (green > 0x80) && (blue > 0x80)) : ((red + green + blue) > 3 * 0x80); // whitish colored = (red > 0xF0) || ((green > 0xF0) && (blue > 0xF0)); // reddish or yellowish? if (0 == pn % 8) mono_palette_buffer[pn / 8] = 0; mono_palette_buffer[pn / 8] |= whitish << pn % 8; if (0 == pn % 8) color_palette_buffer[pn / 8] = 0; color_palette_buffer[pn / 8] |= colored << pn % 8; //Serial.print("0x00"); Serial.print(red, HEX); Serial.print(green, HEX); Serial.print(blue, HEX); //Serial.print(" : "); Serial.print(whitish); Serial.print(", "); Serial.println(colored); } } display.fillScreen(GxEPD_WHITE); uint32_t rowPosition = flip ? imageOffset + (height - h) * rowSize : imageOffset; //Serial.print("skip "); Serial.println(rowPosition - bytes_read); bytes_read += skip(client, rowPosition - bytes_read); for (uint16_t row = 0; row < h; row++, rowPosition += rowSize) // for each line { if (!connection_ok || !(client.connected() || client.available())) break; delay(1); // yield() to avoid WDT uint32_t in_remain = rowSize; uint32_t in_idx = 0; uint32_t in_bytes = 0; uint8_t in_byte = 0; // for depth <= 8 uint8_t in_bits = 0; // for depth <= 8 uint16_t color = GxEPD_WHITE; for (uint16_t col = 0; col < w; col++) // for each pixel { yield(); if (!connection_ok || !(client.connected() || client.available())) break; // Time to read more pixel data? if (in_idx >= in_bytes) // ok, exact match for 24bit also (size IS multiple of 3) { uint32_t get = in_remain > sizeof(input_buffer) ? sizeof(input_buffer) : in_remain; uint32_t got = read8n(client, input_buffer, get); while ((got < get) && connection_ok) { //Serial.print("got "); Serial.print(got); Serial.print(" < "); Serial.print(get); Serial.print(" @ "); Serial.println(bytes_read); uint32_t gotmore = read8n(client, input_buffer + got, get - got); got += gotmore; connection_ok = gotmore > 0; } in_bytes = got; in_remain -= got; bytes_read += got; } if (!connection_ok) { Serial.print("Error: got no more after "); Serial.print(bytes_read); Serial.println(" bytes read!"); break; } switch (depth) { case 24: blue = input_buffer[in_idx++]; green = input_buffer[in_idx++]; red = input_buffer[in_idx++]; whitish = with_color ? ((red > 0x80) && (green > 0x80) && (blue > 0x80)) : ((red + green + blue) > 3 * 0x80); // whitish colored = (red > 0xF0) || ((green > 0xF0) && (blue > 0xF0)); // reddish or yellowish? break; case 16: { uint8_t lsb = input_buffer[in_idx++]; uint8_t msb = input_buffer[in_idx++]; if (format == 0) // 555 { blue = (lsb & 0x1F) << 3; green = ((msb & 0x03) << 6) | ((lsb & 0xE0) >> 2); red = (msb & 0x7C) << 1; } else // 565 { blue = (lsb & 0x1F) << 3; green = ((msb & 0x07) << 5) | ((lsb & 0xE0) >> 3); red = (msb & 0xF8); } whitish = with_color ? ((red > 0x80) && (green > 0x80) && (blue > 0x80)) : ((red + green + blue) > 3 * 0x80); // whitish colored = (red > 0xF0) || ((green > 0xF0) && (blue > 0xF0)); // reddish or yellowish? } break; case 1: case 4: case 8: { if (0 == in_bits) { in_byte = input_buffer[in_idx++]; in_bits = 8; } uint16_t pn = (in_byte >> bitshift) & bitmask; whitish = mono_palette_buffer[pn / 8] & (0x1 << pn % 8); colored = color_palette_buffer[pn / 8] & (0x1 << pn % 8); in_byte <<= depth; in_bits -= depth; } break; } if (whitish) { color = GxEPD_WHITE; } else if (colored && with_color) { color = GxEPD_RED; } else { color = GxEPD_BLACK; } uint16_t yrow = y + (flip ? h - row - 1 : row); display.drawPixel(x + col, yrow, color); } // end pixel } // end line } Serial.print("bytes read "); Serial.println(bytes_read); } Serial.print("loaded in "); Serial.print(millis() - startTime); Serial.println(" ms"); if (!valid) { Serial.println("bitmap format not handled."); } } void showBitmapFrom_HTTP(const char* host, const char* path, const char* filename, int16_t x, int16_t y, bool with_color) { Serial.println(); Serial.print("downloading file \""); Serial.print(filename); Serial.println("\""); drawBitmapFrom_HTTP_ToBuffer(host, path, filename, x, y, with_color); display.update(); } void drawBitmapFrom_HTTPS_ToBuffer(const char* host, const char* path, const char* filename, const char* fingerprint, int16_t x, int16_t y, bool with_color, const char* certificate) { // Use WiFiClientSecure class to create TLS connection #if USE_BearSSL BearSSL::WiFiClientSecure client; #else WiFiClientSecure client; #endif bool connection_ok = false; bool valid = false; // valid format to be handled bool flip = true; // bitmap is stored bottom-to-top uint32_t startTime = millis(); if ((x >= display.width()) || (y >= display.height())) return; display.fillScreen(GxEPD_WHITE); Serial.print("connecting to "); Serial.println(host); #if defined (ESP8266) client.setBufferSizes(4096, 4096); // doesn't help if (fingerprint) client.setFingerprint(fingerprint); #elif defined (ESP32) if (certificate) client.setCACert(certificate); #endif if (!client.connect(host, httpsPort)) { Serial.println("connection failed"); return; } Serial.print("requesting URL: "); Serial.println(String("https://") + host + path + filename); client.print(String("GET ") + path + filename + " HTTP/1.1\r\n" + "Host: " + host + "\r\n" + "User-Agent: GxEPD_WiFi_Example\r\n" + "Connection: close\r\n\r\n"); Serial.println("request sent"); while (client.connected()) { String line = client.readStringUntil('\n'); if (!connection_ok) { connection_ok = line.startsWith("HTTP/1.1 200 OK"); if (connection_ok) Serial.println(line); //if (!connection_ok) Serial.println(line); } if (!connection_ok) Serial.println(line); //Serial.println(line); if (line == "\r") { Serial.println("headers received"); break; } } if (!connection_ok) return; // Parse BMP header if (read16(client) == 0x4D42) // BMP signature { int32_t fileSize = read32(client); int32_t creatorBytes = read32(client); int32_t imageOffset = read32(client); // Start of image data int32_t headerSize = read32(client); int32_t width = read32(client); int32_t height = read32(client); uint16_t planes = read16(client); uint16_t depth = read16(client); // bits per pixel int32_t format = read32(client); int32_t bytes_read = 7 * 4 + 3 * 2; // read so far (void) creatorBytes; if ((planes == 1) && ((format == 0) || (format == 3))) // uncompressed is handled, 565 also { Serial.print("File size: "); Serial.println(fileSize); Serial.print("Image Offset: "); Serial.println(imageOffset); Serial.print("Header size: "); Serial.println(headerSize); Serial.print("Bit Depth: "); Serial.println(depth); Serial.print("Image size: "); Serial.print(width); Serial.print('x'); Serial.println(height); // BMP rows are padded (if needed) to 4-byte boundary uint32_t rowSize = (width * depth / 8 + 3) & ~3; if (depth < 8) rowSize = ((width * depth + 8 - depth) / 8 + 3) & ~3; if (height < 0) { height = -height; flip = false; } uint16_t w = width; uint16_t h = height; if ((x + w - 1) >= display.width()) w = display.width() - x; if ((y + h - 1) >= display.height()) h = display.height() - y; valid = true; uint8_t bitmask = 0xFF; uint8_t bitshift = 8 - depth; uint16_t red, green, blue; bool whitish = false; bool colored = false; if (depth == 1) with_color = false; if (depth <= 8) { if (depth < 8) bitmask >>= depth; //bytes_read += skip(client, 54 - bytes_read); //palette is always @ 54 bytes_read += skip(client, imageOffset - (4 << depth) - bytes_read); // 54 for regular, diff for colorsimportant for (uint16_t pn = 0; pn < (1 << depth); pn++) { blue = client.read(); green = client.read(); red = client.read(); client.read(); bytes_read += 4; whitish = with_color ? ((red > 0x80) && (green > 0x80) && (blue > 0x80)) : ((red + green + blue) > 3 * 0x80); // whitish colored = (red > 0xF0) || ((green > 0xF0) && (blue > 0xF0)); // reddish or yellowish? if (0 == pn % 8) mono_palette_buffer[pn / 8] = 0; mono_palette_buffer[pn / 8] |= whitish << pn % 8; if (0 == pn % 8) color_palette_buffer[pn / 8] = 0; color_palette_buffer[pn / 8] |= colored << pn % 8; //Serial.print("0x00"); Serial.print(red, HEX); Serial.print(green, HEX); Serial.print(blue, HEX); //Serial.print(" : "); Serial.print(whitish); Serial.print(", "); Serial.println(colored); } } display.fillScreen(GxEPD_WHITE); uint32_t rowPosition = flip ? imageOffset + (height - h) * rowSize : imageOffset; //Serial.print("skip "); Serial.println(rowPosition - bytes_read); bytes_read += skip(client, rowPosition - bytes_read); for (uint16_t row = 0; row < h; row++, rowPosition += rowSize) // for each line { if (!connection_ok || !(client.connected() || client.available())) break; delay(1); // yield() to avoid WDT uint32_t in_remain = rowSize; uint32_t in_idx = 0; uint32_t in_bytes = 0; uint8_t in_byte = 0; // for depth <= 8 uint8_t in_bits = 0; // for depth <= 8 uint16_t color = GxEPD_WHITE; for (uint16_t col = 0; col < w; col++) // for each pixel { yield(); if (!connection_ok || !(client.connected() || client.available())) break; // Time to read more pixel data? if (in_idx >= in_bytes) // ok, exact match for 24bit also (size IS multiple of 3) { uint32_t get = in_remain > sizeof(input_buffer) ? sizeof(input_buffer) : in_remain; uint32_t got = read8n(client, input_buffer, get); while ((got < get) && connection_ok) { //Serial.print("got "); Serial.print(got); Serial.print(" < "); Serial.print(get); Serial.print(" @ "); Serial.println(bytes_read); uint32_t gotmore = read8n(client, input_buffer + got, get - got); got += gotmore; connection_ok = gotmore > 0; } in_bytes = got; in_remain -= got; bytes_read += got; } if (!connection_ok) { Serial.print("Error: got no more after "); Serial.print(bytes_read); Serial.println(" bytes read!"); break; } switch (depth) { case 24: blue = input_buffer[in_idx++]; green = input_buffer[in_idx++]; red = input_buffer[in_idx++]; whitish = with_color ? ((red > 0x80) && (green > 0x80) && (blue > 0x80)) : ((red + green + blue) > 3 * 0x80); // whitish colored = (red > 0xF0) || ((green > 0xF0) && (blue > 0xF0)); // reddish or yellowish? break; case 16: { uint8_t lsb = input_buffer[in_idx++]; uint8_t msb = input_buffer[in_idx++]; if (format == 0) // 555 { blue = (lsb & 0x1F) << 3; green = ((msb & 0x03) << 6) | ((lsb & 0xE0) >> 2); red = (msb & 0x7C) << 1; } else // 565 { blue = (lsb & 0x1F) << 3; green = ((msb & 0x07) << 5) | ((lsb & 0xE0) >> 3); red = (msb & 0xF8); } whitish = with_color ? ((red > 0x80) && (green > 0x80) && (blue > 0x80)) : ((red + green + blue) > 3 * 0x80); // whitish colored = (red > 0xF0) || ((green > 0xF0) && (blue > 0xF0)); // reddish or yellowish? } break; case 1: case 4: case 8: { if (0 == in_bits) { in_byte = input_buffer[in_idx++]; in_bits = 8; } uint16_t pn = (in_byte >> bitshift) & bitmask; whitish = mono_palette_buffer[pn / 8] & (0x1 << pn % 8); colored = color_palette_buffer[pn / 8] & (0x1 << pn % 8); in_byte <<= depth; in_bits -= depth; } break; } if (whitish) { color = GxEPD_WHITE; } else if (colored && with_color) { color = GxEPD_RED; } else { color = GxEPD_BLACK; } uint16_t yrow = y + (flip ? h - row - 1 : row); display.drawPixel(x + col, yrow, color); } // end pixel } // end line } Serial.print("bytes read "); Serial.println(bytes_read); } Serial.print("loaded in "); Serial.print(millis() - startTime); Serial.println(" ms"); if (!valid) { Serial.println("bitmap format not handled."); } client.stop(); } void showBitmapFrom_HTTPS(const char* host, const char* path, const char* filename, const char* fingerprint, int16_t x, int16_t y, bool with_color, const char* certificate) { Serial.println(); Serial.print("downloading file \""); Serial.print(filename); Serial.println("\""); drawBitmapFrom_HTTPS_ToBuffer(host, path, filename, fingerprint, x, y, with_color, certificate); display.update(); } uint16_t read16(WiFiClient& client) { // BMP data is stored little-endian, same as Arduino. uint16_t result; ((uint8_t *)&result)[0] = client.read(); // LSB ((uint8_t *)&result)[1] = client.read(); // MSB return result; } int32_t read32(WiFiClient& client) { // BMP data is stored little-endian, same as Arduino. int32_t result; ((uint8_t *)&result)[0] = client.read(); // LSB ((uint8_t *)&result)[1] = client.read(); ((uint8_t *)&result)[2] = client.read(); ((uint8_t *)&result)[3] = client.read(); // MSB return result; } #if USE_BearSSL uint32_t skip(BearSSL::WiFiClientSecure& client, int32_t bytes) { int32_t remain = bytes; uint32_t start = millis(); while (client.connected() && (remain > 0)) { if (client.available()) { int16_t v = client.read(); remain--; } else delay(1); if (millis() - start > 2000) break; // don't hang forever } return bytes - remain; } uint32_t read(BearSSL::WiFiClientSecure& client, uint8_t* buffer, int32_t bytes) { int32_t remain = bytes; uint32_t start = millis(); while (client.connected() && (remain > 0)) { if (client.available()) { int16_t v = client.read(); *buffer++ = uint8_t(v); remain--; } else delay(1); if (millis() - start > 2000) break; // don't hang forever } return bytes - remain; } #endif uint32_t skip(WiFiClient& client, int32_t bytes) { int32_t remain = bytes; uint32_t start = millis(); while ((client.connected() || client.available()) && (remain > 0)) { if (client.available()) { int16_t v = client.read(); (void) v; remain--; } else delay(1); if (millis() - start > 2000) break; // don't hang forever } return bytes - remain; } uint32_t read8n(WiFiClient& client, uint8_t* buffer, int32_t bytes) { int32_t remain = bytes; uint32_t start = millis(); while ((client.connected() || client.available()) && (remain > 0)) { if (client.available()) { int16_t v = client.read(); *buffer++ = uint8_t(v); remain--; } else delay(1); if (millis() - start > 2000) break; // don't hang forever } return bytes - remain; }