Just like the tutorial does:
String ptr = "<!DOCTYPE html> <html>\n";
// [...]
ptr += "<div class=\"column\">\n";
ptr += "<img src=\"data:image/png;base64,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\" alt=\"NAME\" style=\"width:100%\">\n";
ptr += "</div>\n";
return prt;
Chip is ESP32D0WDQ6 (revision 1)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
MAC: 10:52:1c:67:68:94
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 921600
Changed.
Configuring flash size...
Auto-detected Flash size: 4MB
Compressed 8192 bytes to 47...
Wrote 8192 bytes (47 compressed) at 0x0000e000 in 0.0 seconds (effective 5957.9 kbit/s)...
Hash of data verified.
Compressed 17392 bytes to 11186...
Wrote 17392 bytes (11186 compressed) at 0x00001000 in 0.1 seconds (effective 1001.0 kbit/s)...
Hash of data verified.
Compressed 864704 bytes to 489151...
Wrote 864704 bytes (489151 compressed) at 0x00010000 in 8.0 seconds (effective 863.7 kbit/s)...
Hash of data verified.
Compressed 3072 bytes to 128...
Wrote 3072 bytes (128 compressed) at 0x00008000 in 0.0 seconds (effective 1890.5 kbit/s)...
Hash of data verified.
- Memory: 320 KiB RAM, 448 KiB ROM